WO2004082208A1 - 光ノード装置および網制御装置および保守者装置および光ネットワークおよび3r中継実施ノードの決定方法 - Google Patents
光ノード装置および網制御装置および保守者装置および光ネットワークおよび3r中継実施ノードの決定方法 Download PDFInfo
- Publication number
- WO2004082208A1 WO2004082208A1 PCT/JP2004/003301 JP2004003301W WO2004082208A1 WO 2004082208 A1 WO2004082208 A1 WO 2004082208A1 JP 2004003301 W JP2004003301 W JP 2004003301W WO 2004082208 A1 WO2004082208 A1 WO 2004082208A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical
- node
- node device
- section
- optical path
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0278—WDM optical network architectures
- H04J14/0284—WDM mesh architectures
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/29—Repeaters
- H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
- H04B10/299—Signal waveform processing, e.g. reshaping or retiming
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
- H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
- H04J14/0245—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU
- H04J14/0246—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for downstream transmission, e.g. optical line terminal [OLT] to ONU using one wavelength per ONU
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0241—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths
- H04J14/0242—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON
- H04J14/0249—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU
- H04J14/025—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU using one wavelength per ONU, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0254—Optical medium access
- H04J14/0256—Optical medium access at the optical channel layer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0254—Optical medium access
- H04J14/0256—Optical medium access at the optical channel layer
- H04J14/0257—Wavelength assignment algorithms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0254—Optical medium access
- H04J14/0256—Optical medium access at the optical channel layer
- H04J14/0258—Wavelength identification or labelling
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0254—Optical medium access
- H04J14/0267—Optical signaling or routing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
- H04J14/0254—Optical medium access
- H04J14/0267—Optical signaling or routing
- H04J14/0269—Optical signaling or routing using tables for routing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
- H04L41/12—Discovery or management of network topologies
Definitions
- the present invention is used in an optical network for switching and connecting optical signals.
- it relates to an optical network including an optical node device that performs 3R (Reshaping, Retiming, Regenerating) relaying.
- 3R relay In optical networks, 3R relay must be performed in the middle of an optical transmission line, taking into account fiber loss, loss, and crosstalk.
- Figure 87 shows a conventional optical network configuration.
- a 3R repeater is connected to the optical node device 1 001 on the optical transmission line.
- 3R repeaters 1 002 is inserted so that the deterioration of the optical signal can be compensated for regardless of the route set in any route (for example, see Non-Patent Documents 1, 2, and 3).
- Non-Patent Document 1 Eiji Oki, Daisaku Shimazaki, Kohei Shiomoto, Nobuaki Matsuura, Wataru Imajuku, Naoaki Yamanaka, "Performance Evaluation of Dynamic Wavelength Conversion GM PLS Network by Distributed Control", IEICE Technical Report, The Institute of Electronics, Information and Communication Engineers , February 2002, p.
- Non-Patent Document 2 Ken-ichi Sato, Naoaki Yamanaka, Yoshihiro Takigawa, Masafu mi Koga, Satoru Okamoto, Kohei Shiomoto, Eiji Oki, Wataru Imajuku, "GMPLS-Based Photonic Multilayer Router (Hikar i Router) Architecture: An Overview of Traffic Engineering and Signaling Technology ", IEEE Communications Magazine, March 2002, p.96-101
- Non-Patent Document 3 Eiji Oki, Daisaku Shimazaki, Kohei Shiomoto, Nobuak i Matsuura, Wataru Imajuku, Naoaki Yamanaka, "Performance of Distributed-Controlled Dynamic Wave Iength-Conversion on 6MPLS Networks", First International Conference on Optical Communications and Networks 2002, November 11-14, 2002, Shangri-La Hotel, Singapore
- 3R repeaters are expensive, and optical networks can be realized extremely economically if these 3R repeaters are not used as much as possible.
- conventionally there is no effective method for obtaining the transmission distance over the entire optical network without performing the 3R relay, and therefore, it is not possible to find a portion that does not need to include the 3R repeater.
- each optical node device performs 3R relay for all optical paths passing through the optical node device, and therefore, the 3R relay capability of the 3R repeater also requires a large number of optical paths. The ability to perform 3R relaying on paths at the same time is required, making it difficult to reduce costs. Disclosure of the invention
- the present invention has been made under such a background, and aims to effectively use network resources by using a required minimum number or a required minimum capacity of 3R repeaters to construct an economical optical network. It is an object of the present invention to provide an optical node device and an optical network that can perform such operations.
- the present invention efficiently utilizes 3R sections, which are sections where data can be transmitted without performing 3R relay, or generates 3R section information efficiently, so that 3R sections are not required.
- 3 Eliminates the need to install R repeaters, effectively uses network resources, and reduces the cost of optical networks.
- an optical node equipped with a 3R repeater can be identified by identifying a place where a 3R repeater is required. From the multiple optical paths that pass through the optical device, the optical path that truly requires 3R relay at the relevant optical node device can be extracted, and 3R relay can be performed only on the relevant optical path. Since the capacity of the 3R repeater can be reduced, network resources can be used effectively and the cost of the optical network can be reduced.
- a preset section in which data can be transmitted without 3R relay is referred to as a 3R section
- an optical node device serving as a start point of the 3R section is referred to as a 3R source node
- an end point of the 3R section is referred to as a 3R source node
- 3R destination node, the source node of the optical node device that is the source of the optical path setting request, and the destination node of the optical node device that is the end point of the optical path When bidirectional, an optical path in the direction from the source node to the destination node is defined as a downstream optical path, and an optical path in a direction from the destination node to the source node is defined as an upper optical path.
- a first aspect of the present invention is an optical node device for switching and connecting optical signals, a means for holding 3R section information corresponding to topology information of an optical network to which the node belongs, and a means for holding the 3R section information.
- Means for automatically judging whether or not the optical node device is an optical node device that implements 3R relay when setting an optical path via the own device by referring to the held 3R section information.
- each optical node device holds the 3R section information, so that when the optical path is set to itself, if the source node of the optical path is known, the optical signal transmitted through the optical path is transmitted. It is possible to autonomously determine whether or not to implement 3R relay with respect to.
- the optical node device of the present invention refers to a means for holding 3R section information corresponding to the topology information of the optical network to which the optical node device belongs, and the 3R section information held by the holding means.
- the optical node device other than the source node it is not necessary to determine whether or not to perform the 3R relay, so that the processing load can be reduced accordingly.
- An example For example, a large number of optical paths pass through the own optical node device, and if it is determined whether or not to implement 3R relay for all of these optical paths, the processing load becomes enormous. In this case, only for the optical path from which the own optical node device is the source node, to identify the other optical node device that performs 3R relay among other optical node devices that the optical path to the destination node goes through Then, the processing load can be reduced.
- the optical node device of the present invention corresponds to the topology information of the optical network to which the optical node device belongs when the optical node device is the optical node device through which the optical path between the source node and the destination node passes.
- each optical node device holds the 3R section information only when there is an optical path passing therethrough, so that the information storage resources can be effectively used.
- the determining means or the specifying means is an optical node device that performs 3R relay II in both directions of the lower optical path and the upper optical path. Is desirably provided.
- an optical node device that performs 3R relay in both uplink and downlink can be determined, and an optical signal can be transmitted immediately after the end of signaling. Therefore, it is possible to speed up the setting of the optical path.
- the determining means or the specifying means may include the one optical node device.
- the 3R in both the case where the one optical node device functions as the 3R originating node and the case where it does not function Compare the number of executions Based on the result of comparison between the When the number of 3R operations is smaller when the one optical node device functions as the 3R source node than when the one optical node device does not function as the 3R source node, the one It is desirable to have means for determining that the optical node device is an optical node device that performs 3R relay.
- an optical signal can be transmitted with the minimum number of 3R relays implemented, network resources can be effectively used by using the required minimum number or minimum capacity of 3R repeaters, and economical.
- a simple optical network can be configured.
- one optical node device is an optical node device corresponding to a 3R destination node
- the determining unit or the specifying unit transmits the one optical node device to the 3R destination node. It is preferable that a means is provided for determining that the one optical node device is an optical node device that implements 3R relay, with the optical node device at the next hop as a node and a 3R destination node as a 3R destination node.
- 3R relay transmission is realized without delay. it can.
- the determination means or the identification Means for making the one optical node device a 3R originating node and making the optical node device at the next hop destination of the one optical node device a 3R destination node so that the one optical node device performs 3R relaying It is desirable to have means for determining that this is an optical node device to be implemented.
- one optical node device is a 3R emitting node in the upper optical path, but is not a destination node, and the one optical node device is a 3R emitting node on the upper optical path. If it is not a node, it is determined that the previous hop source optical node device on the upstream optical path is a 3R originating node with the one optical node device as a 3R destination node.
- Means for transmitting a message to be transmitted to the upstream optical path wherein the determining means or the identifying means, when receiving the message on the upstream optical path, 3R optical node equipment It is desirable to have a means for determining that the node is a 3R originating node.
- an optical node device that does not correspond to any of the existing 3R section information can perform 3R relay without any delay. Therefore, instead of storing the 3R section information for all sections of the optical network, only the 3R section information of the key points need be stored, and the 3R section information can be stored efficiently.
- the optical node device of the present invention includes a means for retaining information between 3REs, each of which has its own 3R originating node, and a message included in the optical path setting request indicating that the own device is a 3R destination node. If it is not a destination node, it refers to the holding means described above, and if it is a 3R originating node on the optical path, it judges that it is an optical node device that implements 3R relay, and sends itself to the 3R originating node. A message for notifying the optical node device corresponding to the 3R destination node of the 3R section on the optical path serving as a node that the optical node device is a 3R destination node. According to this, it is not necessary to hold even the 3R section information irrelevant to the self, and the information storage resource can be used effectively.
- the self reference is made to the holding means and the self is not the 3R originating node on the optical path.
- it determines that it is an optical node device that implements 3R relay as a 3R originating node with the next hop destination optical node device as the 3R destination node, and also determines the next hop destination optical node device. It is desirable to provide a means for transmitting a message for transmitting that the optical node device is a 3R destination node.
- the message included in the optical path setting request causes It determines whether it needs to function as a 3R originating node or a 3R destination node.
- the optical path set by the optical path setting request includes: There may be cases where a 3R section other than the 3R section held by the optical node device is applied. It is difficult to determine this from the 3R section information of the optical node device. Therefore, based on the message included in the optical path setup request, the optical node device determines whether it needs to function as a 3R originating node or a 3R destination node.
- the optical node device of the present invention includes: a unit for holding 3R section information that sets itself as a 3R originating node and a 3R destination node;
- the node refers to the holding means, and when the self node is the 3R originating node on the lower optical path, the optical node device performs the 3R relay. And notifies that the optical node device is the 3R destination node to the optical node device corresponding to the 3R destination node in the 3R section on the downstream optical path with itself as the 3R originating node.
- the self reference means is referred to and the lower self
- the self node is set to the lower node.
- the optical node device that performs the 3R relay as the 3R originating node with the next hop destination optical node device on the optical path as the 3R destination node It is determined that there is Means for transmitting a message to the optical device to inform that the optical node device is its own 3R destination node.
- the node Upon receiving a message indicating that the node is an R originating node, the node determines that the node is an optical node device that performs 3R relay on the upstream optical path, and if the node is not a destination node, refer to the holding means and refer to the holding means. Is not the 3R destination node on the upper optical path, the previous hop source optical node device on the upstream optical path determines that it is the 3R originating node with its own .3R destination node. It is desirable to have means for sending a message to be transmitted to the hop source optical node device.
- 3R relay transmission in a bidirectional optical path can be realized without delay even in an optical node device which does not hold the 3R section information.
- the 3R section information of the 3R originating node and the 3R destination node is held, but the other 3R section information is not held.
- the included message will determine whether it needs to function as a 3R originating node or a 3R destination node.
- an optical path setting request arrives at an optical node device that is a 3R originating node or a 3R destination node in a 3R section of an optical path
- the optical path set by the optical path setting request may be applied.
- a second aspect of the present invention is a network control device for managing an optical network including a plurality of optical node devices for switching and connecting optical signals, and an optical transmission line connecting the plurality of optical node devices. It is.
- the network control device of the present invention has a means for holding 3R section information corresponding to the topology information of the optical network, and a means for holding the 3R section information in response to a request from the optical node device. Means for providing the 3R section information to the optical node device.
- the optical node device of the present invention provides a network control for managing an optical network to which the optical node device belongs.
- a means is provided for requesting and obtaining the 3R section information corresponding to the topology information of the optical network from the control device.
- the acquiring unit includes a unit that selects and holds at least a part of information relating to itself from the acquired 3R section information. That is, in the present invention, a case where all optical node devices hold the same 3R section information, a case where an optical node device having an optical path passing through its own optical node device holds 3R section information, There is a case where the source node of 3R holds 3R section information, and a case where the 3R source node or 3R destination node holds 3R section information relating to itself. In order to respond flexibly to each of these cases, it is convenient if there is a means to promptly provide the 3R section information required by each optical node device to each optical node device. For example, a network controller is provided, and this network controller provides the necessary 3R section information to each optical node device in response to a request from each optical node device. The device can quickly acquire the 3R section information required by itself.
- the optical node device of the present invention provides an optical network device that manages the optical network to which the optical node device belongs.
- an optical node device that requests and obtains 3R section information from the network control device is a part of the optical node device, and a part of the optical node that has obtained the 3R section information from the network control device.
- all optical node devices can maintain common 3R section information. It is desirable to apply this method to the case where the network resources can be used more effectively than when all optical node devices individually request and acquire 3R section information from the network control device.
- the optical node device of the present invention transmits to the network control device that manages the optical network to which the node belongs.
- the self Means for transmitting to another optical node device included in the optical path up to the arrival node at the time of the occurrence are examples of the optical node device included in the optical path up to the arrival node at the time of the occurrence.
- the optical node device corresponding to the source node requests the network control device to acquire the 3R section information, and can transmit the acquired 3R section information to other optical node devices on the route.
- the optical node device requests the network control device to acquire the 3R section information, and can transmit the acquired 3R section information to other optical node devices on the route.
- the optical node device of the present invention sends a request to the network control device that manages the optical network to which it belongs.
- a means for holding the advertisement content may be provided.
- the optical node device corresponding to the source node requests and obtains 3R section information from the network control device, and advertises the obtained 3R section information to other optical node devices.
- the optical node device corresponding to the source node does not need to limit the advertisement destination to other optical node devices on the route, and can reduce the processing load required for such limitation.
- the optical node device receiving the advertisement may discard the advertisement if it is unrelated to itself.
- the optical node device of the present invention comprises: means for holding information on the number of hops H between itself and the 3R destination node in the 3R section to which the self belongs; and a 3R source node in the 3R section to which the self belongs.
- the own optical node device is not the 3R destination node, but only a few hops away is the 3R destination node, and if there is room for the processing capacity of its own 3R trunk, it will become the 3R destination node.
- the 3R relay load on the optical node device corresponding to the 3R destination node ie, the 3R originating node in the next 3R section
- the threshold values T H — T and T H — H are set appropriately according to the 3R relay capability of the optical node device or the optical node device corresponding to the 3R destination node. For example, the smaller the number of 3R trunks of the 3R originating node in the next 3R section is smaller than the number of 3R trunks of the own optical node device, the more the own optical node device becomes the 3R originating node of the next 3R section. Since the necessity of assisting the 3R relay of the node becomes large, TH-T is set to a small value. It is desirable to implement this to support 3R relay of the 3R originating node in the next 3R section.
- TH— TH and TH— ⁇ are appropriately set in consideration of the number of hops in the entire 3R section, ie, the 3R destination node, ie, the number of 3R trunks of the 3R originating node in the next 3R section. .
- a third aspect of the present invention is an optical network including the optical node device of the present invention or the network control device of the present invention.
- a fourth aspect of the present invention is a method for determining a 3R relay execution node, the method including determining a plurality of different 3R sections including overlapping portions on an optical path passing through one optical node device. If the optical node device is a 3R originating node in any 3R section and does not correspond to a 3R originating node or a 3R destination node in other 3R sections, the one optical node Refer to 3R section information related to the optical path from to the destination node Then, the number of times of execution of the 3R in both the case where the one optical node device functions as the 3R originating node and the case where the one optical node device does not function is compared.
- one optical node device is an optical node device corresponding to a 3R destination node, and when the optical node device is not a destination node, the one optical node device is It is determined that the one optical node device is an optical node device that performs 3R relay, with the optical node device at the next hop as the R originating node and the 3R destination node.
- one optical node device does not belong to any of the 3R sections having a 3R source node on an optical path passing through the one optical node device.
- the one optical node device is a 3R originating node
- the next optical hop device of the one optical node device is a 3R destination node
- the one optical node device is a 3R relay. Is determined to be an optical node device that performs the following.
- one optical node device is a 3R source node in the upper optical path but is not a destination node, and the one optical node device is not a destination node.
- the previous optical node device on the upstream optical path is the 3R originating node using the one optical node device as the 3R destination node.
- the optical node device that has transmitted the message to the previous hop source optical node device that has received the message, the optical node device that has received the message on the upstream optical path transmits the message on the upstream optical path itself.
- the node device is determined to be the 3R originating node with the 3R destination node.
- the optical node device corresponding to the 3R originating node holds 3R section information relating to itself, and the 3R destination node included in the optical path setting request.
- the 3R section information is referred to when the node is the 3R originating node on the optical path.
- An optical node device that is determined to be an optical node device to be implemented and that is equivalent to a 3R destination node in a 3R section on an optical path that uses itself as a 3R source node Sends a message to inform that the optical node device is a 3R destination node.
- the self reference is made to the 3R section information and the self If it is not, it determines that it is an optical node device that implements 3R relay as a 3R originating node with the next hop destination optical node device as the 3R destination node, and sends the next hop destination optical node device It is desirable to transmit a message for transmitting that the optical node device is a 3R destination node.
- the method for determining a 3R relay execution node of the present invention includes: holding 3R section information regarding itself as a 3R originating node and a 3R destination node; When receiving the message indicating that the node is a 3R destination node, if the node is not the destination node, the node refers to the 3R section information, and if the node is a 3R source node on the downstream optical path, performs 3R relay.
- the optical node device is determined to be an optical node device
- the optical node device corresponding to the 3R destination node in the 3R section on the downstream optical path having itself as the 3R originating node is referred to as the optical node device.
- the node refers to the 3R section information when the node is not the destination node.
- a message is transmitted to the optical node device corresponding to the source node to inform that the optical node device is a 3R source node.
- the self-receiver when the self-receiver is not a destination node in response to a message indicating that the self is a 3R destination node in the downstream optical path and included in the optical path setting request, the self refers to the 3R section information and the self If it is not the above 3R originating node, it determines that it is an optical node device that implements 3R relay as a 3R originating node with the optical node device of the next hop destination on the optical path as the 3R destination node when it is not the 3R originating node. A message is transmitted to the next hop optical node device indicating that the optical node device is its own 3R destination node.
- Smell Receiving the message indicating that it is a 3R originating node, determines that it is an optical node device that implements 3R relay in the upper optical path, and if it is not the destination node, it refers to the 3R section information. If it is not the 3R destination node on the upper optical path, the previous hop source optical node device on the upper optical path must be the 3R originating node with itself as the 3R destination node. It is desirable to send a message to convey this to the previous hop source optical node device.
- the method for determining a 3R relay execution node includes a method in which the number of hops between itself and the 3R destination node in the 3R section to which one optical node device belongs is H, and the one optical node device is provided with When the number of 3R trunks is T, the threshold of the number of empty 3R trunks is TH—, and the threshold of the number of hops to the 3R destination node is TH_H,
- the one optical node device is an optical node device that performs 3R relay.
- a fifth aspect of the present invention is an optical node device for switching and connecting optical signals, wherein the optical path setting request includes a wavelength used in order from the source node in the case of switching connection from the source node to the destination node.
- a designated label the label is deleted each time one wavelength is used, and the switching means includes wavelength conversion means or 3R relay means, and A means for retaining the information on the number of hops H between itself and the 3R destination node, and whether the own 3R relay is performed on the optical signal transmitted from the 3R source node in the 3R section to which the own node belongs.
- the threshold for the number of hops to the destination node is TH—H.
- the optical node device When the optical path is bidirectional, the optical node device according to the present invention is configured such that an optical path from the source node to the destination node is a downstream optical path, and an optical path from the destination node to the source node is an upstream optical path.
- the optical path setting request includes a label that specifies the wavelength to be used in order from the source node when switching from the source node to the destination node, and one label is set for the label.
- the switching connection means includes wavelength conversion means or 3R relay means, and the number of hops H between itself and the 3R destination node in the 3R section to which the self belongs in the upstream optical path is deleted.
- the self belongs to the 3R section where the source node is the 3R destination node, it is desirable to have a means for judging that the self does not execute the 3R relay irrespective of the judgment result of the judgment means.
- a sixth aspect of the present invention is an optical network constituted by the optical node device of the present invention.
- a seventh aspect of the present invention is a method for determining a 3R relay execution node in an optical node device that switches and connects optical signals, wherein the optical path setting request includes a request when switching from the source node to the destination node.
- a label designating a wavelength to be used in order from the source node, wherein the label is deleted each time one wavelength is used, and the optical node device and 3 in the 3R section to which the optical node device belongs are included.
- R Number of hops with destination node H Information and autonomously decides whether or not the optical node device performs 3R relay on an optical signal transmitted from a 3R source node in a 3R section to which the optical node device belongs.
- the threshold of the number of empty trunks is ⁇
- the threshold of the number of hops to the 3R destination node is ⁇
- the remaining And the threshold for the number of remaining labels is given by
- the method for determining a 3R relay execution node of the present invention is such that, when the optical path is a bidirectional optical path, the optical path from the source node to the destination node is a downstream optical path, and the destination node is the source node.
- the outgoing optical path is defined as the upstream optical path, and the optical path setup request includes a label that specifies the wavelength to be used in order from the source node when switching connection from the source node to the destination node.
- Is deleted every time one wavelength is set holds information on the number of hops H between itself and the 3R destination node between the 3Rs to which the self belongs in the upstream optical path, and A function to perform wavelength conversion or 3R relay when autonomously determining whether or not to perform 3R relay for an optical signal transmitted from a 3R source node in the 3R section to which the node belongs.
- Number of trunks provided, empty trunks Threshold TH- Ding, 3 R wear threshold TH- H of number of hops to the node, the number of labels remaining, the threshold of the number of labels remaining was T H- L and
- the own optical node device is not the 3R destination node, but only a few hops away is the 3R destination node, and if there is room for the processing capacity of its own 3R trunk, it will become the 3R destination node.
- the 3R relay load on the optical node device corresponding to the 3R destination node ie, the 3R originating node in the next 3R section
- 3R relays use wavelength converters that convert optical signals into electrical signals and then convert them into optical signals again. Can also be used.
- the optical path setting request includes a label that specifies the wavelength to be used in order from the source node when switching from the source node to the destination node, and this label is Since one is deleted each time a wavelength is used, the distance to the destination node can be estimated by examining the number of remaining labels. For this reason, the present invention also utilizes the number of remaining labels.
- the optical node device in front of the 3R destination node takes over the 3R relay to be performed by the 3R destination node, the original 3R section may be shortened. Therefore, it is not desirable to perform such shouldering in a chaotic manner, since the number of 3R relays performed from the source node to the destination node may increase. Therefore, in the present invention, attention is paid to the 3R inheritance capability, the number of hops to the 3R destination node, and the number of remaining labels, and a threshold value is set for these to give order and the shoulder is replaced.
- One of the decision policies used at this time was to suppress the increase in the number of 3R relays performed between the first and second nodes.
- the other one is
- the former only performs the shoulder change from a position close to both the 3R wearing node and the wearing node. Therefore, the shoulder replacement is performed from the time when the destination node approaches. In the latter case, if the number of hops to the 3R destination node is less than the threshold, the above-mentioned shoulder substitution is performed even if the distance to the destination node is long. Therefore, the latter can be a target for a larger number of optical node devices to perform the shoulder replacement than the former, and the former performs the shoulder replacement from the point in time when the destination node approaches. The possibility of increasing the number of 3R implementations up to the destination node has a lower advantage than the latter.
- the optical node device that performs the shoulder replacement can be set anywhere on the optical path, there is an advantage that the shoulder replacement can be performed efficiently. Since each has different advantages, it is desirable to select the former or the latter as appropriate according to the situation of the optical network.
- the optical node device corresponding to the destination node is an optical node device that does not need to perform 3R relay. Therefore, it is not necessary to consider the change in the optical node device that does not need to perform such 3R relay.
- the optical path is a bidirectional optical path
- the 3R destination node is closer to the source node
- the 3R source node is closer to the destination node
- an optical node device that performs 3R relay is set. You. Therefore, the direction of the inequality between the number of remaining labels and the threshold is opposite to that in the case of the downstream optical path.
- an optical node device that performs 3R relay simultaneously for both the downstream and upstream optical paths is set.
- the optical node device corresponding to the source node must perform 3R relay in the upper optical path. It is an unnecessary optical node device. Therefore, it is not necessary to consider the replacement for the optical node device that does not need to implement such 3R relay.
- An eighth aspect of the present invention is an optical node device for switching and connecting optical signals, wherein a means for detecting a deterioration state of an optical signal arriving at the node is provided, and a detection result of the detecting means detects signal deterioration.
- each optical node device can set an appropriate 3R interval while performing actual measurement in the process of setting an optical path or in the process of switching and connecting optical signals.
- the optical node device comprises: means for detecting the state of deterioration of the optical signal arriving at the node; and 3R for the optical signal arriving at the node when the detection result of the detecting means detects signal deterioration.
- Means for performing relay means for performing relay.
- each optical node device can set an appropriate 3R section while performing actual measurement in the process of setting up an optical path or in the process of switching and connecting optical signals.
- the optical node device of the present invention exchanges and connects optical signals, and sequentially transmits one optical node device to the other optical node device included in the path from itself to the destination node from the next hop adjacent optical node device.
- An optical node device that sequentially sets an optical path for each hop, wherein an optical path is sequentially set for each of the other optical node devices included in the route to the destination node from an adjacent optical node device of the next hop one by one hop.
- the test optical signal is sent out Means for receiving a report on the deterioration status of the test optical signal from the farthest end other optical node device that has received the test optical signal every time the test optical signal is received, and the test based on the report result received by the receiving means. Means for requesting the other optical node device corresponding to the immediately preceding hop of the farthest-end other optical node device to perform 3R relay when the degradation state of the optical signal for use satisfies a predetermined degradation condition.
- the other optical node device requested to perform the 3R relay is configured to transmit light to the other optical node devices included in the route to the destination node in order from the next hop adjacent optical node device one hop at a time.
- Test in order Means for receiving a report of the deterioration state of the test optical signal from the farthest other optical node device that has received the test optical signal every time the optical signal is transmitted; and When the deterioration state of the test optical signal based on the report result satisfies a predetermined deterioration condition, 3R is applied to another optical node device corresponding to a hop immediately before the farthest end other optical node device.
- the optical node device of the present invention comprises: means for holding a value Q predetermined for each link based on optical signal deterioration characteristics in a link between itself and an adjacent node; Means for transmitting the initial value P of the subtracted value to the adjacent optical node device of the next hop, and the device itself receiving the initial value P from the adjacent optical node device of the previous hop or from the initial value P already.
- the means for calculating (P-Q) or ( ⁇ '-Q) is compared with the calculation result of the means for calculating and the threshold.
- the calculation result is transmitted to the adjacent optical node device of the next hop. If the calculated result is equal to or smaller than the threshold value, 3R relay is performed on the optical signal arriving at the self node. The subtracted value is not the arrival node of the transmitted optical path. Kiniwa, and means for transmitting ⁇ initial value of the subtraction value to the adjacent light Roh once device next hop self as 3 R onset nodes.
- the amount of information held by each optical node device is only the value of Q relating to itself and the initial value P transmitted to the adjacent optical node device when the device is the source node, With a very small amount of information, it is possible to autonomously determine whether or not it needs 3R relay along with the optical path setting, thus eliminating the processing load required for 3R section information generation or collection. be able to. Furthermore, when setting the optical path, it is not necessary to measure the state of deterioration of the optical signal, and the speed of setting the optical path can be increased.
- optical node device of the present invention assumes a downstream optical path in a unidirectional optical path or a bidirectional optical path. Next, a description is given assuming the upper optical path in the bidirectional optical path.
- An optical node device includes means for detecting a deterioration state of an optical signal of an upstream optical path arriving at the node, and an adjacent node corresponding to the next hop of the node when the detection result of the detecting unit detects signal deterioration.
- O means for relaying o
- the necessity of the 3R relay is recognized by detecting the deterioration state of the optical signal actually arriving at the own optical node device, and the 3R relay is transmitted to the adjacent optical node device corresponding to the previous hop.
- Request and the optical node device receiving this request activates the function as an optical node device that performs 3R relay.
- each optical node device can set an appropriate 3R interval while performing actual measurement in the process of setting an optical path or in the process of switching and connecting optical signals.
- the optical node device includes a means for detecting a deterioration state of an optical signal of an upstream optical path arriving at the node, and arriving at the self when the detection result of the detecting unit detects signal deterioration.
- 3R relay is recognized by detecting the deterioration state of the optical signal actually arriving at the own optical node device, and the function as an optical node device performing 3R relay is activated. This allows each optical node device to set an appropriate 3R section while performing actual measurements during the optical path setting process or the optical signal exchange connection process. Wear.
- the optical node device of the present invention when the optical node device of the present invention is the originating node, the optical node device sequentially transmits light from the adjacent optical node device of the next hop one by one to the other optical node devices included in the path to the destination node.
- Optical node to be implemented In the case of the optical node device, an optical path is sequentially set for each of the other optical node devices included in the path from the self to the destination node one by one hop sequentially from the next optical node device of the next hop, and the test optical signal is transmitted. There is provided a means for receiving and notifying a report of the deterioration state of the test optical signal to a source of the test optical signal.
- the processing load required for generating the R section information can be reduced. It is desirable to execute the procedure for setting up the upstream optical path simultaneously with the procedure for setting up the downstream optical path.
- the optical node device of the present invention comprises: means for holding a value q predetermined for each link based on optical signal deterioration characteristics in a link between itself and an adjacent node; Means for transmitting the initial value P of the added value to the adjacent optical node device of the next hop, and the device itself receiving the initial value P or the initial value P from the adjacent optical node device of the previous hop.
- the means for calculating (p + q) or ( ⁇ '+ q) is compared with the calculation result of this calculation means and the threshold.
- the calculation result is transmitted to the adjacent optical node device of the next hop. If the calculated result is larger than the threshold, 3R relay is performed on the optical signal arriving from the upstream optical path. Means for transmitting and receiving the added value. In the case no de, 3 self in the upstream optical path R Chakunoichi Means for transmitting the initial value p of the value to be added to the adjacent optical node device of the next hop.
- the amount of information held by each optical node device is only the value of q relating to itself and the initial value p to be transmitted to the adjacent optical node device when the device is the source node.
- a ninth aspect of the present invention is an optical network constituted by the optical node device of the present invention.
- an optical node device included in a path from a source node to a destination node is sequentially hop by hop from an optical node device adjacent to the next hop of the optical node device serving as the source node.
- This is an optical path setting method for sequentially setting optical paths.
- the optical path setting method of the present invention includes: an optical node device included in a route to the destination node; an adjacent optical node of a next hop of the optical node device serving as the source node; A first step of transmitting a test optical signal from the optical node device serving as the source node each time an optical path is set in order from the device one hop at a time to the destination node; For each optical node device included in the path, the test optical signal power is sequentially transmitted one hop at a time from the adjacent optical node device of the next hop of the optical node device serving as the source node.
- the optical node device serving as the source node performs 3R relay with respect to the optical node device corresponding to the immediately preceding hop of the optical node device at the farthest end.
- the optical node device requested to perform the 3R relay operation is connected to another optical node device included in the path to the destination node from the adjacent optical node device at the next hop.
- Next hop to the optical node device Each time a test optical signal is sent out one hop at a time from an adjacent optical node device, the farthest-end other optical node device that received the test optical signal reports the deterioration status of the test optical signal.
- an eleventh aspect of the present invention is a method for setting a 3R relay execution node in an optical node device that switches and connects optical signals, wherein each optical node device is configured to communicate between itself and an adjacent node.
- a value Q predetermined for each link is held based on the optical signal degradation characteristics of the link between the nodes, and the optical node device that is the source node subtracts the subtracted value from the adjacent optical node device of the next hop.
- the optical node device transmits the initial value P, and each optical node device receives the initial value P or the subtracted value P ′ which has already been subtracted from the initial value P from the adjacent optical node device at the previous hop.
- optical path setting method or the 3R relay execution node setting method of the present invention assumes a lower optical path in a unidirectional optical path or a bidirectional optical path. Next, a description will be given assuming an upstream optical path in the bidirectional optical path.
- the optical node device which is the source node of the optical node device, sequentially starts from the next hop adjacent optical node device with respect to other optical node devices included in the route to the destination node, one hop at a time for each incense.
- An optical path is sequentially set for the optical node device one hop at a time from an adjacent optical node device of the next hop, and the test optical signal is received, and a report of the deterioration status of the test optical signal is reported to the test optical signal. And an eleventh step of notifying the signal source.
- a twelfth aspect of the present invention is a method for setting a 3R relay execution node in an optical node device that switches and connects an optical signal, wherein each optical node device is configured to communicate between itself and an adjacent node.
- the optical node device which is the source node, holds the initial value p of the augmented value for the next-hop adjacent optical node device based on the optical signal degradation characteristics of the link between them.
- each optical node device transmits (p + q) or ( ⁇ '+ q) is calculated, and this calculation result is compared with the threshold value.
- the calculation result is transmitted to the adjacent optical node device of the next hop, and the threshold value is calculated.
- the optical signal arriving from the upstream optical path When the 3R relay is performed on the node and it is not the destination node of the optical path to which the augmented value is transmitted, the self is regarded as the 3R destination node in the upper optical path, and the initial value of the augmented value is set. P is transmitted to the next hop adjacent optical node device.
- each optical node device autonomously determines the necessity of implementing 3R relay and sequentially performs 3R relay when setting an optical path or switching connection of an optical signal.
- Optical network can be easily configured.
- a thirteenth aspect of the present invention is a network control device that manages an optical network including a plurality of optical node devices that exchange and connect optical signals and an optical transmission line that connects the plurality of optical node devices.
- a topology information holding means for holding topology information of the optical network; and 3R section estimation information for setting the optical node device designated based on the input hop number information as a 3R source node.
- Means for creating the above means for changing part or all of the 3R section estimation information on the topology information created by the means for creating based on the input instruction, Means for notifying the information of the 3R section on the topology information changed by the means to the optical node device. Means.
- a fourteenth aspect of the present invention is to manage an optical network including a plurality of optical node devices for switching and connecting optical signals, and an optical transmission line connecting the plurality of optical node devices, and The maintenance equipment that gives the hop number information to the network control device that creates the estimated information of the 3R section on the topology information with the optical node device designated as the 3R originating node based on the obtained hop number information
- the hop number information is an estimated value of the number of hops in the 3R section, means for generating the estimated number of hops, and the topology information of the optical network is converted into the type and wavelength of the optical fiber used in the optical network.
- Po mouth The number of hops by referring to the information of the optical fiber / type and wavelength band on the report and the optical file / ⁇ type and wavelength band and the degree of deterioration of the optical signal per unit section recorded in the table. Generate an estimate.
- the estimated number of hops in the 3R section can be obtained with high accuracy.
- a route has a very large number of physical links due to combinations of optical fibers, wavelengths, etc. on the route.
- the difference affects the distance over which data can be transmitted without 3R relay.
- the distance that can be transmitted differs depending on the fiber characteristics such as a normal fiber and a dispersion shift fiber.
- an estimated value with few errors can be obtained by referring to the information of the optical fiber type and the wavelength band.
- the network control device of the present invention includes a topology information holding unit that holds the topology information of the optical network, and an optical node device designated based on the input hop number information as a 3R originating node. Create R section estimation information on the topology information And instructing the optical node device to set a test optical path in a section on the optical network corresponding to the 3R section estimation information on the topography information created by the creating means. Means for collecting the actual measurement result of the degree of optical signal deterioration by the test optical node set by the optical node device by the means for instructing; and the optical signal deterioration collected by the collecting means.
- the present invention manages an optical network including a plurality of optical node devices that exchange and connect optical signals and an optical transmission line that connects the plurality of optical node devices, and manages the optical network based on input hop number information.
- 3R section estimation information in which the designated optical node device is the 3R originating node is created on the topology information, and the optical network corresponding to the 3R section estimation information on the created topology information is created.
- the optical node device is instructed to set a test optical path in a section on the workpiece, and the instruction is used to measure the degree of optical signal deterioration due to the test optical path set by the optical node device.
- the information in the network control unit for notifying the optical node device is an optical node device that notifies the measurement result of the optical signal deterioration degree by the test optical path.
- the optical node device of the present invention includes: a unit for setting a test optical path instructed by the network control device; and an optical signal deterioration degree of the test optical path set by the setting unit.
- Means for controlling the network Means for notifying the device.
- the network control device of the present invention includes: a topology information holding unit that holds the topology information of the optical network; and 3R section information that holds a 3R section set in the optical network corresponding to the topology information.
- Holding means means for collecting traffic demand information in the optical network; and the 3R section information holding means in a section in which traffic demand has increased based on the traffic demand information collected by the collecting means.
- the network control device of the present invention includes: a topology information holding unit that holds the topology information of the optical network; and a 3R section that holds a 3R section set in the optical network corresponding to the topology information.
- Information holding means means for collecting traffic demand information in the optical network, and holding of the 3R section information in a section in which traffic demand increases based on the traffic demand information collected by the collecting means.
- new 3R section information can be automatically added to the initially collected 3R section information.
- 3R section information can be collected for sections where traffic demand has increased since the first 3R section information was collected. This makes it possible to efficiently collect useful 3R section information.
- the optical node device comprises: means for detecting a deterioration state of an optical signal arriving at the self; and an adjacent node corresponding to the immediately preceding hop of the self when the detection result of the detecting means detects signal deterioration.
- the deterioration state of the optical signal actually arriving at the own optical node device is detected.
- the adjacent optical node device corresponding to the previous hop is notified of the necessity of the 3R relay. Recognize that it is a 3R source node in the next 3R section.
- 3R section information can be generated based on the notification. This allows each optical node device to set an appropriate 3R section and update 3R section information while performing actual measurements during the optical path setting process or the optical signal exchange connection process.
- the optical node device of the present invention comprises: means for detecting a deterioration state of an optical signal arriving at the node; and when the detection result of the detecting means detects signal deterioration, the node itself is the 3R destination node and It has means for recognizing that it is the 3R originating node of the R section, and means for updating the 3R section information held by itself based on the recognition result.
- 3R relay is recognized by detecting the deterioration state of the optical signal actually arriving at the own optical node device, and the self is the 3R destination node and the 3R relay in the next 3R section. Recognize that it is an R originating node.
- 3R section information can be generated based on the detection result. This allows each optical node device to set an appropriate 3R section and update 3R section information while performing actual measurements during the optical path setting process or the optical signal exchange connection process. it can.
- the optical node device of the present invention is an optical node device that switches and connects optical signals to generate 3R section information on a path from itself to a destination node, and is included in a path to the destination node.
- 1 next hop from adjacent optical node device to other optical node device 1
- Each time a test optical signal is sent out one hop at a time from the adjacent optical node device of the next hop the deterioration status of the test optical signal from the farthest end other optical node device that received the test optical signal is shown.
- the test optical signal is received farthest.
- the other optical node device corresponding to the immediately preceding hop of the farthest other optical node device is the 3R destination node and the 3R in the next 3R section.
- the 3R section information can be generated while actually setting the optical path, there is no need to generate the 3R section information in advance, and the processing load required for generating the 3R section information is eliminated. Can be omitted.
- the optical node device may be configured such that the test optical device from the next optical node device of the next hop is sequentially transmitted one hop from another optical node device included in the link to be measured for the 3R section information.
- Means for transmitting a test optical signal every time, and the transmitting means sequentially transmits the test optical signal to the other optical node devices included in the link to be measured one hop at a time from the adjacent optical node device of the next hop.
- the other optical device corresponding to the immediately preceding hop of the farthest other optical node device is the 3R destination node and Means for recognizing as a 3R originating node in the next 3R section.
- the 3R section information can be generated by the same procedure as when actually setting the optical path, so that highly accurate 3R section information based on actual measurement can be generated.
- the own optical node device becomes the source node and can hold the 3R section information when setting the optical path.
- each optical node device can share 3R section information generated by itself and others. According to this, not only when the own optical node device becomes the source node but also in the 3R section information when the other optical node device becomes the source node, the other optical node device becomes the source node. Then, the own optical node device can determine by itself whether or not to perform 3R relay. Therefore, if the source optical node device issues a 3R relay request to the optical node device that performs 3R relay, the processing load can be reduced.
- a means for managing the optical network and notifying the network control device holding information on the 3R section in the optical network of the recognition result by the recognizing means may be provided.
- the network control device can hold the 3R section information of the entire optical network. Therefore, the optical node device can request and acquire the 3R section information from the network control device as needed, so that the optical node device does not need to have a large-capacity storage device such as a database. In addition, each optical node device does not need to advertise the 3R section information generated by itself to a large number of other optical node devices. Only the network controller needs to be notified of the 3R section information generated by itself, and the processing load required for advertisement can be reduced.
- the network control device includes means for receiving the information of the 3R destination node or the 3R originating node from the optical node device constituting the optical network and updating the held information of the 3R section. .
- the optical node device of the present invention comprises: means for holding a value Q predetermined for each link based on optical signal deterioration characteristics in a link between itself and an adjacent node; Means for transmitting the initial value P of the subtracted value to the adjacent optical node device of the next hop, and the device itself receiving the initial value P from the adjacent optical node device of the previous hop or from the initial value P already.
- the means for calculating (P-Q) or ( ⁇ '-Q) is compared with the calculation result of the means for calculating and the threshold. If the value is larger than the threshold, the calculation result is transmitted to the adjacent optical node device of the next hop.
- the processing load required for advertisements and the like can be reduced because it is possible to autonomously determine whether or not to require 3R relaying with the setting of the optical path. Furthermore, when setting the optical path, it is not necessary to measure the deterioration state of the optical signal, and the speed of setting the optical path can be increased.
- optical node device or the network control device of the present invention assumes a unidirectional optical path or a downstream optical path in a bidirectional optical path.
- a description will be given assuming an upstream optical path in the bidirectional optical path.
- An optical node device includes a unit for detecting a deterioration state of an optical signal of an upstream optical path arriving at the node, and a unit for detecting a signal deterioration based on a detection result of the detecting unit.
- the optical node device of the present invention comprises: a unit for detecting a deterioration state of an optical signal of an upstream optical path arriving at the node; and a self-uplink when a detection result of the detecting unit detects signal deterioration. It has means for recognizing that it is both a 3R destination node in the optical path and a 3R source node in the next 3R section, and means for updating 3R section information held by itself based on the recognition result.
- each optical node device sets an appropriate 3R section while actually measuring in the optical path setting process or the optical signal switching connection process, Further, 3R section information can be updated.
- the optical node device of the present invention is an optical node device that generates 3R section information on a route from a source node to a destination node, and when the self node is the source node, the route to the destination node is There is a means to set an optical path one hop at a time in order from the adjacent optical node device of the next hop to the included other optical node devices, and if the optical path is set to itself when it is not the source node Means for transmitting a test optical signal to the upstream optical path, receiving the test optical signal when the node is an originating node and transmitting a report on the deterioration status of the test optical signal to the test optical signal
- the optical node device that transmits the test optical signal when the degradation state of the test optical signal based on the notification satisfies a predetermined degradation condition, indicates that the optical node device is the 3R emitting node in the upstream optical path and A means is provided for recognizing that it is the 3
- the optical device for a test is an optical device
- an optical path is sequentially set for each of the other optical node devices included in the path from itself to the destination node in order from the next hop adjacent optical node device one hop at a time.
- a means for notifying the source of the test optical signal of a report of the deterioration status of the test optical signal is provided.
- the optical node device of the present invention when the optical path is a bidirectional optical path, 3R section information can be generated while actually setting the optical path, so it is necessary to generate 3R section information in advance. Therefore, the processing load required for generating the 3R section information can be reduced.
- the optical node device of the present invention when the optical node device of the present invention is the originating node, the optical node device in the order of the next hop from the adjacent optical node device on the next hop to the other optical node devices included in the measured link targeted for 3R section information measurement.
- Means for sequentially setting up a test upstream optical path one hop at a time, and the optical node device in which the test upstream optical path is set transmits a test optical signal to the test upper optical path.
- the optical node device that transmits the test optical signal based on the notification, ⁇ if the degradation state of the test optical signal satisfies a predetermined degradation condition, the optical node device itself transmits the 3R signal in the upper optical path.
- test upper optical path is sequentially set one hop at a time from the next optical node device adjacent to the next hop, and A means is provided for receiving the signal and notifying the source of the test optical signal of a report of the deterioration state of the test optical signal.
- the 3R section information can be generated by the same procedure as when actually setting the optical path. It is possible to generate highly accurate 3R section information.
- the own optical node device becomes the source node and can hold the 3R section information when setting the optical path.
- each optical node device can share 3R section information generated by itself and others. According to this, not only the case where the own optical node device becomes the source node but also the 3R section information when the other optical node device becomes the source node can be held. When it becomes a node, it can determine for itself whether or not its own optical node device should perform 3R relay. Therefore, the processing load of the optical node device serving as the source node making a 3R relay request to the optical node device performing 3R relay can be omitted.
- the network control device can hold the 3R section information of the entire optical network. Therefore, the optical node device can request and acquire the 3R section information from the network control device as needed, so that the optical node device does not need to have a large-capacity storage device such as a database.
- each optical node device does not need to advertise its generated 3R section information to a large number of other optical node devices, and merely generates its own 3R section information only for the network control device. , And the processing load required for advertisement can be reduced.
- the network control device transmits the
- Means are provided for receiving the information of the 3R destination node or the 3R originating node and updating the held information of the 3R section.
- the optical node device of the present invention comprises: means for holding a value q predetermined for each link based on optical signal deterioration characteristics in a link between itself and an adjacent node; Is added to the adjacent optical node equipment of the next hop.
- the amount of information held by each optical node device is only the value of q relating to itself and the initial value p to be transmitted to the adjacent optical node device when the device is the source node. Can generate 3R section information.
- the processing load required for advertisements and the like can be reduced because it is possible to autonomously determine whether or not to require 3R relaying with the setting of the optical path.
- it is not necessary to measure the deterioration state of the optical signal, and the speed of setting the optical path can be increased.
- a fifteenth aspect of the present invention is an optical network including the optical node device, the maintenance person device, or the network control device of the present invention.
- a sixteenth aspect of the present invention is a method for generating 3R section information on a route from a source node to a destination node, wherein the source node and the optical node device included in the route to the destination node are A first step of transmitting a test light and a signal from the optical node device serving as the source node each time an optical path is set up one hop at a time from the adjacent optical node device next to the next optical node device; According to the first step, the optical node devices included in the route to the destination node are sequentially tested one hop at a time from the next optical node device next to the optical node device serving as the source node.
- the second optical node device serving as the source node receives a report of the deterioration status of the test optical signal from the farthest end optical node device that has received the test optical signal. Steps and this second step Of the optical test signal based on the reported results received re-by the-flops
- the optical node device serving as the source node is connected to the 3R destination optical node device with respect to the optical node device corresponding to the immediately preceding hop of the farthest end optical node device.
- the optical node device When the degradation state of the optical node device satisfies a predetermined degradation condition, the optical node device is the 3R destination node with respect to the optical node device corresponding to the immediately preceding hop of the farthest end optical node device, and the next 3 And the sixth step of notifying that the node is the 3R originating node in the R section.
- the method of generating 3R section information of the present invention includes a method of generating a next hop from an optical node device serving as a 3R source node to an optical node device included in a measured link targeted for 3R section information measurement.
- Receiving the test optical signal A ninth step in which the optical node device serving as the 3R originating node receives a report of the deterioration state of the test optical signal from the farthest end optical node device, and the report received in the ninth step.
- the 3R destination node is set to the optical node device corresponding to the previous hop of the farthest end optical node device as the 3R destination node.
- each optical node device holds a value Q predetermined for each link based on the optical signal deterioration characteristics of the link between itself and the adjacent node
- the optical node device which is the source node, transmits the initial value P of the subtracted value to the adjacent optical node device of the next hop, and each optical node device has its own adjacent optical node of the previous hop.
- calculate (P--Q) or ( ⁇ '-Q) When receiving the initial value P or the subtracted value P 'already subtracted from the initial value P from the device, calculate (P--Q) or ( ⁇ '-Q), and If the calculated result is larger than the threshold value, the calculated result is transmitted to the adjacent optical node device at the next hop.
- the device When the device is a 3R originating node, it is recognized as a 3R destination node.
- the self is recognized as a 3R destination node and the subtracted value is not the destination node of the transmitted optical path, the self is set as the 3R source node and the initial value of the subtracted value ⁇ is set as the next hop contact light. Transmit to the node device.
- the description of the 3R section information generation method of the present invention so far assumes a downstream optical path in a unidirectional optical path or a bidirectional optical path. Next, a description will be given assuming an upstream optical path in the bidirectional optical path.
- the optical node device serving as the source node is set in order from the next hop adjacent optical node device to the other optical node devices included in the path to the destination node.
- a thirteenth step in which the optical node device, which is the source node, receives the test optical signal and notifies the source of the test optical signal of a report on the deterioration status of the test optical signal.
- the optical node device that transmits the test optical signal determines that the degradation state of the test optical signal based on the notification satisfies a predetermined degradation condition, the optical node device itself is the 3R source node in the upstream optical path, and Recognize that it is a 3R arrival node in 3R section An optical node device that recognizes that it is the 3R source node in the upstream optical path and that it is the 3R destination node in the previous 3R section arrives at the fourteenth step.
- An optical path is set for each of the other optical node devices included in the route to the node in order from the adjacent optical node device of the next hop one by one in order, and And receiving a report of the deterioration status of the test optical signal to the source of the test optical signal.
- the method for generating 3R section information may be configured such that the optical node device as the source node is a next hop adjacent optical node device with respect to the other optical node devices included in the link to be measured as the 3R section information measurement target.
- a seventeenth step of transmitting a test optical signal, and an optical node device as a source receives the test optical signal and reports a deterioration state of the test optical signal to the test optical signal.
- a nineteenth step of recognizing that both nodes are 3R destination nodes in the previous 3R section, and that the self is both a 3R source node in the upstream optical path and a 3R destination node in the previous 3R section The upstream optical path for the test, in order from the next hop adjacent optical node device to the other optical node devices included in the link under measurement, for which the selected optical node device is the 3R section information measurement target
- each optical node device holds a value q previously determined for each link based on an optical signal deterioration characteristic in a link between itself and an adjacent node
- the optical node device which is the source node, transmits the initial value p of the value to be added to the adjacent optical node device of the next hop, and each optical node device has its own adjacent optical node of the previous hop.
- calculate (p + q) or ( ⁇ ' + q) calculate (p + q) or ( ⁇ ' + q), and If the calculated result is smaller than the threshold, the operation result is transmitted to the adjacent optical node device of the next hop.
- 3R source node when the node device is a 3R destination node in the upstream optical path It recognizes that recognizes that itself is the 3 R Hatsunoichido in the upper re light path, when the augend value is not the destination node of the transmitted light path Then, it transmits itself as the 3R destination node in the upstream optical path and transmits the initial value p of the augmented value to the adjacent optical node device of the next hop.
- FIG. 1 is a diagram for explaining the notation of a 3R originating node, a 3R destination node, and a 3R section.
- FIG. 2 is a diagram for explaining the properties of the 3R section.
- FIG. 3 is a diagram showing an example of 3R section information corresponding to the topology information of the optical network.
- FIG. 4 is a block diagram of a main part of the optical node device according to the first, third, fifth, sixth and twelve to sixteenth embodiments. '
- FIG. 5 is a diagram showing an optical path set in the optical network and a 3R section.
- FIG. 6 is a block diagram of the 3R relay execution determination unit.
- FIG. 7 is a diagram for explaining the operation of the 3R implementation simulation unit.
- FIG. 8 is a diagram showing a signaling procedure when setting an optical path in the first embodiment.
- FIG. 9 is a diagram showing an optical path set in an optical network and a 3R section.
- FIG. 10 is a diagram showing a signaling procedure when setting an optical path in the first embodiment.
- FIG. 11 is a block diagram of a main part of the optical node device of the second embodiment.
- FIG. 12 is a diagram showing a signaling procedure when setting an optical path in the second embodiment.
- FIG. 13 is a diagram showing a signaling procedure when setting an optical path in the second embodiment.
- FIG. 14 is a diagram showing 3R section information of the third and fourth embodiments.
- FIG. 15 is a diagram showing an optical path set in the optical network and a 3R section.
- FIG. 16 is a diagram showing a signaling procedure when setting an optical path in the third embodiment.
- FIG. 17 is a diagram showing a signaling procedure when setting an optical path in the fourth embodiment.
- FIG. 18 is a diagram showing optical paths and 3R sections set in the optical network.
- FIG. 19 is a diagram showing a signaling procedure when setting an optical path in the third embodiment.
- FIG. 20 is a diagram illustrating a signaling procedure when setting an optical path in the fourth embodiment.
- FIG. 21 is a diagram showing 3R section information in the optical node device of the fifth embodiment.
- FIG. 22 is a diagram showing 3R section information in the optical node device of the fifth embodiment.
- FIG. 23 is a diagram showing a signaling procedure when setting an optical path in the fifth embodiment.
- FIG. 24 is a diagram showing 3R section information in the optical node device of the fifth embodiment.
- FIG. 25 is a diagram showing 3R section information in the optical node device of the fifth embodiment.
- FIG. 26 is a diagram showing a signaling procedure at the time of setting an optical path in the fifth embodiment.
- FIG. 27 is a diagram illustrating 3R section information in the optical node device according to the sixth embodiment.
- FIG. 28 is a diagram illustrating 3R section information in the optical node device according to the sixth embodiment.
- FIG. 29 is a diagram illustrating 3R section information in the optical node device of the sixth embodiment.
- FIG. 30 is a diagram illustrating 3R section information in the optical node device according to the sixth embodiment.
- FIG. 31 is a diagram showing a signaling procedure when setting an optical path in the sixth embodiment.
- FIG. 32 is a diagram showing 3R section information in the optical node device of the sixth embodiment.
- FIG. 33 is a diagram showing 3R section information in the optical node device of the sixth embodiment.
- FIG. 34 is a diagram showing 3R section information in the optical node device of the sixth embodiment.
- FIG. 35 is a diagram showing 3R section information in the optical node device of the sixth embodiment.
- FIG. 36 is a diagram illustrating a signaling procedure at the time of setting an optical path in the sixth embodiment.
- FIG. 37 is a conceptual diagram showing the relationship between the network control device and the optical node device according to the seventh and eighth embodiments.
- FIG. 38 is a block diagram of a network control device according to the seventh and eighth embodiments.
- FIG. 39 is a block diagram of a main part of the optical node device according to the seventh embodiment.
- FIG. 40 is a sequence diagram showing the operation of the seventh embodiment.
- FIG. 41 is a block diagram of a main part of an optical node device according to an eighth embodiment. .
- FIG. 42 is a sequence diagram showing the operation of the eighth embodiment.
- FIG. 43 is a block diagram of a main part of the optical node device of the ninth embodiment.
- FIG. 44 is a block diagram of a main part of the optical node device according to the tenth embodiment.
- FIG. 45 is a block diagram of a main part block of the optical node device according to the eleventh embodiment.
- FIG. 46 is a diagram for explaining the 3R relay execution node determination method of the 12th embodiment.
- FIG. 47 is a diagram for explaining the 3R relay execution node determination method of the thirteenth to sixteenth embodiments.
- FIG. 48 is a diagram for explaining the operation of the optical node devices of the thirteenth and fourteenth embodiments.
- FIG. 49 is a diagram for explaining the operation of the optical node device according to the fifteenth and sixteenth embodiments.
- FIG. 50 is a diagram for explaining the main block configuration and operation of the optical / drive device of the seventeenth embodiment.
- FIG. 51 is a block diagram of the actual measurement unit.
- FIG. 52 is a diagram for describing the main block configuration and operation of the optical node device according to the seventeenth embodiment.
- FIG. 53 is a block diagram of an optical node device having an optical switch unit on the output side in the eighteenth embodiment.
- FIG. 54 is a block diagram of an optical node device having an optical switch unit on the input side according to the eighteenth embodiment.
- FIG. 55 is a block diagram of an optical node device having a trunk type 3R relay unit according to the eighteenth embodiment.
- FIG. 56 is a diagram showing the concept of 3R section information collection in the optical node device of the ninth embodiment.
- FIG. 57 is a diagram showing a 3R section information collection procedure in the optical node device according to the nineteenth embodiment.
- FIG. 58 is a view showing the concept of 3R section information collection in the optical node device of the ninth embodiment.
- FIG. 59 is a diagram showing a 3R section information collection procedure in the optical node device of the ninth embodiment.
- FIG. 60 is a diagram showing a concept of 3R section information collection in the optical node devices of the 20th and 29th embodiments.
- FIG. 61 is a block diagram of the optical node device of the 20th and 29th embodiments.
- FIG. 62 is a diagram showing the concept of 3R section information collection in the optical node devices of the 20th and 29th embodiments.
- FIG. 63 is a block diagram of an optical node device according to the 20th and 29th embodiments.
- FIG. 64 is a diagram showing the relationship between the network controller of the 21st embodiment and the optical network.
- FIG. 65 is a block diagram of the network controller of the 21st embodiment.
- FIG. 66 is a block diagram of the maintenance person device of the second party example.
- FIG. 67 is a block diagram of the network controller of the twenty-second embodiment.
- FIG. 68 is a diagram for explaining an optical node device that performs actual measurement based on an instruction from the network control device of the twenty-second embodiment.
- FIG. 69 is a block diagram of the network control device of the twenty-second embodiment.
- FIG. 70 is a diagram for explaining an optical node device that performs actual measurement based on an instruction from the network control device of the twenty-second embodiment.
- FIG. 71 is a block diagram of a main part of the network control device of the 23rd embodiment.
- FIG. 72 is a diagram for explaining collection of traffic demand information in the network control devices of the second and fourth embodiments.
- FIG. 73 is a block diagram of a main part of the network control device of the twenty-fourth embodiment.
- FIG. 74 explains the block configuration and operation of the main part of the optical node device of the twenty-fifth embodiment.
- FIG. 75 is a diagram for explaining the main block configuration and operation of the optical node device according to the twenty-fifth embodiment.
- FIG. 76 is a block diagram of a block diagram of an optical node device having an optical switch section on the output side according to the 26th embodiment.
- FIG. 77 is a block diagram of an optical node device having an optical switch unit on the input side according to the 26th embodiment.
- FIG. 78 is a block diagram of the optical node device having the trunk type 3R relay unit of the 26th embodiment.
- FIG. 79 is a diagram showing the concept of 3R section information collection in the optical node device of the twenty-seventh embodiment.
- FIG. 80 is a diagram showing a 3R section information collection procedure in the optical node device according to the twenty-seventh embodiment.
- FIG. 81 is a diagram showing the concept of 3R section information collection in the optical node device of the twenty-seventh embodiment.
- FIG. 82 is a diagram showing a 3R section information collection procedure in the optical node device of the twenty-seventh embodiment.
- FIG. 83 is a diagram showing the concept of collecting information between 3 REs in the optical / wired device of the 28th embodiment.
- FIG. 84 is a diagram showing a 3R section information collection procedure in the optical node device of the twenty-eighth embodiment.
- FIG. 85 is a diagram showing the concept of 3R section information collection in the optical node device of the twenty-eighth embodiment.
- FIG. 86 is a diagram showing a procedure for collecting 3R section information in the optical node device according to the twenty-eighth embodiment.
- FIG. 87 is a diagram showing a conventional optical network configuration. BEST MODE FOR CARRYING OUT THE INVENTION
- FIG. 1 is a diagram for explaining the notation of a 3R originating node, a 3R destination node, and a 3R section.
- Figure 2 is a diagram for explaining the properties of the 3R section.
- FIG. 3 is a diagram showing an example of 3R section information corresponding to topology information of an optical network. As shown in FIG. 1, in each embodiment of the present invention, a 3R originating node is represented by a black circle and a 3R destination node is represented by a hatched circle.
- the 3R section is between the optical node devices 2 and 5, but all the optical node devices 2, 3, 4, and 5 included in the interval are not necessarily 3R sections. The reason is that the capabilities of the light emitting element and the light receiving element of each optical node device are not always the same.
- the element can output only an optical signal intensity that is less than half that of the light emitting element of the optical node device 2, the distance between the optical node devices 3 and 5 is not necessarily between 3 REs.
- the light receiving element of the optical node device 4 has only less than half the light receiving sensitivity as compared with the light receiving element of the optical node device 5, the distance between the optical node devices 2 and 4 is not necessarily 3R section. No.
- the same light emitting element or light receiving element is not necessarily used for upstream and downstream, and the optical signal intensity Also, the light receiving sensitivity may be different, and it does not necessarily fall in the 3R section. Therefore, as shown in FIG. 2, the notation of the 3R section may be partially or entirely overlapped with other 3R sections.
- the 3R section information set in this way is represented corresponding to the topology information of the optical network, as shown in FIG.
- the optical node devices 1, 3, 11, and 13 are designated as 3R originating nodes.
- the designation of the 3R originating node is performed by an optical network administrator. For example, when traffic demand is high.
- the source node of many optical paths is designated as the 3R source node.
- the one-hop section between adjacent optical node devices obviously functions as a 3R section.
- a section between a 3R source node and a 3R destination node specified in advance is set as a 3R section. I do.
- the source node and destination node can be connected at the same wavelength, wavelength conversion becomes unnecessary, and wavelength conversion resources can be used most effectively.
- the wavelength usage is the same as the wavelength usage of the entire optical network. Therefore, there is no choice but to determine an optical node device that performs wavelength conversion according to the available wavelength at the time of the optical path setting request.
- the optical node device should be a 3R originating node.
- the case where the optical node device that always needs wavelength conversion is known in advance is, for example, the content of the wavelength conversion resource of a certain optical node device differs from the content of the wavelength conversion resource of the previous hop optical node device. There are cases, for example, where it is impossible to set an optical path at the same wavelength due to hardware.
- FIG. 4 is a block diagram of a main part of the optical node device of the first embodiment.
- FIGS. 5 and 9 are diagrams showing optical paths and 3R sections set in the optical network.
- FIG. 6 is a block diagram of the 3R relay execution determination unit 21.
- FIG. 7 is a diagram for explaining the operation of the 3R implementation simulation unit.
- FIG. 8 and FIG. 10 are diagrams showing a signaling procedure when setting an optical path in the first embodiment.
- the optical node device holds 3R section information holding unit 20 that holds 3R section information corresponding to the topology information of the optical network to which the optical node device belongs as shown in FIG.
- the optical node that performs 3R relaying 3 R relay execution determination unit 21 that autonomously determines whether or not the device is a mobile device.
- each optical node device autonomously determines whether or not itself is a 3R relay execution node, each optical node device needs to hold 3R section information.
- each optical node device since it is not necessary for even optical node devices that are not involved in the optical path setting to retain the 3R section information, only the optical node devices on the path involved in the optical path setting need to retain the 3R section information. For example, information storage resources can be used effectively.
- the 3R relay execution determining unit 21 of the optical node device 1 refers to the 3R section information holding unit 20 to know which part of the topology of the optical network the optical node device 1 is. As a result, the optical node device 1 recognizes that it is the source node of the optical path to be set up, and determines that the optical node device 1 performs 3R relay.
- the optical path setting unit 22 of the optical node device 1 secures the resources for the optical path setting and the 3R relay according to the judgment of the 3R relay execution determining unit 21 and, as shown in FIG.
- the message that the DITR (Downstream Ingress Three R) 1 indicating that the optical node device 1 is a 3RS node is set in the optical path. Mount on request.
- the optical path setting unit 22 of the optical node device 2 that has received the optical path setting request (Path) from the optical node device 1 determines whether or not the optical node device 2 is an optical node device that performs 3R relay.
- the 3R relay execution determination unit 21 is inquired about whether this is the case.
- the 3R relay execution determination unit 21 of the optical node device 2 refers to the 3R section information held in the 3R section information holding unit 20.
- the optical path setting unit 22 of the optical node device 3 having received the optical path setting request (P ath) from the optical node device 2 is an optical node device in which the optical node device 3 performs 3R relay.
- the 3R relay execution determination unit 21 is inquired about whether or not this is the case.
- the 3R relay execution determination unit 21 of the optical node device 3 refers to the 3R section information held in the 3R section information holding unit 20 and the optical node device 3 determines whether the optical node devices 3 to 14 Since it is a 3R originating node in the 3R section, 3R relaying may be performed. Alternatively, since it is not a 3R originating node in the 3R section from optical node device 1 to optical node device 3, 3R relaying is performed. It is recognized that the optical signal may be transmitted as it is to the optical node device 4 which is the 3R destination node without performing the relay.
- the 3R relay execution determination unit 21 of the optical node device 3 uses the 3R execution simulation unit 23 and the comparison unit 24 shown in FIG.
- the number of 3R executions is compared in both the case where the optical node device 3 functions as the 3R originating node and the case where the optical node device 3 does not function. That is, as shown in FIG. 7, the 3R implementation simulation unit 23 sets the interval between 3 REs in each case where the optical node device 3 performs the 2R relay II and when the optical node device 3 does not perform the 3R relay. .
- the optical node device 4 becomes the 3R destination node.
- the 3R implementation simulation unit 23 simulates the determination of the 3, R relay implementation determination unit 21 of the optical node device 4.
- the decision policy of the 3R relay execution decision unit 21 of the optical node device 4 is that the self is an optical node device corresponding to the 3R destination node.
- the optical node device at the hop destination is set as the 3R destination node, and it is determined that the optical node device itself performs the 3R relay.
- the 3R relay execution determination unit 21 of the optical node device 4 determines that it is a 3R destination node. Since this is an optical node device that is not a destination node, it is an optical node device that performs its own 3R relay with itself as the 3R originating node and the next hop destination optical node device 5 as the 3R destination node. Is determined. " Therefore, when the optical node device 4 becomes the 3R destination node, the optical node device 4 makes the 3R destination node the optical node device 4 as the 3R originating node, and the optical node device 4 performs the 3R relay with the next hop destination optical node device 5 as the 3R destination node. Judge to implement.
- the 3R execution simulation unit 23 simulates the judgment of the 3R relay execution determination unit 21 of the optical node device 5.
- the decision policy of the 3R relay execution determination unit 21 of the optical node device 5 is as follows: ⁇ If the node does not belong to any of the 3R sections having 3R originating nodes on the optical path passing through it, The 3R originating node determines that it is the optical node device that performs 3R relay, with its next hop destination optical node device as the 3R destination node. "
- the 3R relay execution determination unit 21 of the optical node device 5 determines that it does not belong to any of the 3R sections having the 3R originating node on the optical path passing through it,
- the 3R originating node determines that it is the optical node device that implements 3R relay by setting its own next hop destination optical node device 14 as the 3R destination node.
- the optical node device 5 performs the 3R relay by setting the optical node device 5 as the 3R originating node and the optical node device 14 at the next hop destination of the optical node device 5 as the 3R destination node. I understand. Therefore, the number of 3R implementations is two.
- the simulation result of the 3R execution simulation section 23 is input to the comparison section 24.
- the comparing unit 24 knows that the number of times the 3R relay is performed can be reduced when the optical node device 3 performs the 3R relay as compared with the case where the optical node device 3 does not perform the 3R relay, and outputs that effect as a comparison result.
- the 3R relay execution determination unit 21 selects the one with the smaller number of 3R implementations as the comparison result. Therefore, it is determined that the optical node device 3 performs the 3R relay.
- such a simulation is based on the fact that, for a plurality of different 3R sections including overlapping portions on the optical path passing through one optical node apparatus, the one optical node apparatus is assigned to one of the 3R sections. This is the 3R origin node in, and will be performed when it does not correspond to the 3R origin node or 3R destination node in other 3R sections. This is the same in other embodiments.
- the optical path setting unit 22 of the optical node device 3 secures the resources for the optical path setting and the 3R relay based on the judgment of the 3R relay execution determining unit 21, and as shown in FIG.
- the optical path setting unit 22 of the optical node device 4 that has received the optical path setting request (Path) from the optical node device 3 is an optical node device that implements the optical node device 4 power ⁇ 3R relay.
- the 3R relay execution determination unit 21 is inquired about whether or not this is the case.
- the optical path setting unit 22 of the optical node device 4 secures resources for setting the optical path in response to the judgment of the 3R relay execution determining unit 21, and as shown in FIG.
- DI TR 3 from the optical node device 3 is directly included in the optical path setting request.
- the optical path setting unit 22 of the optical node device 5 that has received the optical path setting request (Path) from the optical node device 4 determines whether or not the optical node device 5 is an optical node device that performs 3R relay. To the 3R relay execution judgment unit 21.
- the optical path setting unit 22 of the optical node device 14 having received the optical path setting request (P ath) from the optical node device 5 determines whether or not the optical node device 14 is an optical node device that performs 3R relay. It inquires of the 3R relay execution judgment unit 21 about this.
- the 3R relay execution determination unit 21 of the optical node device 14 refers to the 3R section information stored in the 3R section information storage unit 20, and since the optical node device 14 is the destination node, it is not necessary to perform 3R relay. Judge not.
- the optical path setting unit 22 of the optical node device 14 secures resources for path setting in response to the judgment of the 3R relay execution determining unit 21 and, as shown in FIG. Sends optical path setup completion notification (Resv).
- the optical path setting completion notification (Resv) is transmitted as optical node device 5 ⁇ 4 ⁇ 3 ⁇ > 2 ⁇ 1, and the setting of the optical path is completed.
- each of the optical node devices 1, 2, 3, 4.5, and 14 autonomously determines whether or not to carry out 3R relay in the process of executing the signaling procedure for setting the optical path. can do.
- the 3R relay II application determination unit 21 of the optical node device 1 refers to the 3R section information holding unit 20 to know which part of the topology of the optical network the optical node device 1 is. . As a result, it recognizes that the optical node device 1 is the source node of the optical path to be set up, and determines that the optical node device 1 performs 3R relay.
- the optical path setting unit 22 of the optical node device 1 secures resources for the optical path setting and the 3R relay according to the judgment of the 3R relay execution determining unit 21, and as shown in FIG.
- the optical node device that has received the optical path setting request (Path) from the optical node device 1 inquires the 3R relay execution determination unit 21 whether the optical node device 10 is an optical node device that performs 3R relay.
- the optical path setting unit 22 of the optical node device 10 secures a resource for setting the optical path in response to the judgment of the 3R relay execution determining unit 21 and, as shown in FIG.
- DI TR 1 from the optical node device 1 is directly included in the optical path setting request.
- the optical path setting unit 22 of the optical node device 11 receiving the optical path setting request (P ath) from the optical node device 10 determines whether the optical node device 11 is an optical node device that performs 3R relay.
- the 3R relay execution determination unit 21 is inquired about whether or not it is.
- the 3R relay execution determination unit 21 of the optical node device 11 refers to the 3R section information held in the 3R section information holding unit 20, and the optical node device 11 determines whether the optical node devices 11 to 13 Since it is a 3R originating node in the 3R section, it is determined that 3R relay will be performed.
- the optical path setting unit 22 of the optical node device 11 receives the determination of the 3R relay execution determination unit 21 and secures resources for optical path setting and 3R relay, and as shown in FIG.
- the optical path setting unit 22 of the optical node device 12 that has received the optical path setting request (Path) from the optical node device 11 is an optical node device in which the optical node device 12 performs 3R relay.
- the 3R relay execution determination unit 21 is inquired about whether or not this is the case.
- the 3R relay execution determining unit 21 of the optical node device 1 2 refers to the 3R section information held in the 3R section information holding unit 20, and the optical node device 1 2 is neither a 3R source node nor a 3R destination node. It is determined that there is no need to carry out 3R relay.
- the optical path setting unit 22 of the optical node device 13 that has received the optical path setting request (Path) from the optical node device 12 is an optical node device in which the optical node device 13 performs 3R relay.
- the 3R relay execution determination unit 21 is inquired about whether or not it is.
- the 3R relay execution determination unit 21 of the optical node device 13 refers to the 3R section information held in the 3R section information holding unit 20, and the optical node device 13 is a 3R source node, and performs 3R relay. Judge to implement.
- the optical path setting unit 22 of the optical node device 13 receives the judgment of the 3R relay execution determining unit 21 and secures the resources for the optical path setting and the 3R relay, and as shown in FIG.
- the optical path setting unit 22 of the optical node device 14 that has received the optical path setting request (Path) from the optical node device 13 is an optical node device in which the optical / node device 1.4 implements a 3R route.
- the 3R relay execution determination unit 21 is inquired whether there is any.
- the 3R relay execution determination unit 21 of the optical node device 14 refers to the 3R section information stored in the 3R section information storage unit 20, and since the optical node device 14 is the destination node, there is no need to perform 3R relay. to decide.
- the optical path setting unit 22 of the optical node device 14 secures resources for path setting in response to the judgment of the 3R relay execution determining unit 21, and as shown in FIG. Sends optical path setup completion notification (Resv).
- the optical path setting completion notification (Resv) is transmitted to the optical node device 13-1—2—1—1—10 ⁇ 1 to complete the setting of the optical path.
- each optical node device 1, 10, 10, 11, 12, 13, 14 autonomously performs the 3R relay in the process of executing the signaling procedure for setting the optical path. Can be determined.
- FIG. 11 is a block diagram of a main part of the optical node device of the second embodiment.
- FIGS. 12 and 13 are diagrams showing a signaling procedure when setting an optical path in the second embodiment.
- the optical node device includes a 3R section information holding unit 20 that holds 3R section information corresponding to the topology information of the optical network to which it belongs, and a 3R section information holding unit 20 Other optical node device that performs 3R relay among other optical node devices that the optical path from itself to the destination node passes when it is the source node with reference to the 3R section information held in 3R relay node specifying unit 25 that specifies the R, and 3R relay for the optical path that is the source node for the other optical node device specified by the 3R relay node specifying unit 25.
- 3 R relay execution requesting unit 26 for requesting the execution of
- the optical node device corresponding to the source node since the optical node device corresponding to the source node specifies the 3R relay execution node, the optical node device corresponding to the source node holds the 3R section information for the moment. As in the first embodiment, it is not necessary for all the optical node devices or a plurality of optical node devices related to the optical path setting to hold the 3R section information. Therefore, since only the optical node device corresponding to the source node holds the 3R section information, the information storage resources can be effectively used.
- the 3R section information holding unit 20 holds the 3R section information shown in FIG.
- the optical path setting section 22 of the optical node device 1 uses the optical node device 1 as a source node and the optical node device 14 as a destination node. From now on, as shown in FIG. We are trying to set the optical path (double line).
- the optical path setting unit 22 requests the 3R relay execution node specifying unit 25 to specify an optical node device that performs 3R relay other than the own optical node device 1.
- the optical node device 2 is not the 3R originating node, and the optical node device 2 implements 3R relay since the optical node device 1 implements 3R relay. It is determined that relaying will not be performed.
- the optical node device 3 since it is a 3R originating node in the 3R section from the optical node devices 3 to 14, 3R relay may be performed, or the 3R relay from the optical node device 1 to the optical node device 4 may be performed.
- the optical signal since the signal is not a 3R emission node, the optical signal may be transmitted as it is to the optical node device 4 which is a 3R destination node without performing the 3R relay.
- the 3R relay execution node specifying unit 25 uses the 3R execution simulation unit 23 and the comparison unit 24 shown in FIG. With regard to the above, the number of times 3R is performed is compared both in the case where the optical node device 3 functions as the 3R originating node and in the case where it does not function. The following description is the same as in the first embodiment.
- the simulation result of the 3R execution simulation unit 23 is input to the comparison unit 24.
- the comparison unit 24 knows that when the optical node device 3 implements the 3R relay, the number of 3Rs can be reduced as compared with the case where the optical node device 3 does not perform the 3R relay, and outputs that effect as a comparison result.
- the 3R relay execution node specifying unit 25 selects the one with the smaller number of 3R executions as the comparison result. Therefore, it is determined that the optical node device 3 performs the 3R relay.
- optical node device 4 Since the optical node device 4 is a 3R destination node, it is determined that 3R relay is not performed. Since the optical node device 5 is not a 3R3 ⁇ 4 node, it is determined that 3R relay is not performed. Since the optical node device 14 is a destination node, it is determined that 3R relay will not be performed.
- the optical node device 4 Upon receiving the optical path setting request (P ath) from the optical node device 3, the optical node device 4 secures resources for setting the optical path, and requests the optical node device 5 to set an optical path (P ath). Is sent.
- the optical node device 5 that has received the optical path setting request (Path) from the optical node device 4 secures resources for setting the optical path, and issues an optical path setting request (P ath) to the optical node device 14.
- the optical node device 14 that has received the optical path setting request (P ath) from the optical node device 5 secures resources for setting the optical path, and notifies the optical node device 5 of the completion of the optical path setting (Re sv ) Is sent.
- the optical path setting completion notification (Res v) is transmitted to the optical node device 5 ⁇ 4 ⁇ 3 ⁇ 2 ⁇ 1 to complete the optical path setting.
- the 3R section information holding unit 20 holds the 3R section information shown in FIG.
- the optical path setting unit 22 of the optical node device 1 uses the optical node device 1 as a source node and the optical node device 14 as a destination node. From now on, the optical paths from the optical node devices 1 to 14 as shown in FIG. (Overlapping line).
- the optical path setting unit 22 requests the 3R relay implementation node identification unit 25 to identify an optical node device that implements 3R relay other than the own optical node device 1.
- the optical node device 10 is not the 3R originating node, and determines that the optical node device 10 does not perform the 3R relay because the optical node device 1 performs the 3R relay. Since the optical node device 11 is a 3R originating node in the 3R section from the optical node devices 11 to 13, it is determined that 3R relay will be performed. Since the optical node device 12 is not a 3R originating node, it is determined that 3R relay will not be performed. Since the optical node device 13 is a 3R originating node in the 3R section from the optical node devices 13 to 14, it is determined that 3R relay will be performed.
- Optical node device that has received the optical path setting request (Pa t h) from optical node device 1
- the optical node device 14 Upon receiving the optical path setting request (P sth) from the optical node device 13, the optical node device 14 secures resources for setting the optical path and notifies the optical node device 13 of the completion of the optical path setting ( Res sv).
- the optical path setting completion notification (Resv) is transmitted to the optical node devices 13 ⁇ 12 ⁇ 11 ⁇ 10 ⁇ 1 to complete the optical path setting.
- the optical node serving as the source node is transmitted. Since the node device specifies an optical node device that performs 3R communication on the optical path to the destination node, other optical node devices on the optical path simply follow the instruction from the source node. Well, the calculation load can be reduced.
- Optical node devices other than the optical node device serving as the source node do not need to hold the 3R section information, and can effectively use information storage resources.
- FIG. 14 is a diagram showing 3R section information of the third embodiment.
- FIGS. 15 and 18 are diagrams showing optical paths set in the optical network and 3R sections.
- FIG. 16 and FIG. 19 are diagrams showing a signaling procedure when setting an optical path in the third embodiment.
- an optical node device that performs 3R relay in a bidirectional optical path
- the optical node device according to the third embodiment will be described as a configuration shown in FIG.
- the configuration shown in FIG. 4 is a configuration in which each optical node device holds the same 3R section information and autonomously determines whether or not to implement 3R relay.
- the 3R section information holding unit 20 holds 3R section information shown in FIG.
- each optical node device autonomously determines whether or not itself is a 3R relay execution node. It is necessary to hold R section information. However, since it is not necessary for even optical node devices that are not involved in the optical path setting to hold the 3R section information, only the optical node devices on the path involved in the optical path setting need to hold the 3R section information. Can effectively use information storage resources
- the 3R relay execution determining unit 21 of the optical node device 1 refers to the 3R section information holding unit 20 to know which part of the topology of the optical network the optical node device 1 is. I do.
- the optical node device 1 recognizes that it is the source node of the bidirectional optical path to be set and the 3R source node of the downstream optical path, and the optical node device 1 determines that We judge that we plan R relay.
- the optical path setting unit 22 of the optical node device 1 receives the judgment of the 3R relay execution determination unit 21 and secures resources for setting the downstream optical path and 3R relay, and as shown in FIG.
- an optical path setting request (Path) When transmitting an optical path setting request (Path) to the optical node device 2, it indicates that the optical node device 1 is an optical node device that performs 3R relay in the lower optical path.
- the 3R relay execution determination unit 21 refers to the 3R section information storage unit 20 and recognizes that the optical node device 1 is the 3R destination node of the upstream optical path to be set up from now on. However, the optical node device 1 determines that 3R relay is not performed on the upstream optical path.
- the optical path setting unit 22 of the optical node device 1 secures resources for setting up the upstream optical path based on the judgment of the 3R relay execution determining unit 21 and, as shown in FIG. Node equipment W
- R) 1 is included in the optical path setup request.
- the optical path setting unit 22 of the optical node device 2 that has received the optical path setting request (Path) from the optical node device 1 performs the 3R relay in the upper or lower optical path by the optical node device 2.
- the 3R relay execution determination unit 21 is inquired whether the device is a device or not.
- the optical path setting unit 22 of the optical node device 2 receives resources from the 3R relay execution determination unit 21 and secures resources for setting the optical path for downstream and upstream, and as shown in FIG.
- the optical path setting unit 22 of the optical node device 3 that has received the optical path setting request (Path) from the optical node device 2 determines whether or not the optical node device 3 is an optical node device that performs 3R relay.
- the 3R relay execution determination unit 21 is inquired about whether this is the case.
- the 3R relay execution determination unit 21 of the optical node device 3 refers to the 3R section information held in the 3R section information holding unit 20, and the optical node device 3 switches from the optical node devices 3 to 14 in the downstream optical path.
- 3R relay may be performed because it is a 3R source node in the 3R section of the above, or it is not a 3R source node in the 3R section from optical node device 1 to optical node device 4 in the downstream optical path Therefore, the 3R relay node is not implemented and the optical node device 4 which is the 3R destination node is It recognizes that the optical signal may be transmitted as it is.
- the 3R relay execution determination unit 21 of the optical node device 3 uses the 3R execution simulation unit 23 and the comparison unit 24 to transmit the optical path from the optical node devices 3 to 14.
- the number of times 3R is performed is compared both in the case where the optical node device 3 functions as the 3R originating node and in the case where it does not function. The following description is the same as in the first embodiment.
- the simulation result of the 3R execution simulation section 23 is input to the comparison section 24.
- the comparison unit 24 indicates that it is possible to reduce the number of 3Rs performed when the optical node device 3 performs the 3R relay in the downstream optical path as compared with the case where the 3R relay is not performed. .
- the 3R relay execution determination unit 21 selects the one with the smaller number of 3R implementations as the comparison result. Therefore, the optical node device 3 determines that the 3R relay is performed in the lower optical path.
- the optical path setting unit 22 of the optical node device 4 receiving the optical path setting request (P ath) from the optical node device 3 determines whether or not the optical node device 4 is an optical node device performing 3R relay. 3 Inquires of the R relay execution decision unit 21.
- the 3R relay execution determination unit 21 of the optical node device 4 refers to the 3R section information held in the 3R section information holding unit 20.
- the optical node device 4 is a 3R destination node in the downstream optical path.
- the optical path setting unit 22 of the optical node device 4 secures the resources for the optical path setting and the 3R relay based on the judgment of the 3R relay execution determining unit 21, and as shown in FIG.
- the optical path setting unit 22 of the optical node device 5 that has received the optical path setting request (Path) from the optical node device 4 determines whether or not the optical node device 5 is an optical node device that performs 3R relay. Inquire to the R relay execution determination unit 21.
- the optical path setting unit 22 of the optical node device 5 secures resources for optical path setting and 3R relaying based on the judgment of the 3R relay execution determining unit 21 and, as shown in FIG.
- the optical node device 5 is a 3R source node in the upstream optical path
- a 3R section in which the optical node device 14 is a 3R source node and the optical node device 5 is a 3R destination node is set.
- the optical path setting unit 22 of the optical node device 14 that has received the optical path setting request (P ath) from the optical node device 5 is an optical node device in which the optical node device 14 performs 3R relay. 3 R relay actual] ⁇ Inquire the judgment unit 21.
- the optical path setting unit 22 of the optical node device 14 receives the judgment of the 3R relay execution determination unit 21 and secures the resources for the optical path setting and the 3R relay, as shown in FIG. Then, an optical path setting completion notification (Resv) is sent to the optical node device 5.
- Resv optical path setting completion notification
- the optical path setting completion notification (Resv) is transmitted to the optical node device 5-4-3-2 ⁇ 1, and the optical path setting is completed.
- each of the optical node devices 1, 2, 3, 4, 5, and 14 autonomously determines whether or not to perform 3R relaying in the process of executing the signaling procedure for optical path setup. can do.
- FIG. 8 As shown in Fig. 8, an example in which a bidirectional optical path (double line portion) from optical node devices 1 to 14 is set will be described.
- the 3R relay execution determining unit 21 of the optical node device 1 refers to the 3R section information holding unit 20 to know which part of the topology of the optical network the optical node device 1 is.
- the optical node device 1 recognizes that it is the source node of the bidirectional optical path to be set and the 3R source node of the downstream optical path, and the optical node device 1 determines that Judge to perform R relay.
- the optical path setting unit 22 of the optical node device 1 secures resources for downlink optical path setting and 3R relaying based on the judgment of the 3R relay execution determining unit 21, and as shown in FIG.
- DI TR 1 indicating that the optical node device 1 is an optical node device that performs 3R relay in the lower optical path.
- the message is included in the optical path setting request.
- the 3R relay execution determination unit 21 refers to the 3R section information storage unit 20, recognizes that the optical node device 1 is the 3R destination node of the upstream optical path to be set up, and determines Node device 1 determines that 3R relay is not performed in the upstream optical path.
- the optical path setting unit 22 of the optical node device 1 secures resources for setting up the upstream optical path ⁇ based on the judgment of the 3R relay execution determining unit 21, and as shown in 9 19,
- the optical path setting unit 22 of the optical node device 10 that has received the optical path setting request (Path) from the optical node device 1 transmits the optical signal for the optical node device 10 to perform 3R relay in the upper or lower optical path. Inquires of the 3R relay execution determination unit 21 whether or not the device is a node device.
- the 3R relay execution determination unit 21 of the optical node device 10 refers to the 3R section information held in the 3R section information holding unit 20 and determines whether the optical node device 10 is a 3R source node in the upstream or downstream optical path.
- DI TR 1
- the optical node device 1 up to the optical node device 11 has 3R.
- the optical node device 10 performs 3R relay Judge not to implement.
- the optical node device 1 Since it is known that the node is a 3R originating node with 1 being the 3R destination node, the optical node device 10 determines that 3R relay is not to be performed on the upstream optical path.
- the optical path setting unit 22 of the optical node device 10 secures resources for setting the downlink and uplink optical paths in response to the judgment of the 3R relay execution determining unit 21, and as shown in FIG.
- the optical path setting unit 22 of the optical node device 11 that has received the optical path setting request (Path) from the optical node device 10 is an optical node device in which the optical node device 11 performs 3R relay.
- the 3R relay execution determination unit 21 is inquired about whether or not it is.
- the 3R relay execution determination unit 21 of the optical node device 11 refers to the 3R section information held in the 3R section information holding unit 20, and the optical node device 11 transmits from the optical node device 11 in the downstream optical path. Since it is a 3R originating node in the 3R section up to 13, it is determined that 3R relay will be performed.
- the optical path setting unit 22 of the optical node device 11 receives the determination of the 3R relay execution determination unit 21 and secures resources for optical path setting and 3R relay, and as shown in FIG.
- DI TR 1 indicating that the optical node device 11 is an optical node device that performs 3R relay in a downstream optical path.
- the message “1” is included in the optical path setting request.
- the optical node device that has received the optical path setup request (Path) from the optical node device 11 inquires the 3R relay execution determination unit 21 whether the optical node device 12 is an optical node device that performs 3R relay.
- the optical node device 12 determines that it is not necessary to perform the 3R relay. Further, the 3R relay execution determination unit 21 refers to the 3R section information held in the 3R section information holding unit 20. Since it is known that the optical node device 12 is a 3R originating node with the optical node device 1 as the 3R destination node in the upstream optical path, it is determined that 3R relay is to be performed in the upstream optical path.
- the optical node device 12 is a 3R originating node in the upper y optical path, and is also a 3R destination node when the optical node device 14 is a 3R originating node in the upstream optical path. Therefore, the UET R2 12 indicating that the optical node device 12 is a 3R destination node is included in the optical path setting request.
- the optical path setting unit 22 of the optical node device 13 that has received the optical path setting request (P ath) from the optical node device 12 is an optical node or device in which the optical node device 13 performs 3R relay.
- the 3R relay execution determination unit 21 is inquired whether there is any.
- the 3R relay execution determining unit 21 of the optical node device 13 refers to the 3R section information held in the 3R section information holding unit 20.
- Self is the 3R destination node in the downstream optical path, and self is the destination node. If the node is not the 3R originating node on the lower optical path, the 3R relay node is set as the 3R originating node with the next hop destination optical node device on the lower optical path as the 3R destination node. The optical node device 13 determines that the optical node device 13 is to perform the 3R relay.
- UETR 12 has arrived, which indicates that the interval between the optical node device 14 and the optical node device 12 is a 3R section. 3 judges that 3R relay will not be performed.
- the optical path setting unit 22 of the optical node device 13 receives the judgment of the 3R relay execution determination unit 21 and secures the resources for the optical path setting and the 3R relay, and as shown in FIG.
- the optical path setting unit 22 of the optical node device 14 determines whether or not the optical node device 14 is an optical node device that performs 3R relay. To the 3R relay execution judgment unit 21.
- the 3R relay execution determination unit 21 of the optical node device 14 refers to the 3R section information held in the 3R section information holding unit 20, and performs the 3R relay on the downstream optical path since the optical node device 14 is the destination node.
- UETR 1 2 has arrived from the optical node device 13, and the optical node device 14 is the 3R originating node, and the optical node device 12 is the 3R destination node. Judge that it is necessary to perform R relay.
- the optical path setting unit 22 of the optical node device 14 receives the judgment of the 3R relay execution determination unit 21 and secures the resources for the optical path setting and the 3R relay, and as shown in FIG. An optical path setting completion notification (Res V) is sent to the optical node device 13.
- the optical path setting completion notification (Res V) is transmitted to the optical node devices 13 ⁇ 12 ⁇ 11 ⁇ 10 ⁇ 1 to complete the setting of the optical path.
- each optical node device 1, 10, 11, 11, 12, 13, 14 autonomously determines whether or not to perform 3R relay in the course of executing the signaling procedure for setting the optical path. You can judge. (Fourth embodiment)
- FIG. 14 is a diagram showing the 3R section information of the fourth embodiment, which is common to the third embodiment.
- FIGS. 15 and 18 show optical paths set in the optical network and 3R sections, which are common to the third embodiment.
- FIG. 17 and FIG. 20 are diagrams showing a signaling procedure when setting an optical path in the fourth embodiment.
- the fourth embodiment describes an example in which an optical node device that performs 3R relay is set at the time of signaling in both the upper optical path and the downlink optical path in a bidirectional optical path.
- the optical node device according to the fourth embodiment will be described as a configuration shown in FIG.
- the optical node device corresponding to the source node specifies the optical node device that performs 3R relay on the optical path to the destination node, and this optical node device This is a configuration that requires one device to perform 3R relay.
- the 3R section information holding unit 20 holds 3R section information shown in FIG.
- the optical node device corresponding to the source node since the optical node device corresponding to the source node specifies the 3R relay execution node, the optical node device corresponding to the source node is initially determined as follows. It is only necessary to hold the 3R section information, and it is not necessary for the all-optical node device or the plurality of optical node devices related to the optical path setting to hold the 3R section information as in the third embodiment. Therefore, if only the optical node device corresponding to the source node holds the information between the 3REs, the information storage resources can be effectively used.
- the operation of the optical node device according to the fourth embodiment will be described.
- FIG. 1 an example in which a bidirectional optical path (double line portion) from optical node devices 1 to 14 is set as shown in FIG.
- the 3R relay implementation node identification unit 25 of the optical node device 1 corresponding to the source node determines whether the optical node device 1 is part of the topology of the optical network. 3 Refer to R section information holding unit 20. As a result, it is confirmed that the optical node device 1 is the source node of the bidirectional optical path to be set and the 3R source node of the downstream optical path, and the optical node device 1 is set to the lower node. Judge that 3R relay is performed in the optical path.
- the 3R relay execution node specifying unit 25 refers to the 3R section information holding unit 20 and is a 3R destination node of the upstream optical path that the optical node device 1 is going to set up. Recognizing that, the optical node device 1 determines that 3R relay is not performed in the upstream optical path.
- the 3R-relay implementation node specifying unit 25 determines whether or not the optical node device 2 is an optical node device that implements 3R relay on an uplink or downlink optical path.
- the 3R relay execution node specifying unit 25 refers to the 3R section information stored in the 3R section information storage unit 20 and, in the upper or lower optical path, the optical node device 2 transmits the 3R signal.
- the optical node device 1 is a 3R source node, it can be understood that the optical node device 4 is a 3R section, so the optical node device 2 is 3 Judge that R relay will not be performed.
- the optical node device 1 is a 3R destination node
- the optical node device 4 is a 3R originating node with the optical node device 1 as the 3R destination node. Therefore, it is determined that the optical node device 2 does not perform the 3R relay even in the upper optical path.
- the 3R-relay implementation node specifying unit 25 determines whether the optical node device 3 is an optical node device that implements 3R relay.
- the 3R relay execution node specifying unit 25 refers to the 3R section information held in the 3R section information holding unit 20 and the optical node device 3 transmits the information from the optical node devices 3 to 14 in the lower optical path. Since it is a 3R originating node in the 3R section, 3R relaying may be performed, or since it is not a 3R originating node in the 3R section from the optical node device 1 to the optical node device 4 in the downstream optical path. It recognizes that the optical signal may be transmitted as it is to the optical node device 4 which is the 3R destination node without performing the 3R relay.
- the 3R relay execution node specifying unit 25 uses the 3R execution simulation unit 23 and the comparison unit 24 to determine the optical path from the optical node devices 3 to 14. Then, the number of 3R executions in the case where the optical node device 3 functions as a 3R originating node and in the case where the optical node device 3 does not function is compared.
- the following description is the same as in the first embodiment.
- the simulation result of the 3R execution simulation unit 23 is input to the comparison unit 24.
- the comparison unit 24 indicates that it is possible to reduce the number of 3Rs performed when the optical node device 3 performs the 3R relay in the downstream optical path as compared with a case where the 3R relay is not performed, and outputs that effect as a comparison result. . 3 R relay execution node identification unit 25 As the comparison result, select the one with the smaller number of 3R implementations. Therefore, it is determined that the optical node device 3 performs the 3R relay in the lower optical path.
- the 3R relay execution node specifying unit 25 indicates that the optical node device 3 is not a 3R originating node in the upstream optical path, and that the optical node device 1 is a 3R destination node. Since it is known that the node device 4 is the 3R originating node, it is determined that the 3R relay is not performed on the upstream optical path.
- the 3R-relay implementation node specifying unit 25 determines whether or not the optical node device 4 is an optical node device that implements 3R relay.
- the 3R relay execution node specifying unit 25 refers to the 3R section information held in the 3R section information holding unit 20 and the optical node device 4 is a 3R destination node in the downstream optical path. If the device 3 is a 3R originating node in the downstream optical path, it can be understood that the optical node device 14 is a 3R section up to the optical node device 14, so the optical node device 4 determines that it is not necessary to perform the 3R relay. .
- the 3R relay execution node specifying unit 25 refers to the 3R section information held in the 3R section information holding unit 20 and the optical node device 4 connects the optical node device 1 to the 3R section information in the upstream optical path. Since it is clear that this is the 3R originating node to be the destination node, it is determined that 3R relay will be performed on the upstream optical path.
- the 3R-relay implementation node specifying unit 25 determines whether or not the optical node device 5 is an optical node device that implements 3R relay. 3R relay 3 ⁇ 4
- the node identification unit 25 refers to the 3R section information stored in the 3R section information storage unit 20, and the optical node device 5 is not the 3R source node of the downstream optical path. Also, if the optical node device 3 is a 3R originating node, it can be seen that the optical node device 14 is a 3R section up to the optical node device 14, so the optical node device 5 determines that the 3R relay is not performed.
- the optical node device 5 recognizes that it is the 3R originating node of the upper optical path, and determines that the 3R relay is performed on the upstream optical path. Further, the 3R-relay-implementing-node specifying unit 25 determines whether the optical node device 14 is an optical node device that implements 3R-relay.
- the 3R relay execution node identification unit 25 refers to the 3R section information held in the 3R section information holding unit 20.Since the optical node device 14 is a destination node, 3R relay is performed on the downstream optical path. Although it is not necessary to perform this, it is determined that it is necessary to perform 3R relay as a 3R source node on the upstream optical path.
- the optical node device 5 is a 3R originating node in the upstream optical path
- the optical node device 14 is a 3R originating node and the optical node device 5 is a 3R destination node.
- the optical node device “! 4” sets itself to the 3R originating node if it does not belong to any of the 3R sections that have 3R originating nodes on the optical path through it. It is determined that the optical node device at the next hop destination is the 3R destination node and that the optical node device performs the 3R relay. '' It is.
- the optical path setting unit 22 of the optical / optical device 1 executes a signaling procedure for setting an optical path. That is, the optical node device 1 secures resources for optical path setting and 3R relay, and sends an optical path setting request (Path) to the optical node device 2.
- an optical path setting completion notification (Resv) is transmitted to the optical node device 5.
- the optical path setting completion notification (Resv) is transmitted to the optical node device 5 ⁇ 4 ⁇ 3 ⁇ 2 ⁇ 1 to complete the optical path setting.
- optical node device serving as the source node specifies an optical node device that performs 3R relay on the bidirectional optical path to the destination node, other optical nodes on the bidirectional optical path are specified.
- the load device only has to follow the instruction from the source node, and the calculation load can be reduced.
- optical node devices other than the optical node device serving as the source node do not need to hold the 3R section information, and can effectively use information storage resources.
- the optical node device of the fourth embodiment Next, another example of the operation of the optical node device of the fourth embodiment will be described.
- a bidirectional optical path double line portion
- the node specifying unit 25 refers to the 3R section information holding unit 20 in order to know which part of the topology of the optical network the optical node device 1 is.
- the optical node device 1 recognizes that it is the source node of the bidirectional optical path to be set and the 3R source node of the lower optical path, and the optical node device 1 Judge that 3R relay is performed in the optical path.
- the 3R relay execution node specifying unit 25 refers to the 3R section information holding unit 20 and determines that the 3R relay node is the 3R destination node of the upstream optical path to be set by the optical node device 1 from now on. , And determines that the optical node device 1 does not perform 3R relay on the upstream optical path.
- the 3R-relay-implementing-node specifying unit 25 determines whether the optical node device 10 is an optical node device that performs 3R relay on an uplink or downlink optical path.
- the 3R relay execution node specifying unit 25 refers to the 3R section information held in the 3R section information holding unit 20.In the upstream or downstream optical path, the optical node device 10 is not a 3R source node, In the downstream optical path, if the optical node device 1 becomes the 3R originating node, it is known that the optical node device 11 is a 3R section, so the optical node device 10 determines that the 3R relay is not performed.
- the optical node device 1 is the 3R destination node, and according to the 3R section information, the optical node device 12 ⁇ the optical node device 1 is set to the 3R destination node 3 Since it is known that the node is the R originating node, the optical node device 10 determines that the 3R relay is not performed even in the upper optical path.
- the 3R relay implementation node specifying unit 25 determines whether the optical node device 11 is an optical node device that implements 3R relay.
- the 3R relay execution node specifying unit 25 refers to the 3R section information held in the 3R section information holding unit 20 and the optical node device 11 sends the optical node devices 11 to 13 in the downstream optical path. Since it is a 3R originating node in the 3R section, it is determined that 3R relay will be performed.
- the optical node device 11 is not a 3R originating node in the upper optical path, and if the optical node device 1 is a 3R destination node, the optical node device 12 becomes a 3R originating node. Therefore, it is determined that 3R relay is not performed in the upstream optical path.
- the 3R relay execution node specifying unit 25 indicates that the optical node device 12 is neither a 3R originating node nor a 3R destination node in the downstream optical path, and that the optical node device 11 is a downstream optical path. If it is a 3R originating node in the path, it is known that the section up to the optical node device 13 is a 3R section, so the optical node device 12 determines that it is not necessary to carry out the 3R relay. Further, since it is known that the optical node device 12 is a 3R originating node with the optical node device 1 as a 3R destination node in the upstream optical path, it is determined that the 3R relay is performed in the upstream optical path.
- the 3R relay execution node specifying unit 25 determines that the optical node device 13 is not a downstream 3R source node and that the optical node device 11 is a 3R source node. It can be seen that the optical node device 13 is a 3R destination node.
- the one optical node device is an optical node device corresponding to a 3R destination node, and if it is not a destination node, the one optical node device is a 3R originating node and the next hop destination optical node device Is determined as the 3R destination node, and the one optical node device is determined to be the optical node device that implements 3R relay.
- the optical node device 13 determines that the 3R relay is not performed.
- the 3R relay implementation node specifying unit 25 does not need to implement 3R relay on the downstream optical path because the optical node device 14 is a destination node, but on the upstream optical path, It is determined that it is necessary to perform the 3R aggregation by setting the optical node device 14 as the 3R originating node and the optical node device 12 as the 3R destination node.
- the optical path setting unit 22 of the optical node device 1 executes a signaling procedure for setting an optical path. That is, the optical node device 1 secures resources for optical path setting and 3R relay, and sends an optical path setting request (P ath) to the optical node device 10.
- the source is secured and an optical path setting completion notification (Res V) is sent to the optical node device 13.
- the optical path setting completion notification (Res V) is transmitted to the optical node devices 13 ⁇ 12 ⁇ 11 ⁇ 10 ⁇ 1 to complete the optical path setting.
- optical node device serving as the source node specifies the optical node device that performs 3R relay on the bidirectional optical path to the destination node, other optical nodes on the bidirectional optical path are specified.
- the load device only has to follow the instruction from the source node, and the calculation load can be reduced.
- optical node devices other than the optical node device serving as the source node do not need to hold the 3R section information, and can effectively use information storage resources.
- FIGS. 21, 22, 24, and 25 show 3R section information in the optical node device of the fifth embodiment.
- FIGS. 23 and 26 are diagrams showing a signaling procedure when setting an optical path in the fifth embodiment.
- the optical node device includes a 3R section information holding unit 20 that holds 3R section information having itself as a 3R originating node, and a self-node included in the optical path setting request.
- the optical path setting unit 22 sets the 3R destination node to an optical node device corresponding to a 3R destination node in a 3R section on an optical path having itself as a 3R source node. Send a message to convey that this is a password.
- the 3R relay execution determining unit 21 receives the message indicating that it is the 3R destination node included in the optical path setting request, and if it is not the destination node, the 3R interval information holding unit 2 Referring to 0, if the node is not the 3R source node on the optical path, the optical node device that performs 3R relay as the 3R source node with itself as the 3R destination node at the next hop destination optical node device. Judge that there is. Also, the optical path setting unit 22 A message is transmitted to the next hop destination optical node device indicating that the optical node device is a 3R destination node.
- an optical node device corresponding to a 3R source node holds 3R section information related to the 3R source node. Since other 3R section information is not retained, information storage resources can be used effectively.
- the 3R relay execution determination unit 21 of the optical node device 1 corresponding to the 3R source node recognizes that the optical path setting request using the optical node device 1 as the source node has been issued, and the optical node device 1 It is determined that 3R relay will be implemented in. Further, the 3R section information holding unit 20 holds 3R section information shown in FIG. 21, which allows the 3R destination node when the optical node device 1 is a 3R originating node. It recognizes that the node is the optical node device 4.
- the optical path setting unit 22 of the optical node device 2 secures resources for setting an optical path, and transmits an optical path setting request (Path) to the optical node device 3 when transmitting an optical path setting request (Path) from the optical node device 1.
- the 3R relay execution determination unit 21 refers to the 3R section information held in the 3R section information holding unit 20, and the optical node device 3 transmits the 3R originating node in the 3R section from the optical node devices 3 to 14. Therefore, 3R relay may be performed, or 3R relay is not performed in 3R section from optical node device 1 to optical node device 4 without 3R relay since it is not a 3R originating node. It is recognized that the optical signal may be transmitted through a certain optical node device 4 as it is.
- the 3R relay execution determination unit 21 uses the 3R execution simulation unit 23 and the comparison unit 24 to determine the optical path from the optical node devices 3 to 14 to the optical node device 3. Compare the number of 3R implementations in both cases where the server functions as a 3R originating node and when it does not. The following description is the same as in the first embodiment.
- the simulation result of the 3R execution simulation unit 23 is input to the comparison unit 24.
- the comparing unit 24 knows that the number of times the 3R is performed can be reduced when the optical node device 3 performs the 3R relay as compared with the case where the optical node device 3 does not perform the 3R relay, and outputs that effect as a comparison result.
- the 3R relay execution determination unit 21 selects the one with the smaller number of 3R piercings as the comparison result. Therefore, it is determined that the optical node device 3 performs the 3R relay.
- the optical path setting unit 22 secures resources for optical path setting and 3R relay, and transmits an optical path setting request (Path) to the optical node device 4, as shown in FIG.
- the optical path setting unit 22 of the optical node device 4 secures resources for setting the optical path, and transmits the optical path setting request (Path) to the optical node device 5 when transmitting the DI from the optical node device 3.
- the optical path setting unit 22 of the optical node device 14 secures resources for setting the optical path, and sends an optical path setting completion notification (Resv) to the optical node device 5.
- the optical path setting completion notification (Resv) is transmitted to the optical node devices 5 ⁇ 4 ⁇ 3 ⁇ 2 ⁇ 1 to complete the setting of the optical path.
- the 3R relay execution determination unit 21 of the optical node device 1 corresponding to the 3R source node recognizes that the optical path setting request with the optical node device 1 as the source node has been issued, and recognizes that the optical node device 1 has been issued. Judge that 3R relay is performed in the optical path. Further, the 3R section information holding unit 20 holds 3R section information shown in FIG. 21, whereby the 3R destination information when the optical node device 1 is a 3R originating node is stored. It recognizes that the node is the optical node device 11.
- the optical path setting unit 22 of the optical node device 10 secures resources for setting the optical path, and transmits an optical path setting request (Path) to the optical node device 11 when transmitting the optical path setting request (Path) from the optical node device 1.
- the optical path setting unit 22 of the optical node device 14 secures resources for setting the optical path, and sends an optical path setting completion notification (Res V) to the optical node device 13.
- the optical path setting completion notification (Res V) is transmitted to the optical node devices 13 ⁇ 12 ⁇ 11 ⁇ 10 ⁇ 1 to complete the setting of the optical path.
- FIGS. 27 to 30 and FIGS. 32 to 35 are diagrams showing 3R section information in the optical node device of the sixth embodiment.
- FIGS. 31 and 36 are diagrams showing a signaling procedure when setting an optical path in the sixth embodiment.
- the optical node device according to the sixth embodiment has a 3R section information holding unit 20 that holds 3R section information that sets itself as a 3R originating node and a 3R destination node, and an optical path setting.
- the self When receiving a message indicating that the self included in the request is a 3R destination node in the lower light path, if the self is not a destination node, the self is referred to the 3R section information holding unit 20 and the self is referred to as the lower light path. If the node is a 3R source node on the path, it is determined that the node is an optical node device that performs 3R relay, and is equivalent to a 3R destination node in a 3R section on a downstream optical path that uses itself as a 3R source node. And an optical path setting unit 22 for transmitting a message for transmitting that the optical node device is a 3 R destination node to the optical node device.
- the optical path setting unit 22 receives the message indicating that the self included in the optical path setting request is the 3R originating node in the upper optical path and receives the message in the upper optical path. If it is determined that the node is an optical node device that performs R relay, and if it is not the destination node, it refers to the 3R section information holding unit 20 and is itself a 3R destination node on the upper optical path. Occasionally, a message is transmitted to the optical node device corresponding to the 3R source node on the upstream optical path that has itself as the 3R destination node, to inform that the optical node device is the 3R source node.
- the optical path setting unit 22 receives the message indicating that the self included in the optical path setting request is the 3R destination node in the lower optical path, and if the self is not the destination node, the 3R section information holding unit Referring to 20 and if the node is not the 3R originating node on the downstream optical path, it sets itself as the 3R destination node for the next hop destination optical node device on the lower optical path. It is determined that this is an optical node device that implements 3R relay as a node, and that the optical node device is its own 3R destination node for the next hop destination optical node device. Generate a message to communicate.
- the optical path setting unit 22 receives the message indicating that it is the 3R originating node in the upstream optical path included in the optical path setting request, and performs its own 3R relay in the upper optical path. If it is determined that the optical node device is to be implemented, and if it is not the destination node, it refers to the 3R section information holding unit 20 and if it is not the 3R destination node on the upstream optical path, it refers to the upper optical path.
- the above-mentioned previous hop source optical node device informs the previous hop source optical node device that it is a 3R originating node with its own 3R destination node. Generate a message for
- an optical node device corresponding to a 3R originating node or a 3R destination node holds 3R section information relating to itself. Since other 3R section information is not retained, information storage resources can be used effectively.
- the 3R relay execution determination unit 21 of the optical node device 1 recognizes that a bidirectional optical path setting request with the optical node device 1 as the originating node has been issued, and the optical node device 1 transmits the 3R It is determined that relaying will be performed. Also, the 3R section information holding unit 20 holds 3R section information shown in FIG. 27, whereby the 3R section information in the case where the optical node device 1 is the 3R source node in the lower optical path is shown. It recognizes that the R destination node is the optical node device 4.
- the optical node device 1 recognizes that the optical node device 1 is a 3R destination node.
- the optical path setting unit 22 of the optical node device 1 secures resources for setting the downstream optical path based on the judgment of the 3R relay execution determining unit 21, and as shown in FIG.
- the optical node device 1 is the 3R originating node in the lower optical path, and the 3R destination node in this 3R section is the optical node device 4.
- the 3R relay execution determination unit 21 refers to the 3R section information storage unit 20 and determines that the optical node device 1 is the 3R destination node of the upper optical path to be set up from now on. Upon recognition, the optical node device 1 determines that 3R relay is not performed in the upstream optical path.
- the optical path setting unit 22 of the optical node device 1 secures resources for setting the upper optical path in response to the judgment of the 3R relay execution determining unit 21, and as shown in FIG.
- the optical node device 1 is the 3R destination node in the upstream optical path
- the 3R source node in this 3R section is the optical node device 4.
- the optical node device that has received the optical path setting request (Path) from the optical node device 1 The second optical path setting unit 22 inquires of the 3R relay execution determination unit 21 whether the optical node device 2 is an optical node device that performs 3R relay on the upstream or downstream optical path. Since the optical node device 2 is not a 3R originating node or a 3R destination node, the 3R section information holding unit 20 does not hold 3R section information. Therefore, it is determined that the optical node device 2 does not perform the 3R relay.
- the optical path setting unit 22 of the optical node device 2 secures resources for setting the downlink and uplink optical paths based on the judgment of the 3R relay execution determining unit 21 and, as shown in FIG.
- the optical path setting unit 22 of the optical node device 3 that has received the optical path setting request (P ath) from the optical node device 2 determines whether the optical node device 3 is an optical node device that performs 3R relay. Inquire to the R relay execution determination unit 21.
- the 3R relay execution determination unit 21 of the optical node device 3 uses the 3R execution simulation unit 23 and the comparison unit 24 to determine the downstream optical path from the optical node devices 3 to 14, The number of 3R executions is compared between the case where the optical node device 3 functions as the 3R originating node, the case where the optical node device 3 functions, and the case where it does not exist.
- the following description is the same as in the first embodiment.
- the simulation result of the 3R execution simulation unit 23 is input to the comparison unit 24.
- the comparison unit 24 knows that it is possible to reduce the number of times 3R is performed when the optical node device 3 performs the 3R relay in the downstream optical path as compared with a case where the 3R relay is not performed, and outputs the effect as a comparison result.
- 3 The R relay execution decision unit 21 As the comparison result, select the one with the smaller number of 3R implementations. Therefore, the optical node device 3 determines that the 3R relay is performed on the downstream optical path.
- the optical path setting unit 22 of the optical node device 3 secures resources for optical path setting and 3R relaying based on the judgment of the 3R relay execution determining unit 21, and as shown in FIG.
- the optical node device 3 is the 3R source node in the downstream optical path
- the optical path setting unit 22 of the optical node device 4 that has received the optical path setting request (Path) from the optical node device 3 determines whether or not the optical node device 4 is an optical node device that performs 3R relay. Inquire to the R relay execution determination unit 21.
- the 3R relay execution determining unit 21 of the optical node device 4 refers to the 3R section information shown in FIG. 29 held in the 3R section information holding unit 20 and the optical node device 4 sets the 3R destination node in the downstream optical path.
- the optical node device 4 determines that it is not necessary to perform the 3R relay because it is known that the interval is 3R.
- the optical path setting unit 22 of the optical node device 4 secures the resources for the optical path setting and the 3R relay according to the judgment of the 3R relay execution determining unit 21, and as shown in FIG.
- the optical path setting unit 22 of the optical node device 5 that has received the optical path setting request (Path) from the optical node device 4 determines whether or not the optical node device 5 is an optical node device that performs 3R relay. Inquire to the R relay execution determination unit 21.
- the 3R relay execution determining unit 21 of the optical node device 5 refers to the 3R section information shown in FIG. 30 held in the 3R section information holding unit 20 and the optical node device 5 determines the 3R originating node of the downstream optical path.
- the optical path setting unit 22 of the optical node device 5 reserves the resources for the optical path setting and the 3R relay based on the judgment of the 3R relay execution determining unit 21 and, as shown in FIG.
- the optical node device 5 is a 3R source node in the upstream optical path
- the optical node device 14 considers itself as “3R originating node when it does not belong to any of the 3R sections having 3R originating nodes on the optical path passing through it. It is determined that the optical node device at its next hop destination is the 3R destination node and that it is the optical node device that implements 3R relay. '') is there. Therefore, the optical node device 5 is a 3R destination node, and the 3R originating node in this 3R section is the optical node device 14; Mount on request.
- the optical path setting unit 22 of the optical node device 14 that has received the optical path setting request (Path) from the optical node device 5 determines whether or not the optical node device 14 is an optical node device that performs 3R relay. To the 3R relay execution judgment unit 21.
- the optical path setting unit 22 of the optical node device 14 receives the judgment of the 3R relay execution determining unit 21 and secures a resource for setting the optical path 3R relay, and as shown in FIG. Sends an optical path setting completion notification (Resv) to the device 5.
- Resv optical path setting completion notification
- This optical path setting completion notification (Resv) is transmitted to the optical node device 5 ⁇ 4-3 ⁇ 2 ⁇ 1, and the optical path setting is completed.
- each of the optical node devices 1, 2, 3, 4, 5, and 14 autonomously determines whether or not to carry out the 3R relay in the process of executing the signaling procedure for setting the optical path. be able to.
- the 3R relay execution determination unit 21 of the optical node device 1 recognizes that the bidirectional optical path setting request with the optical node device 1 as the originating node has been issued, and the optical node device 1 Judge to perform R relay.
- the 3R section information holding unit 20 holds 3R section information shown in FIG.
- the 3R destination node is the optical node device 11 when the optical node device 1 is a 3R source node.
- the optical node device 12 is a 3R originating node
- the optical node device 1 is a 3R destination node.
- the optical path setting unit 22 of the optical node device 1 secures resources for setting the downlink optical path based on the judgment of the 3R relay execution determining unit 21, and as shown in FIG.
- the optical node device 1 When transmitting the path setting request (Path), it indicates that the optical node device 1 is the 3R originating node in the downstream optical path, and that the 3R destination node in this 3R section is the optical node device 11
- the 3R relay execution determination unit 21 refers to the 3R section information storage unit 20, recognizes that the optical node device 1 is the 3R destination node of the uplink optical path to be set up, and determines Node device 1 determines that 3R relay is not performed in the upper optical path.
- the optical path setting unit 22 of the optical node device 1 secures resources for setting up the upstream optical path and 3R relay based on the judgment of the 3R relay execution determining unit 21, and as shown in FIG.
- the optical node device 1 is the 3R destination node in the upstream optical path, and the 3R source node in this 3R section is the optical node device 12.
- the optical path setting unit 22 of the optical node device 10 that has received the optical path setting request (Path) from the optical node device 1 transmits the optical node device 10 that performs the 3R relay in the upstream or downstream optical path.
- the 3R relay execution determination unit 21 is inquired as to whether or not the device is a device, and is adjusted.
- the optical node device 10 is neither a 3R source node nor a 3R destination node, and does not hold the 3R section information in the 3R section information holding unit 20. Therefore, the optical node device 10 determines that 3R relay is not performed on any of the upstream and downstream optical paths.
- the optical path setting unit 22 of the optical node device 10 secures resources for setting the lower and upper optical paths in response to the judgment of the 3R relay execution determining unit 21, and as shown in FIG.
- the optical path setting unit 22 of the optical node device 11 receiving the optical path setting request (P ath) from the optical node device 10 determines whether the optical node device 11 is an optical node device that performs 3R relay.
- the 3R relay execution determination unit 21 is inquired about whether or not it is.
- the 3R relay execution determination unit 21 of the optical node device 11 refers to the 3R section information shown in FIG. 32 held in the 3R section information holding unit 20 and the optical node device 11 Device 11 Since it is a 3R originating node in the 3R section from 1 to 13, it is determined that 3R relay will be performed.
- the optical path setting unit 22 of the optical node device 11 receives the determination of the 3R relay execution determination unit 21 and secures resources for optical path setting and 3R relay, and as shown in FIG.
- the optical node device 11 When transmitting the optical path setting request (Path) to the device 12, the optical node device 11 is the 3R originating node in the downstream optical path, and the 3R destination node in the 3R section is the optical node device 1.
- the optical path setting unit 22 of the optical node device 12 that has received the optical path setting request (Path) from the optical node device 11 is an optical node device in which the optical node device 12 performs 3R relay.
- the 3R relay execution determination unit 21 is inquired about whether or not it is necessary.
- the 3R relay cold weather judging unit 21 of the optical node device 1 2 refers to the 3R section information shown in FIG. 33 held in the 3R section information holding unit 20, and the central node device 1 2 Neither the R originating node nor the 3R destination node determines that it is not necessary to implement 3R relay.
- the optical path setting unit 22 of the optical node device 12 receives the judgment of the 3R relay execution determination unit 21 and secures the resources for the optical path setting and the 3R relay, and as shown in FIG.
- the optical node device 12 is a 3R originating node in the upstream optical path, and is also a 3R destination node when the optical node device 14 is a 3R originating node in the upstream optical path.
- the optical path setting unit 22 of the optical node device 13 that has received the optical path setting request (Path) from the optical node device 12 is an optical node device in which the optical node device 13 performs 3R relay.
- the 3R relay execution determination unit 21 is inquired about whether or not it is.
- the self refers to the 3R section information holding unit 20 and the self
- the optical node that implements 3R relay as a 3R source node with itself as the 3R destination node for the next hop destination optical node device on the lower optical path
- the optical node device 13 determines that the optical node device 13 performs 3R relay.
- the optical path setting unit 22 sends the optical node device 14 to the next hop destination optical node device 14 ⁇ the 3R destination node of the optical node device 13.
- Generate DETR 14 as a message to communicate that In the upstream optical path, However, the optical node device 13 is neither the 3R originating node nor the 3R destination node, and determines that the 3R relay is not performed.
- the optical path setting unit 22 of the optical node device 13 receives the determination of the 3R relay execution determination unit 21 and secures resources for optical path setting and 3R relay, and as shown in FIG.
- the optical node device 13 is a 3R source node in the downstream optical path, and the 3R destination node between the 3Rs is an optical node.
- the optical path setting unit 22 of the optical node device 14 that has received the optical path setting request (Path) from the optical node device 13 is an optical node device in which the optical node device 14 performs 3R relay.
- the 3R relay execution determination unit 21 is inquired about whether or not it is.
- the optical path setting unit 22 of the optical node device 14 receives the judgment of the 3R relay execution determining unit 21 and secures the resources for the optical path setting and the 3R relay, and as shown in FIG.
- the optical path setting completion notification (Resv) is sent to the device 13.
- This optical path setting completion notification (Res V) is transmitted to the optical node devices 13 ⁇ 12 ⁇ 11 ⁇ 10 ⁇ 1 to complete the setting of the optical path.
- each of the optical node devices 1, 10, 11, 12, 13, and 14 autonomously performs 3R relay in the course of executing the signaling procedure for setting the optical path. Can be determined.
- FIG. 37 is a conceptual diagram showing the relationship between the network control device and the optical node device of the seventh embodiment.
- FIG. FIG. 38 is a block diagram of the network control device of the seventh embodiment.
- FIG. 39 is a block diagram of a main part of an optical node device according to a seventh embodiment.
- FIG. 40 is a sequence diagram showing the operation of the seventh embodiment.
- the network control device 40 of the seventh embodiment has a function of mutually communicating with each of the optical node devices 1 to 14, and manages the optical network 50 in an integrated manner. I understand. Here, among the management functions of the network control device 40, a management function relating to 3R section information will be described.
- the network control device 40 of the seventh embodiment includes a 3R section information database 41 that holds 3R section information corresponding to the topology information of the optical network 50.
- a 3R section information providing unit 43 for providing the 3R section information held in the 3R section information database 41 to the optical node device in response to a request from the optical node device.
- the 3R section information stored in the 3RE section information database 41 is the 3R section information collected by the 3R section information collection unit 42, and the 3R section information of the optical network 50. Every time is updated, the 3R section information collection unit 42 updates the 3R section information held in the 3R section information database 41.
- the optical node device is provided with an optical network 50 ⁇ topology for a network control device 40 that manages the optical network 50 to which the optical node device belongs.
- a 3R section information requesting unit 27 for requesting and obtaining 3R section information corresponding to the information is provided.
- the 3R section information requesting unit 27 of the optical node device requests 3R section information required by the own optical node device from the 3R section information providing unit 43 of the network controller 40 (step 1).
- the 3R section information required by the own optical node device is the 3R section information of the entire optical network 50 or the 3R section information related to the optical path passing through the own optical node device.
- the 3R section information request unit 27 recognizes the 3R section information required by the own optical node device, and requests the 3R section information providing unit 43 of the network control device 40.
- the 3R section information providing unit 43 of the network control unit 40 searches for the required required information (step 2).
- the 3R section information providing unit 43 extracts necessary information of 3R section information from the 3R section information database 41 (step 3), and transfers this to the 3R section information requesting unit 27 of the optical node device. (Step 4).
- the 3R section information requesting unit 27 checks the 3R section information transferred from the network control device 40, and if the required information is certainly requested, holds it in the 3R section information holding unit 20. (Step 5).
- the processing load required for searching and extracting necessary information by the 3R section information providing unit 43 of the network control device 40 is the largest.
- FIG. 37 is a conceptual diagram showing the relationship between the network control device and the optical node device of the eighth embodiment, which is common to the seventh embodiment.
- FIG. 38 is a block diagram of a network control device according to the eighth embodiment, which is common to the seventh embodiment.
- FIG. 41 is a block diagram of a main part of the optical node device of the eighth embodiment.
- FIG. 42 is a sequence diagram showing the operation of the eighth embodiment.
- the network control device 40 of the eighth embodiment has a function of mutually communicating with each of the optical node devices 1 to 14, and comprehensively controls the optical network 50. It is managed by Here, among the management functions of the network control device 40, a management function relating to 3R section information will be described.
- the network control device 40 of the eighth embodiment includes a 3R section information database 4 that holds 3R section information corresponding to the topology information of 50 per optical network. 1 and a 3R section information providing unit 43 for providing the 3R section information held in the 3R section information database 41 to the optical node device in response to a request from the optical node device. It is characterized by the following.
- the 3R section information stored in the 3R section information database 4 1 is 3R section information collected by the 3R section information collection unit 4 2, and the optical network 5 0 Each time the 3R section information is updated, the 3R section information collection unit 42 updates the 3R section information held in the 3R section information database 41.
- the optical node device corresponds to the topology information of the optical network 50 to a network control device 40 that manages the optical network 50 to which the optical node device belongs. Equipped with a 3R section information request section 27 that requests and obtains R section information, and selects information to select and hold at least a part of information related to itself from the obtained 3R section information A part 30 is provided.
- the 3R section information requesting section 27 of the optical node device requests 3R section information to the 3R section information providing section 43 of the network control device 40 (step 11). At this time, in the eighth embodiment, the necessary information of the own optical node device is not specified.
- the 3R section information providing unit 43 of the network control device 40 transfers the request to the 3R section information database 41 as it is (step 12).
- the 3R section information providing unit 43 extracts the 3R section information from the 3R section information database 41 (step 13) and transfers this to the information selection unit 30 of the optical node device (step 14). ).
- the information selection unit 30 selects information required by the own optical node device from the 3R section information transferred from the network control device 40, and discards unnecessary information (step 15).
- the necessary information generated in this way is stored in the 3R section information storage unit 20 (step 16).
- the eighth embodiment is different from the seventh embodiment in that the information is selected by the block configuration of the optical node device. Although the section 30 is added, the 3R section information requesting section 27 of the optical node apparatus and the 3R section information providing section 43 of the network control apparatus 40 do not need to select necessary information. These processing loads can be reduced as compared with the seventh embodiment.
- FIG. 43 is a block diagram of a main part of the optical node device of the ninth embodiment.
- the optical node device of the ninth embodiment corresponds to the topology information of the optical network 50 to which the node belongs to the network control device 40 that manages the optical network 50 to which the node belongs.
- 3 R section information request section 2 7 for requesting and acquiring 3 R section information
- 3 R section information request section 2 7 3R section information holding section 20 for holding the 3R section information obtained by the above, and an advertising section for advertising the 3R section information held in the 3R section information holding section 20 to other optical node devices. 28.
- one of the optical node devices 1 to 14 acquires the 3R section information from the network control device 40, and advertises this.
- the processing load on the network control device 40 can be reduced.
- two or more optical node devices acquire the 3R section information from the network control device 40, and advertise this information to other optical node devices. Even if there is a gap, this can be compensated for by each other, and highly reliable 3R section information can be retained.
- FIG. 44 is a block diagram of a main part block of the optical node device according to the tenth embodiment.
- the optical node device according to the tenth embodiment has an optical node device to which the node belongs when the node itself is the source node with respect to the network control device 40 that manages the optical network 50 to which the node belongs.
- 3R section information holding unit 20 and the 3R section information held in the 3R section information holding unit 20 are transmitted to the other optical node devices included in the optical path to the destination node when the self is the source node. And a transmission unit 29 for transmitting.
- the optical node device serving as the source node of the optical path transmits 3R section information and information to other optical node devices included in the path of the optical path from the own optical node device to the optical node device serving as the destination node.
- the advertisement of the 3R section information for the unspecified destination is provided, whereas in the 10th embodiment, the 3R section information is transmitted to the specified destination.
- FIG. 45 is a block diagram of a main part of the optical node device according to the first embodiment.
- 11th Embodiment Optical Node Device Corresponds to the topology information of the optical network 50 to which the self belongs when the self is the source node for the network control device 40 that manages the optical network 50 to which the self belongs, as shown in FIG.
- 3 R section information requesting section 27 for requesting and acquiring 3R section information
- 3R section information holding section 20 for holding 3R section information acquired by 3R section information requesting section 27
- An advertisement unit 28 that advertises the 3R section information held by the 3R section information holding unit 20 to another node device, and the advertisement by the advertisement unit 28 relates to the optical path that passes through itself.
- An information selection unit 30 for determining whether or not the advertisement is provided is provided. The information selection unit 30 discards the advertisement when the advertisement is not related to the optical path passing through the advertisement selection unit 30, and the advertisement passes through the advertisement selection unit 30 If the advertisement is related to the optical path, the advertisement content is stored in the 3R section information storage unit 20 It is characterized by being held.
- the transmission unit 29 needs to transmit the 3R section information to the specific destination.
- the advertising unit 30 transmits the 3R section information to the unspecified destination. Since the advertisement of the section information is sufficient, the processing load of the destination management can be reduced. Furthermore, since the 3R section information irrelevant to the optical node device can be discarded by using the information selecting section 30, the information storage resources of the 3R section information holding section 20 can be used effectively. Can be.
- FIG. FIG. 4 is a block diagram of a main part of the optical node device of the 12th embodiment, which is common to the first embodiment.
- FIG. 46 is a diagram for explaining the 3R relay execution node determination method of the 12th embodiment.
- the optical node device of the first and second embodiments has a 3R section information holding unit 2 for holding information on the number of hops ⁇ between itself and the 3R destination node in the 3R section to which the optical node device belongs.
- 0 and 3R relay execution determining unit 2 1 that autonomously determines whether or not to perform 3R relay on the optical signal transmitted from the 3R source node in the 3R section to which it belongs.
- the 3R relay execution determination unit 21 determines the number of 3R trunks provided by itself, the threshold of the number of empty 3R trunks, and the number of hops to the 3R destination node. When the threshold is ⁇ ⁇ — ⁇ ,
- the optical node device 1 is a 3R originating node
- the optical node device 3 is a 3R destination node
- the optical node device 2 is between the optical node devices 1 and 3
- the optical node device 2 states that “for a plurality of different 3R sections including overlapping portions on the optical path passing through one optical node apparatus, the one optical node apparatus is a 3R source node in any of the 3R sections. Yes, it does not correspond to a 3R originating node or a 3R destination node in other 3R sections.
- the 3R relay execution determination unit 21 uses the 3R execution simulation unit 23 and the comparison unit 24 to “ Referring to the 3R section information related to the optical path from the load device to the destination node, 3R implementation in both the case where the one optical node device functions as the 3R originating node and the case where it does not function Based on the comparison result, when the one optical node device functions as the 3R originating node, the number of times of execution of the 3R is larger than when the one optical node device does not function as the 3R originating node. When the number is small, it is determined that the one optical node device is an optical node device that performs 3R relay. "
- the optical node device in an optical node device on a route of a certain optical path, if the optical node device is a 3R originating node in any 3R section and has a 3R trunk, the optical node device If there is enough room for the number of 3R trunks in a single device and if the number of hops to the 3R destination node of the optical path, that is, the 3R source node in the next 3R section, is small, the Judge that it is better for the node device to perform 3R relay. As a result, the 3R relay load of the 3R originating node in the next 3R section can be reduced.
- the optical node device before the 3R destination node performs 3R relay in place of the 3R destination node in this way, a message indicating this is transmitted to the 3R destination node.
- the original 3R destination node has its own optical node device at the hop ahead of itself. Recognizes that 3R relay has been performed instead, and performs switching connection as it is without 3R relay for incoming optical signals that should originally perform 3R relay. In this case, the application will be changed from the originally planned 3R section to the 3R section where the optical node device that has actually implemented 3R relaying is the 3R originating node.
- TH- ⁇ is set to a small value. It is desirable to implement relaying to assist 3R relaying of 3R originating nodes in the next 3R section.
- T H— ⁇ be small.
- TH- ⁇ and TH- ⁇ are appropriately set in consideration of the number of hops in the entire 3R section and the 3R destination node, that is, the number of 3R trunks of the 3R originating node in the next 3R section.
- the optical node device of the thirteenth embodiment will be described with reference to FIG. 4, FIG. 47, and FIG. 48 described in the first embodiment.
- the block diagram of the main part of the optical node device of this embodiment is the same as that of the first embodiment, and is as shown in FIG. However, the function of each part constituting the optical node device is different from that of the first embodiment.
- FIG. 47 is a diagram for explaining the 3R relay execution node determination method of the present embodiment.
- FIG. 48 is a diagram for explaining the operation of the optical node devices according to the thirteenth and fourteenth embodiments.
- the optical path setting request includes a label for specifying the wavelength to be used in order from the source node when switching from the source node to the destination node, and the label is one for each time one wavelength is used. Deleted.
- the switched connection uses as few wavelengths as possible on the optical path from the source node to the destination node.
- Switching connection is performed based on the policy of switching connection by number. In other words, it is best to connect from the source node to the destination node with one wavelength, perform wavelength conversion only when there is no available wavelength, and use other wavelengths.
- Wavelength conversion trunks perform wavelength conversion for such switching connection.However, the wavelength conversion converts the optical signal to an electrical signal and then to an optical signal again. It takes place at the same time. If it is necessary to perform 3R relay at a place where wavelength conversion is not required, wavelength conversion is performed by using a wavelength conversion trunk so that the input and output have the same wavelength.
- the source node refers to the wavelength usage status of the optical network that changes from time to time based on the topology information of the optical network, and A wavelength conversion plan from the node to the destination node is drafted, and a label indicating the wavelength to be used is mounted on the optical path setting request from the source node.
- the optical node device on the way refers to the label and determines whether or not the own optical node device performs wavelength conversion. If it is necessary to perform wavelength conversion, the wavelength conversion resource of the own optical node device is used. To secure. When the own optical node device performs wavelength conversion, the label corresponding to the wavelength to be converted, which is included in the optical path setting request, is deleted, and the optical path setting request is sent to the next hop adjacent optical node device.
- the network control device (not shown) stores necessary information and the source node sets an optical path.
- a configuration may be adopted in which necessary information is acquired from the network controller and a wavelength conversion plan is drafted.
- the optical node device of the present embodiment has a 3R section information holding unit 2 that holds information on the number of hops H between itself and the 3R destination node in the 3R section to which it belongs.
- 3R relay execution determining unit 21 which autonomously determines whether or not to perform 3R relay on the optical signal transmitted from the 3R source node in the 3R section to which it belongs.
- the 3R relay execution determination unit 21 determines the number of wavelength conversion trunks provided by itself, the threshold of the number of empty 3R trunks TH_, and the threshold of the number of hops to the 3R destination node. Where TH—H, the number of remaining labels is L, and the threshold for the number of remaining labels is TH—1_,
- the 3R relay execution determination unit 21 determines that the self does not execute the 3R relay.
- each optical node device includes a switch unit 130 for switching and connecting optical signals, and a plurality of wavelength conversion trunks 140.
- an optical path is set from the optical node device # 1 as the source node to the optical node device # 10 as the destination node.
- the 3R section set on the optical path is a section where the optical node device # 1 is a 3R source node and the optical node device # 5 is a 3R destination node, and the optical node device # 2 is a 3R source node.
- Optical node device # 8 is a 3R source node
- optical node device # 10 is a 3R destination node
- optical node device # 9 is a 3R source node
- optical node device # 10 is a 3R node. This is a 3R section to be
- the number of wavelength conversion trunks that each optical node device has is five for optical node devices # 1, # 2, # 3, # 4, # 5, # 6, # 7, and # 9, and five for optical node devices # 8 and # 9.
- # 10 is 10 each.
- the optical node device # 1 is configured to minimize the number of 3R operations.
- 3R destination node when is the 3R originating node is the optical node device # 5
- 3R destination node when optical node device # 5 is the 3R originating node is the optical node device. It is best to relay the 3R section with the optical node device # 10 as the 3R destination node when the optical node device # 8 is the 3R originating node as the device # 8.
- the optical node device # 1 sends an optical path setting request to the optical node device # 2.
- the optical path setting request includes a plurality of labels (label sets) indicating wavelength conversion required along the route.
- label sets indicating wavelength conversion required along the route.
- the optical node device # 1 and Between the optical node device # 3, the wavelength ⁇ 1 is used, and the label L1 is used.
- the wavelength ⁇ 2 is used between the optical node device # 3 and the optical node device # 5, and the label L2 is used.
- the wavelength ⁇ 3 is used between the optical node device # 5 and the optical node device # 7, and the label 3 is used.
- the wavelength ⁇ 4 is used between the optical node device # 7 and the optical node device # 10, and the label L 4 is used.
- optical node device # 1 is the source node and a 3R source node, it is determined that 3R relay will be performed from the beginning.
- the optical node device # 2 which has received the optical path setting request from the optical node device # 1, recognizes that the optical node device # 2 itself can set the optical path by the wavelength ⁇ 1, and the label L1 ( A 1) to determine whether to set up an optical path, and whether to implement 3R relay
- the optical node device # 3 which has received the optical path setting request from the optical node device # 2, recognizes that it is impossible to set the optical path by the wavelength or 1 and recognizes the label L 2 ( ⁇ 2 ) To set an optical path. Also, since it is not the 3R originating node, it is determined that 3R relay will not be performed from the beginning.
- the optical node device # 4 which has received the optical path setting request from the optical node device # 3, recognizes that the optical path can be set by using the wavelength; I2, and the label L2 ( ⁇ 2) to determine whether to set up the optical path, and whether or not to implement 3R relay.
- optical node device # 4 Is one hop from optical node device # 4 to optical node device # 5, which is the 3R destination node. continue,
- optical node equipment # 4 label L2 is used. Therefore, the number of remaining labels is L3 and L4, which is not satisfied. Therefore, it is determined that the optical node device # 4 does not perform the 3R relay.
- the optical node device # 5 which has received the optical path setting request from the optical node device # 4, recognizes that it is impossible to set the optical path by the wavelength ⁇ 2, and according to the label L3 ( ⁇ ⁇ ⁇ ⁇ 3). It is determined that an optical path is to be set. Also, since the optical node device # 5 is a 3R destination node when the optical node device # 1 is a 3R originating node, it is a 3R originating node in the next 3R section, and furthermore, its own previous hop optical Recognizing that none of the node devices # 2, # 3, and # 4 is taking over for 3R relay, the optical node device # 5 determines from the beginning that 3R relay will be performed.
- the optical node device # 6 which has received the optical path setting request from the optical node device # 5, recognizes that it is possible to set the optical path by the wavelength; I3, and the optical path is determined by the label L3 ( ⁇ 3). Judge to set. Also, since it is not a 3R originating node, it is determined that 3R relay will not be performed from the beginning.
- the optical node device # 7 which has received the optical path setting request from the optical node device # 6, recognizes that it is impossible to set an optical path using the wavelength ⁇ 3, and the label L4 ( ⁇ Determine whether to set up an optical path according to 4) and determine whether to implement 3R relay.
- optical node device # 7 Since label L4 is used in optical node device # 7, the number of remaining labels is 0, which is satisfied. Therefore, it is determined that the optical node device # 7 performs the 3R relay. Optical node device # 7 transmits a message to the effect that 3R relay is performed in place of optical node device # 8, to another optical node device.
- the optical node device # 8 which has received the optical path setting request from the optical node device # 7, recognizes that the optical node device # 8 can set the optical path by the wavelength; 14, and the label L4 ( ⁇ 4) It is determined that an optical path is set. Also, the optical node device # 8 is a 3R destination node when the optical node device # 5 is a 3R originating node, and originally performs 3R relay. # 7 receives a message indicating that 3R relay will be performed on its own, and determines that 3R relay will not be performed.
- the optical node device # 9 which has received the optical path setting request from the optical node device # 8, recognizes that the optical node device # 9 itself can set the optical path by using the wavelength ⁇ 4, and the label L4 It is determined that the optical path is set according to (A4). Also, the optical node device # 9 is a 3R origin node, but belongs to the 3R section where the next hop is the destination node and the self node is the 3R destination node. In some cases, the optical node device # 9 determines not to implement the 3R relay because it determines that it does not perform the 3R relay.
- the optical node device # 10 which has received the optical path setting request from the optical node device # 9, recognizes that the optical node device # 10 can set the optical path by using the wavelength ⁇ 4, and according to the label L4 ( ⁇ 4). It is determined that an optical path is to be set. Also, since optical node device # 10 is a destination node, it is determined that 3R relay will not be performed.
- the operation of the optical node device according to the 14th embodiment will be described.
- the optical node of the 14th embodiment The block diagram of the main part of the load device is common to the thirteenth embodiment shown in FIG. Also, the diagram for explaining the operation of the optical node device of the fourteenth embodiment is common to the thirteenth embodiment shown in FIG.
- an optical path is set from the optical node device # 1 as the source node to the optical node device # 10 as the destination node.
- the section where the optical node device # 1 is the 3R originating node
- the section where the optical node device # 5 is the 3R destination node
- the optical node device # 2 is the Section where optical node device # 5 is a 3R destination node
- optical node device # 4 is a 3R destination node
- optical node device # 7 is a 3R destination node
- optical node device # 5 is an optical node device # 5 3R section with 3R originating node
- optical node device # 10 with 3R destination node
- Optical node device # 8 is a 3R source node
- optical node device # 10 is a 3R destination node
- 3R section optical node device # 9 is
- the number of optical node devices # 1 is 3 so as to minimize the number of 3R operations.
- the 3R destination node when the R originating node is the optical node device # 5, and the 3R destination node when the optical node device # 5 is the 3R origin node is the optical node device. It is best to relay the 3R section with # 8 and the 3R destination node when optical node device # 8 is the 3R originating node with optical node device # 10.
- the optical node device # 1 sends an optical path setting request to the optical node device # 2.
- the optical path setting request includes a plurality of labels (label sets) indicating wavelength conversion required along the route.
- a wavelength of 11 is used between the optical node device # 1 and the optical node device # 3, and the label L1 is used.
- a wavelength of 12 is used between the optical node device # 3 and the optical node device # 5, and the label L2 is used.
- the wavelength ⁇ 3 is used between the optical node device # 5 and the optical node device # 7, and the label 3 is used.
- Between optical node device # 7 and optical node device # 10 Uses a wavelength ⁇ 4 and a label L 4.
- optical node device # 1 is a source node and a 3R source node, it is determined that 3R relay will be performed.
- the optical node device # 2 which has received the optical path setting request from the optical node device # 1, recognizes that the optical node device # 2 itself can set the optical path by the wavelength A1, and has the label L1 ( ⁇ 1 ) To set up the optical path and determine whether or not to implement 3R relay.
- optical node device # 5 which is a 3R destination node.
- the optical communication device # 2 does not perform 3R relay.
- the optical node device # 3 which has received the optical path setting request from the optical node device # 2, recognizes that it is impossible to set an optical path using the wavelength ⁇ 1, and recognizes the label L2 ( It is determined that an optical path is set by ⁇ 2). Also, since it is not the 3R originating node, it is determined that 3R relay will not be performed from the beginning.
- the optical node device # 4 which has received the optical path setting request from the optical node device # 3, recognizes that the optical node device # 4 itself can set the optical path by the wavelength ⁇ 2, and the label L2 ( ⁇ 2) to determine whether to set up the optical path, and whether or not to implement 3R relay.
- the optical node device # 4 performs the 3R relay. Also, the optical node device # 4 transmits a message to the effect that 3R relay is performed in place of the optical node device # 5, to another optical node device.
- the optical node device # 5 which has received the optical path setting request from the optical node device # 4, recognizes that it is possible to set an optical path using the wavelength; I3, and according to the label L3 (A3). It is determined that an optical path is to be set.
- the optical node device # 5 is a 3R destination node when the optical node device # 1 is a 3R originating node, and originally performs 3R relay.
- Optical node device # 4 receives a message indicating that 3R relay will be performed on its behalf, and determines that 3R relay will not be performed.
- Optical node device # Optical node device that receives an optical path setting request from 5 # 6 recognizes that it is possible to set an optical path using the wavelength ⁇ 3, and determines that an optical path is to be set based on the label L3 ( ⁇ 3). Also, since it is not a 3R originating node, it is determined that 3R relay will not be performed from the beginning.
- the optical node device # 7 which has received the optical path setting request from the optical / node device # 6, recognizes that it is impossible to set the optical path using the wavelength I3, and has received the label L4 ( ⁇ 4) It is determined that the optical path is to be set up, and the message that optical node device # 4 has carried out 3R relay in place of optical node device # 5 is received. If node # 4 is a 3R originating node, it is known that optical node # 7 is a 3R destination node as well as a 3R originating node in the next 3R section. Device # 7 determines that 3R relay will be performed. In addition, the optical node device # 7 transmits a message to the effect that the 3R relay is performed by itself to other optical node devices.
- the optical node device # 8 which has received the optical / route setting request from the optical node device # 7, recognizes that it is possible to set an optical path using the wavelength ⁇ 4, and has a label L4 ( ⁇ 4) To set an optical path. In addition, it receives a message from the optical node device # 7 indicating that the It recognizes that it belongs to the 3R section where the device # 7 is the 3R originating node and the optical node device # 10 is the 3R destination node, and determines that 3R relay will not be performed from the beginning.
- the optical node device # 9 which has received the optical path setting request from the optical node device # 8, recognizes that the optical path can be set by the wavelength; I4, and the label L4 ( 4) Judgment to set the optical path. Also, the optical node device # 7 receives a message from the optical node device # 7 that the 3R relay is to be performed, and the optical node device # 10 arrives at the 3R node with the optical node device # 7 as the 3R originating node. It recognizes that it belongs to the 3R section to be a node, and determines that 3R relay will not be performed from the beginning.
- the optical node device # 10 which has received the optical path setting request from the optical node device # 9, recognizes that it can set the optical path by using the wavelength ⁇ 4, and uses the label L4 ( ⁇ 4). It is determined that an optical path is to be set. Also, since optical node device # 10 is a destination node, it is determined that 3R relay will not be performed.
- FIG. 49 is a diagram for explaining the operation of the optical node device according to the fifteenth and sixteenth embodiments.
- the fifteenth embodiment is an embodiment in a bidirectional optical path. From the viewpoint of the bidirectional optical path, in the thirteenth embodiment, the embodiment in the downstream optical path has been described. Therefore, in a fifteenth embodiment, an embodiment regarding an upstream optical path will be described. Therefore, in the actual setting of the bidirectional optical path, the procedure described in the thirteenth embodiment and the procedure described in the fifteenth embodiment are executed almost simultaneously in parallel.
- the section where optical node device # 10 is the 3R originating node
- the section where optical node device # 6 is the 3R destination node
- the optical node device # 9 is the 3R destination node Section where 3R originating node, optical node device # 6 as 3R destination node, section where optical node device # 7 is 3R originating node, and optical node device # 4 as 3R destination node, optical node In the interval where device # 6 is the 3R originating node and optical node device # 3 is the 3R destination node, optical node device # 4 is the 3R originating node, and optical node device # 1 is the 3R destination node 3 In R section, optical node device # 3 is the 3R originating node, and optical node device # 1 is 3R This is a 3R section in which optical node device # 2 is a 3R originating node and optical node device # 1 is a 3R destination node.
- optical node device # 8 , # 10 are 10 in each case.
- the optical node device # 1 is used as the source node and the optical node device is used as the destination node.
- # 10 force ⁇
- the 3R destination node when the 3R origin node is the optical node device # 6, and the 3R destination node when the optical node device # 6 is the 3R origin node is the optical node device. It is best to relay the 3R section with the node device # 3 and the 3R destination node when the optical node device # 3 is the 3R originating node and the optical node device # 1 as the node.
- the optical node device # 1 sends an optical path setting request to the optical node device # 2.
- This optical path setting request includes a plurality of labels (label sets) that indicate the wavelength conversion required along the route.
- labels label sets
- the wavelength ⁇ 1 is used, and the label L1 is used.
- the wavelength ⁇ 2 is used between the optical node device # 3 and the optical node device # 5, and the label L2 is used.
- the wavelength 13 is used between the optical node device # 5 and the optical node device # 7, and the lapel L3 is used.
- the wavelength 14 is used between the optical node device # 7 and the optical node device # 10, and the label L4 is used.
- optical node device # 1 Since the optical node device # 1 is the source node and is the 3R destination node on the upper optical path, it determines that the 3R relay is not performed.
- the optical node device # 2 which has received the optical path setting request from the optical node device # 1, recognizes that the optical node device # 2 can set the optical path by using the wavelength A1, and the label L1 (, ⁇ 1) To set an optical path. Also, in the upstream optical path, the self-powered optical node device # 3 is a 3R originating node, and the optical node device # 1 belongs to the 3R section where the 3R destination node is a 3R destination node. 2 judges that 3R relay will not be performed.
- the optical node device # 3 which has received the optical path setting request from the optical node device # 2, recognizes that it is impossible to set an optical path using the wavelength; I1, and has received the label L2. It is determined that an optical path is to be set based on ( ⁇ 2). Also, since it is a 3R source node in a predetermined upstream optical path, it is determined that 3R relay will be performed.
- the optical node device # 4 which has received the optical path setting request from the optical node device # 3, recognizes that it is possible to set the optical path by using the wavelength 2, and labels the node 2 ( ⁇ 2 ) To set an optical path and determine whether or not to implement 3R relay since it is a 3R originating node.
- optical node device # 4 Is one hop from optical node device # 4 to optical node device # 3, which is the 3R destination node in the upstream optical path, and is therefore satisfied. continue,
- the number of remaining labels is L3 and L4, which is satisfied. Therefore, it is determined that the optical node device # 4 applies the 3 R middleware. This judgment result is transmitted to the optical node device # 3.
- the optical node device # 3 When the optical node device # 3 receives this transmission from the optical node device # 4, the optical node device # 3 cancels the decision that the optical node device # 3 will execute 3R relay.
- the optical node device # 5 which has received the optical / route setting request from the optical node device # 4, recognizes that it is impossible to set up an optical path using the wavelength ⁇ 2, and has received the label L3 ( ⁇ 3). To set an optical path. Also, since the optical node device # 5 is not a 3R originating node, it is determined that 3R relay is not performed from the beginning.
- the optical node device # 6 which has received the optical path setting request from the optical node device # 5, recognizes that the optical node device # 6 can set an optical path by using the wavelength ⁇ 3, and the label L3 ( ⁇ 3) It is determined that an optical path is set. In addition, since the self is the 3R source node in the predetermined upstream optical path, the 3R relay is performed from the beginning. Judge to implement.
- optical node device # 7 determines that the 3R relay is not to be performed.
- the optical node device # 8, which has received the optical path setting request from the optical node device # 7, receives the light / wavelength of ⁇ 4 by itself. Recognizing that it is possible to set an optical path, judge that an optical path is to be set based on the label L 4 ( ⁇ 4). Also, since optical node device # 8 is not a 3R originating node, it determines that 3R relay will not be performed from the beginning.
- the optical node device # 9 which has received the optical path setting request from the optical node device # 8, recognizes that it is possible to set the optical path by the wavelength; I4, and according to the label L4 ( ⁇ 4). Judge to set up an optical path and determine whether or not to perform 3R relay.
- optical node device # 10 which has received the optical path setting request from the optical node device # 9, recognizes that the optical node device # 10 can set the optical path by the wavelength ⁇ 4, and uses the label L4 ( ⁇ 4). It is determined that an optical path is to be set. Also, since optical node device # 10 is a destination node, it is a 3R originating node in the upper optical path, and it is determined that 3R relay will be performed.
- the operation of the optical node device according to the sixteenth embodiment will be described with reference to FIG.
- the 16th embodiment is an embodiment in a bidirectional optical path. From the viewpoint of the bidirectional optical path, the fourteenth embodiment has described the embodiment in the downstream optical path. Thus, in a sixteenth embodiment, an embodiment for an upstream optical path will be described. Therefore, in the actual setting of the bidirectional optical path, the procedure described in the fourteenth embodiment and the procedure described in the sixteenth embodiment are executed almost in parallel.
- the 3R section set on the upstream optical path shown in Fig. 49 is a section where optical node device # 10 is the 3R originating node and optical node device # 6 is the 3R destination node
- Optical node device # 9 is 3R Section where optical node device # 6 is the 3R destination node, section where optical node device # 7 is the 3R destination node, section where optical node device # 4 is the 3R destination node, and optical node device # 6 3R section where optical node device # 3 is a 3R destination node and optical node device # 4 is a 3R destination node and optical node device # 3 is a 3R destination node.
- Node device # 3 is a 3R originating node
- optical node device # 1 is a 3R destination node
- optical node device # 2 is a 3R destination node
- optical node device # 1 is a 3R destination node. This is the 3R section.
- optical node device # 8 , # 10 are 10 each.
- the source node is the optical node device # 1
- the destination node is the optical node device # 10.
- the optical node device # 10 is used to reduce the number of 3R operations to the minimum.
- the optical node device # 6 is the 3R originating node
- the 3R destination node when the optical node device # 6 is the 3R originating node is the optical node device # 3
- the optical node device # 3 is the 3R originating node. It is best to relay the 3R section where the 3R destination node of the above is the optical node device # 1.
- optical node device # 1 Since the optical node device # 1 is the source node and is the 3R destination node on the upper optical path, it determines that the 3R relay is not performed.
- the optical node device # 1 sends an optical path setting request to the optical node device # 2.
- a plurality of labels (label sets) indicating wavelength conversion required along the route are mounted.
- the wavelength ⁇ 1 is used, and the label L1 is used.
- the wavelength 12 is used between the optical node device # 3 and the optical node device # 5, and the label L2 is used.
- the wavelength ⁇ 3 is used and the label L3 is used.
- the wavelength; 14 is used, and the label L4 is used.
- the optical node device # 2 which has received the optical path setting request from the optical node device # 1, recognizes that it is possible to set the optical path by the wavelength ⁇ 1, and issues a label L1 ( ⁇ 1). It is determined that an optical path is to be set.
- the optical node device # 3 belongs to the 3R section where the optical node device # 3 is the 3R originating node and the optical node device # 1 belongs to the 3R destination node. Judge not to implement 3R relay.
- the optical node device # 3 which has received the optical path setting request from the optical node device # 2, recognizes that it is impossible to set an optical path using the wavelength ⁇ 1, and re-labels it. Judgment to set the optical path by 2 ( ⁇ 2). Also, since it is a 3R source node in a predetermined upstream optical path, it is determined that 3R relay will be performed.
- the optical node device # 4 which has received the optical path setting request from the optical node device # 3, recognizes that the optical node device # 4 itself can set an optical path by using the wavelength ⁇ 2, and the label L2 ( ⁇ 2) It is determined that an optical path is to be set, and since it is a 3R originating node, 3 Whether to perform R relay
- optical node device # 4 determines to implement 3R relay. This judgment result is transmitted to the optical node device # 3.
- the optical node device # 3 When the optical node device # 3 receives this transmission from the optical node device # 4, the optical node device # 3 cancels the decision that the optical node device # 3 will execute 3R relay.
- the optical node device # 5 which has received the optical path setting request from the optical node device # 4, recognizes that it is impossible to set an optical path using the wavelength 2 and has the label L3 ( ⁇ 3). To set an optical path. Also, since the optical node device # 5 is not a 3R originating node, it is determined that 3R relay is not performed from the beginning.
- the optical node device # 7 which has received the optical path setting request from the optical node device # 6, recognizes that it is impossible to set an optical path using the wavelength; I3, and recognizes the label L4 ( ⁇ 4 ) To set up the optical path and determine whether to implement 3R relay.
- the optical node device # 6 cancels the determination that the self determined to execute the 3R relay is performed.
- the optical node device # 8 which has received the optical path setting request from the optical node device # 7, recognizes that it is possible to set the optical path by the wavelength; I4, and the label L4 ( It is determined that an optical path is to be set according to ⁇ 4). Also, since optical node device # 8 is not a 3R originating node, it determines that 3R relay will not be performed from the beginning.
- the optical node device # 9 which has received the optical path setting request from the optical node device # 8, recognizes that the optical path can be set by the wavelength; I4, and the label L4 ( A 4) It is determined that an optical path is to be set, and whether or not to implement 3R relay is determined.
- the optical node device # 10 which has received the optical path setting request from the optical node device # 9, recognizes that the optical node device # 10 can set the optical path by the wavelength ⁇ 4, and has a label L4. ( ⁇ 4) Judgment to set the optical path. Also, since optical node device # 10 is a destination node and is a 3R originating node in the upper optical path, it is determined that 3R relay will be performed. As a result, 3R relay is performed by the optical node devices # 4, # 7, and # 10. This means that the optical node device # 4 takes over the 3R relay of the optical node device # 3, and the optical node device # 7 takes over the 3R relay of the optical node device # 6.
- FIGS. 50 and 52 are diagrams for explaining the main block configuration and operation of the optical node device according to the seventeenth embodiment.
- FIG. 51 is a block diagram of the actual measurement unit.
- the optical node device of the 17th embodiment has an actual measurement unit 218 that detects the deterioration state of the optical signal arriving at itself, and the detection result of the actual measurement unit 218 Control system that notifies the 3R relay request to the adjacent optical node device corresponding to the immediately preceding hop and the control system of the next optical node device that is the next hop.
- a 3R relay section 224 for performing 3R relay on the optical signal arriving at the terminal when receiving the 3R relay request from 7.
- the measurement section 218 actually measures the optical noise and the optical intensity of the optical signal using the optical noise observation section 225 and the optical intensity observation section 226, respectively.
- the measurement results are aggregated by the measurement data generation unit 231. Note that the actual measurement units 218 in other embodiments have the same configuration.
- the optical / guide device of the seventeenth embodiment branches and inputs the optical signal transmitted through the optical path to the actual measurement unit 218, and checks the signal deterioration state. Is observed.
- the optical node device # 4 requests the 3R relay to the optical node device # 3.
- the optical node device # 3 guides the optical path passing through itself to the 3R relay unit 224, and performs 3R relay.
- the optical node device of the seventeenth embodiment includes an actual measurement unit 218 that detects the state of deterioration of the optical signal of the upstream optical path arriving at itself, and a detection unit that detects the actual measurement unit 218. When the result detects a signal degradation, it corresponds to its own next hop.
- the control system 217 sends a 3R relay execution request to the corresponding adjacent optical node device, and the self system receives the 3R relay execution request from the control system 217 of the previous hop adjacent optical node device. And a 3R relay section 224 for performing 3R relay for the optical signal arriving at the.
- the optical node device of the seventeenth embodiment branches and inputs the optical signal transmitted through the upper optical path to the actual measurement unit 218 when an upstream optical path passing through the optical node device is set. Observation of signal degradation. Now, assuming that the optical signal degradation is detected in the optical node device # 1, the optical node device # 1 sends a 3R relay execution request to the optical node device # 2. The optical node device # 2 that has received the 3R relay execution request guides the upper optical path that passes through itself to the 3R relay unit 222, and performs 3R relay.
- the 3R relay unit 224 of each optical node device needs to relay only a part of the optical path that passes through itself.
- the 3R relay unit 224 of each optical node device needs to perform 3R relay for all of the optical paths passing therethrough. Therefore, the scale of the 3R relay unit 224 can be smaller than in the past, so that network resources can be effectively used and cost can be reduced.
- FIG. 53 is a block diagram of an optical node device having an optical switch section on the output side of the eighteenth embodiment.
- FIG. 54 is a block diagram of an optical node device having an optical switch unit on the input side according to the eighteenth embodiment.
- FIG. 55 is a block diagram of an optical node device provided with a trunk type 3R relay unit according to the eighteenth embodiment.
- the optical node device includes an actual measurement unit 218 that detects a deterioration state of an optical signal arriving at itself, and arrives at itself when a detection result of the actual measurement unit 218 detects signal deterioration. And a 3R relay section 224 for performing 3R relay for the optical signal to be transmitted.
- the operation of the optical node device according to the eighteenth embodiment will be described.
- the control system 217 issues an instruction to the selector 227 to connect the input optical signal to the 3R repeater 224.
- the optical signal subjected to the 3R relay is input to the optical switch section 228 via the 3R relay section 224, and the optical node device shown in FIG.
- the control system 217 issues an instruction to the selector 227 to connect the input optical signal to the 3R repeater 224.
- the optical signal subjected to the 3R relay is output via the 3R relay section 222.
- the detection result is transmitted to the control system 217.
- the control system 217 issues an instruction to the optical switch unit 228 to connect the input optical signal to the 3R relay unit 224.
- the optical signal output from the optical switch section 228 once, the 3R relayed optical signal via the 3R relay section 224 is input to the optical switch section 228 again.
- the optical switch unit 228 switches the 3R-repeated optical signal to the destination path.
- the same procedure is used for the upstream optical path as for the downstream optical path.
- the detailed description is omitted because it is easy to analogize that the 3R section information can be generated by using the optical node device of the 18th embodiment.
- the 3 R relay unit 2 3 4 performs 3 R relay on the optical signal of the upstream optical path arriving at itself. It is characterized by having.
- FIGS. 56 and 58 are diagrams showing the concept of 3R section information collection in the optical node device according to the nineteenth embodiment.
- FIGS. 57 and 59 are diagrams showing the 3R section information collection procedure in the optical node device of the ninth embodiment.
- the optical node device of the ninth embodiment switches and connects optical signals, and sequentially switches one optical device from the next hop adjacent optical node device to another optical node device included in the path from itself to the destination node.
- the other optical node device corresponding to the immediately preceding hop of the other optical node device at the farthest end is 3
- Means for requesting the execution of the R relay are provided in the 3R relay execution determination units 22 and 9, and the other optical node device requested to perform the 3R relay is the other optical node included in the route to the destination node.
- the test light from the node device Means for transmitting a test optical signal each time an optical path is set up one by one from the adjacent optical node device of the next hop in order to the device; and Each time a test optical signal is sent out one hop at a time from adjacent optical node devices of the next hop to other optical node devices included in the route, the other optical device at the farthest end that receives the test optical signal.
- the test light from the node device Means for receiving a report of the signal deterioration status; and, when the deterioration status of the test optical signal based on the report result received by the receiving means satisfies a predetermined deterioration condition, the other light at the farthest end.
- the 3R relay execution determining unit 229 includes means for requesting another optical node device corresponding to the immediately preceding hop of the node device to execute 3R relay.
- each optical node device is provided with a 3R relay execution determining unit 229, and when it becomes a source node or a 3R source node, the function of each of the above means is activated.
- the 3R relay execution request procedure shown in FIG. 57 is executed by the 3R relay execution determination unit 229.
- the optical node device # 1 becomes the 3R originating node, and issues a 3R relay execution request while setting the optical path.
- the 3R relay execution determination unit 229 of the optical node device # 1 sets an optical path to the optical node device # 2 one hop away from itself (step 101, step 102) ).
- the optical node device # 1 sends an optical path setting request (PATH) to the optical node device # 2.
- PATH optical path setting request
- the optical node device # 2 Upon receiving the optical path setting request (PATH), the optical node device # 2 secures resources necessary for the optical path setting and notifies the optical node device # 1 of the completion of the optical path setting (RES V ) Is sent. This establishes an optical path between optical node devices # 1 and # 2.
- the optical node device # 1 sends a test optical signal ((GHT) to the set optical path (step 103), and the test optical signal degradation status report from the optical node device # 2. (RESU LT) is received (step 104). Since no deterioration is detected in the test optical signal deterioration status report from optical node device # 2 (step 105), optical node device # 1 is an optical node device that is two hops away from itself. Then, an optical path is set (step 106, step 102). In FIG. 56, the optical node device # 1 sends an optical path setting request (PATH) to the optical node device # 3 via the optical node device # 2.
- PATH optical path setting request
- the optical node device # 3 Upon receiving the optical path setting request (PATH), the optical node device # 3 secures resources necessary for setting the optical path and notifies the optical node device # 1 of the completion of the optical path setting. (RESV) via optical node device # 2. As a result, an optical path is set between the optical node devices # 1 and # 3. Subsequently, the optical node device # 1 sends out a test optical signal (LI GHT) to the set optical path (step 103), and the test optical signal deterioration status report from the optical node device # 3. (RESULT) is received (step 104).
- LI GHT test optical signal
- REULT test optical signal deterioration status report from the optical node device # 3.
- optical node device # 1 Since no deterioration is detected in the test optical signal degradation status report from optical node device # 3 (step 105), optical node device # 1 sends a response to optical node device # 4 three hops away from itself. To set an optical path (Step 106, Step 102).
- the optical node device # 1 sends an optical path setting request (PATH) to the optical node device # 4 via the optical node devices # 2 and # 3.
- PATH optical path setting request
- the optical node device # 4 secures the resources required for setting the optical path and notifies the optical node device # 1 of the completion of the optical path setting (RESV). Is transmitted via the optical node devices # 3 and # 2. As a result, an optical path is set between the optical node devices # 1 and # 4.
- the optical node device # 1 sends out the test optical signal (LI GHT) to the set optical path (step 103), and the optical node device # 4 reports the deterioration status of the test optical signal. (RESULT) is received (step 104). Since no deterioration is detected in the test optical signal degradation status report from optical node device # 4 (step 105), optical node device # 1 sends a response to optical node device # 5 four hops away from itself. To set an optical path (step 106, step 102). In FIG. 56, the optical node device # 1 sends an optical path setting request (PATH) to the optical node device # 5 via the optical node devices # 2, # 3, and # 4.
- PATH optical path setting request
- the optical node device # 5 Upon receiving the optical path setting request (P ATH), the optical node device # 5 secures resources necessary for the optical path setting and notifies the optical node device # 1 of the completion of the optical path setting (RES V ) Via the optical node devices # 4, # 3, and # 2. Thus, an optical path is set between the optical node devices # 1 and # 5.
- the optical node device # 1 transmits a test optical signal (LI GHT) to the set optical path (step 103), and the test optical signal degradation status report from the optical node device # 5 (step 103). RESULT) (step 104). Since no deterioration is detected in the test optical signal deterioration status report from optical node device # 5 (step 105), optical node device # 1 sends a signal to optical node device # 6, which is 5 hops away from itself. _
- LI GHT test optical signal
- RESULT RESULT
- the optical node device # 1 sends an optical path setting request (PATH) to the optical node device # 6 via the optical node devices # 2, # 3, # 4, and # 5.
- PATH optical path setting request
- the optical node device # 6 secures the resources required for setting the optical path and notifies the optical node device # 1 of the completion of the optical path setting (RESV). ) Via the optical node devices # 5, # 4, # 3, and # 2. As a result, an optical path is set between the optical node devices # 1 and # 6.
- the optical node device # 1 sends a test optical signal (LI GHT) to the set optical path (step 103), and the test optical signal deterioration status report from the optical node device # 6 ( RESU LT) is received (step 104).
- the optical node device # 5 requests the optical node device # 5, which is four hops away, to perform 3R relay ( Step 107).
- the optical node device # 5 responds to the optical node device # 1 by accepting the request for performing the 3R relay from the optical node device # 1.
- the optical node device # 5 since the optical node device # 5 receives the 3R relay execution request from the optical node device # 1 (step 108), the optical node device # 5 recognizes itself as the 3R originating node, and repeats the procedure from step 101. Execute. Also, the optical node device # 1 requests the optical node device # 5 to perform the 3R relay application, and ends the processing since it has not received the request for the 3R relay from the other optical node device.
- the optical node device that performs the 3R relay in the process of setting the optical path, the optical node device that performs the 3R relay can be determined.
- all of the optical node devices # 1 to # 7 are each provided with the 3R relay execution determination unit 229.
- the test optical signal is also transmitted to the optical node device # 2 or # 3, which is expected to require no 3R relay, For these optical node devices # 2 and # 3, the test optical signal transmission procedure can be omitted.
- a test optical signal may be transmitted only to optical node devices # 5 and # 6 that are expected to need 3R relay.
- the description of the nineteenth embodiment so far is based on the down light of the unidirectional optical path or bidirectional optical path. This is an explanation when a path is assumed.
- the optical node device according to the ninth embodiment is arranged such that, when the optical node device itself is the source node, the optical node device of the next hop with respect to the other optical node devices included in the route to the destination node.
- the optical path is set sequentially one hop at a time from. 3 R relay execution determination unit 2 2 9, provided that means for sending a test optical signal to the upstream optical path when an optical path is set up when the own node is not the originating node.
- the judging unit 229 receives the test optical signal when it is the source node, and notifies the transmission source of the test optical signal of a report of the deterioration state of the test optical signal. Furthermore, the 3R relay execution determination unit 229 of the optical node device that is the source of the test optical signal, determines that the deterioration state of the test optical signal based on the notification satisfies a predetermined deterioration condition. It is determined that 3R relay will be performed on the optical signal arriving from the upper optical path. Further, the 3R-relay execution determination unit 229, when it is the optical node device that performs the 3R relay on the upstream optical path, transmits to other optical node devices included in the path from itself to the destination node.
- the optical path is sequentially set one hop at a time from the adjacent optical node device of the next hop, and the test optical signal is received, and a report of the deterioration state of the test optical signal is sent to the transmission source of the test optical signal. It is characterized by having a means to notify Actually, each optical node device is provided with a 3R relay execution determination unit 229, and when it becomes a source node, a 3R source node, or a 3R destination node, the function of each of the above means is performed. Activate.
- the 3R relay execution request procedure shown in FIG. 59 is executed by the 3R relay execution determination unit 229.
- the optical node device # 1 becomes the 3R destination node in the upper optical path and requests the 3R relay execution while setting the optical path.
- the 3R relay execution determination unit 22 of the optical node device # 1 sets an optical path to the optical node device # 2 one hop away from itself (step 1 1 1, step 1 1 2).
- the optical node device # 1 sends an optical path setting request (PATH) to the optical node device # 2.
- PATH optical path setting request
- the optical node device # 2 Upon receiving the optical path setting request (PATH), the optical node device # 2 secures resources necessary for the optical path setting and sends an optical path setting completion notification (RESV) to the optical node device # 1. Send out.
- the optical node device # 1 transmits the test optical signal (L
- Step 1 13 measure the degradation of the test optical signal from optical node device # 2, and report the measurement result (RESU LT) to optical node device # 2 (Step 1 14) . Since no deterioration is detected in the test optical signal from optical node device # 2 (steps 1 and 15), optical node device # 1 transmits an optical signal to optical node device # 3 two hops away from itself. Set the path (Step 1 16 and Step 1 1 2). In FIG. 58, the optical node device # 1 sends an optical path setting request (PATH) to the optical node device # 3 via the optical node device # 2.
- PATH optical path setting request
- the optical node equipment # 3 Upon receiving the optical path setting request (PATH), the optical node equipment # 3 secures resources necessary for the optical path setting and notifies the optical node device # 1 of the optical path setting completion notification (RES). V) via the optical node device # 2. As a result, an optical path is set between the optical node devices # 1 and # 3.
- PATH optical path setting request
- RES optical path setting completion notification
- the optical node device # 1 receives the test optical signal (the I GHT) from the set upstream optical path (step 1 13), and checks the deterioration of the test optical signal from the optical node device # 3. Measure and report the measurement result (RESU LT) to optical node device # 3 (step 114). Since no deterioration is detected in the test optical signal from the optical node device # 3 (step 1 15), the optical node device # 1 transmits an optical signal to the optical node device # 4 three hops away from itself. Set the path (Step 1 16 and Step 1 1 2). In FIG. 58, the optical node device # 1 sends an optical path setting request (PATH) to the optical node device # 4 via the optical node devices # 2 and # 3.
- PATH optical path setting request
- the optical node device # 4 Upon receiving the optical path setting request (PATH), the optical node device # 4 secures resources necessary for the optical path setting and notifies the optical node device # 1 of the completion of the optical path setting ( RES V) via the optical node devices # 3 and # 2. As a result, an optical path is set between the optical node devices # 1 and # 4.
- the optical node device # 1 receives the test optical signal (LI GHT) from the set upstream optical path (step 1 13), and measures the deterioration of the test optical signal from the optical node device # 4. Then, the actual measurement result (RESU LT) is reported to optical node device # 4 (steps 114). Deterioration is detected in the test optical signal from optical node device # 4. Since there is not (step 1 15), the optical node device # 1 sets an optical path to the optical node device # 5 four hops away from itself (step 1 16 and step 1 12). In FIG. 58, the optical node device # 1 sends an optical path setting request (PATH) to the optical node device # 5 via the optical node devices # 2, # 3, and # 4.
- PATH optical path setting request
- the optical node device # 5 Upon receiving the optical path setting request (PATH), the optical node device # 5 secures resources necessary for setting the optical path and notifies the optical node device # 1 of the completion of the optical path setting (RESV). Is transmitted via the optical node devices # 4, # 3, and # 2. As a result, an optical path is set between the optical node devices # 1 and # 5.
- RESV optical path setting request
- the optical node device # 1 transmits the test optical signal (L
- step 113 measure the degradation of the test optical signal from optical node device # 5, and report the measurement result (RESULT) to optical node device # 5 (step 114).
- step 114 No deterioration is detected in the test optical signal from optical node device # 5 (step 1 15), so optical node device # 1 transmits light to optical node device # 6 five hops away from itself.
- the optical node device # 1 sends an optical path setting request (PATH) to the optical node device # 6 via the optical node devices # 2, # 3, # 4, and # 5.
- PATH optical path setting request
- the optical node device # 6 Upon receiving the optical path setting request (PATH), the optical node device # 6 secures resources necessary for setting the optical path and notifies the optical node device # 1 of the completion of the optical path setting (R ES V) via the optical node devices # 5, # 4, # 3, and # 2. As a result, an optical path is set between the optical node devices # 1 and # 6.
- the optical node device # 1 transmits the test optical signal (L
- I GHT I GHT
- steps 11-13 measure the degradation of the test optical signal from optical node device # 6, and report the measurement result (RESULT) to optical node device # 6 (steps 114) . Since deterioration was detected in the test optical signal from optical / load device # 6 (step 1 15), it requests 3D relay to optical node device # 5 four hops away from itself. (Steps 1 17). Optical node device # 5 responds to optical node device # 1 upon receipt of the request to execute 3R relay from optical node device # 1.
- the optical node device # 5 receives the notification from the optical node device # 1 (step 1 18) Recognize that it is the 3R originating node, and execute the procedure from step 11. Also, the optical node device # 1 requests the optical node device # 5 to perform 3R relay, and terminates the process since it has not received the request for 3R relay from another optical node device. In this way, in the nineteenth embodiment, in the process of setting the optical path, the optical node device that performs the 3R relay can be determined. In the example of FIG. 58, each of the optical node devices # 1 to # 7 is provided with the 3R relay execution determination unit 229. However, for example, it is also possible to provide a configuration in which every other node is provided.
- a test optical signal was also sent to the optical node device # 2 or # 3 where 3R relay is expected to be unnecessary.
- the test optical signal transmission procedure can be omitted.
- a test optical signal may be transmitted only to the optical node devices # 5 and # 6 expected to need the 3R relay.
- FIGS. 60 and FIG. 62 are diagrams showing the concept of 3R section information collection in the optical node device of the 20th embodiment.
- FIGS. 61 and 63 are block diagrams of the optical node device of the 20th embodiment.
- the optical node device has a Q value holding unit that holds a value Q that is predetermined for each link based on the optical signal deterioration characteristics in the link between itself and an adjacent node as shown in FIG. 2 3 4 and, if it is the originating node, a P value sending unit 2 3 2 that transmits the initial value P of the subtracted value to the adjacent optical node device at the next hop, and (P-Q) or (, ⁇ '— Q) when the initial value P or the subtracted value P' already subtracted from the initial value P is received from the adjacent optical node device of
- the Q-value subtraction unit 235 to be operated is compared with the threshold value and the operation result of the Q-value subtraction unit 235 is compared with the threshold value.
- a comparison unit 236 that instructs to perform 3R relay for the optical signal arriving at itself if the threshold is less than the threshold.
- the value transmitting unit 2 3 2 sets itself as the 3R source node and sets the initial value of the subtracted value It is transmitted to the node device.
- the Q value generation unit 233 generates a Q value based on the result of referring to the parameter table 240 and the deterioration degree table 250 with respect to the optical signal deterioration degree of the link connected thereto.
- the Q value is a constant determined in proportion to the degree of deterioration, and is provided for each link.
- the Q value is set for the initial value P.
- the optical signal transmitted from the 3R emitting node is attenuated to half the intensity, and If the error rate of the optical signal sent from the node is to be doubled, if the initial value P is 100, the Q value is set to 50. This Q value is subtracted each time the signal passes through the optical node device, and it can be seen that the optical node device in which the subtraction result is equal to or less than the threshold performs 3R relay by itself. Furthermore, when the node is not the destination node of the optical path to be measured, it is determined that the node is a 3R source node and a new initial value P is transmitted.
- 3R relay implementation can be determined in the optical path setting process.
- each optical node device that has received the optical path setting request determines whether or not to perform 3R relay by itself. Procedures can be performed.
- the description of the 20th embodiment up to this point is based on the assumption of a downstream optical path of a unidirectional optical path or a bidirectional optical path. Subsequently, a case where an upstream optical path is assumed will be described with reference to FIGS. 62 and 63.
- FIG. 63 the optical node device of the 20th embodiment holds a value q that is predetermined for each link based on the optical signal degradation characteristics of the link between itself and an adjacent node.
- the q-value generation unit 3333 generates a q-value based on the result of referring to the parameter table 24.0 and the deterioration degree table 250 by referring to the parameter table 24.0 and the deterioration degree table 250 of the link connected thereto.
- the q value is a constant determined in proportion to the degree of deterioration, and is provided for each link. Further, the q value is set in the same manner as the Q value in the case of the above-described downstream optical path.
- This q value is added each time the signal passes through the optical node device, and it can be seen that the optical node device whose addition result is equal to or larger than the threshold performs 3R relay in the upper optical path. Further, when the node is not the destination node of the optical path to be measured, it is determined that the node is the 3R destination node in the upstream optical path, and a new initial value p is transmitted.
- the p-value is set to “0” in the 20th embodiment, but the p-value can be set in consideration of various conditions. For example, within the maximum length of the 3R section, the length of the set 3R section can be adjusted by the P value. That is, if the threshold is fixed, if the p value is a negative integer, the value that can be added becomes larger than when the p value is set to "0", so that the 3R section can be set longer. . Conversely, if the p-value is a positive integer, the value that can be added is smaller than when the p-value is set to "0", so the 3R section can be set shorter.
- 3R relay implementation can be determined in the optical path setting process.
- each optical node device that has received the optical path setting request determines whether or not to implement 3R relay, while checking whether or not to implement 3R relay. Setup procedure can be performed.
- FIG. 64 is a diagram showing the relationship between the network control device of the twenty-first embodiment and the optical network.
- FIG. 65 is a block diagram of the network control device of the twenty-first embodiment.
- FIG. 66 is a block diagram of the maintenance person device of the twenty-first embodiment.
- the twenty-first embodiment includes a plurality of optical node devices 1 to 8 for switching and connecting optical signals, and an optical transmission line connecting the plurality of optical node devices 1 to 8.
- the network controller 410 manages the optical network.
- the features of the 21st embodiment are, as shown in FIG. 65, based on a topology information storage unit 411 that stores topology information of an optical network, and based on input hop number information.
- the 3R section information creation section 4 1 2 and the 3R section information creation section 4 1 2 create 3R section estimation information on the topology information with the designated optical node device as the 3R originating node.
- a 3R section information changing section 413 which changes a part or all of the created 3R section estimation information on the topology information based on the input instruction, and a 3R section information changing section 413 And a 3R section information notifying section 414 for notifying the optical node device of information of the 3R section on the topology information changed by the above.
- the network control device 410 controls the optical network including the optical node devices 1 to 8 collectively. That is, each of the optical node devices 1 to 8 communicates with the network control device 410 so that the own optical node device recognizes the role assigned on the optical network and activates a function corresponding to the role. Also, the network control device 410 collects and holds various information from each of the optical node devices 1 to 8, and executes various calculations and processes necessary for optical network operation based on the collected information. I do.
- the topology information storage unit 411 holds the topology information of the optical network shown in FIG. This information is updated regularly. Alternatively, it is updated each time a change occurs in the topology.
- 3R section estimation information is created based on the input hop number information, with the designated optical / equipment device as the 3R originating node. In the example of FIG. 65, the hop number information is “2”, and the 3R emitting node is the optical node device 1.
- three 3R section estimation information of 1 ⁇ 2 ⁇ 3, 1 ⁇ 4 ⁇ 6, 1 ⁇ 5 ⁇ 7 is created on the topology information of the 3R section information creating section 4 12.
- the change information of the estimation information of the 3R section desired to be changed is input.
- the pointing force is input to change the 3R section 1-5 ⁇ 7 to 1 ⁇ 5 ⁇ 7 ⁇ 8.
- Such a change instruction is given, for example, when a user who frequently uses the sections 1 ⁇ 5 ⁇ 7 ⁇ 8 confirms that the sections 1 ⁇ 5 ⁇ 7 ⁇ 8 are 3R sections by actual measurement. .
- the 3R section information changed in this way is notified to each of the optical node devices 1 to 8 by the 3R section information notifying section 4 14. This notification may be performed every time the 3R section information is changed, or each of the optical node devices 1 to 8 may request the network control device 410 to notify as necessary.
- the hop number information is determined by estimating the 3R section and determining the hop number.
- a maintenance device having a function of automatically calculating the hop number information will be described.
- the maintainer device of the second embodiment uses a hop count information generation unit 445 that generates hop count information, and uses the topology information of the optical network in the optical network.
- Parameter table 44 that holds information on the type of optical fiber and wavelength band to be used, and a degradation degree table 4 that records the relationship between the type of optical fiber and the wavelength band and the degree of deterioration of the optical signal per unit section.
- the hop number information generation section 4450 includes information on the type of optical fiber and the wavelength band in the topology information obtained by referring to the parameter table 440, and the degradation degree table 450. The information of the number of hops is generated by comparing the type and wavelength band of the optical fiber recorded in the section with the degree of deterioration of the optical signal per unit section.
- the hop number information generation unit 445 refers to the topology information and estimates, for example, a 3R section when the optical node device 1 is a 3R originating node. For this estimation, a parameter table 450 and a deterioration degree table 450 are used.
- the procedure for estimating the number of hops when the optical node device 1 is a 3R originating node is described. I do. Assuming that an optical path from the optical node device 1 to the optical node device 4 is set, for example, the type of the optical fiber for which the optical path is set is D and the wavelength band is L from the parameter table 44. . Next, the deterioration degree of the combination of the optical fiber type D and the wavelength band L is examined with reference to the deterioration degree table 450. The result is "-1".
- the type of optical fiber in which the optical path is set is B from the parameter table 44, and the wavelength band is L. It is.
- the deterioration degree of the combination of the optical fiber type B and the wavelength band L is examined with reference to the deterioration degree table 450. The result is "one four". From the results so far, the degree of deterioration from the optical node device 1 to the optical node device 6 is “ ⁇ 5”.
- the type of optical fiber in which the optical path is set is C from the parameter table 450, and the wavelength band is set. Is L.
- the deterioration degree of the combination of the optical fiber type C and the wavelength band L is examined with reference to the deterioration degree table 450. The result is "one two”. From the results so far, the degree of deterioration from the optical node device 1 to the optical node device 8 is “17”.
- 3R relay is not required until the degree of deterioration is "1-5"
- 3R relay is not required up to the optical node device 1 ⁇ 4_> 6.
- the number of hops in the 3R section is estimated from the result obtained in this way, and the hop number is provided to the 3R section information creation unit 4122 of the network control device 410.
- the description of the 21st embodiment up to this point is based on the assumption that the downstream optical path is a unidirectional optical path or a bidirectional optical path, but the upstream optical path has the same 3R section information as the downstream optical path. Can be easily analogized, so detailed description is omitted.
- FIG. 67 and FIG. 69 are block diagrams of the network control device according to the second embodiment.
- FIGS. 68 and 70 are based on instructions from the network controller of the 22nd embodiment.
- FIG. 3 is a diagram for explaining an optical node device that performs actual measurement. The block diagram of the measurement section of the present embodiment is the same as that of FIG.
- the network control device 410 of the second embodiment has a topology information holding unit 411 that holds the topology information of the optical network, and is specified based on the input hop number information.
- the 3R section information creating section 4 1 2 that creates 3R section estimation information on the topology information with the optical node device 1 as the 3R originating node, and the 3R section information creating section 4 1 2 Optical node device so as to set a test optical path in a section on the optical network corresponding to the estimated information of the 3R section on the topology information thus obtained.
- the 3R section information changing section 4 13 and the 3R section information changing section 4 13 which change a part or all of the 3R section estimation information on the topology information created by 4 1 2
- a 3R section information notifying section 414 for notifying the optical node devices 1 to 8 of information on the changed 3R section on the topology information.
- the network control device 410 controls the optical network including the optical node devices 1 to 8 collectively. That is, each of the optical node devices 1 to 8 communicates with the network control device 410 to recognize the role assigned to the optical node device on the optical network and activate a function corresponding to the role. . Further, the network control device 410 collects and holds various information from each of the optical node devices 1 to 8, and performs various calculations and processes necessary for the operation of the optical network based on the collected information. Execute.
- the topology information holding unit 411 holds the topology information of the optical network shown in FIG. This information is updated regularly. Alternatively, it is updated each time a change occurs in the topology. Subsequently, based on this topology information, 3R section estimation information is created based on the input hop number information, with the designated optical node device as the 3R originating node. In the example of Fig. 67, the hop count information is "3" and the 3R originating node is the optical node device. Place 1
- the topological information of the 3R section information creating section 4 1 2 includes three 3R section estimation information of 1 ⁇ 2 ⁇ 3, 1 ⁇ 4 ⁇ 6 ⁇ 8, 1 ⁇ 5 ⁇ 7 ⁇ 8 Is created.
- the test optical path setting unit 4 15 sets the optical node so that the test optical path is actually set in the 3R section created by the 3R section information creation unit 4 12 and actual measurement is performed. Instruct equipment 1-8.
- the procedure for measuring the 3R section in the optical node devices 1, 4, 6, and 8 will be described with reference to FIG.
- the optical node devices 1, 4, 6, and 8 perform their roles. Recognize and activate the function.
- the optical node device 1 recognizes that it is the 3R originating node and sets up a test optical path to the optical node device 8, and it is necessary to set up a test optical path to the adjacent optical node device 4. Resource, and requests the optical node device 4 to set a test optical path.
- the optical node device 4 receives the test optical path setting request from the optical node device 1, secures resources necessary for setting the test optical path to the optical node device 6, and performs a test for the optical node device 6. Request optical path setting.
- the optical node device 6 receives the test optical path setting request from the optical node device 4, secures resources necessary for setting the test optical path to the optical node device 8, and A test optical path setting request is made.
- the optical / wired device 8 receives the test optical path request from the optical node device 6, sets the test optical path with the optical node device 6, and notifies the test optical path that the setting is completed. The setting completion notification is sent to the optical node device 6.
- the optical node device 6 receives the test optical path setting completion notification from the optical node device 8, sets the test optical path with the optical node device 4, and notifies the completion of the setting.
- a setting completion notification is sent to the optical node device 4.
- the optical node device 4 receives the test optical path setting completion notification from the optical node device 6, sets the test optical path with the optical node device 1, and notifies the test optical path that the setting has been completed.
- the setting completion notification is sent to the optical node device 1. These test optical paths are set by the optical path setting unit 4 19.
- the optical node device 1 receives the test optical path setting completion notification from the optical node device 4 and recognizes that the test optical path to the optical node device 8 has been set up.
- a test optical signal is transmitted from the transmitter (TX) of the measurement unit 4 18 to the optical path.
- This test optical signal is received by the receiver (RX) of the measurement section 418 of each of the optical node devices 4, 6, and 8.
- the measurement section 418 of each of the optical node devices 4, 6, and 8, which has received the test optical signal determines the degree of deterioration of the test optical signal and sends the result to the control system 417 of the optical node device 1. Notice.
- the control system 417 of the optical node device 1 receiving this notification recognizes that the 3R relay is not required up to the optical node devices 4 and 6, and sends the measurement result to the network controller 410. Notice. Similarly, the optical node device 1 performs the actual measurement in the section 1-2 ⁇ 3 and the section 1 ⁇ 5 ⁇ 7 ⁇ 8.
- the measurement section 418 measures the optical noise and the optical intensity of the optical signal by the optical noise observation section 225 and the optical intensity observation section 226, respectively. I do.
- the measurement results are aggregated by the measurement data generation unit 231.
- the measurement section 418 in the other embodiments has the same configuration.
- the measured data collection unit 4 16 of the network control device 4 10 collects the measurement result notified from the optical node device 1 and transmits it to the 3R section information change unit 4 13.
- the 3R section information change section 4 13 changes the 3R section estimation information created by the 3R section information creation section 4 12 based on the measurement result transmitted from the measurement data collection section 4 16.
- 3R section 1 ⁇ 4 ⁇ 6 ⁇ 8 is changed to 1-4 ⁇ 6.
- the 3R section information changed by the 3R section information change unit 4 13 is notified to the optical node devices 1 to 8 by the 3 RE inter-office tightness detection unit 4 14. This notification may be made every time the 3R section information is changed, or each of the optical node devices 1 to 8 may request the network control device 410 to notify as necessary.
- the network control device 410 controls the optical network composed of the optical node devices 1 to 8 collectively. That is, each of the optical node devices 1 to 8 communicates with the network control device 410, thereby recognizing the role assigned to the own optical node device on the optical network and activating a function corresponding to the role. . Also, the network control device 410 collects and retains various information from each of the optical node devices 1 to 8 and, based on the collected information, performs necessary operations for the optical network. Perform various calculations and operations.
- the topology information holding unit 411 holds the topology information of the optical network shown in FIG. This information is updated regularly. Alternatively, it is updated every time a change occurs in the topology. Subsequently, based on the topology information, 3R section estimation information is generated based on the input hop number information, with the designated optical node device as the 3R originating node. In the example of FIG. 69, the hop number information is “3”, and the 3R originating nodes are the optical node devices 3 and 8.
- test optical path setting section 4 15 sets the optical path so that the test optical path is actually set in the 3R section created by the 3R section information creating section 4 12 and actual measurement is performed. Instruct devices 1-8.
- the optical node devices 1, 4, 6, and 8 When an instruction from the test optical path setting unit 415 arrives at the control system 417 of each of the optical node devices 1, 4, 6, and 8, the optical node devices 1, 4, 6, and 8 perform their roles. Recognize and activate the function. In other words, the optical node device 1 recognizes that it is the 3R destination / node of the upstream optical path, and sets up a test optical path up to the optical / node device 8, so that the optical node device 4 can reach the adjacent optical node device 4. The resources necessary for setting the test optical path are secured, and a request for setting the test optical path is made to the optical node device 4.
- the optical node device 4 receives the test optical path setting request from the optical node device 1, secures resources necessary for setting the test optical path to the optical node device 6, and Make a test optical path setting request.
- the optical node device 6 receives the test optical path setting request from the optical node device 4, secures resources necessary for setting the test optical path to the optical node device 8, and tests the optical node device 8.
- a request for optical path setting is made.
- the optical node device 8 receives a test optical path request from the optical node device 6, sets a test optical path with the optical node device 6, and sets a test optical path for notifying that the setting is completed. A completion notification is sent to the optical node device 6.
- the optical node device 6 receives the test optical path setting completion notification from the optical node device 8, and receives a test optical path with the optical node device 4. Then, a test optical path setting completion notification for notifying that the setting has been completed is made to the optical node device 4.
- the optical node device 4 receives the test optical path setting completion notification from the optical node device 6, sets the test optical path with the optical node device 1, and notifies the test optical path that the setting is completed.
- the setting completion notification is sent to the optical node device 1.
- the optical node device 1 receives the test optical path setting completion notification from the optical node device 4 and recognizes that the test optical path force up to the optical node device 8 has been set. Subsequently, the optical node device 1 requests the optical node device 8 to transmit a test optical signal. Upon receiving this request, the optical node device 8 sends the transmitter of the measurement unit 418 to the test upstream optical path.
- a test optical signal is transmitted from (TX).
- This test optical signal is received by the receiver (R X) of the measurement section 4 18 of each of the optical node devices 6, 4, and 1.
- the measurement section 418 of each of the optical node devices 6 and 4 receiving the test optical signal determines the degree of deterioration of the test optical signal and notifies the control system 417 of the optical node device 1 of the result. I do.
- the control system 4 17 of the optical node device 1 that has received this notification does not need the 3R relay in the optical node devices 4 and 6, but the self (optical node device 1) power ⁇ the received test optical signal is degraded. , And that the 3R relay is required, and notifies the network controller 410 of the measurement result.
- the optical node device 1 performs the actual measurement in the section 3 ⁇ 2 ⁇ 1 between E and the section 8 ⁇ 7 ⁇ 5 ⁇ 1.
- the measured data collection unit 4 16 of the network control device 4 10 collects the measurement result notified from the optical node device 1 and transmits it to the 3R section information change unit 4 13.
- the 3R section information change section 4 13 changes the 3R section estimation information created by the 3R section information creation section 4 12 based on the measurement result transmitted from the measurement data collection section 4 16. As a result, the 3R section changes from 8 ⁇ 6 ⁇ 4 ⁇ 1 to 6-4 ⁇ 1.
- the 3R section information changed by the 3R section information changing section 4 13 is notified to the optical node devices 1 to 8 by the 3R section information notifying section 4 14. This notification may be made every time the 3R section information is changed, or each of the optical node devices 1 to 8 may request the network control device 410 to notify as necessary.
- the network control device 410 of the second embodiment first starts the 3R section information creation unit. By performing actual measurements on the estimated hop count given in 12 and making changes, it is possible to finally obtain accurate 3R section information. Therefore, as the estimated value of the number of hops to be given to the 3R section information creation unit 4 12, it is desirable to give the maximum value estimated to be a 3R section. Alternatively, a hop number slightly exceeding the maximum value may be given, and correction by actual measurement may be expected. As a result, the largest possible 3R section can be set on the optical network, and the minimum number or minimum capacity of 3R repeaters can be used to make effective use of network resources. Can be configured.
- FIG. 71 is a block diagram of a main part of the network control device of the 23rd embodiment.
- FIG. 72 is a diagram for explaining the collection of traffic demand information in the network control device of the 23rd embodiment.
- the network control device 410 of the 23rd embodiment includes a topology information holding unit 411 that holds the topology information of the optical network, and a 3R set in the optical network.
- 3 R section information holding section 4 20 that holds sections corresponding to the topology information
- traffic demand information collecting section 4 21 that collects traffic demand information in the optical network
- traffic demand information collecting section 4 2 In the section where the traffic demand increased based on the traffic demand information collected by 1, refer to the information of the 3R section information holding unit 4 20 to the section where 3R section information has not been generated yet.
- a 3R section information addition request unit 4 22 for notifying.
- the network control device 410 of the 23rd embodiment holds the already obtained 3R section information on the optical network in the 3R section information holding section 420.
- Each of the optical node devices 1 to 8 measures the traffic on the link connected to itself, and the traffic demand information collection unit 4 21 sends the optical node devices 1 to 8 notified from the optical node devices 1 to 8. Collect traffic demand information on the link connected to 8. Since the traffic measurement in each of the optical node devices 1 to 8 is a known technique, a detailed description is omitted. This traffic demand information is transmitted to the 3R section information addition request unit 422.
- the 3R section information addition request section 4 2 2 When it is detected that the traffic demand in 5 is increasing, referring to the 3R section information storage section 420, when it is found that there is no 3R section information of section 1 ⁇ 4-5 Then, the 3R section information in the section 1 ⁇ 4 to 5 is requested to the maintenance person.
- the maintenance person who has received this request generates the 3R section information using the function of the network control device described in the twenty-first or twenty-second embodiment, for example.
- FIG. 72 is a diagram for explaining traffic demand information collection in the network control device of the twenty-fourth embodiment, and is common to the twenty-third embodiment.
- FIG. 73 is a block diagram of a main part of the network control device of the twenty-fourth embodiment.
- the network control device 410 of the twenty-fourth embodiment includes a topology information holding unit 411 holding topology information of the optical network, and a 3R set in the optical network.
- 3 R section information holding section 4 20 that holds sections corresponding to the topology information
- traffic demand information collecting section 4 2 1 that collects traffic demand information in the optical network
- traffic demand information collecting section 4 2 3R section information of the section for which 3R section information has not yet been generated by referring to the 3R section information holding section 4 20 in the section where the traffic demand increased based on the traffic demand information collected by 1
- the network control device 410 of the twenty-fourth embodiment holds the already obtained 3R section information on the optical network in the 3R section information holding section 420.
- Each of the optical node devices 1 to 8 measures the traffic on the link connected to itself, and the traffic demand information collection unit 4 21 transmits the optical node devices 1 to 8 notified from the optical node devices 1 to 8. Collects traffic demand information on the link connected to. Note that each optical node device 1 to 8 Since the traffic measurement is a known technique, a detailed description is omitted. This traffic demand information is transmitted to the test optical path setting unit 4 15.
- the 3R section information holding unit 4 15 Referring to 20 and if it is found that there is no 3R section information of section 1- ⁇ 4 ⁇ 5, optical node devices 1, 4, and 5 set the test optical path and actually measure 3R section information. Instruct.
- the measurement data collection unit 4 16 collects the measurement results of the 3R section information from the optical node devices 1, 4, and 5. If the actual measurement result indicates that section 1 ⁇ 4 ⁇ 5 can be set as a 3R section, section 1 ⁇ 4 ⁇ 5 is newly added to 3R section information change section 4 13 Instruct 3R section.
- the 3R section information change section 4 13 changes the 3R section information upon receipt of the instruction, instructs the 3R section information holding section 420 to change the 3R section information, and Information change is transmitted to information notification section 4 14.
- the 3R section information notification section 4 14 notifies each of the optical node devices 1 to 8 of the change.
- the description of the twenty-fourth embodiment up to this point is based on the assumption that the downstream optical path is a unidirectional optical path or a bidirectional optical path. However, the upstream optical path is also processed in the same procedure as the lower optical path. It is easy to guess that R section information can be generated, so a detailed description is omitted.
- FIGS. 74 and 75 are diagrams illustrating the main-part block configuration and operation of the optical node device according to the twenty-fifth embodiment.
- the optical node device of the twenty-fifth embodiment has an actual measurement unit 418 for detecting the deterioration state of the optical signal arriving at itself, and the detection result of the actual measurement unit 418 When signal degradation is detected, control is performed to notify the neighboring optical node device corresponding to the previous hop that the optical node device is the 3R destination node and the 3R source node in the next 3R section.
- the optical node device of the twenty-fifth embodiment holds 3R section information of the entire optical network in a 3R section information holding unit 423 by advertising between the optical node devices. Further, when an optical path passing through the optical path is set, the optical signal transmitted through the optical path is branched and input to the actual measurement unit 418 to observe the signal deterioration state. Now, assuming that the optical signal degradation is detected in the optical node device # 4, the optical node device # 3 is a 3R destination node for the optical node device # 3 with respect to the optical node device # 3. Also notifies that it is a 3R departure node in the next 3R section.
- the optical node device # 3 that has received the notification guides the optical path passing through itself to the 3R relay unit 424 to perform 3R relay. Further, the control system 417 of the optical node device # 3 notifies other optical node devices that it is both a 3R destination node and a 3R source node in the next 3R section.
- the 3R section information holding unit 423 of the optical node device that has received the advertisement updates the 3R section information held by itself.
- the optical node device of the twenty-fifth embodiment includes an actual measurement unit 418 for detecting the state of deterioration of the optical signal of the upstream optical path arriving at itself, and an II measurement unit 418 When the detection result indicates that the signal is degraded, the self-node is located on the adjacent optical node device corresponding to the next hop, and the optical node device is the 3R destination node in the upper optical path and the next 3R section.
- the 3R relay unit 4 2 4 that recognizes that it is the 3R destination node and the 3R originating node of the next 3R section, and updates its own 3R section information based on the recognition result 3 R section information holding section 4 2 3 is provided.
- the optical node device according to the twenty-fifth embodiment holds 3R section information of the entire optical network in a 3R section information holding unit 423 by advertising between the optical node devices. Also, when an upstream optical path passing through itself is set, the optical signal transmitted through the upstream optical path is measured by the actual measurement unit 4 18 And the signal is degraded. Now, assuming that the optical signal degradation is detected in the optical node device # 1, the optical node device # 1 is connected to the optical node device # 2 by the optical node device # 2. And that it is a 3R departure node in the next 3R section.
- the optical node device # 2 that has received the notification guides the upstream optical path passing through itself to the 3R relay unit 424 to perform 3R relay. Further, the control system 417 of the optical node device # 2 notifies other optical node devices that it is both a 3R destination node and a 3R originating node in the next 3R section.
- the 3R section information storage unit 423 of the optical node device that has received the advertisement updates the 3R section information held by itself.
- the following describes a situation where a change occurs in the 3R section that is set in advance as follows. For example, when a large number of new optical paths are set in one optical node device, the existing optical path is newly set. In some cases, there is noise due to crosstalk or non-linear effects due to the effect of the given optical path. In such a case, a change occurs in the 3R section. In the twenty-fifth embodiment, it is possible to flexibly cope with such a change in the 3R section. If each optical node device has a 3R relay unit 424, there is a concern that network resources can be used more effectively than in the past.
- only the selected optical node device performs the 3R relay, whereas the node device performs the 3R relay equally, so that the load during the 3R is a plurality of optical node devices.
- Network resources so that network resources can be used effectively.
- the 3R relay unit 424 of each optical node device only needs to relay the 3R of a part of the optical path passing through itself.
- the 3R relay unit 424 of each optical node device needs to perform 3R relay for all of the optical paths passing therethrough. Therefore, since the scale of the 3R relay unit 424 can be smaller than that of the conventional one, the network resources can be effectively used and the cost can be reduced.
- Figure 76 is a block diagram of the optical node device with an optical switch on the output side of the 26th embodiment.
- FIG. FIG. 77 is a block diagram of an optical node device having an optical switch unit on the input side according to the 26th embodiment.
- FIG. 78 is a block diagram of an optical node device having a trunk type 3R relay unit according to the 26th embodiment.
- the optical node device of the twenty-sixth embodiment includes an actual measurement unit 418 for detecting a deterioration state of an optical signal arriving at the self, and an own node when the detection result of the actual measurement unit 418 detects a signal deterioration.
- the 3R relay unit that recognizes both the R destination node and the 3R originating node of the next 3R section 4.2.4 and updates the 3R section information held by itself based on the recognition result 3R section information And a holding section 4 2 3.
- the optical node device that has detected the deterioration of the optical signal is the 3R destination node with respect to its own previous hop optical node device and the 3R in the next 3R section.
- the optical node device that has detected the deterioration of the optical signal is the 3R destination node in the next 3R section while the optical node device itself is the 3R destination node. Therefore, the degree of deterioration of the optical signal detected in the twenty-sixth embodiment is smaller than the degree of deterioration of the optical signal detected in the twenty-fifth embodiment.
- the degree of deterioration of the optical signal in the 25th embodiment is a problem because the optical node device of the previous hop performs 3R relay even if the deterioration is so large that it cannot be reproduced by 3R relay. There is no.
- the degree of deterioration of the optical signal in the 26th embodiment must be such that it can be reproduced by its own 3R relay.
- the operation of the optical node device according to the 26th embodiment will be described.
- the control system 417 issues an instruction to the selector 4 27 to connect the input optical signal to the 3R relay section 4 24.
- the optical signal subjected to 3R relay is input to the optical switch section 428 via the 3R relay section 424.
- the 3R section information holding unit 4 2 3 recognizes that it is the 3R destination node and the 3R originating node of the next 3R section, and updates the 3R section information held so far. I do.
- the updated 3R section information may be advertised to other optical node devices.
- the optical node device shown in FIG. 77 has a poor optical signal output from the optical switch section 428.
- the detection result is transmitted to the control system 417.
- the control system 417 issues an instruction to the selector 422 to connect the input optical signal to the 3R repeater 424.
- the optical signal subjected to the 3R relay is output via the 3R relay unit 424.
- the 3R section information holding unit 4 2 3 recognizes that it has become an optical node device that performs 3R relay, and updates the 3R section information held so far. As described in the 25th embodiment, the updated 3R section information may be advertised to other optical node devices.
- the control system 417 issues an instruction to the optical switch section 428, and connects the input optical signal to the 3R relay section 424.
- the optical switch section 428 switches the 3R-repeated optical signal to the destination path.
- the 3R section information holding unit 4 23 recognizes that it has become an optical node device that performs 3R relay, and updates the 3R section information that has been held so far. As described in the twenty-fifth embodiment, the updated 3R section information may be advertised to other optical node devices.
- the description of the 26th embodiment so far is based on the assumption of the downstream optical path of the unidirectional optical path or the bidirectional optical path. It is easy to guess that 3R section information can be generated by this, so a detailed description is omitted.
- the control system 4 17 that recognizes itself as the 3R destination node in the upstream optical path and the 3R source node in the next 3R section, and owns And a 3R section information storage unit for updating 3R section information based on the recognition result.
- FIG. 79 to FIG. Fig. 79 and Fig. 81 show the concept of 3R section information collection in the optical node device of the 27th embodiment.
- FIG. FIGS. 80 and 82 are diagrams showing the 3R section information collection procedure in the optical node device of the twenty-seventh embodiment.
- the optical node device of the twenty-seventh embodiment is an optical node device that exchanges and connects optical signals and generates 3R section information on the path from itself to the destination node, as shown in FIG.
- Means for transmitting a test optical signal each time an optical path is set up one by one from an adjacent optical node device of the next hop to another optical node device included in the path to the destination node, and Each time a test optical signal is transmitted from an adjacent optical node device of the next hop to the other optical node device included in the path to the destination node by the hopping means, the test optical signal is transmitted.
- the deterioration condition of The other optical node device corresponding to the previous hop of the farthest other optical node device is the 3R destination node and the 3R source node in the next 3R section.
- the 3R section information collecting unit 429 is provided with means for notifying that there is, and the other optical node device that has received the notification transmits the next hop to another optical node device included in the route to the destination node.
- Means for transmitting a test optical signal each time an optical path is set in order from the adjacent optical node device one hop at a time, and the other optical nodes included in the route to the destination node by the transmitting means.
- a means for notifying the node device that the other optical node device is the 3R destination node and the 3R originating node in the next 3R section is provided to the 3R section information collection unit 429. It is characterized by having. In practice, each optical node device is provided with a 3R section information collection unit 429, and when it becomes a source node or a 3R source node, the function of each of the above means Activate
- the 3R section information collection procedure shown in FIG. 80 is executed by the 3R section information collection unit 429.
- the following describes an example of a process in which one device # 1 becomes a 3R source node and generates 3R section information while setting an optical path.
- the 3R section information collection unit 429 of the optical node device # 1 sets an optical path to the optical node device # 2 one hop away from itself (step 201, step 202).
- the optical node device # 1 sends an optical path setting request (PATH) to the optical node device # 2.
- PATH optical path setting request
- the optical node device # 2 Upon receiving the optical path setting request (PATH), the optical node device # 2 secures resources necessary for setting the optical path and sends an optical path setting completion notification (RESV) to the optical node device # 1. Send out. As a result, an optical path is set between the optical node devices # 1 and # 2.
- RSV optical path setting completion notification
- the optical node device # 1 transmits a test optical signal (LI GHT) to the set optical path (step 203), and the test optical signal deterioration status report from the optical node device # 2 (step 203).
- RESULT RESULT
- step 204 Since no degradation is detected in the optical test equipment optical signal degradation status report from optical node device # 2 (step 205), optical node device # 1 transmits to optical node device # 3 two hops away from itself. Then, an optical path is set (steps 206 and 202). In FIG. 79, the optical node device # 1 sends an optical path setting request (PATH) to the optical node device # 3 via the optical node device # 2.
- PATH optical path setting request
- the optical node device # 3 Upon receiving the optical path setting request (PATH), the optical node device # 3 secures resources necessary for the optical path setting ⁇ and notifies the optical / input device # 1 of the completion of the optical path setting. (RESV) via optical node device # 2. As a result, an optical path is set between the optical node devices # 1 and # 3. Subsequently, the optical node device # 1 sends a test optical signal (LI GHT) to the set optical path (step 203), and the test optical signal degradation status report from the optical node device # 3 (step 203). RESULT) (step 204).
- LI GHT test optical signal
- RESULT RESULT
- optical node device # 1 Since no deterioration is detected in the test optical signal degradation status report from optical node device # 3 (step 205), optical node device # 1 sends a response to optical node device # 4 three hops away from itself. Set the optical path (Step 206, Step 202).
- the optical node device # 1 sends an optical path setting request (PATH) to the optical node device # 4 via the optical node devices # 2 and # 3.
- PATH optical path setting request
- the optical node device # 4 secures resources necessary for setting the optical path and
- An optical path setup completion notification (RESV) is sent to node device # 1 via optical node devices # 3 and # 2. As a result, an optical path is set between the optical node devices # 1 and # 4.
- the optical node device # 1 sends a test optical signal (LI GHT) to the set optical path (step 203), and the test optical signal degradation status report from the optical node device # 4 (step 203).
- RESU LT is received (step 204). Since no deterioration is detected in the test optical signal deterioration status report from optical node device # 4 (step 205), optical node device # 1 sends a signal to optical node device # 5 four hops away from itself.
- Set the optical path (Step 206, Step 202).
- the optical node device # 1 sends an optical path setting request (PATH) to the optical node device # 5 via the optical node devices # 2, # 3, and # 4.
- PATH optical path setting request
- the optical node device # 5 Upon receiving the optical path setting request (P ATH), the optical node device # 5 secures resources necessary for the optical path setting and notifies the optical node device # 1 of the completion of the optical path setting (RESV). Is transmitted via the optical node devices # 4, # 3, and # 2. As a result, an optical path is set between the optical node devices # 1 and # 5.
- RESV optical path setting request
- the optical node device # 1 transmits a test optical signal (LI GHT) to the set optical path (step 203), and the test optical signal deterioration status report from the optical node device # 5 (step 203).
- RESU LT is received (step 204). Since no degradation is detected in the test optical signal degradation status report from optical node device # 5 (step 205), optical node device # 1 sends an optical signal to optical node device # 6, which is 5 hops away from itself.
- Set the path (Step 206, Step 202) o In Figure 79, the optical node device # 1 sends the optical path setting request (PATH) via the optical node devices # 2, # 3, # 4, and # 5. Send to node device # 6.
- the optical node device # 6 Upon receiving the optical path setting request (PATH), the optical node device # 6 secures the resources required for setting the optical path and notifies the optical node device # 1 of the completion of the optical path setting (RESV). ) Via the optical node devices # 5, # 4, # 3, and # 2. As a result, an optical path is set between the optical node devices # 1 and # 6.
- the optical node device # 1 transmits a test optical signal (LI GHT) to the set optical path (step 203), and the test optical signal from the optical node device # 6 is inferior.
- Receive the activation status report (RESU LT) step 204.
- the optical node device # 5 is 3 R away from the optical node device # 5 four hops away from itself. It notifies that it is both a destination node and a 3R originating node in the next 3R section (status notification) (step 207).
- the optical node device # 5 is itself a 3R destination node with respect to the optical node device # 1 and the next 3R section
- the optical node device # 5 recognizes itself as the 3R originating node by the notification from the optical node device # 1 (step 208), and executes the procedure from step 201. Further, the optical node device # 1 notifies the optical node device # 5 that the optical node device # 5 is the 3R destination node and the 3R source node in the next 3R section, and notifies the other optical node. Since the optical node device # 1 is not notified that the optical node device # 1 is the 3R destination node and is the 3R source node in the next 3R section, the process ends.
- the 3R section information can be collected while determining the optical node device that performs the 3R relay.
- all the optical node devices # 1 to # 7 have 3R section information collection units.
- test optical signal is also sent to the optical node device # 2 or # 3 which is expected to not need the 3R relay.
- the test optical signal transmission procedure can be omitted.
- a test optical signal may be transmitted only to the optical node devices # 5 and # 6 expected to need the 3R relay.
- the optical node device is an optical node device that generates 3R section information on a route from a source node to a destination node.
- a 3R section information collection unit 429 is provided that sequentially sets an optical path one hop at a time from the next hop adjacent optical node device to other optical node devices included in the route. Is the self Means for sending a test optical signal to the upstream optical path when an optical path is set up when the node is not the source node.
- the 3R section information collection unit 429 of the transmission device when the degradation state of the test optical signal based on the notification satisfies a predetermined degradation condition, determines that the node is the 3R source node in the upper optical path and that the Equipped with means for recognizing that it is a 3R destination node in the section, and also recognized that it is the 3R destination node in the previous 3R section as well as the 3R source node in the upstream optical path.
- the 3R section information collection unit 429 of the optical node device The optical path is set for each of the other optical node devices included in the route to the next optical node device one by one in order from the adjacent optical node device of the next hop, and the test optical signal is received and the test optical signal is received.
- each optical node device has a 3R section information collection unit 429, and when it becomes a source node, a 3R source node, or a 3R destination node, it activates the functions of the above means. Let me do it.
- the optical node device # 1 becomes the 3R destination node in the upstream optical path, and while setting the optical path,
- optical node device # 1 sends an optical path setup request (PATH) to optical node device # 2.
- PATH optical path setting request
- the optical node device # 2 secures resources necessary for setting the optical path and notifies the optical node device # 1 of the completion of the optical path setting (RESV). Is sent.
- An optical path is set between the two.
- the optical node device # 1 transmits the test optical signal (L
- step 213 the test optical signal from optical node device # 2 Deterioration is measured and the measurement result (RESU LT) is reported to optical node device # 2 (step 214). Since no deterioration is detected in the test optical signal from the optical node device # 2 (step 215), the optical node device # 1 transmits the optical path to the optical node device # 3 two hops away from itself. (Step 216, Step 221). In FIG. 81, the optical node device # 1 sends an optical path setting request (PATH) to the optical node device # 3 via the optical node device # 2.
- PATH optical path setting request
- the optical node device # 3 Upon receiving the optical path setting request (PATH), the optical node device # 3 secures resources necessary for the optical path setting and notifies the optical node device # 1 of the optical path setting completion notification ( RESV) via the optical node device # 2. As a result, an optical path is set between the optical node devices # 1 and # 3.
- PATH optical path setting request
- RESV optical path setting completion notification
- the optical node device # 1 receives the test optical signal (LI GHT) from the set upstream optical path (step 213), and measures the deterioration of the test optical signal from the optical node device # 3. Then, the actual measurement result (RESU LT) is reported to the optical node device # 3 (step 214). Since no deterioration has been detected in the test optical signal from the optical node device # 3 (step 215), the optical node device # 1 returns to the optical node device # 4 three hops away from itself. To set the optical path (Step 216, Step 212). In FIG. 81, the optical node device # 1 sends an optical path setting request (PATH) to the optical / input device # 4 via the optical node devices # 2 and # 3.
- PATH optical path setting request
- the optical node device # 4 Upon receiving the optical path setting request (PATH), the optical node device # 4 secures the resources required for the optical path setting and notifies the optical node device # 1 of the optical path setting completion notification ( RES V) via the optical node devices # 3 and # 2. As a result, an optical path is set between the optical node devices # 1 and # 4.
- the optical node device # 1 receives the test optical signal (LI GHT) from the set upstream optical path (step 213), and measures the deterioration of the test optical signal from the optical node device # 4.
- the measurement result (RESULT) is reported to the optical node device # 4 (step 214). Since no deterioration is detected in the test optical signal from optical node device # 4 (step 215), optical node device # 1 has an optical path to optical node device # 5, which is four hops away from itself. (Step 216, Step 212).
- the optical node device # 1 sends an optical path setting request (PATH) to the optical node device. It is sent to the optical node device # 5 via # 2, # 3, and # 4.
- PATH optical path setting request
- the optical node device # 5 Upon receiving the optical path setting request (PATH), the optical node device # 5 secures resources necessary for setting the optical path and notifies the optical node device # 1 of the completion of the optical path setting (RESV). Is transmitted via the optical node devices # 4, # 3, and # 2. As a result, an optical path is set between the optical node devices # 1 and # 5.
- RESV optical path setting request
- the optical node device # 1 receives the test optical signal (LI GHT) from the set upstream optical path (step 21 3), and measures the deterioration of the test optical signal from the optical node device # 5.
- the actual measurement result (RESU LT) is reported to optical node device # 5 (step 214). Since no deterioration is detected in the test optical signal from optical node device # 5 (step 215), optical node device # 1 transmits to optical node device # 6, which is 5 hops away from itself.
- Set the optical path (Step 216, Step 212).
- the optical node device # 1 sends an optical path setting request (PATH) to the optical node device # 6 via the optical node devices # 2, # 3, # 4, and # 5.
- PATH optical path setting request
- the optical node device # 6 Upon receiving the optical path setting request (PATH), the optical node device # 6 secures resources necessary for setting the optical path and notifies the optical node device # 1 of the completion of the optical path setting (R ES V) via the optical node devices # 5, # 4, # 3, and # 2. As a result, an optical path is set between the optical node devices # 1 and # 6.
- the optical node device # 1 receives the test optical signal (LI GHT) from the set upstream optical path (step 213), measures the test optical signal degradation from the optical node device # 6, and measures the deterioration.
- the measurement result (RESU LT) is reported to the optical node device # 6 (Step 214). Since deterioration was detected in the test optical signal from the optical node device # 6 (step 215), the optical node device # 5 was connected to the optical node device # 5 four hops away from itself.
- the 3R originating node in the upstream optical path and the 3R destination node in the previous 3R section are notified (status notification) (step 217).
- the optical node device # 5 itself is the 3R originating node in the upstream optical path and the 3R destination node in the previous 3R section for the optical node device # 1 Respond with your consent.
- the optical node device # 5 recognizes that it is the 3R originating node and executes the procedure from step 211. I do. Also, the optical node device # 1 notifies the optical node device # 5 that the optical node device # 5 is the 3R originating node and the 3R destination node in the previous 3R section, and notifies the other. Since the optical node device # 1 has not received the notification that the optical node device # 1 is the 3R originating node and the 3R destination node in the previous 3R section, the process ends.
- optical node device # 1 when optical node device # 1 receives the test optical signals of optical node devices # 2 to # 5 arriving from the upstream optical path, it reports even if no deterioration is detected. (RESULT), but since this report only has the role of confirming the reception of the test optical signal, this reporting procedure may be omitted.
- the 3R section information can be collected while determining the optical node device that performs the 3R relay.
- all of the optical node devices # 1 to # 7 are provided with the 3R section information collection units 429, respectively.
- a test optical signal is also sent to the optical node device # 2 or # 3 which is expected to not need the 3R relay.
- the test optical signal transmission procedure can be omitted.
- a test optical signal may be transmitted only to optical node devices # 5 and # 6 expected to require 3R relay.
- FIGS. 83 and 85 show the concept of 3R section information collection in the optical node device of the twenty-eighth embodiment.
- FIGS. 84 and 86 are diagrams showing the 3R section information collection procedure in the optical node device of the 28th embodiment.
- the optical node device of the twenty-eighth embodiment operates in order from the next hop adjacent optical node device with respect to the other optical node devices included in the measured t- link from which the 3R section information is measured.
- Means for transmitting a test optical signal each time is set, and one hop from an adjacent optical node device of the next hop to another optical node device included in the measured link by the transmitting means.
- Test optical signals are transmitted in order Means for receiving a report on the deterioration status of the test optical signal from the farthest end other optical node device that has received the test optical signal every time the test optical signal is received, and the report result received by the receiving means.
- the deterioration state of the test optical signal based on the above condition satisfies a predetermined deterioration condition
- the other optical node device corresponding to the previous hop of the farthest end other optical node device is the 3R destination node and the next 3R section.
- Means for recognizing as the 3R originating node is provided in the 3R section information collecting unit 430.
- each optical node device is provided with a 3R section information collection unit 430, and activates the functions of the above-described units as needed for its own 3R section information collection.
- the 3R section information collection procedure shown in FIG. 84 is executed by the 3R section information collection unit 430.
- the process of collecting the 3R section information assuming that the optical node device # 1 has become the 3R source node will be described as an example.
- the information collection unit 430 in the 3R section of the optical node device # 1 sets a test optical path to the optical node device # 2, which is one hop away from itself (step 221, step 221). 222).
- the optical node device # 1 sends a test optical path setting request (PATH) to the optical node device # 2.
- PATH test optical path setting request
- the optical node device # 2 Upon receiving the test optical path setting request (PATH), the optical node device # 2 secures resources necessary for setting the test optical path and transmits the test optical path to the optical node device # 1. Sends a setting completion notification (RESV). As a result, a test optical path is set between the optical node devices # 1 and # 2.
- PATH test optical path setting request
- RESV setting completion notification
- the optical node device # 1 transmits a test optical signal (LI GHT) to the set test optical path (step 223), and the test optical signal degradation status report from the optical node device # 2. (RESU LT) is received (step 224).
- the test optical signal degradation status report from optical node device # 2 since no degradation was detected (step 225), optical node device # 1 is an optical node device two hops away from itself.
- Set the test optical path for 3 (Steps 226, 222).
- the optical node device # 1 sends a test optical path setting request (PATH) to the optical node device # 3 via the optical node device # 2.
- PATH test optical path setting request
- the optical node device # 3 Upon receiving the test optical path setting request (PATH), the optical node device # 3 secures resources required for setting the test optical path and sets the test optical path for the optical node device # 1. Completion notification (RE SV) via the optical node device # 2. As a result, a test optical path is set between the optical node devices # 1 and # 3.
- PATH test optical path setting request
- RE SV Completion notification
- the optical node device # 1 sends a test optical signal (LI GHT) to the set test optical path (step 223), and the test optical signal degradation status report from the optical node device # 3. (RESU LT) is received (step 224). No deterioration was detected in the test optical signal degradation status report from optical node device # 3. (Step 225), so optical node device # 1 is the optical node device # 4 three hops away from itself.
- a test optical path is set for (step 226, step 222).
- the optical node device # 1 sends a test optical path setting request (PATH) to the optical node device # 4 via the optical node devices # 2 and # 3.
- PATH test optical path setting request
- the optical node device # 4 Upon receiving the test optical path setting request (PATH), the optical node device # 4 secures the resources necessary for setting the test optical path and transmits the test optical path to the optical node device # 1.
- a setup completion notification (RESV) is sent via optical node devices # 3 and # 2. As a result, a test optical path is set between the optical node devices # 1 and # 4.
- the optical node device # 1 transmits a test optical signal (LI GHT) to the set test optical path (step 223), and the test optical signal degradation status report from the optical node device # 4. (RESU LT) is received (step 224). Since no degradation was detected in the test optical signal degradation status report from optical node device # 4 (step 225), optical node device # 1 sent a response to optical node device # 5 four hops away from itself. To set a test optical path (step 226, step 222). In FIG. 83, the optical node device # 1 sends a test optical path setting request (PATH) to the optical node device # 5 via the optical node devices # 2, # 3, and # 4.
- PATH test optical path setting request
- the optical node device # 5 Upon receiving the test optical path setting request (PATH), the optical node device # 5 secures resources required for setting the test optical path and sets the test optical path for the optical node device # 1. A completion notification (RESV) is sent via optical node devices # 4, # 3, and # 2. As a result, a test optical path is set between the optical node devices # 1 and # 5.
- PATH test optical path setting request
- RESV completion notification
- the optical node device # 1 sends out a test optical signal (LIGHT) to the set test optical path (step 223), and the test optical signal degradation status from the optical node device # 5.
- a report (RESU LT) is received (step 224).
- Optical node device Since no deterioration is detected in the test optical signal degradation status report from unit # 5 (step 225), optical node device # 1 tests optical node device # 6, which is 5 hops away from itself.
- Set the optical path for use (Step 226, Step 222).
- the optical node device # 1 sends a test optical path setting request (PATH) to the optical node device # 6 via the optical node devices # 2, # 3, # 4, and # 5.
- PATH test optical path setting request
- the optical node device # 6 Upon receiving the test optical path setting request (PATH), the optical node device # 6 secures resources necessary for setting the test optical path and sets the test optical path for the optical node device # 1.
- a completion notification (RESV) is sent via optical node devices # 5, # 4, # 3, and # 2. This sets up a test optical path between the optical node devices # 1 and # 6.
- the optical node device # 1 sends a test optical signal (LI GHT) (step 223), and receives the test optical signal deterioration status report (RESULT) from the optical node device # 6 (step 224).
- the test optical signal degradation status report from optical node device # 6 since the degradation was detected (step 225), it is recognized that optical node device # 5, which is four hops away from itself, is a 3R section (step 225). 227).
- the 3R section can be recognized by setting the test optical path.
- each of the optical node devices # 1 to # 7 is provided with the 3R section information collection unit 430.
- a configuration in which every other optical node device # 1 to # 7 is provided may be provided.
- a test optical signal is also sent to the optical node device # 2 or # 3 where 3R relay is expected to be unnecessary.
- the test optical signal transmission procedure can be omitted.
- a test optical signal may be sent only to optical node devices # 5 and # 6 that are expected to need 3R relay.
- the 3R section information collection unit 430 holds the information of the optical node device that performs the 3R relay recognized in this way. Further, the 3R section information collecting unit 430 is configured to advertise the information of the optical node device that implements the 3R relay recognized in this way to another optical node device, and the advertisement from the other optical node device. And the information of the optical node device that implements the 3R relay recognized by itself and included in the advertisement. May be configured to hold the information of the optical node device that performs the 3R relay. Thereby, each optical node device can hold the same 3R section information. Alternatively, the 3R section information collection unit 4300 can provide the network control device 410 shown in FIG.
- the network control device 410 can hold the 3R section information of the entire optical network. Prior to the optical path setting, each optical node device requests and obtains the information of the 3R section required by the network control device 410 as necessary, thereby acquiring each optical node device. The amount of 3R section information held by the device can be reduced.
- Such a network controller 410 receives the information of the optical node device that performs the 3R relay from the optical node device constituting the optical network, and retains the information so far.
- a database having a function of updating information of the R section and a function of providing a part or all of the information of the 3R section held in response to a request from the optical node device to the optical node device is provided.
- FIG. 85 The optical node device according to the 28th embodiment is arranged such that, when the optical node device itself is the source node, the adjacent optical node of the next hop with respect to the other optical node devices included in the measured link for which the 3R section information is to be measured. It has a 3R section information collection unit 430 that sets up a test upstream optical path sequentially one hop at a time from the device.
- the 3R section information collection unit of the optical node device that has this test upstream optical path set up 43 0 comprises means for transmitting a test optical signal to the test upper optical path, and furthermore, the 3R section information collection section 4 30 of the optical node device of which the self node is the source node is Means for receiving the test optical signal and notifying the source of the test optical signal of a report of the deterioration status of the test optical signal.
- the R-section information collecting unit 4330 determines whether the deterioration state of the test optical signal based on the notification is a predetermined value.
- the self-power ⁇ means for recognizing that the node is both a 3R originating node in the upstream optical path and a 3R destination node in the previous 3R section is provided.
- the 3R section information collection unit 430 of the optical node device that has recognized that the node is the R originating node and the 3R destination node in the previous 3R section is the link to be measured that is the 3R section information measurement target.
- the test optical signal is sequentially set one hop at a time from the adjacent optical node device of the next hop to the other optical node devices included in the test optical device, the test optical signal is received, and the test optical signal is A means for notifying the source of the test optical signal of the report of the deterioration status is provided.
- each optical node device is provided with a 3R section information collection unit 430, and activates the functions of the above-described units as needed for its own 3R section information collection.
- the 3R section information collection procedure shown in FIG. 86 is executed by the 3R section information collection unit 430.
- the process of collecting 3R section information assuming that the optical node device # 1 has become the 3R destination node in the upper optical path will be described as an example.
- the 3R section information collection unit 430 of the optical node device # 1 sets a language test optical path to the optical node device # 2, which is one hop away from itself (steps 231 and 231). 232).
- the optical node device # 1 sends a test optical path setting request (PATH) to the optical node device # 2.
- PATH test optical path setting request
- the optical node device # 2 Upon receiving the test optical path setting request (PATH), the optical node device # 2 secures the resources required for setting the test optical path, and transmits the test light to the optical node device # 1. Sends a path setup completion notification (RESV). As a result, a test optical path is set between the optical node devices # 1 and # 2.
- PATH test optical path setting request
- RESV path setup completion notification
- the optical node device # 1 receives the test optical signal (LI GHT) from the set up optical path for test (step 233), and the optical signal degradation for the language test from the optical node device # 2. And reports the measurement result (RESULT) to optical node device # 2 (step 234). Since no deterioration is detected in the test optical signal from the optical node device # 2 (step 235), the optical node device # 1 sends the test optical signal to the optical node device # 3 two hops away from itself. Set the path (step 236, step 232). In FIG. 85, the optical node device # 1 sends a test optical path setup request (PATH) to the optical node device # 3 via the optical node device # 2.
- PATH test optical path setup request
- the optical node device # 3 Upon receiving the test optical path setting request (PATH), the optical node device # 3 secures resources necessary for setting the test optical path and transmits the test optical path to the optical node device # 1. Sends a notification of completion of network setting (RESV) via optical node device # 2. As a result, a test optical path is set between the optical node devices # 1 and # 3.
- PATH test optical path setting request
- RESV network setting
- the optical node device # 1 receives the test optical signal (LI GHT) from the set up test optical path (step 233), and measures the test optical signal degradation from the optical node device # 3.
- the actual measurement result (RESU LT) is reported to optical node device # 3 (step 234). Since no deterioration has been detected in the test optical signal from optical node device # 3 (step 235), optical node device # 1 sends the test optical signal to optical node device # 4 three hops away from itself. Set the path (step 236, step 232).
- the optical node device # 1 sends a test optical path setup request (PATH) to the optical node device # 4 via the optical node devices # 2 and # 3.
- PATH test optical path setup request
- the optical node device # 4 Upon receiving the test optical path setting request (PATH), the optical node device # 4 secures resources necessary for setting the test optical path and sets the test optical path for the optical node device # 1.
- a completion notification (RESV) is sent via optical node devices # 3 and # 2. As a result, a test optical path is set between the optical node devices # 1 and # 4.
- the optical node device # 1 receives the test optical signal (LI GHT) from the set up test optical path (step 233), and measures the test optical signal degradation from the optical node device # 4. Then, the II measurement result (RESU LT) is reported to the optical node device # 4 (step 234). Since no deterioration is detected in the test optical signal from the optical node device # 4 (step 235), the optical node device # 1 sends the test optical signal to the optical node device # 5 four hops away from itself. Set the path (step 236, step 232). In FIG. 85, the optical node device # 1 sends a test optical path setting request (PATH) to the optical node device # 5 via the optical node devices # 2, # 3, and # 4.
- PATH test optical path setting request
- the optical node device # 5 Upon receiving the test optical path setting request (PATH), the optical node device # 5 secures the resources necessary for setting the test optical path and transmits the test optical path to the optical node device # 1.
- a path setup completion notification (RESV) is sent via optical node devices # 4, # 3, and # 2. As a result, a test optical path is set between the optical node devices # 1 and # 5.
- the optical node device # 1 transmits the test optical signal from the set test optical path.
- Signal (LI GHT) (step 233), measure the test optical signal degradation from optical node device # 5, and report the measurement result (RESU LT) to optical node device # 5 (step 234). Since no deterioration is detected in the test optical signal from the optical node device # 5 (step 235), the optical node device # 1 sends the test optical signal to the optical node device # 6 five hops away from itself.
- Set the path step 236, step 232).
- the optical node device # 1 sends a test optical path setting request (PATH) to the optical node device # 6 via the optical node devices # 2, # 3, # 4, and # 5.
- PATH test optical path setting request
- the optical node device # 6 Upon receiving the test optical path setting request (PATH), the optical node device # 6 secures resources required for setting the test optical path and sets the test optical path for the optical node device # 1. A completion notification (RESV) is sent via optical node devices # 5, # 4, # 3, and # 2. As a result, a test optical path is set between the optical node devices # 1 and # 6.
- PATH test optical path setting request
- RESV completion notification
- the optical node device # 1 outputs the test signal from the optical path set for the test.
- Step 234 Since deterioration was detected in the test optical signal from the optical node device # 6 (step 235), the optical node device # 5, which is four hops away from itself, is recognized as a 3R section (step 237). ).
- the 3R section can be recognized by setting the test optical path.
- each of the optical node devices # 1 to # 7 is provided with the 3R section information collection unit 430.
- the 3R section information collection unit 430 it is also possible to provide a configuration in which every other optical node device # 1 to # 7 is provided.
- a test optical signal is also sent to the optical node device # 2 or # 3 where 3R relay is expected to be unnecessary.
- the test optical signal transmission procedure can be omitted. Or expect to need 3R relay
- the test optical signal may be transmitted only to the optical node devices # 5 and # 6 to be tested.
- the 3R section information collection unit 4340 holds information on the optical node device that performs the 3R relay recognized in this way. Further, the 3R section information collection unit 4340 is configured to advertise the information of the optical node device that performs the 3R relay recognized in this way to another optical node device. Receiving the advertisement from the node device and holding the information of the optical node device performing the 3R relay included in the advertisement together with the information of the optical node device performing the 3R relay recognized by itself. You can also. Thereby, each optical node device can hold the same 3R section information. Alternatively, the 3R section information collection unit 4300 can provide the network control device 410 shown in FIG.
- the network control device 410 can hold the 3R section information of the entire optical network. Prior to the optical path setting, each optical node device requests and obtains information of the 3R section required by the network control device 410 as necessary, and acquires the information. Can reduce the amount of 3R section information held by
- Such network control unit 4 1 0 3 information 3 R interval holding Li receive the information of the optical Roh once device for ⁇ the R relay 3 ⁇ 4 far from the optical node device constituting the optical network And a function of providing a part or all of the information of the 3R section held in response to a request from the optical node device to the optical node device.
- FIGS. 60 to 63 Since the basic concept of the twentieth embodiment is the same as that of the twentieth embodiment, see FIGS. 60 to 63 in which the light and node device of the present embodiment is used in the twenty twentieth embodiment. Will be explained. However, as described below, the detailed operation of each unit shown in FIGS. 60 to 63 is different from that of the 20th embodiment.
- FIGS. 60 and 62 are diagrams showing the concept of 3R section information collection in the optical node device of the twentieth embodiment.
- FIGS. 61 and 63 are block diagrams of the optical node device of the twentieth embodiment.
- the optical node device of the twentieth embodiment A Q-value holding unit 234 that holds a value Q predetermined for each link based on the optical signal degradation characteristics of the link between the two, and, if it is the originating node, to the adjacent optical node device of the next hop And a P value sending unit 2 32 that transmits the initial value P of the subtracted value from the adjacent optical node device at the previous hop and the subtracted value that has already been subtracted from the initial value P.
- the Q value subtraction unit 235 that calculates (P—Q) or (P′-Q) is compared with the calculation result of the Q value subtraction unit 235 and the threshold.
- the calculation result is transmitted to the adjacent optical node device of the next hop, and if the calculated result is equal to or smaller than the threshold value, the optical node device that has transmitted the initial value P of the subtracted value.
- a comparison unit 236 which recognizes that the node is a 3R destination node when the P value is a 3R originating node. If it recognizes itself as a 3R destination node and is not the destination node of the optical path to which the subtracted value is transmitted, it sets itself as the 3R source node and sets the initial value P of the subtracted value as the neighbor of the next hop. It is transmitted to the optical node device.
- the Q value generation unit 233 generates a Q value based on the result of referring to the parameter table 240 and the deterioration degree table 250 with respect to the optical signal deterioration degree of the link connected thereto.
- the Q value is a constant determined in proportion to the degree of deterioration, and is provided for each link.
- the Q value is set for the long term value P. For example, when the degree of optical signal conversion in the own optical node device is considered as optical signal intensity and optical noise, the optical signal transmitted from the 3R source node is attenuated to half the intensity, and the 3R source signal is attenuated. If the error rate of the optical signal transmitted from the node is to be doubled, if the initial value P is 100, the Q value is referred to 50.
- This Q value is subtracted each time the signal passes through the optical node device, and it can be seen that the optical node device whose subtraction result is equal to or smaller than the threshold value is itself a 3R destination node.
- the optical node device that has transmitted the initial value P is the 3R originating node, it recognizes that it is the 3R destination node, and holds this recognition result as 3R section information.
- each optical node device can share the same three-section information by holding this recognition result and advertising it to other optical node devices or network control devices.
- 3R section information from the node to the destination node can be collected. This 3R section information collection can be performed during the optical path setting process. That is, if the initial value P is loaded in the optical path setting request, each optical node device that has received the optical path setting request determines whether or not it is the 3R destination node and sets the optical path. Procedures can be performed.
- the optical node device holds a value q predetermined for each link based on the optical signal degradation characteristics of the link between itself and an adjacent node.
- Unit 3 3 4 if it is a source node, a p-value sending unit 3 3 2 that transmits the initial value p of the augmented value to the adjacent optical node device of the next hop, and (P + q) or (P '+ q) when the receiver receives the initial value p or the added value P' already added to the initial value p from the adjacent optical node device of the previous hop.
- Is calculated, and the result of the q-value addition unit 335 and the threshold value are compared with the threshold value.
- the optical node device that has transmitted the initial value P of the augmented value is referred to as the 3R in the upstream optical path.
- the q-value generating unit 3333 generates a q-value based on the result of referring to the parameter table 240 and the deterioration degree table 250 with respect to the degree of optical signal deterioration of the link connected thereto.
- the q value is a constant determined in proportion to the degree of deterioration, and is provided for each link.
- the q value is The Q value is set in the same way as the Q value in the case of the above-mentioned downstream optical path.
- This q value is added each time the signal passes through the optical node device, and it can be seen that the optical node device whose addition result is equal to or greater than the threshold value is itself a 3R emitting node in the upper optical path.
- the optical node device that has transmitted the initial value p is set as the 3R destination node in the upstream optical path, it recognizes and recognizes itself as the 3R source node, and recognizes this recognition result as 3R. It is stored as section information. Alternatively, by holding this recognition result and advertising to other optical node devices or network control devices, each optical node device can share the same 3R section information.
- the p-value is set to “0” in the 29th embodiment, but the p-value can be set in consideration of various conditions. For example, within the maximum length of the 3R section, the length of the generated 3R section can be adjusted according to the p-value. That is, if the threshold value is fixed, if the P value is a negative integer, the value that can be added becomes larger than when the p value is set to "0", so that the 3R section can be generated longer. . Conversely, if the p-value is a positive integer, the value that can be added is smaller than when the p-value is set to "0", so the interval between 3Rs can be generated shorter.
- 3R section information from the departure node to the destination node can be collected.
- This 3R section information collection can be performed during the optical path setting process. That is, if the initial value p is loaded in the optical path setting request, each optical node device receiving the optical path setting request determines whether or not itself is a 3R source node in the upstream optical path.
- the optical path setting procedure can be performed while performing. In the 21st to 29th embodiments, the description for the case where the lower optical path is assumed and the description for the case where the upstream optical path is assumed are separated for easy understanding. Actually, by performing these operations simultaneously, 3R section information can be simultaneously generated for the optical path in both the upstream and downstream directions.
- the present invention is used in an optical network for switching and connecting optical signals.
- it relates to an optical network including an optical node device that performs 3R relay.
- an economical optical network can be configured by effectively using network resources by using a required minimum number or required minimum capacity of 3R repeaters.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Optical Communication System (AREA)
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP04720248.6A EP1605630B1 (en) | 2003-03-14 | 2004-03-12 | Optical node device and network control device for 3r relay implementation |
JP2005503602A JP4145921B2 (ja) | 2003-03-14 | 2004-03-12 | 光ノード装置および網制御装置および保守者装置および光ネットワークおよび3r中継実施ノードの決定方法 |
CA2501888A CA2501888C (en) | 2003-03-14 | 2004-03-12 | Optical node device, network control device, maintenance-staff device, optical network, and 3r relay implementation node decision method |
US10/531,507 US7630649B2 (en) | 2003-03-14 | 2004-03-12 | Optical node device, network control device, maintenance-staff device, optical network, and 3R relay implementation node decision method |
US12/255,923 US7720390B2 (en) | 2003-03-14 | 2008-10-22 | Optical node device, network control device, maintenance-staff device, optical network, and 3R relay implementation node decision method |
US12/417,173 US8081881B2 (en) | 2003-03-14 | 2009-04-02 | Optical node device, network control device, maintenance-staff device, optical network, and 3R relay implementation node decision method |
US12/582,205 US8909042B2 (en) | 2003-03-14 | 2009-10-20 | Optical node device, network control device, maintenance-staff device, optical network, and 3R relay implementation node decision method |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-69246 | 2003-03-14 | ||
JP2003069233 | 2003-03-14 | ||
JP2003-69223 | 2003-03-14 | ||
JP2003-69233 | 2003-03-14 | ||
JP2003069216 | 2003-03-14 | ||
JP2003-69216 | 2003-03-14 | ||
JP2003069246 | 2003-03-14 | ||
JP2003069223 | 2003-03-14 |
Related Child Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10531507 A-371-Of-International | 2004-03-12 | ||
US12/255,923 Division US7720390B2 (en) | 2003-03-14 | 2008-10-22 | Optical node device, network control device, maintenance-staff device, optical network, and 3R relay implementation node decision method |
US12/582,205 Division US8909042B2 (en) | 2003-03-14 | 2009-10-20 | Optical node device, network control device, maintenance-staff device, optical network, and 3R relay implementation node decision method |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004082208A1 true WO2004082208A1 (ja) | 2004-09-23 |
Family
ID=32996201
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/003301 WO2004082208A1 (ja) | 2003-03-14 | 2004-03-12 | 光ノード装置および網制御装置および保守者装置および光ネットワークおよび3r中継実施ノードの決定方法 |
Country Status (5)
Country | Link |
---|---|
US (4) | US7630649B2 (ja) |
EP (6) | EP2713531B1 (ja) |
JP (1) | JP4145921B2 (ja) |
CA (4) | CA2818683C (ja) |
WO (1) | WO2004082208A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010062647A (ja) * | 2008-09-01 | 2010-03-18 | Hitachi Communication Technologies Ltd | 監視制御装置およびそのプログラム |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2713531B1 (en) * | 2003-03-14 | 2015-03-11 | Nippon Telegraph & Telephone Corporation | Network control device and network |
US7336617B1 (en) * | 2003-08-01 | 2008-02-26 | Verizon Laboratories Inc. | Bit-field-encoded resource record for determining a transmission path in a communications network |
US7558276B2 (en) * | 2004-11-05 | 2009-07-07 | Cisco Technology, Inc. | System and method for retrieving computed paths from a path computation element using a path key |
US20070208840A1 (en) * | 2006-03-03 | 2007-09-06 | Nortel Networks Limited | Graphical user interface for network management |
US20070206512A1 (en) * | 2006-03-03 | 2007-09-06 | Nortel Networks Limited | Network data model and topology discovery method |
DE102006018281B4 (de) * | 2006-04-20 | 2017-12-28 | Merten Gmbh | Verfahren zum Installieren eines Funksystems in einem Gebäude |
US20080002680A1 (en) * | 2006-06-30 | 2008-01-03 | Nortel Networks Limited. | Method and system for variable viability summarization in communication networks |
JP4701152B2 (ja) * | 2006-10-20 | 2011-06-15 | 富士通株式会社 | データ中継装置、データ中継方法およびデータ中継プログラム |
JP2008199311A (ja) * | 2007-02-13 | 2008-08-28 | Fujitsu Ltd | スイッチ装置およびパス監視設定方法 |
US8385739B2 (en) * | 2009-02-27 | 2013-02-26 | Futurewei Technologies, Inc. | Encoding of wavelength converter systems |
CN101908942B (zh) * | 2009-06-05 | 2014-10-08 | 华为技术有限公司 | 一种损伤信息传送方法、节点和网络系统 |
JP2011057491A (ja) | 2009-09-09 | 2011-03-24 | Panasonic Corp | ガス回収方法 |
CN102482088A (zh) | 2009-09-09 | 2012-05-30 | 松下电器产业株式会社 | 吸附材料和使用该吸附材料的氙吸附设备 |
US9607412B2 (en) * | 2010-02-04 | 2017-03-28 | Ciena Corporation | Method for rapid determination of lowest cost wavelength routes through a photonic network based on pre-validated paths |
JP5747711B2 (ja) * | 2011-07-22 | 2015-07-15 | 富士通株式会社 | ネットワーク評価装置 |
US10581736B1 (en) * | 2018-11-13 | 2020-03-03 | At&T Intellectual Property I, L.P. | Traffic matrix prediction and fast reroute path computation in packet networks |
US10735837B1 (en) * | 2019-07-11 | 2020-08-04 | Ciena Corporation | Partial activation of a media channel on channel holder-based optical links |
CN116074661B (zh) * | 2022-12-22 | 2023-08-22 | 北京邮电大学 | 基于q学习的自适应路由方法及相关设备 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0252535A (ja) * | 1988-08-17 | 1990-02-22 | Fujitsu Ltd | 全光処理中継装置 |
EP1049072A2 (en) | 1999-04-30 | 2000-11-02 | Lucent Technologies Inc. | Graphical user interface and method for modyfying pronunciations in text-to-speech and speech recognition systems |
JP2003234771A (ja) * | 2002-02-07 | 2003-08-22 | Nippon Telegr & Teleph Corp <Ntt> | 光波長パス設定方法および光ノード |
JP2003244098A (ja) * | 2002-02-13 | 2003-08-29 | Nippon Telegr & Teleph Corp <Ntt> | 光通信ネットワークおよび光ノードおよび光波長パス設定方法 |
Family Cites Families (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5189414A (en) * | 1986-09-30 | 1993-02-23 | Kabushiki Kaisha Toshiba | Network system for simultaneously coupling pairs of nodes |
US6005699A (en) * | 1992-04-08 | 1999-12-21 | Hitachi, Ltd. | Optical wavelength multiplexing system |
JP3612147B2 (ja) | 1996-07-17 | 2005-01-19 | 日本オプネクスト株式会社 | 光受信回路及び光伝送システム |
US6362905B1 (en) * | 1997-02-24 | 2002-03-26 | Hitachi, Ltd. | Optical crossconnect apparatus and optical transmission system |
JP3102379B2 (ja) | 1997-04-30 | 2000-10-23 | 日本電気株式会社 | 波長多重光伝送システム用監視制御方式 |
US7145868B2 (en) * | 1997-11-28 | 2006-12-05 | Alcatel Canada Inc. | Congestion management in a multi-port shared memory switch |
JP2000312189A (ja) * | 1999-04-28 | 2000-11-07 | Nec Corp | 光通信装置 |
EP1120925B1 (en) * | 1999-07-30 | 2007-10-17 | Mitsubishi Denki Kabushiki Kaisha | Optical amplification repeater and optical amplification repeating and transmitting system |
JP2001144693A (ja) | 1999-11-11 | 2001-05-25 | Nec Corp | 光海底ケーブルシステムおよび光海底ケーブルシステムにおける端局 |
US7095956B2 (en) * | 2000-06-08 | 2006-08-22 | Tellabs Operations, Inc. | Method and apparatus for validating a path through a switched optical network |
US6757494B2 (en) | 2000-12-22 | 2004-06-29 | Nortel Networks Limited | Wavelength routing in a photonic network |
JP3798640B2 (ja) * | 2001-03-02 | 2006-07-19 | 富士通株式会社 | 受信装置及び受信信号の波形劣化補償方法並びに波形劣化検出装置及び方法並びに波形測定装置及び方法 |
CA2451858A1 (en) | 2001-06-25 | 2003-01-03 | Corvis Corporation | Optical transmission systems, devices, and methods |
AU2002334906A1 (en) * | 2001-10-09 | 2003-04-22 | Infinera Corporation | Transmitter photonic integrated circuits (txpic) and optical transport networks employing txpics |
CA2410143C (en) | 2001-11-02 | 2010-02-02 | Nippon Telegraph And Telephone Corporation | Optical dynamic burst switch |
US20040208587A1 (en) * | 2001-12-05 | 2004-10-21 | Chang Frank Y. | Method of optical network routing |
US7190902B2 (en) | 2001-12-12 | 2007-03-13 | Lucent Technologies Inc. | Wavelength exerciser |
CA2418384A1 (en) * | 2002-02-06 | 2003-08-06 | Nippon Telegraph And Telephone Corporation | Optical network, optical cross-connect apparatus, photonic-ip network, and node |
US20030189933A1 (en) * | 2002-04-03 | 2003-10-09 | Timucin Ozugur | Shared wavelength group to differentiate label switched paths for congestion control in optical burst switching networks |
US7260327B1 (en) * | 2002-05-10 | 2007-08-21 | Alcatel Lucent | Method and apparatus for supporting operations and maintenance functionality in an optical burst switching network |
JP2004048477A (ja) | 2002-07-12 | 2004-02-12 | Fujitsu Ltd | ネットワーク設計装置 |
US7200331B2 (en) * | 2002-07-15 | 2007-04-03 | Lucent Technologies Inc. | Wavelength routing on an optical metro network subtended off an agile core optical network |
JP2004228715A (ja) * | 2003-01-20 | 2004-08-12 | Fujitsu Ltd | 光伝送システム |
EP2713531B1 (en) * | 2003-03-14 | 2015-03-11 | Nippon Telegraph & Telephone Corporation | Network control device and network |
-
2004
- 2004-03-12 EP EP13195619.5A patent/EP2713531B1/en not_active Expired - Lifetime
- 2004-03-12 CA CA 2818683 patent/CA2818683C/en not_active Expired - Lifetime
- 2004-03-12 EP EP04720248.6A patent/EP1605630B1/en not_active Expired - Lifetime
- 2004-03-12 US US10/531,507 patent/US7630649B2/en active Active
- 2004-03-12 CA CA2501888A patent/CA2501888C/en not_active Expired - Lifetime
- 2004-03-12 CA CA2819542A patent/CA2819542C/en not_active Expired - Lifetime
- 2004-03-12 WO PCT/JP2004/003301 patent/WO2004082208A1/ja active Application Filing
- 2004-03-12 EP EP13195565.0A patent/EP2713530A1/en not_active Withdrawn
- 2004-03-12 EP EP13195558.5A patent/EP2717514A1/en not_active Withdrawn
- 2004-03-12 EP EP13195550.2A patent/EP2713557B1/en not_active Expired - Lifetime
- 2004-03-12 EP EP13195555.1A patent/EP2706683B1/en not_active Expired - Lifetime
- 2004-03-12 CA CA 2818959 patent/CA2818959C/en not_active Expired - Lifetime
- 2004-03-12 JP JP2005503602A patent/JP4145921B2/ja not_active Expired - Lifetime
-
2008
- 2008-10-22 US US12/255,923 patent/US7720390B2/en not_active Expired - Lifetime
-
2009
- 2009-04-02 US US12/417,173 patent/US8081881B2/en not_active Expired - Lifetime
- 2009-10-20 US US12/582,205 patent/US8909042B2/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0252535A (ja) * | 1988-08-17 | 1990-02-22 | Fujitsu Ltd | 全光処理中継装置 |
EP1049072A2 (en) | 1999-04-30 | 2000-11-02 | Lucent Technologies Inc. | Graphical user interface and method for modyfying pronunciations in text-to-speech and speech recognition systems |
JP2003234771A (ja) * | 2002-02-07 | 2003-08-22 | Nippon Telegr & Teleph Corp <Ntt> | 光波長パス設定方法および光ノード |
JP2003244098A (ja) * | 2002-02-13 | 2003-08-29 | Nippon Telegr & Teleph Corp <Ntt> | 光通信ネットワークおよび光ノードおよび光波長パス設定方法 |
Non-Patent Citations (2)
Title |
---|
G. HJALMTYSSON ET AL.: "Smart Routers-Simple Optics : An Architecture for the Optical Internet", JOURNAL OF LIGHWAVE TECHNOLOGY, vol. 18, no. 12, December 2000 (2000-12-01), XP011450627, DOI: doi:10.1109/50.908768 |
See also references of EP1605630A4 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010062647A (ja) * | 2008-09-01 | 2010-03-18 | Hitachi Communication Technologies Ltd | 監視制御装置およびそのプログラム |
Also Published As
Publication number | Publication date |
---|---|
EP2713531B1 (en) | 2015-03-11 |
EP2713530A1 (en) | 2014-04-02 |
CA2501888A1 (en) | 2004-09-23 |
US20060056846A1 (en) | 2006-03-16 |
US20090196608A1 (en) | 2009-08-06 |
US20100040367A1 (en) | 2010-02-18 |
JPWO2004082208A1 (ja) | 2006-06-15 |
EP1605630B1 (en) | 2014-09-17 |
CA2819542A1 (en) | 2004-09-23 |
CA2819542C (en) | 2015-06-23 |
CA2818683A1 (en) | 2004-09-23 |
US7720390B2 (en) | 2010-05-18 |
CA2818683C (en) | 2015-04-28 |
US8909042B2 (en) | 2014-12-09 |
EP1605630A1 (en) | 2005-12-14 |
EP2706683B1 (en) | 2015-03-11 |
EP2706683A2 (en) | 2014-03-12 |
CA2818959A1 (en) | 2004-09-23 |
CA2501888C (en) | 2014-05-27 |
CA2818959C (en) | 2015-04-28 |
EP2713557A1 (en) | 2014-04-02 |
EP1605630A4 (en) | 2011-08-03 |
EP2713557B1 (en) | 2015-03-11 |
US20090052895A1 (en) | 2009-02-26 |
US8081881B2 (en) | 2011-12-20 |
JP4145921B2 (ja) | 2008-09-03 |
US7630649B2 (en) | 2009-12-08 |
EP2717514A1 (en) | 2014-04-09 |
EP2713531A1 (en) | 2014-04-02 |
EP2706683A3 (en) | 2014-04-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2004082208A1 (ja) | 光ノード装置および網制御装置および保守者装置および光ネットワークおよび3r中継実施ノードの決定方法 | |
US10050740B2 (en) | Scheduled light path switching in optical networks and automatic assessment of traffic impairments that would result from adding or deleting a channel in a wavelength-division multiplexed optical communication network | |
EP1335627A2 (en) | Optical network, optical cross-connect apparatus, photonic-IP network, and node | |
US8520685B2 (en) | Signal relay apparatus, node apparatus, network system, virtual-link generating method, path calculating method, and computer product | |
US8831424B2 (en) | Channel validation in optical networks using multi-channel impairment evaluation | |
JP5532348B2 (ja) | 輻輳検出方法および通信ノード | |
US8670666B2 (en) | Channel validation in optical networks using multi-channel impairment evaluation | |
CN100411349C (zh) | 光节点设备、网络控制设备、维护设备、光网及3r中继实施节点决定方法 | |
JP6022975B2 (ja) | 光ネットワークの制御装置、通信装置及び制御方法 | |
JP2012119732A (ja) | 光ネットワーク制御システムおよび方法 | |
JP4765979B2 (ja) | 光バースト交換ネットワーク間を波長パスにより中継する方法、システム及び装置 | |
Liu et al. | Experimental investigation of dynamic impairment-aware bi-directional lightpath provisioning in GMPLS-enabled optical networks | |
JP2013016951A (ja) | 光ネットワーク経路制御装置、光ネットワーク経路制御方法およびプログラム |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 2005503602 Country of ref document: JP |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BW BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE EG ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NA NI NO NZ OM PG PH PL PT RO RU SC SD SE SG SK SL SY TJ TM TN TR TT TZ UA UG US UZ VC VN YU ZA ZM ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): BW GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LU MC NL PL PT RO SE SI SK TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 20048004223 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2501888 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2004720248 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2006056846 Country of ref document: US Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 10531507 Country of ref document: US |
|
WWP | Wipo information: published in national office |
Ref document number: 2004720248 Country of ref document: EP |
|
WWP | Wipo information: published in national office |
Ref document number: 10531507 Country of ref document: US |