WO2010130177A1 - 业务连接建立方法、路径计算单元设备及网络系统 - Google Patents

业务连接建立方法、路径计算单元设备及网络系统 Download PDF

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Publication number
WO2010130177A1
WO2010130177A1 PCT/CN2010/072223 CN2010072223W WO2010130177A1 WO 2010130177 A1 WO2010130177 A1 WO 2010130177A1 CN 2010072223 W CN2010072223 W CN 2010072223W WO 2010130177 A1 WO2010130177 A1 WO 2010130177A1
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WIPO (PCT)
Prior art keywords
node
electrical relay
information
relay unit
service connection
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PCT/CN2010/072223
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English (en)
French (fr)
Inventor
韩建蕊
章发太
孙俊
高建华
资小兵
林毅
Original Assignee
华为技术有限公司
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Publication of WO2010130177A1 publication Critical patent/WO2010130177A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00Network arrangements or protocols for supporting network services or applications
    • H04L67/2866Architectures; Arrangements
    • H04L67/30Profiles
    • H04L67/303Terminal profiles
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L45/00Routing or path finding of packets in data switching networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L69/00Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
    • H04L69/24Negotiation of communication capabilities

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a service connection establishment method, a path calculation unit device, and a network system.
  • WDM optical networks can perform signal multiplexing, transmission, amplification, routing, and recovery in the optical domain.
  • the WDM network In the process of transmitting signals in a WDM optical network, there are generally some signal impairments. Therefore, the WDM network generally reduces or eliminates signal impairment introduced in the optical domain transmission through the electrical relay unit during the transmission of the signal.
  • the service data is transmitted in the WDM optical network.
  • the source node and the destination node are selected according to related information in the network, such as network topology information.
  • An electrical relay unit between one of the nodes other than the source node and the destination node respectively establishes a service connection of the source node to the electrical relay unit and another service connection of the electrical relay node to the destination node,
  • the two business connections are combined into one complete business connection. That is to say, for a service, you need to establish two service connections at a time. During maintenance, you need to maintain the relationship between the two service connections and maintain the status information of the two service connections.
  • the embodiment of the invention provides a service connection establishing method and a road capable of improving service connection reliability.
  • An embodiment of the present invention provides a method for establishing a service connection, including:
  • Acquiring information of the source node and the destination node of the service where the information of the source node and the destination node includes signal type information supported by the source node and the destination node;
  • the information of the electrical relay unit includes at least node identifier information of the electrical relay unit and a signal supported by the electrical relay unit Type information
  • An embodiment of the present invention provides a path calculation unit device, including:
  • An information acquiring unit configured to acquire information about a source node and a destination node of the service, where the information of the source node and the destination node includes signal type information supported by the source node and the destination node; And information of the electrical relay unit in the other nodes outside the destination node, where the information of the electrical relay unit includes at least node identifier information of the electrical relay unit and signal type information supported by the electrical relay unit;
  • a route obtaining unit configured to acquire a route where the first node is the source node, the last node is the destination node, and the at least one electrical relay unit of the other node is used;
  • a triggering unit configured to trigger an end-to-end service connection of the route, where the signal type information supported by the electrical relay unit that is passed by the service connection is consistent with the signal type information supported by the source node and the destination node .
  • the embodiment of the invention provides a network system, including:
  • a path calculation unit device configured to acquire information about a source node and a destination node of the service, where the information of the source node and the destination node includes signal type information supported by the source node and the destination node;
  • the information of the electrical relay unit in the node and the other nodes outside the destination node, the information of the electrical relay unit includes at least the node identification information of the electrical relay unit and the signal type information supported by the electrical relay unit;
  • a node is the source node, the last node is the destination node, and passes through a route of at least one of the other nodes; triggering establishment of the route An end-to-end service connection, wherein signal type information supported by the electrical relay unit through which the service connection passes is consistent with signal type information supported by the source node and the destination node;
  • a node device configured to establish, according to the trigger of the path calculation unit device, an end-to-end service connection that passes through one of the other nodes and reaches a route of the destination node.
  • the information of the electrical relay unit includes at least the node identification information of the electrical relay unit and the signal type information supported by the electrical relay unit.
  • the triggered establishment is an end-to-end service connection in which the first node is the source node, the last node is the destination node, and the route is through at least one of the other nodes, wherein the signal supported by the passed electrical relay unit
  • the type information is consistent with the signal type information supported by the source node and the destination node.
  • the electrical relay unit can be bypassed for rerouting, that is, The ability to form new business connections to avoid business disruptions increases the reliability of establishing business connections.
  • only one service connection is established for one service, and two service connections need to be established compared to the existing technology, and maintenance is also simpler.
  • FIG. 1 is a flowchart of a method for establishing a service connection according to Embodiment 1 of the present invention
  • FIG. 2 is a flowchart of a method for establishing a service connection according to Embodiment 2 of the present invention
  • Embodiment 3 is a schematic diagram of an application scenario of Embodiment 3 of the present invention.
  • FIG. 5 is a schematic structural diagram of a path calculation unit device according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a network system according to an embodiment of the present invention.
  • the embodiments of the present invention provide a service connection establishment method, a path calculation unit device, and a network system, which can improve service connection reliability. The details are described below separately.
  • Step 101 Acquire information about a source node and a destination node of a service, and a letter of a source node and a destination node.
  • the information includes signal type information supported by the source node and the destination node respectively;
  • Step 102 Acquire information of an electrical relay unit in other nodes except the source node and the destination node, where the information of the electrical relay unit includes at least node identifier information of the electrical relay unit and signal type information supported by the electrical relay unit.
  • Step 103 Acquire a first node as a source node, a last node as a destination node, and trigger a connection of an end-to-end service of the route by using a route of at least one electrical relay unit of the other nodes, where the service connection is established.
  • the signal type information supported by the passed electrical relay unit is consistent with the signal type information supported by the source node and the destination node.
  • the triggering establishes an end-to-end service connection of the route, where the signal type information supported by the electrical relay unit through which the service connection passes is consistent with the signal type information supported by the source node and the destination node, including:
  • the indication signaling carries the information indicating that the first node of the service connection is the source node and the last node is the destination node, and the source node and the destination through which the service connection passes
  • the information of the destination node and the information of the electrical relay node through which the service connection passes indicate that the electrical relay node selects an electrical relay unit that is consistent with the signal type information supported by the source node and the destination node.
  • the signal type information mentioned therein includes supported rate information and package information.
  • the information of the electrical relay unit further includes at least one of the following information: information of a wavelength or a wavelength range supported by the electrical relay unit, coding information supported by the electrical relay unit, modulation mode information supported by the electrical relay unit, and triggering
  • the electrical relay unit through which the established service connection passes meets at least one of the following requirements of the service connection: consistent with the wavelength or wavelength range supported by the source node and the destination node, consistent with the code supported by the source node and the destination node, and the source node It is consistent with the modulation mode supported by the destination node.
  • the consistency mentioned here is, for example, that the information is the same by default, or may be modified by the configuration to be consistent.
  • the electrical relay unit may be supported by the source node and the destination node by default.
  • the FEC (Forward Error Correction) code may also be configured to enable the electrical relay unit to support FEC encoding by modifying the FEC enable configuration.
  • the embodiment of the present invention is to obtain information of an electrical relay unit, where the information of the electrical relay unit includes at least node identification information of the electrical relay unit and electrical relay unit support.
  • the signal type information, and the triggered establishment is an end-to-end service connection in which the first node is the source node, the last node is the destination node, and the route is through at least one of the other nodes, wherein the passing electrical
  • the signal type information supported by the unit is consistent with the signal type information supported by the source node and the destination node.
  • the electrical relay unit can be bypassed for rerouting, that is, The ability to form new business connections to avoid business disruptions increases the reliability of establishing business connections.
  • only one service connection is established for one service, and two service connections need to be established compared to the prior art, and maintenance is also simpler.
  • FIG. 2 is a flowchart of a method for establishing a service connection according to Embodiment 2 of the present invention.
  • Embodiment 2 The technical solution of the embodiment of the present invention is described in more detail with respect to Embodiment 1.
  • Figure 2 mainly includes the steps:
  • Step 201 Acquire related information of the source node and the destination node of the service, and network related information.
  • an entity in the network is referred to, and the entity is referred to as a path calculation unit.
  • the path calculation unit is generally responsible for performing routing and wavelength assignment operations based on information about nodes and networks.
  • the path calculation unit may be an entity that exists independently in the network, or may be set on a related node in the network, for example, on the source node.
  • the path calculation unit when the path calculation unit receives the service request message, the source node and the destination node of the service can be known according to the service request message.
  • the nodes in the existing network use the information broadcast by the protocol such as the Interior Gateway Protocol (IGP), and the path calculation unit obtains the network topology information and the nodes in the network before receiving the service request message.
  • IGP Interior Gateway Protocol
  • Port cross capability information, wavelength information of links between nodes, and physical damage information of nodes and links (such as information such as optical power and dispersion).
  • the information obtained above can be used for routing, wavelength assignment, etc. of the service.
  • Step 202 Acquire related information of the electrical relay unit.
  • a service connection through the electrical relay unit needs to be established, so the path calculation unit needs to calculate a path through a certain electrical relay unit.
  • each electrical relay node advertises its own information, for example, by extending an existing IGP protocol, such as extending an Open Shortest Path First Protocol (OSPF), an intermediate system to an intermediate system. (IS-IS, Intermediate System to Intermediate System), etc., broadcasting information of an electrical relay unit in a network. It can also be sent to the path calculation unit through the Path Computation Element Communication Protocol (PCECP).
  • OSPF Open Shortest Path First Protocol
  • IS-IS Intermediate System to Intermediate System
  • PCECP Path Computation Element Communication Protocol
  • the extension may be information that utilizes a reserved field in the above protocol or adds a new field to carry an electrical relay unit.
  • the extension may be performed by extending a message of a related protocol, for example, extending a node attribute TLV (Type, Length, and value in a Link-state advertisements message of an OSPF protocol). (Value)
  • TLV Type, Length, and value in a Link-state advertisements message of an OSPF protocol.
  • the path calculation unit acquires information of the electrical relay unit through information published by the extended protocol such as IGP.
  • the information of the electrical relay unit includes at least location information of the electrical relay unit and signal type information supported by the electrical relay unit.
  • the location information of the electrical relay unit includes which node in the network has an electrical relay unit and which electrical relay units the node has.
  • the information about the type of the signal that can be supported by the electrical relay unit, including the rate information and the package information that can be supported, can be expressed as follows: ODU0 (Optical Channel Data Unit) / OTU0 (Optical Channel Transport Unit) Transmission unit), ODU1/OTU1, ODU2/OTU2, ODU3/OTU3, OCh (Optical Channel, optical channel) at 2.5 Gbps, OCh at 10 Gbps, OCh at 40 Gbps, etc.
  • the ODU1/OTU1 indicates the service rate of the HO-ODU1/OTU1 and supports the OTN encapsulation.
  • the OCh at 2.5 Gbps indicates that the service rate can be 2.5G and does not support the OTN encapsulation.
  • the meanings of other forms refer to the above description.
  • the information of the electrical relay unit may further include: information of a supported wavelength or wavelength range, whether to support wavelength conversion, a range of wavelength conversion supported when the wavelength conversion is supported, and supported coding information (eg, forward error correction) (FEC, Forward Error Correction), supported modulation mode information (for example, Return to Zero (RZ) mode, Non-Return to Zero (NRZ) mode).
  • FEC forward error correction
  • RZ Return to Zero
  • NRZ Non-Return to Zero
  • Step 203 Perform routing and wavelength allocation.
  • the path calculation unit performs routing and wavelength assignment operations after acquiring relevant information such as the information acquired in steps 201 and 202. It should be noted that if the path calculation unit does not establish an electrical relay The service connection of the unit can directly perform routing and wavelength allocation according to the related information obtained in step 201. If the relevant route and wavelength can be found through correlation calculation, the control plane signaling can be triggered to establish the service from the source node to the destination node. connection.
  • the service connection through the electrical relay unit needs to be established. Therefore, the path calculation unit needs to refer to the related information of the electrical relay unit obtained in step 202 at the same time.
  • the path calculation unit searches for a relay node having an electrical relay unit in a node between the source node and the destination node in the network, and further compares the signal types supported by the electrical relay unit in the found electrical relay node. Whether the signal type supported by the source node and the destination node matches, and if there is a match, the other information of the network, such as the network topology information, the connection relationship between the electrical relay node and the external link, and the like are simultaneously performed. The calculation is performed to calculate a route from the source node to the destination node and through at least one of the electrical relay units, and assign a suitable wavelength to the route.
  • the electrical relay unit may further be matched with the source node and the destination node according to other information of the electrical relay unit, and the other information includes at least one of the following information: Or information of the wavelength range, the range of wavelength conversion supported when wavelength conversion is supported, supported coding information (such as FEC coding type information), and supported modulation mode information.
  • the other information includes at least one of the following information: Or information of the wavelength range, the range of wavelength conversion supported when wavelength conversion is supported, supported coding information (such as FEC coding type information), and supported modulation mode information.
  • the path calculation unit determines the route from the source node to the destination node and through an electrical relay unit of the electrical relay node, or may be determined by other devices on the network side after determining the route. Notify the path calculation unit.
  • Step 204 Trigger to establish a service connection through the electrical relay unit.
  • the path calculation unit After completing the routing and wavelength assignment, the path calculation unit sends the road construction signaling information to the source node, and requires an end-to-end service connection.
  • the road-building signaling message carries the information about the determined route (including the source node, the electrical relay node, the destination node, and the information of other nodes passing through), and requires end-to-end service connection according to the route.
  • the route signaling message carries an attribute identifier to further explicitly indicate that the service connection is a service connection across the electrical relay unit, so that each node can quickly identify the type of service connection to be established.
  • the attribute identifier can be implemented by adding a flag bit in the road construction signaling message.
  • the road construction signaling message may have two forms, one is to directly indicate the electrical relay unit in the passed electrical relay node in the routing information, and the electrical relay unit has been selected in step 203. Another Is not directly indicating the electrical relay unit in the electrical relay node that passes through, only indicates the electrical relay node that has passed, and then the electrical relay node selects one of the qualified electrical relay units that it has.
  • the condition is that the signal type supported by the electrical relay unit is consistent with the signal type supported by the source node and the destination node, and further may be at least one of the following requirements: a wavelength or a wavelength range supported by the source node and the destination node Consistent, consistent with the encoding supported by the source node and the destination node, consistent with the modulation modes supported by the source node and the destination node.
  • the consistency mentioned here is, for example, that the information is the same by default, or may be modified by the configuration to be consistent.
  • the coding information supported by the electrical relay unit may be supported by the source node and the destination node by default.
  • the forward error correction (FEC) encoding may also be performed by modifying the FEC enable configuration to enable the electrical relay unit to support FEC encoding.
  • the establishment of the service connection according to the indication of establishing the signaling message includes performing resource reservation and cross-connection configuration.
  • the source node transmits the setup signaling message to each node according to the route, and each node receives the configuration of resource reservation and cross-connection according to the indication, until finally completing the connection with the destination node.
  • the embodiment of the present invention is to obtain information about the electrical relay unit, where the information of the electrical relay unit includes at least the node identification information of the electrical relay unit and the supported signal type information.
  • the at least one of the following information may be further included: information of a wavelength or a wavelength range supported by the electrical relay unit, encoding information supported by the electrical relay unit, and modulation mode information supported by the electrical relay unit.
  • the triggered establishment is an end-to-end service connection in which the first node is the source node, the last node is the destination node, and the route is through at least one of the other nodes, wherein the signal type supported by the passed electrical relay unit
  • the information is consistent with the signal type information supported by the source node and the destination node.
  • the electrical relay unit can be bypassed for rerouting, that is, The ability to form new business connections to avoid business disruptions increases the reliability of establishing business connections.
  • only one service connection is established for one service, and two service connections need to be established compared to the prior art, and maintenance is also simpler.
  • the electrical relay unit in the electrical relay node that passes through may be directly indicated in the routing information in the road construction signaling message, or may not directly indicate the passed power.
  • the electrical relay unit in the relay node only indicates the electrical relay node that passes through, and the electrical relay node subsequently selects one of the qualified electrical relay units that it has, so the application is more flexible. The following is a detailed description in conjunction with a specific application.
  • FIG. 3 is a schematic diagram of an application scenario of Embodiment 3 of the present invention.
  • Figure 3 includes a WDM network, which shows source node A (Node A), electrical relay node C (Node C ), and destination node Z (Node Z ).
  • the dotted line between the arrow and the arrow indicates that a plurality of nodes (the plurality of nodes are not shown in the figure) may be included in the middle.
  • the electrical relay node C is a node having an electrical relay function, which includes a plurality of electrical relay units. The user needs to establish a service connection between the source node A and the destination node Z.
  • Step 401 Acquire related information associated with establishing a service connection
  • the path calculation unit acquires network topology information, port cross-capability information of each node in the network, wavelength information of the inter-node link, and nodes and links according to the existing OSPF protocol.
  • Physical damage information, etc. eg information such as optical power, dispersion, etc.
  • the electrical relay node C also advertises its own information through the OSPF protocol, and the path calculation unit can also obtain the information of the electrical relay node C.
  • other electrical relay nodes in the network also publish their own information through OSPF protocol, etc., and the path calculation unit can also obtain the information at the same time.
  • the electrical relay node C information includes but is not limited to the following forms:
  • the node includes four electrical relay units REG1, REG2, REG3, and REG4; the supported signal types are ODU0/OTU0, ODU2/OTU2, ODU1/OTU1, and ODU3/OTU3; respectively, the wavelengths supported are Lambdal, Lambda2, Lambda3, and Lambda4;
  • Four electrical relay units support standard FEC encoding types, all supporting non-return to zero (NRZ, Non Return Zero) modulation modes.
  • Step 402 Perform routing and wavelength allocation
  • the path calculation unit receives a 10G rate between the source node A and the destination node Z. After the service request message of the service connection, the routing and wavelength assignment operations are performed according to the obtained related information.
  • the path calculation unit finds an electrical relay node having an electrical relay function in a node between the source node and the destination node in the network.
  • the electrical relay unit REG2 and the Node A and the Node Z that find the electrical relay node Node C support the same signal type ODU2/OTU2, and further have: all support the same wavelength Lambda2, both support The same rate (10G rate), both support the same coding type and support the same modulation mode, combined with other information such as network topology information, Node C's REG2 and external link connection relationship information, etc.
  • the service request calculates a route as: Node A, ..., Node C, ..., Node Z; wherein at least one electrical relay unit REG2 passes through the Node C. And, the path calculation unit allocates the wavelength Lambda2 to the route.
  • Step 403 Trigger to establish a service connection through the electrical relay unit.
  • the path calculation unit After completing the routing and wavelength assignment, the path calculation unit sends a road construction signaling message to the Node A, requesting to establish a service connection.
  • the road signaling message carries the information about the determined route (including the route is Node).
  • the road construction signaling message directly indicates the electrical relay unit in the electrical relay node that passes through the routing information, and may not directly indicate the electrical relay unit REG2 in the passed electrical relay node Node C. Only the electrical relay node Node C passing through is specified, and then the electrical relay node Node C selects one of the eligible electrical relay units, which is the signal type supported by the electrical relay unit and the Node A and The signal types supported by the Node Z are the same. Further, at least one of the following scenarios may be included: the supported wavelengths or the wavelength conversion ranges are consistent, the supported FEC coding types are consistent, and the supported modulation modes are consistent.
  • the consistency mentioned here is, for example, that the information is the same by default, or may be modified by the configuration to be consistent.
  • the electrical relay unit may be supported by the source node and the destination node by default.
  • the FEC (Forward Error Correction) code may also be configured to enable the electrical relay unit to support FEC encoding by modifying the FEC enable configuration.
  • the route signaling message carries an attribute identifier to further explicitly indicate that the service connection is a service connection across the electrical relay unit, so that each node can quickly identify the type of service connection to be established.
  • the attribute identifier can be implemented by adding a flag bit in the road construction signaling message.
  • the service is performed according to the indication of establishing the signaling message.
  • the establishment of the connection including resource reservation and cross-connection configuration.
  • the Node A transmits the setup signaling message to each node by routing, and each node receives the establishment of the service connection according to the indication, until finally completing the connection with the Node Z.
  • the third embodiment has substantially the same effect as the second embodiment, and details are not described herein again.
  • the embodiment of the present invention provides a path calculation unit device and a network system.
  • FIG. 5 is a schematic structural diagram of a path calculation unit device according to an embodiment of the present invention.
  • the path calculation unit device may be an entity that exists independently in the network, or may be set on a related node in the network.
  • the path calculation unit device includes: an information acquisition unit 51, and a route acquisition unit.
  • the information obtaining unit 51 is configured to acquire information about a source node and a destination node of the service, where the information of the source node and the destination node includes signal type information supported by the source node and the destination node respectively; acquiring the source node and the destination node Information of the electrical relay unit in the other nodes, the information of the electrical relay unit includes at least node identification information of the electrical relay unit and signal type information supported by the electrical relay unit.
  • the information of the obtained electrical relay unit may be issued by a node that includes an electrical relay unit in the other node; the issuing adopts an open shortest path first OSPF protocol, or an intermediate system to an intermediate system IS-IS protocol, Or the path calculates the PCECP protocol.
  • the route obtaining unit 52 is configured to obtain a route in which the first node is the source node, the last node is the destination node, and the at least one electrical relay unit of the other nodes is used.
  • the triggering unit 53 is configured to trigger an end-to-end service connection of the route, wherein the signal type information supported by the electrical relay unit through which the service connection passes is consistent with the signal type information supported by the source node and the destination node.
  • the signal type information mentioned therein includes supported rate information and package information.
  • the service connection triggered by the path calculation unit device in the embodiment of the present invention does not take the electrical relay unit as the first node or the last node, but spans the electrical relay unit, so when the electrical relay unit fails, the service connection can be bypassed.
  • the electrical relay unit performs re-routing, thereby forming a new service connection, thereby avoiding service interruption and improving the reliability of establishing a service connection.
  • only one service connection is established for one service, and two service connections need to be established compared to the prior art, and maintenance is also simpler.
  • the trigger unit 53 includes: a generating unit 531 and a sending unit 532.
  • the generating unit 531 is configured to generate indication signaling for establishing an end-to-end service connection of the route, where the indication signaling carries information indicating that the first node of the service connection is a source node, and the last node is a destination node, and Information of the electrical relay unit that is consistent with the signal type information supported by the source node and the destination node by the service connection;
  • the sending unit 532 is configured to send the generated indication signaling. or,
  • the generating unit 531 is configured to generate indication signaling for establishing an end-to-end service connection of the route, where the indication signaling carries information indicating that the first node of the service connection is a source node, and the last node is a destination node, and Information about the electrical relay node through which the service connection passes, instructing the electrical relay node to select an electrical relay unit that is consistent with the signal type information supported by the source node and the destination node;
  • the sending unit 532 is configured to send the generated indication signaling.
  • the route obtaining unit 52 further includes: a determining unit 521 and a determining unit 522.
  • the determining unit 521 is configured to determine whether the signal type information supported by the electrical relay unit is consistent with the signal type information supported by the source node and the destination node;
  • the determining unit 522 is configured to: when the determination result of the determining unit 521 is consistent, determine that the first node is the source node, the last node is the destination node, and is consistent with the signal type information supported by the source node and the destination node. A route of at least one electrical relay unit.
  • the information acquiring unit 51 includes: a first obtaining unit 511 and a second acquiring unit 512.
  • the first obtaining unit 511 is configured to obtain information about a source node and a destination node of the service, where the information of the source node and the destination node includes signal type information supported by the source node and the destination node.
  • a second obtaining unit 512 configured to acquire information of an electrical relay unit in other nodes except the source node and the destination node, where the information of the electrical relay unit includes node identifier information of the electrical relay unit and the electrical relay unit
  • the supported signal type information further includes at least one of the following information: information of a wavelength or a wavelength range supported by the electrical relay unit, coding information supported by the electrical relay unit, and modulation mode information supported by the electrical relay unit;
  • the electrical relay unit through which the triggering unit 53 triggers the established service connection meets at least one of the following requirements of the service connection: the wavelength or wavelength range supported by the source node and the destination node is consistent with The code supported by the source node and the destination node is consistent, and is consistent with the modulation mode supported by the source node and the destination node.
  • the consistency mentioned here is, for example, that the information is the same by default, or may be modified by the configuration to be consistent.
  • the coding information supported by the electrical relay unit may be supported by the original relay node and the destination node. Forward error correction ( FEC, Forward Error Correction) encoding, or by modifying the FEC enable configuration to enable the electrical relay unit to support FEC encoding.
  • FEC Forward error correction
  • FIG. 6 is a schematic structural diagram of a network system according to an embodiment of the present invention.
  • the network system includes: a path calculation unit device 61 and a node device 62.
  • the path calculation unit device 61 is configured to acquire information about a source node and a destination node of the service, where the information of the source node and the destination node includes signal type information supported by the source node and the destination node respectively; acquiring the source node and the destination node Information of the electrical relay unit in the other nodes, the information of the electrical relay unit includes at least node identification information of the electrical relay unit and signal type information supported by the electrical relay unit; acquiring the first node as the source node, The end node is the destination node and passes through a route of at least one of the other nodes; triggering an end-to-end service connection of the route, wherein the service connection is supported by an electrical relay unit
  • the signal type information is consistent with the signal type information supported by the source node and the destination node;
  • the node device 62 is configured to establish, according to the triggering of the path calculation unit device 61, an end-to-end service connection of a route that passes through at least one of the other nodes and reaches the destination node.
  • the node device 62 mentioned above may be a source node device or other node device.
  • the path calculation unit device 61 has the structure shown in FIG. 5 above. For details, refer to the foregoing description, and details are not described herein again.
  • the embodiment of the present invention is to obtain information of an electrical relay unit, where the information of the electrical relay unit includes at least node identification information of the electrical relay unit and signal type information supported by the electrical relay unit, and triggers Establishing an end-to-end service connection in which the first node is the source node, the last node is the destination node, and the route is through at least one of the other nodes, wherein the signal type information supported by the passed electrical relay unit It is consistent with the signal type information supported by the source node and the destination node.
  • the electrical relay unit can be bypassed for rerouting, that is, The ability to form new business connections to avoid business disruptions increases the reliability of establishing business connections.
  • only one service connection is established for one service, and two industries need to be established compared to the existing technology. Connection and maintenance are also simpler.
  • the program may be stored in a computer readable storage medium, and the storage medium may include: Read Only Memory (ROM), Random Access Memory (RAM), disk or optical disk.
  • ROM Read Only Memory
  • RAM Random Access Memory

Abstract

本发明公开了一种能够提高业务连接可靠性的业务连接建立方法。本发明还公开了路径计算单元设备及网络系统。所述方法包括:获取业务的源节点和目的节点的信息,源节点和目的节点的信息中包括源节点和目的节点各自支持 的信号类型信息;获取除源节点和目的节点外的其它节点中的电中继单元的信息,所述电中继单元的信息至少包括电中继单元的节点标识信息及电中继单元支持的信号类型信息;获取首节点为源节点、末节点为目的节点、 并通过所述其它节点中的至少一个电中继单元的一个路由;触发建立所述路由的一个端到端的业务连接,其中所述业务连接通过的电中继单元支持的信号类型信息与源节点和目的节点支持的信号类型信息一致。

Description

业务连接建立方法、 路径计算单元设备及网络系统 本申请要求于 2009 年 5 月 15 日提交中国专利局、 申请号为 200910140451.4、 发明名称为 "业务连接建立方法、 路径计算单元设备及网络 系统" 的中国专利申请的优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及通信技术领域,具体涉及一种业务连接建立方法、路径计算单 元设备及网络系统。
背景技术
随着通信技术的发展,光网络已经成为未来广域网和城域网的核心。目前, 已经出现波分复用 (WDM, Wavelength Division Multiplexing )光网络, WDM 光网络可以在光域进行信号的复用、传输、放大、 选路以及恢复。 在 WDM光 网络传输信号的过程中一般会有一些信号损伤,因此 WDM网络一般在传输信 号过程中通过电中继单元降低或者消除光域传送中引入的信号损伤。
以在 WDM光网络传输业务数据举例,现有技术中根据用户的业务请求在 建立源节点到目的节点的业务连接时,是根据网络中的相关信息例如网络拓朴 信息等选择源节点与目的节点之间的除源节点和目的节点外的一个节点中的 一个电中继单元,分别建立源节点到该电中继单元的一个业务连接以及该电中 继节点到目的节点的另一个业务连接,由这两个业务连接组合成一个完整的业 务连接。 也就是说, 对于一个业务而言, 需要一次建立两个业务连接, 在维护 时需要维护这两个业务连接的关系以及维护两个业务连接的状态信息。
在对此方法的研究和实践过程中, 本发明的发明人发现: 在现有技术中, 当电中继单元发生故障时,按照现有的重路由机制, 两个业务连接都需要进行 重路由,但由于该电中继单元分别是这两个业务连接的末节点和首节点,此时 无法进行重路由, 从而造成业务连接中断, 也就使得业务中断。 因此, 现有技 术建立的业务连接可靠性差。 发明内容
本发明实施例提供一种能够提高业务连接可靠性的业务连接建立方法、路 径计算单元设备及网络系统。
本发明实施例提供一种业务连接建立方法, 包括:
获取业务的源节点和目的节点的信息,所述源节点和目的节点的信息中包 括所述源节点和所述目的节点各自支持的信号类型信息;
获取除所述源节点和所述目的节点外的其它节点中的电中继单元的信息, 所述电中继单元的信息至少包括电中继单元的节点标识信息及电中继单元支 持的信号类型信息;
获取首节点为所述源节点、末节点为所述目的节点、并通过所述其它节点 中的至少一个电中继单元的一个路由;
触发建立所述路由的一个端到端的业务连接,其中所述业务连接通过的电 中继单元支持的信号类型信息与所述源节点和所述目的节点支持的信号类型 信息一致。
本发明实施例提供一种路径计算单元设备, 包括:
信息获取单元, 用于获取业务的源节点和目的节点的信息, 所述源节点和 目的节点的信息中包括所述源节点和所述目的节点各自支持的信号类型信息; 获取除所述源节点和所述目的节点外的其它节点中的电中继单元的信息,所述 电中继单元的信息至少包括电中继单元的节点标识信息及电中继单元支持的 信号类型信息;
路由获取单元, 用于获取首节点为所述源节点、 末节点为所述目的节点、 并通过所述其它节点中的至少一个电中继单元的一个路由;
触发单元, 用于触发建立所述路由的一个端到端的业务连接,其中所述业 务连接通过的电中继单元支持的信号类型信息与所述源节点和所述目的节点 支持的信号类型信息一致。
本发明实施例提供一种网络系统, 包括:
路径计算单元设备, 用于获取业务的源节点和目的节点的信息, 所述源节 点和目的节点的信息中包括所述源节点和所述目的节点各自支持的信号类型 信息; 获取除所述源节点和所述目的节点外的其它节点中的电中继单元的信 息,所述电中继单元的信息至少包括电中继单元的节点标识信息及电中继单元 支持的信号类型信息; 获取首节点为所述源节点、末节点为所述目的节点并通 过所述其它节点中的至少一个电中继单元的一个路由;触发建立所述路由的一 个端到端的业务连接,其中所述业务连接通过的电中继单元支持的信号类型信 息与所述源节点和所述目的节点支持的信号类型信息一致;
节点设备, 用于根据所述路径计算单元设备的触发, 建立通过所述其它节 点中的一个电中继单元并到达所述目的节点的一个路由的端到端的业务连接。
上述技术方案可以看出,本发明实施例是获取有电中继单元的信息, 所述 电中继单元的信息至少包括电中继单元的节点标识信息及电中继单元支持的 信号类型信息, 而触发建立的是首节点为源节点、末节点为目的节点并通过其 它节点中的至少一个电中继单元的一个路由的端到端的业务连接,其中所述通 过的电中继单元支持的信号类型信息与所述源节点和所述目的节点支持的信 号类型信息一致。 因为建立的业务连接不是以电中继单元为首节点或末节点, 而是跨越该电中继单元, 因此当电中继单元发生故障时,可以绕过该电中继单 元进行重路由, 也就能够形成新的业务连接, 从而避免业务中断, 也就提高了 建立业务连接的可靠性。 另外, 针对一个业务只建立一个业务连接, 相对于现 有技术需建立两个业务连接, 维护也更简单。
附图说明
为了更清楚地说明本发明实施例和现有技术中的技术方案,下面将对实施 例和现有技术描述中所需要使用的附图作简单地介绍,显而易见地, 下面描述 中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,在不付 出创造性劳动性的前提下, 还可以根据这些附图获得其它的附图。
图 1是本发明实施例一的业务连接建立方法流程图;
图 2是本发明实施例二的业务连接建立方法流程图;
图 3是本发明实施例三的应用场景示意图;
图 4是本发明实施例三的业务连接建立方法流程图;
图 5是本发明实施例的路径计算单元设备结构示意图;
图 6是本发明实施例的网络系统结构示意图。
具体实施方式
本发明实施例提供一种能够提高业务连接可靠性的业务连接建立方法、路 径计算单元设备及网络系统。 以下分别进行详细说明。
图 1是本发明实施例一的业务连接建立方法流程图, 主要包括步骤: 步骤 101、 获取业务的源节点和目的节点的信息, 源节点和目的节点的信 息中包括源节点和目的节点各自支持的信号类型信息;
步骤 102、 获取除源节点和目的节点外的其它节点中的电中继单元的信 息,电中继单元的信息至少包括电中继单元的节点标识信息及电中继单元支持 的信号类型信息;
步骤 103、 获取首节点为源节点、 末节点为目的节点、 并通过所述其它节 点中的至少一个电中继单元的一个路由,触发建立所述路由的一个端到端的业 务连接,其中业务连接通过的电中继单元支持的信号类型信息与源节点和目的 节点支持的信号类型信息一致。
其中,触发建立所述路由的一个端到端的业务连接,其中业务连接通过的 电中继单元支持的信号类型信息与源节点和目的节点支持的信号类型信息一 致包括:
发送建立所述路由的端到端的业务连接的指示信令,指示信令中携带表明 业务连接的首节点为源节点、末节点为目的节点的信息,及业务连接所通过的 与源节点和目的节点支持的信号类型信息一致的电中继单元的信息; 或者, 发送建立所述路由的端到端的业务连接的指示信令,指示信令中携带表明 业务连接的首节点为源节点、末节点为目的节点的信息,及业务连接所通过的 电中继节点的信息,指示电中继节点选择与源节点和目的节点支持的信号类型 信息一致的电中继单元。
其中所说的信号类型信息, 包括支持的速率信息和封装信息等。
另外, 电中继单元的信息还包括下述至少一种信息: 电中继单元支持的波 长或波长范围的信息、 电中继单元支持的编码信息、 电中继单元支持的调制模 式信息;触发建立的业务连接所通过的电中继单元符合业务连接的下述至少一 项要求: 与源节点和目的节点支持的波长或波长范围一致、与源节点和目的节 点支持的编码一致、与源节点和目的节点支持的调制模式一致。这里所说的一 致, 例如是信息缺省一致, 也可以是经过配置修改为一致, 例如对于电中继单 元支持的编码信息,可以是电中继单元原本缺省支持源节点和目的节点所支持 的前向纠错 ( FEC, Forward Error Correction )编码, 也可以是通过修改 FEC 使能配置使电中继单元支持 FEC编码。
从实施例一内容可以看出,本发明实施例是获取有电中继单元的信息, 所 述电中继单元的信息至少包括电中继单元的节点标识信息及电中继单元支持 的信号类型信息, 而触发建立的是首节点为源节点、末节点为目的节点并通过 其它节点中的至少一个电中继单元的一个路由的端到端的业务连接,其中所述 通过的电中继单元支持的信号类型信息与所述源节点和目的节点支持的信号 类型信息一致。 因为建立的业务连接不是以电中继单元为首节点或末节点, 而 是跨越该电中继单元, 因此当电中继单元发生故障时,可以绕过该电中继单元 进行重路由, 也就能够形成新的业务连接, 从而避免业务中断, 也就提高了建 立业务连接的可靠性。 另外, 针对一个业务只建立一个业务连接, 相对于现有 技术需建立两个业务连接, 维护也更简单。
图 2是本发明实施例二的业务连接建立方法流程图。实施例二相对于实施 例一, 更详细介绍本发明实施例技术方案。
图 2主要包括步骤:
步骤 201、 获取业务的源节点和目的节点的相关信息及网络相关信息; 本发明实施例中, 涉及到网络中的一个实体, 该实体称为路径计算单元。 路径计算单元一般负责根据节点及网络的相关信息进行路由选择和波长 分配等操作。路径计算单元可以是网络中独立存在的一个实体,也可以是设置 在网络中的相关节点上, 例如设置在源节点上。
该步骤中, 当路径计算单元接收到业务请求消息时,根据业务请求消息可 以获知这个业务的源节点和目的节点。 另外, ^居现有的网络中的节点利用内 部路由协议(IGP, Interior Gateway Protocol )等协议广播的信息, 路径计算单 元在接收到业务请求消息之前已经获取网络拓朴信息、网络中各节点的端口交 叉能力信息、 节点间链路的波长信息, 以及节点和链路的物理损伤信息等(例 如光功率、 色散等信息)。 上述获取的信息可以用于为该业务进行路由选择和 波长分配等。
步骤 202、 获取电中继单元的相关信息;
本发明实施例中, 需要建立通过电中继单元的业务连接, 因此路径计算单 元需要计算出经过某个电中继单元的路径。
在网络中可能存在多个具有电中继单元的节点,这些节点中的每个节点也 可能包括多个电中继单元。本发明实施例中,各个电中继节点将自身的信息进 行发布,例如可以通过扩展现有的 IGP协议例如扩展开放式最短路径优先协议 ( OSPF, Open Shortest Path First Protocol )、 中间系统到中间系统( IS-IS, Intermediate System to Intermediate System )协议等, 在网络中广播电中继单元 的信息。 另外还可以通过路径计算协议(PCECP, Path Computation Element Communication Protocol )发送给路径计算单元。 所述扩展可以是利用上述协 议中的保留字段或增加新的字段携带电中继单元的信息。例如, 所述扩展可以 通过扩展相关协议的消息进行, 例如扩展 OSPF 协议的链路状态广播数据 ( LSA, link-state advertisements ) 消息中的节点属性 TLV (类型 ( Type )、 长 度( Length )、 值(Value ) )对象中的子 TLV或者链路 TLV对象中的子 TLV 来携带电中继单元的信息。
路径计算单元通过扩展后的 IGP等协议发布的信息,获取电中继单元的信 息。
电中继单元的信息至少包括电中继单元的位置信息和电中继单元支持的 信号类型信息。电中继单元的位置信息包括在网络中的哪个节点具有电中继单 元和该节点具有哪些电中继单元。 电中继单元所能支持的信号类型信息, 包括 可以支持的速率信息和封装信息等, 具体可以如下表示: ODU0 ( Optical Channel Data Unit, 光通道数据单元) /OTU0 ( Optical channel Transport Unit, 光信道传送单元), ODU1/OTU1 , ODU2/OTU2, ODU3/OTU3 , OCh ( Optical Channel, 光信道) at 2.5 Gbps, OCh at 10 Gbps, OCh at 40 Gbps等。 其中 ODU1/OTU1表示可承载 HO-ODU1/OTU1 的业务速率, 支持 OTN的封装; OCh at 2.5 Gbps表示可承载 2.5G的业务速率, 不支持 OTN的封装; 其它形式 的含义参照上述描述。
进一步的,电中继单元的信息还可以包括:支持的波长或波长范围的信息、 是否支持波长转换、在支持波长转换时所支持的波长转换的范围、 支持的编码 信息(例如前向纠错(FEC, Forward Error Correction )编码类型信息)、 支持 的调制模式信息(例如归零码 ( RZ, Return Zero )模式、 非归零码 ( NRZ, Non Return Zero )模式)等。 这些信息也可以同时进行发布, 则路径计算单元 可以获取到这些信息。
需要说明的是, 上述步骤 201和 202没有必然的顺序关系。
步骤 203、 进行路由选择和波长分配;
路径计算单元获取相关信息例如步骤 201和 202中获取的信息后,进行路 由选择和波长分配操作。 需要说明的是,如果路径计算单元不建立通过电中继 单元的业务连接,可以直接根据步骤 201中获取的相关信息进行路由选择和波 长分配,若通过相关计算能找到合适的路由和波长, 则可以触发控制平面信令 建立从源节点到目的节点的业务连接。
本发明实施例中需要建立通过电中继单元的业务连接,因此路径计算单元 需要同时参考步骤 202中获取的电中继单元的相关信息。
路径计算单元在网络中处于源节点和目的节点之间的节点中,查找具有电 中继单元的电中继节点,进一步比较查找到的电中继节点中具有的电中继单元 支持的信号类型, 与源节点和目的节点支持的信号类型是否匹配, 若存在匹配 一致的情况, 则同时结合网络的其它信息, 例如网络拓朴信息、 该电中继节点 与外部链路的连接关系信息等进行计算,从而计算出从源节点到目的节点并通 过电中继节点中的至少一个电中继单元的路由, 并为该路由分配合适的波长。
需要说明的是,进行上述匹配时,还可以进一步根据电中继单元的其它信 息对电中继单元与源节点和目的节点进行匹配,所述其它信息包括下述至少一 种信息: 支持的波长或波长范围的信息、在支持波长转换时所支持的波长转换 的范围、 支持的编码信息(例如 FEC编码类型信息) 以及支持的调制模式信 息等。
还需要说明的是,该实施例是以路径计算单元确定从源节点到目的节点并 通过电中继节点的某个电中继单元的路由为例,也可以是网络侧其它设备确定 好路由后通知路径计算单元。
步骤 204、 触发建立通过电中继单元的业务连接。
路径计算单元完成路由选择和波长分配之后, 向源节点发出建路信令信 息, 要求建立端到端的业务连接。
建路信令消息中携带已经确定的路由的相关信息(包括源节点、 电中继节 点、 目的节点以及经过的其它节点的信息), 要求根据路由建立端到端的业务 连接。
进一步的,还可以在建路信令消息中携带一个属性标识进一步明确指示该 业务连接是跨越电中继单元的业务连接,方便各节点迅速识别出需建立的业务 连接的类型。 该属性标识可以通过在建路信令消息中增加一个标识位实现。
建路信令消息可以有两种形式,一种是直接在路由信息中指明所经过的电 中继节点中的电中继单元,该电中继单元在步骤 203中已经被选取出。 另一种 是不直接指明所经过的电中继节点中的电中继单元,只指明所经过的电中继节 点,后续由该电中继节点选取其所具有的符合条件的一个电中继单元,该条件 是电中继单元支持的信号类型与源节点和目的节点支持的信号类型一致,进一 步的还可以是下述至少一项要求:与所述源节点和所述目的节点支持的波长或 波长范围一致、与所述源节点和所述目的节点支持的编码一致、与所述源节点 和所述目的节点支持的调制模式一致。这里所说的一致,例如是信息缺省一致, 也可以是经过配置修改为一致,例如对于电中继单元支持的编码信息,可以是 电中继单元原本缺省支持源节点和目的节点所支持的前向纠错(FEC, Forward Error Correction )编码, 也可以是通过修改 FEC使能配置使电中继单元支持 FEC编码。
对于接收到建路信令消息的源节点,根据建立信令消息的指示进行业务连 接的建立, 包括进行资源预留和交叉连接配置等。 源节点将该建立信令消息按 路由向各节点传输, 各节点接收后根据指示进行资源预留和交叉连接的配置, 直到最终与目的节点完成连接。
从实施例二内容可以看出,本发明实施例是获取有电中继单元的信息, 所 述电中继单元的信息至少包括电中继单元的节点标识信息及支持的信号类型 信息, 另外也可以进一步包括下述至少一种信息: 电中继单元支持的波长或波 长范围的信息、电中继单元支持的编码信息、电中继单元支持的调制模式信息。 触发建立的是首节点为源节点、末节点为目的节点并通过其它节点中的至少一 个电中继单元的一个路由的端到端的业务连接,其中所述通过的电中继单元支 持的信号类型信息与所述源节点和目的节点支持的信号类型信息一致。因为建 立的业务连接不是以电中继单元为首节点或末节点, 而是跨越该电中继单元, 因此当电中继单元发生故障时,可以绕过该电中继单元进行重路由,也就能够 形成新的业务连接, 从而避免业务中断, 也就提高了建立业务连接的可靠性。 另外,针对一个业务只建立一个业务连接,相对于现有技术需建立两个业务连 接, 维护也更简单。
另夕卜,在触发建立业务连接时,可以是直接在建路信令消息中的路由信息 中指明所经过的电中继节点中的电中继单元,还可以是不直接指明所经过的电 中继节点中的电中继单元, 只指明所经过的电中继节点,后续由该电中继节点 选取其所具有的符合条件的一个电中继单元, 因此应用更为灵活。 以下结合一个具体应用进行详细说明。
该具体应用以假设业务请求为从源节点 A到目的节点 Z之间建立一条 10G速率的业务连接为例。 参见图 3, 是本发明实施例三的应用场景示意图。
图 3中包括一个 WDM网络, 其中给出源节点 A ( Node A )、 电中继节点 C ( Node C )和目的节点 Z ( Node Z )。 箭头与箭头中间的虚线表示中间还可 以包括多个节点(该多个节点在图中未画出)。 电中继节点 C是一个具备电中 继功能的节点,其中包括多个电中继单元。用户需要在源节点 A和目的节点 Z 之间建立一条业务连接。
图 4是本发明实施例三的业务连接建立方法流程图, 主要包括步骤: 步骤 401、 获取与建立业务连接关联的相关信息;
在路径计算单元接收到业务请求之前,路径计算单元根据现有的 OSPF协 议, 已经获取网络拓朴信息、 网络中各节点的端口交叉能力信息、 节点间链路 的波长信息, 以及节点和链路的物理损伤信息等(例如光功率、 色散等信息)。
同时电中继节点 C也通过 OSPF协议将自身的信息进行发布,路径计算单 元因此也可以获取到电中继节点 C 的信息。 同时网络中 (图中未画出) 的其 它电中继节点也通过 OSPF协议等将自身的信息进行发布,路径计算单元也可 以同时获取到这些信息。
电中继节点 C信息包括但不限于以下形式展现:
": REGInfo::=
<REGl><Lambdal><ODU0/OTU0><FEC><NRZ>
<REG2><Lambda2><ODU2/OTU2><FEC><NRZ>
<REG3><Lambda3><ODUl/OTUl><FEC><NRZ>
<REG4><Lambda4><ODU3/OTU3><FEC><NRZ>"
上述信息,表示本节点包括 4个电中继单元 REG1、 REG2、 REG3和 REG4; 分别支持的信号类型为 ODU0/OTU0、 ODU2/OTU2、 ODU1/OTU1 和 ODU3/OTU3; 分别支持的波长为 Lambdal、 Lambda2、 Lambda3和 Lambda4; 四个电中继单元均支持标准 FEC编码类型,均支持不归零码( NRZ, Non Return Zero )调制模式。
步骤 402、 进行路由选择和波长分配;
路径计算单元接收到为从源节点 A到目的节点 Z之间建立一条 10G速率 的业务连接的业务请求消息后,根据获取的相关信息进行路由选择和波长分配 操作。
路径计算单元在网络中处于源节点和目的节点之间的节点中,查找具有电 中继功能的电中继节点。 根据之前获取的信息, 查找到电中继节点 Node C的 电中继单元 REG2与 Node A和 Node Z都支持相同的信号类型 ODU2/OTU2, 另外还进一步具有: 都支持相同的波长 Lambda2、都支持相同的速率( 10G速 率)、 都支持相同的编码类型和都支持相同的调制模式, 同时结合其它信息例 如网络拓朴信息、 Node C的 REG2与外部链路的连接关系信息等, 路径计算 单元为该业务请求计算出一个路由为: Node A, ..., Node C, ..., Node Z; 其中在 Node C经过其中至少一个电中继单元 REG2。 并且, 路径计算单元为 该路由分配波长 Lambda2。
步骤 403、 触发建立通过电中继单元的业务连接。
路径计算单元完成路由选择和波长分配之后, 向 Node A发出建路信令信 息, 要求建立业务连接。
建路信令消息中携带已经确定的路由的相关信息 (包括路由为 Node
A, ..., Node C ( REG2 ) Node Z, 波长为 Lambda2 )。 该建路信令消息 是直接在路由信息中指明所经过的电中继节点中的电中继单元,另外也可以不 直接指明所经过的电中继节点 Node C中的电中继单元 REG2, 只指明所经过 的电中继节点 Node C, 后续由该电中继节点 Node C选取其所具有的符合条 件的一个电中继单元,该条件是电中继单元支持的信号类型与 Node A和 Node Z支持的信号类型一致, 进一步的还可以包括下述至少一种情形: 都支持的波 长或波长转换范围一致、 都支持的 FEC编码类型一致、 都支持的调制模式一 致。 这里所说的一致, 例如是信息缺省一致, 也可以是经过配置修改为一致, 例如对于电中继单元支持的编码信息,可以是电中继单元原本缺省支持源节点 和目的节点所支持的前向纠错( FEC, Forward Error Correction )编码, 也可以 是通过修改 FEC使能配置使电中继单元支持 FEC编码。
进一步的,还可以在建路信令消息中携带一个属性标识进一步明确指示该 业务连接是跨越电中继单元的业务连接,方便各节点迅速识别出需建立的业务 连接的类型。 该属性标识可以通过在建路信令消息中增加一个标识位实现。
对于接收到建路信令消息的 Node A, 根据建立信令消息的指示进行业务 连接的建立, 包括进行资源预留和交叉连接配置等。 Node A将该建立信令消 息按路由向各节点传输,各节点接收后根据指示进行业务连接的建立, 直到最 终与 Node Z完成连接。
实施例三与实施例二具有基本相同的效果, 此处不再赘述。
上述内容伴细介绍了本发明实施例的业务连接建立方法,相应的,本发明 实施例相应提供一种路径计算单元设备及网络系统。
图 5是本发明实施例的路径计算单元设备结构示意图。
该路径计算单元设备可以是网络中独立存在的一个实体,也可以是设置在 网络中的相关节点上。
如图 5所示, 路径计算单元设备包括: 信息获取单元 51、 路由获取单元
52和触发单元 53。
信息获取单元 51, 用于获取业务的源节点和目的节点的信息, 所述源节 点和目的节点的信息中包括源节点和目的节点各自支持的信号类型信息;获取 除源节点和目的节点外的其它节点中的电中继单元的信息,所述电中继单元的 信息至少包括电中继单元的节点标识信息及电中继单元支持的信号类型信息。
其中,获取的电中继单元的信息可以是由所述其它节点中含有电中继单元 的节点发布; 所述发布采用开放式最短路径优先 OSPF协议, 或者中间系统到 中间系统 IS-IS协议, 或者路径计算 PCECP协议。
路由获取单元 52, 用于获取首节点为源节点、 末节点为目的节点、 并通 过所述其它节点中的至少一个电中继单元的一个路由。
触发单元 53, 用于触发建立所述路由的一个端到端的业务连接, 其中业 务连接通过的电中继单元支持的信号类型信息与源节点和目的节点支持的信 号类型信息一致。
其中所说的信号类型信息, 包括支持的速率信息和封装信息等。
因为本发明实施例中由路径计算单元设备触发建立的业务连接不是以电 中继单元为首节点或末节点, 而是跨越该电中继单元, 因此当电中继单元发生 故障时, 可以绕过该电中继单元进行重路由, 也就能够形成新的业务连接, 从 而避免业务中断, 也就提高了建立业务连接的可靠性。 另外, 针对一个业务只 建立一个业务连接, 相对于现有技术需建立两个业务连接, 维护也更简单。
所述触发单元 53包括: 生成单元 531和发送单元 532。 生成单元 531, 用于生成建立所述路由的端到端的业务连接的指示信令, 所述指示信令中携带表明所述业务连接的首节点为源节点、末节点为目的节点 的信息,及所述业务连接所通过的与所述源节点和目的节点支持的信号类型信 息一致的电中继单元的信息;
发送单元 532, 用于发送所述生成的指示信令。 或者是,
生成单元 531, 用于生成建立所述路由的端到端的业务连接的指示信令, 所述指示信令中携带表明所述业务连接的首节点为源节点、末节点为目的节点 的信息,及所述业务连接所通过的电中继节点的信息,指示所述电中继节点选 择与所述源节点和目的节点支持的信号类型信息一致的电中继单元;
发送单元 532, 用于发送所述生成的指示信令。
路由获取单元 52还包括: 判断单元 521、 确定单元 522。
判断单元 521, 用于判断所述电中继单元支持的信号类型信息与所述源节 点和目的节点支持的信号类型信息是否一致;
确定单元 522, 用于在所述判断单元 521的判断结果为一致时, 确定首节 点为源节点、末节点为目的节点、并通过与所述源节点和所述目的节点支持的 信号类型信息一致的至少一个电中继单元的一个路由。
所述信息获取单元 51包括: 第一获取单元 511和第二获取单元 512。 第一获取单元 511, 用于获取业务的源节点和目的节点的信息, 所述源节 点和目的节点的信息中包括源节点和目的节点各自支持的信号类型信息;
第二获取单元 512, 用于获取除源节点和目的节点外的其它节点中的电中 继单元的信息,所述电中继单元的信息包括电中继单元的节点标识信息及电中 继单元支持的信号类型信息,还包括下述至少一种信息: 电中继单元支持的波 长或波长范围的信息、 电中继单元支持的编码信息、 电中继单元支持的调制模 式信息;
所述触发单元 53触发建立的业务连接所通过的电中继单元符合所述业务 连接的下述至少一项要求:与所述源节点和所述目的节点支持的波长或波长范 围一致、与所述源节点和所述目的节点支持的编码一致、与所述源节点和所述 目的节点支持的调制模式一致。 这里所说的一致, 例如是信息缺省一致, 也可 以是经过配置修改为一致,例如对于电中继单元支持的编码信息, 可以是电中 继单元原本缺省支持源节点和目的节点所支持的前向纠错( FEC, Forward Error Correction )编码, 也可以是通过修改 FEC使能配置使电中继单元支持 FEC编 码。
图 6是本发明实施例的网络系统结构示意图。
如图 6所示, 网络系统包括: 路径计算单元设备 61和节点设备 62。
路径计算单元设备 61, 用于获取业务的源节点和目的节点的信息, 所述 源节点和目的节点的信息中包括源节点和目的节点各自支持的信号类型信息; 获取除源节点和目的节点外的其它节点中的电中继单元的信息,所述电中继单 元的信息至少包括电中继单元的节点标识信息及电中继单元支持的信号类型 信息; 获取首节点为所述源节点、末节点为所述目的节点并通过所述其它节点 中的至少一个电中继单元的一个路由;触发建立所述路由的一个端到端的业务 连接,其中所述业务连接通过的电中继单元支持的信号类型信息与所述源节点 和所述目的节点支持的信号类型信息一致;
节点设备 62, 用于根据所述路径计算单元设备 61的触发, 建立通过所述 其它节点中的至少一个电中继单元并到达所述目的节点的一个路由的端到端 的业务连接。
上述所说的节点设备 62, 可以是源节点设备, 或其它节点设备。
其中路径计算单元设备 61具有上述图 5所示的结构, 具体参见前面的描 述, 此处不再赘述。
上述设备和系统内的各模块之间的信息交互、执行过程等内容, 由于与本 发明方法实施例基于同一构思, 具体内容可参见本发明方法实施例中的叙述, 此处不再赘述。
综上所述,本发明实施例是获取有电中继单元的信息, 所述电中继单元的 信息至少包括电中继单元的节点标识信息及电中继单元支持的信号类型信息, 而触发建立的是首节点为源节点、末节点为目的节点并通过其它节点中的至少 一个电中继单元的一个路由的端到端的业务连接,其中所述通过的电中继单元 支持的信号类型信息与所述源节点和目的节点支持的信号类型信息一致。因为 建立的业务连接不是以电中继单元为首节点或末节点, 而是跨越该电中继单 元, 因此当电中继单元发生故障时, 可以绕过该电中继单元进行重路由, 也就 能够形成新的业务连接,从而避免业务中断,也就提高了建立业务连接的可靠 性。 另外, 针对一个业务只建立一个业务连接, 相对于现有技术需建立两个业 务连接, 维护也更简单。
本领域普通技术人员可以理解上述实施例的各种方法中的全部或部分步 骤是可以通过程序来指令相关的硬件来完成,该程序可以存储于一计算机可读 存储介质中, 存储介质可以包括: 只读存储器(ROM, Read Only Memory )、 随才 取存储器(RAM, Random Access Memory )、 磁盘或光盘等。
以上对本发明实施例所提供的一种业务连接建立方法、路径计算单元设备 及网络系统进行了详细介绍,本文中应用了具体个例对本发明的原理及实施方 式进行了阐述,以上实施例的说明只是用于帮助理解本发明的技术方案;同时, 对于本领域的一般技术人员,依据本发明的技术方案,在具体实施方式及应用 范围上均会有改变之处,综上所述,本说明书内容不应理解为对本发明的限制。

Claims

权 利 要 求
1、 一种业务连接建立方法, 其特征在于, 包括:
获取业务的源节点和目的节点的信息,所述源节点和目的节点的信息中包 括所述源节点和所述目的节点各自支持的信号类型信息;
获取除所述源节点和所述目的节点外的其它节点中的电中继单元的信息, 所述电中继单元的信息至少包括电中继单元的节点标识信息及电中继单元支 持的信号类型信息;
获取首节点为所述源节点、末节点为所述目的节点、并通过所述其它节点 中的至少一个电中继单元的一个路由;
触发建立所述路由的一个端到端的业务连接,其中所述业务连接通过的电 中继单元支持的信号类型信息与所述源节点和所述目的节点支持的信号类型 信息一致。
2、 根据权利要求 1所述的业务连接建立方法, 其特征在于:
所述触发建立所述路由的一个端到端的业务连接,其中所述业务连接通过 的电中继单元支持的信号类型信息与所述源节点和所述目的节点支持的信号 类型信息一致包括:
发送建立所述路由的端到端的业务连接的指示信令,所述指示信令中携带 表明所述业务连接的首节点为所述源节点、末节点为所述目的节点的信息,及 所述业务连接所通过的与所述源节点和所述目的节点支持的信号类型信息一 致的电中继单元的信息。
3、 根据权利要求 1所述的业务连接建立方法, 其特征在于:
所述触发建立所述路由的一个端到端的业务连接,其中所述业务连接通过 的电中继单元支持的信号类型信息与所述源节点和所述目的节点支持的信号 类型信息一致包括:
发送建立所述路由的端到端的业务连接的指示信令,所述指示信令中携带 表明所述业务连接的首节点为所述源节点、末节点为所述目的节点的信息,及 所述业务连接所通过的电中继节点的信息,指示所述电中继节点选择与所述源 节点和所述目的节点支持的信号类型信息一致的电中继单元。
4、 根据权利要求 1至 3任一项所述的业务连接建立方法, 其特征在于: 所述获取首节点为所述源节点、末节点为所述目的节点、并通过所述其它 节点中的至少一个电中继单元的一个路由包括:
判断所述其它节点中的电中继单元支持的信号类型信息与所述源节点和 所述目的节点支持的信号类型信息是否一致,若一致, 则确定首节点为所述源 节点、末节点为所述目的节点、并通过与所述源节点和所述目的节点支持的信 号类型信息一致的一个电中继单元的一个路由。
5、 根据权利要求 1至 3任一项所述的业务连接建立方法, 其特征在于: 所述电中继单元的信息还包括下述至少一种信息:电中继单元支持的波长 或波长范围的信息、 电中继单元支持的编码信息、 电中继单元支持的调制模式 信息;
所述触发建立的业务连接所通过的电中继单元符合所述业务连接的下述 至少一项要求: 与所述源节点和所述目的节点支持的波长或波长范围一致、与 所述源节点和所述目的节点支持的编码一致、与所述源节点和所述目的节点支 持的调制模式一致。
6、 根据权利要求 1至 3任一项所述的业务连接建立方法, 其特征在于: 获取的除所述源节点和所述目的节点外的其它节点中的电中继单元的信 息具体由所述其它节点中含有电中继单元的节点发布;
所述发布采用开放式最短路径优先 OSPF协议,或者中间系统到中间系统 IS-IS协议, 或者路径计算 PCECP协议。
7、 一种路径计算单元设备, 其特征在于, 包括:
信息获取单元, 用于获取业务的源节点和目的节点的信息, 所述源节点和 目的节点的信息中包括所述源节点和所述目的节点各自支持的信号类型信息; 获取除所述源节点和所述目的节点外的其它节点中的电中继单元的信息,所述 电中继单元的信息至少包括电中继单元的节点标识信息及电中继单元支持的 信号类型信息;
路由获取单元, 用于获取首节点为所述源节点、 末节点为所述目的节点、 并通过所述其它节点中的至少一个电中继单元的一个路由;
触发单元, 用于触发建立所述路由的一个端到端的业务连接,其中所述业 务连接通过的电中继单元支持的信号类型信息与所述源节点和所述目的节点 支持的信号类型信息一致。
8、 根据权利要求 7所述的路径计算单元设备, 其特征在于, 所述触发单 元包括:
生成单元, 用于生成建立所述路由的端到端的业务连接的指示信令, 所述 指示信令中携带表明所述业务连接的首节点为所述源节点、末节点为所述目的 节点的信息,及所述业务连接所通过的与所述源节点和所述目的节点支持的信 号类型信息一致的电中继单元的信息;
发送单元, 用于发送所述生成的指示信令。
9、 根据权利要求 7所述的路径计算单元设备, 其特征在于, 所述触发单 元包括:
生成单元, 用于生成建立所述路由的端到端的业务连接的指示信令, 所述 指示信令中携带表明所述业务连接的首节点为所述源节点、末节点为所述目的 节点的信息,及所述业务连接所通过的电中继节点的信息,指示所述电中继节 点选择与所述源节点和所述目的节点支持的信号类型信息一致的电中继单元; 发送单元, 用于发送所述生成的指示信令。
10、 根据权利要求 7至 9任一项所述的路径计算单元设备, 其特征在于, 所述路由获取单元包括:
判断单元,用于判断所述电中继单元支持的信号类型信息与所述源节点和 所述目的节点支持的信号类型信息是否一致;
确定单元, 用于在所述判断单元的判断结果为一致时,确定首节点为所述 源节点、末节点为所述目的节点、并通过与所述源节点和所述目的节点支持的 信号类型信息一致的一个电中继单元的一个路由。
11、 根据权利要求 7至 9任一项所述的路径计算单元设备, 其特征在于, 所述信息获取单元包括:
第一获取单元, 用于获取业务的源节点和目的节点的信息, 所述源节点和 所述目的节点的信息中包括所述源节点和所述目的节点各自支持的信号类型 信息;
第二获取单元,用于获取除所述源节点和所述目的节点外的其它节点中的 电中继单元的信息,所述电中继单元的信息包括电中继单元的节点标识信息及 电中继单元支持的信号类型信息,还包括下述至少一种信息: 电中继单元支持 的波长或波长范围的信息、 电中继单元支持的编码信息、 电中继单元支持的调 制模式信息; 所述触发单元触发建立的业务连接所通过的电中继单元符合所述业务连 接的下述至少一项要求:与所述源节点和所述目的节点支持的波长或波长范围 一致、与所述源节点和所述目的节点支持的编码一致、与所述源节点和所述目 的节点支持的调制模式一致。
12、 一种网络系统, 其特征在于, 包括:
路径计算单元设备, 用于获取业务的源节点和目的节点的信息, 所述源节 点和目的节点的信息中包括所述源节点和所述目的节点各自支持的信号类型 信息; 获取除所述源节点和所述目的节点外的其它节点中的电中继单元的信 息,所述电中继单元的信息至少包括电中继单元的节点标识信息及电中继单元 支持的信号类型信息; 获取首节点为所述源节点、末节点为所述目的节点并通 过所述其它节点中的至少一个电中继单元的一个路由;触发建立所述路由的一 个端到端的业务连接,其中所述业务连接通过的电中继单元支持的信号类型信 息与所述源节点和所述目的节点支持的信号类型信息一致;
节点设备, 用于根据所述路径计算单元设备的触发, 建立通过所述其它节 点中的一个电中继单元并到达所述目的节点的一个路由的端到端的业务连接。
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1431834A (zh) * 2003-01-16 2003-07-23 上海交通大学 多粒度混合光网络的自动交换控制方法
CN1564544A (zh) * 2004-03-26 2005-01-12 清华大学 无线自组织网络中基于节点的度的路由搜寻和维护方法
US20050185958A1 (en) * 2004-01-26 2005-08-25 Hitachi Communication Technologies, Inc. Optical cross connect apparatus and network
US20080288657A1 (en) * 2006-01-30 2008-11-20 Brother Kogyo Kabushiki Kaisha Information delivery system, reregistration message sending method, node device, and recording medium recording node processing program

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1431834A (zh) * 2003-01-16 2003-07-23 上海交通大学 多粒度混合光网络的自动交换控制方法
US20050185958A1 (en) * 2004-01-26 2005-08-25 Hitachi Communication Technologies, Inc. Optical cross connect apparatus and network
CN1564544A (zh) * 2004-03-26 2005-01-12 清华大学 无线自组织网络中基于节点的度的路由搜寻和维护方法
US20080288657A1 (en) * 2006-01-30 2008-11-20 Brother Kogyo Kabushiki Kaisha Information delivery system, reregistration message sending method, node device, and recording medium recording node processing program

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