JP6446494B2 - Edge node device, resource control method, and program - Google Patents

Description

  The present invention relates to a technology for providing a service by setting a path in a communication network, and particularly, related to a preemption technology that uses resources of an existing path when resources are insufficient for path setting. It is.

  There are MPLS, GMPLS, and the like as existing technologies for providing a service by setting a path in a communication network. These path setting functions are realized using, for example, RSVP-TE which is a signaling protocol.

  In a signaling technique such as RSVP-TE, a numerical value related to the priority of a path is assigned to each path, and a preemption function is provided in which a path with a higher priority takes away resources of a path with a lower priority.

  In the RSVP-TE specification, two values of holding priority and setup priority are provided as path setting priority information. If the setup priority of a newly set path is higher than the holding priority of the already set path, resource preemption occurs, the path that was originally set is deleted, and a path with a high setup priority is generated Is done.

  FIG. 1 illustrates an example of setting a new path by performing preemption of the resource of the path that has already been set. FIG. 1 shows a network composed of six nodes 1 to 6. In this network, it is assumed that the bandwidth available for all links is 1. It is assumed that the path 1 is already set in the band 1 in the route of the node 4-> node 5-> node 2-> node 3. Further, it is assumed that the priority of the path 1 is 3. Note that the priority is higher as the numerical value is smaller (the degree of priority is higher).

  At this time, as shown by a dotted line in FIG. 1, a request for setting path 2 having a priority of 2 and a bandwidth of 1 is generated, and a path setting message is transmitted from node 1 to nodes 2 and 3 And Here, since there is no path already set in the section 1-> 2, the bandwidth can be secured. The bandwidth of the section of 2-> 3 is all used by the path 1, but the priority of the path 2 is higher than the priority of the path 1 that has already been set. 1 is deleted from the path 1, the band 1 is assigned to the path 2, and the path 2 is set. In this way, path 2 of 1-> 2-> 3 is set.

WO2008 / 044646

  However, in the prior art, the resource for which priority is set is the link of each link from the Ingress node (example: node 1 for path 2 in FIG. 1) to the egress node (example: node 3 for path 2 in FIG. 1). Only the bandwidth. The priority setting for UNI ports and UNI resources of Egress nodes is not covered by the standard, and is dependent on the implementation of Egress. The same applies to UNI ports and UNI resources of Ingress.

As described above, communication between end-to-end (UNI end point ports) cannot be completely ensured only by priority control of an existing control session. In other words, priority control including the UNI port could not be performed.
The present invention has been made in view of the above points, and an object of the present invention is to provide a technology that enables resource control based on priority at an end-to-end including UNI ports at both ends.

In order to solve the above problems, the present invention is an edge node device in a communication network that provides a communication service by setting a path,
An interface for connecting to a user device;
A resource for setting the path by referring to resource information storage means for storing resource information including the interface as a resource when there is a path setting request for setting a path having the interface as a start point or an end point. Determination means for determining whether or not there is,
When it is determined by the determination means that an interface for setting the path is insufficient, the path is already set based on the priority of the path and the priority of the path that has already been set. an interface against it are paths are used, and a control unit that performs control to use as an interface path according to the path setting request,
It is comprised as an edge node apparatus characterized by providing.

  The edge node device includes signaling control means for performing signaling in a control plane with a counter edge node device via a relay network in the communication network, wherein the signaling control means is configured to prioritize a path related to the path setting request. The degree may be included in the control message for signaling.

  Further, for example, the signaling control means may control the path between the interface and the interface of the opposite edge node device by performing signaling using an IP address associated with the interface. Good. In this configuration, when the priority of the path related to the path setting request and the priority of the already set path are the same, the IP associated with the interface of the end point of the path related to the path setting request It is possible to determine whether the priority is high or low by comparing the address and the IP address associated with the interface at the end point of the already set path.

  The resource to be determined by the determining unit includes, for example, the processing capability of the edge node device, access line resource, and usable interface. The interface is a non-IP interface that does not perform IP routing by looking up an IP address in an IP packet header, for example.

  The present invention may also be configured as a program for causing a resource control method executed by the edge node device and a communication device including a computer function to function as each means in the edge node device.

  According to the present invention, when a service is provided by setting a path in a communication network, resource control based on priority can be performed end-to-end including UNI ports at both ends.

It is a figure for demonstrating the preemption of the resource in path | pass setting. It is a figure for demonstrating the outline | summary in embodiment of this invention. It is a figure for demonstrating the operation example in embodiment of this invention. It is a figure for demonstrating the operation example in embodiment of this invention. It is a system configuration diagram in an embodiment. It is a block diagram of each edge apparatus in an Example. It is a figure which shows the example of the information stored in the UNI address storage part in an Example. It is a figure for demonstrating operation | movement of the system in an Example.

  Embodiments of the present invention will be described below with reference to the drawings. The embodiment described below is only an example, and the embodiment to which the present invention is applied is not limited to the following embodiment.

(Outline of embodiment, operation example)
First, an outline and an operation example of the present embodiment will be described. FIG. 2 is an overall system configuration diagram for explaining the outline of the present embodiment. As shown in FIG. 2, the system according to the present embodiment has a configuration in which edge devices 10 and 20 are connected to a relay network 30. User devices are connected to the outside of each edge device (the side other than the relay network side), and each edge device transmits and receives data to and from the user device. In the example of FIG. 2, for convenience of explanation, it is assumed that the edge device 10 is a transmission side and the edge device 20 is a reception side.

  In the example of FIG. 2, the edge device 10 has three interfaces (input UNI ports) for receiving data from the user device, and the edge device 20 is called an interface (output UNI port) for sending data to the user device. ).

  In the present embodiment, each link from the output interface on the relay network side of the edge device 10 to the input interface on the relay network side of the edge device 200 is based on, for example, the resource preemption function defined in RSVT-TE. Then, the resource preemption operation is performed as necessary. In the present embodiment, for example, the priority value included in the path setting request at the time of path setting by the path setting request is the priority value (eg, holding priority) in the path setting control message (signaling message) on the relay network side. , Setup priority).

  On the other hand, a resource preemption operation is performed on the UNI port and UNI resource of each edge device as described below. An example of the operation will be described with reference to FIGS.

<Operation example 1>
As shown in FIG. 3, band 1 path 1 is already set between input UNI port A and output UNI port D, and band 3 path 2 is set between input UNI port B and output UNI port E. It is assumed that Assume that the priority of path 1 is 3, and the priority of path 2 is 2. In the edge device 10, for example, due to the processing capacity of the CPU and memory, the total of the maximum path bandwidth that can be accommodated is 5, and the total of the maximum path bandwidth that can also be accommodated in the edge device 20 is 5. It shall be.

  Here, it is assumed that a request for setting the path 3 (band 2 and priority 1) from the input port C to the output port F is made to the edge device 10.

  The edge device 10 that has received the setting request for the path 3 determines that the path 1 and the path 2 have already consumed resources corresponding to the band 5 and the path 3 cannot be added and set. Therefore, the priority 1 of the path 3 is compared with the priority 2 of the path 2 and the priority 3 of the path 1, and it is determined that the resource of the path 1 having the lowest priority is deprived and the path 3 is set. The band 2 is stopped from being used (for example, the process of deleting the path 1 is performed to release the band 2), and the resource corresponding to the band 2 is freed for the path 3.

  The edge device 10 then sends a control message (including information indicating that the priority is 1) for setting a path 3 (a path having the input UNI port C as the start point and the output UNI port F as the end point). By sending to the device 20 side, the path 3 is set. Also in the edge device 20 that has received the control message, it is determined that the resources corresponding to the bandwidth 5 have already been consumed in the path 1 and the path 2, and the path 3 cannot be additionally set. Then, the priority 1 of the path 3 is compared with the priority 2 of the path 2 and the priority 3 of the path 1, and it is determined that the resource of the path 1 having the lowest priority is deprived and the path 3 is set. 1 is stopped, the resource corresponding to the band 2 is used for the path 3, and the path set on the relay network side is connected to the output UNI port. The path 3 is set by such processing.

<Operation example 2>
An operation example 2 will be described with reference to FIG. Also in the operation example 2, it is assumed that the same paths 1 and 2 as those in the operation example 1 are already set. In the operation example 2, it is assumed that the processing capability of each edge device is sufficiently large so that it can cope with an additional path. However, in the operation example 2, it is assumed that the bandwidth of the access line between the UNI port and the user apparatus is limited, and there are only resources corresponding to the bandwidth 5 on the upstream side and the downstream side. For example, there is a case where an access line connected to a plurality of UNI ports physically passes through one transmission line and the number of UNI ports (total bandwidth) that can be accommodated is limited.

  Here, it is assumed that a request for setting the path 3 (band 2 and priority 1) from the input port C to the output port F is made to the edge device 10.

  The edge device 10 that has received the setting request for the path 3 has already consumed the resource corresponding to the band 5 in the path 1 and the path 2, and determines that the path 3 cannot be additionally set due to the bandwidth limitation of the access line. . Therefore, the priority 1 of the path 3 is compared with the priority 2 of the path 2 and the priority 3 of the path 1, and it is determined that the resource of the path 1 having the lowest priority is deprived and the path 3 is set. 1 is stopped, and the access line resource corresponding to the band 2 is freed for the path 3.

  The edge device 10 then sends a control message (including information indicating that the priority is 1) for setting a path 3 (a path having the input UNI port C as the start point and the output UNI port F as the end point). By sending to the device 20 side, the path 3 is set. Also in the edge device 20 that has received the control message, it is determined that the resources corresponding to the bandwidth 5 have already been consumed in the path 1 and the path 2, and the path 3 cannot be additionally set. Then, the priority 1 of the path 3 is compared with the priority 2 of the path 2 and the priority 3 of the path 1, and it is determined that the resource of the path 1 having the lowest priority is deprived and the path 3 is set. The use of the resource by 1 is stopped, and the resource of the access line corresponding to the band 2 is used for the path 3, so that the path set on the relay network side is connected to the output UNI port. Also in the operation example 2, the setting of the path 3 is performed by such processing.

  In the above operation examples 1 and 2, the resource as the processing capability of the edge device and the resource of the access line are both examples of resource contention resolution related to the UNI port.

  In the above-described operation examples 1 and 2, attention is paid to the resource as the processing capability of the edge device and the resource of the access line, but the UNI port itself can be regarded as a resource and can be a target of preemption. For example, when the input UNI port C is used for a certain path and there is a request to set another path starting from the input UNI port C, the priority of the path that has already been set When the priority of the newly set path is compared, and the latter is high (the numerical value is small), the use of the former path can be stopped and the input UNI port C can be used for the latter path. Similarly, for the output port F, for example, resource preemption can be performed at the timing when the signaling is received or when the path setting command is received from the external system.

(Example)
Next, specific system configuration examples and operation examples for realizing the above-described operations will be described.

<System configuration example>
FIG. 5 shows an overall system configuration diagram in this embodiment. The system of the present embodiment has a configuration in which the edge devices 100 and 200 are connected to the relay network 300 in the same manner as the configuration shown in FIG. User devices are connected to the outside of each edge device (the side other than the relay network side), and each edge device transmits and receives data to and from the user device. Also in the example of FIG. 5, for convenience of explanation, it is assumed that the edge device 100 is a transmission side and the edge device 200 is a reception side. Each edge device includes both an Ingress function and an Egress function. In FIG. 5 (and FIG. 6 to be described later), the edge device 100 is focused on the Ingress function for easy understanding. The edge device 200 focuses on the function of Egress.

  In this embodiment, the data transmitted and received by the user device is non-IP traffic such as video, Ethernet (registered trademark), ATM, SDH, etc., and an interface (input UNI port) connected to the user device of the edge device 100 The interface (output UNI port) connected to the user device of the edge device 200 is a non-IP interface. More specifically, it is a non-IP interface such as an Ethernet port, video IF (HD-SDH, DVB-ASI), SDH, and ATM that does not perform IP routing by looking up the IP address of the IP packet header. In FIG. 5, each edge device has one UNI port, but this is for convenience of explanation, and there are actually a plurality of UNI ports. In addition, there may be a plurality of receiving-side edge devices, and the path may have a point-to-multi-point topology.

  In this embodiment, an IP address is virtually (logically) assigned to each of the input UNI port and the output UNI port. This IP address is an IP address that upper application software (API upper layer) can use for End-End designation, and is configured in each edge device, for example.

  For example, if the input / output UNI port is a video port (HD-SDI, DVB-ASI, etc.) or Ethernet port, an IP address is assigned to each port, and if DVB-ASI is PID / CC, PID / CC An IP address is assigned to each unit. For Ethernet vlan, an IP address is assigned to each vlan, and for SDH, an IP address is assigned to each time slot. This IP address may be called a UNI address.

  In the relay network 300, a signaling protocol is used for generating / deleting a path for transferring data, changing a multicast topology, and the like. In the present invention, the signaling protocol is not limited to a specific one, but it is assumed in this embodiment that MPLS RSVP-TE (RFC3209, RFC3473, RFC4875) is used. Other protocols (LDP, PIM-SM, PIM-SSM, SIP, etc.) can also be applied. The positioning of the UNI address in this embodiment appears as one of a plurality of loopback IF addresses in the edge device from the viewpoint of the device on the relay network side.

  In a signaling control session in the relay network 300, a UNI address is used as an end point. Conventionally, the loopback IF address of the edge device was used, but in this example, the higher port application can directly map the UNI port (UNI resource) specified by End-End to the relay LSP, and When UNI-End is specified as End-End, path control in the network can be abstracted and hidden.

  That is, as shown in FIG. 5, the edge device 100 uses the UNI address assigned to the input UNI port as the IP address of the source of the signaling session of the control plane, and uses the UNI address assigned to the output UNI port of the control plane. Used as the destination IP address of the signaling session. By performing message transmission and reception based on the signaling protocol between these endpoints, resource preemption control and device settings are also performed, and a path for data transfer between the input UNI port and the output UNI port is established. . Note that this path includes a cross-connect between the input UNI port of the edge device 100 and the signaling line path (LSP) endpoint of the edge device 100, the path (LSP) of the LSP endpoint of the edge device 100 and the LSP endpoint of the edge device 200, and It consists of a path (cross-connect) between the LSP end point of the edge device 200 and the output UNI port of the edge device 200. The path (cross-connect) in each edge device is realized as setting data in the transfer table.

  The UNI address configured on the UNI port (non-IP interface) is only used as a communication endpoint in the control plane, and when IP routing that looks up the IP header is not used for data transfer on the data plane ( In the case of MPLS, for example, a UNI address (IP address) is not required in the header. Of course, it can be transferred as an IP packet by IP multicast with the source as a UNI address. In this case, the protocol for realizing multicast is limited to IP multicast (PIM-SM, PIM-SSM, etc.). When a multicast topology is realized by P2MP-LSP using a UNI address for RSVP-TE signaling, an IP address is not required for data transfer on the data plane. An IP address may exist.

  As described above, the UNI address is an endpoint IP address for communication in the control plane, but IP routing is possible in the core switch, core router, and LSR (Label Switched Router) of the relay network in terms of signaling protocol execution and maintenance. It is supposed to be. In this embodiment, Ping, Traceroute, LSP-Ping, LSP-Traceroute, BFD, etc. can be executed for the UNI address of the non-IP interface, and route advertisement can be made to OSPF and PCE. This greatly increases the operability of the network.

  FIG. 6 is a diagram illustrating an internal functional configuration example of the edge devices 100 and 200 in the system illustrated in FIG.

  As illustrated in FIG. 6, the edge device 100 includes an input UNI port 101, a signaling control unit 102, a data transfer control unit 103, a data transfer information storage unit 104, a UNI address storage unit 105, and a resource control unit 106. The edge device 200 includes an output UNI port 201, a signaling control unit 202, a data transfer control unit 203, a data transfer information storage unit 204, a UNI address storage unit 205, and a resource control unit 206. Hereinafter, the same functional units in the edge devices 100 and 200 will be described together.

  As described above, the input UNI port 101 and the output UNI port 201 are non-IP interfaces connected to the user apparatus.

  The data transfer information storage units 104 and 204 are functional units that store data transfer information in the data plane. The data transfer control unit 103 of the transmission-side edge device 100 refers to the data transfer information storage unit 104 to send the data received from the input UNI port 101 to the path of the relay network, and receives the reception-side edge device 200. The data transfer control unit 203 transfers the data received from the relay network path to the output UNI port 201 by referring to the data transfer information storage unit 204.

  The UNI address storage units 105 and 205 store an IP address assigned to each UNI port. An example of table information stored in the UNI address storage units 105 and 205 is shown in FIG.

  Signaling control units 102 and 202 shown in FIG. 6 are functional units that perform signaling processing and the like in the control plane. In this embodiment, the resource control unit 106 of the transmission-side edge device 100 sets between end points of paths to be set. Upon receiving an instruction (path setting request) specifying a UNI address, bandwidth, priority, etc., the instruction is notified to the signaling control unit 102, and a control message for signaling is generated based on these information to set the path. / Start signaling for deletion. The instruction here includes not only real-time path setting instruction but also reservation execution in reservation. That is, when the edge device 100 receives the reservation information, the edge device 100 holds the reservation information. When the time specified in the reservation information comes, a path setting request corresponding to the reservation information is notified to the resource control unit 106 and the like.

  It is not essential to include the priority in the path setting request. For example, the priority for each path type may be stored in the storage unit of the edge device 100 in advance, and the priority corresponding to the path type related to the path setting request may be read from the storage unit and used.

  The signaling control units 102 and 202 transmit and receive signaling messages using the IP addresses of the endpoints (IP address corresponding to the input UNI port and IP address corresponding to the output UNI port) included in the path setting instruction or the like. That is, the signaling control unit 102 of the transmission-side edge device 100 transmits and receives signaling messages using the IP address corresponding to the input UNI port as the source (connection source) IP address, and the signaling control unit of the reception-side edge device 200 202 transmits / receives a signaling message by associating the IP address of the destination (connection destination) of the signaling message with the output UNI port.

  For example, when the path setting signaling is completed and the path of the relay network 300 is established (the label table is set in each node), the signaling control unit 102 of the transmitting edge device 100 uses the signaling Data for referring to the UNI address storage unit 105 based on the IP address of the source (connection source), grasping the input UNI port corresponding to the IP address, and connecting the UNI port and the path of the relay network set by signaling The transfer information is stored in the data transfer information storage unit 104. Further, the signaling control unit 202 of the receiving edge device 200 refers to the UNI address storage unit 205 based on the IP address of the destination (connection destination) used for signaling, grasps the output UNI port corresponding to the IP address, Data transfer information for connecting the grasped output UNI port and the relay network path is stored in the data transfer information storage unit 204.

  The signaling control unit 102 includes the priority included in the path setting request in the control message for path setting as a value such as holding priority, setup priority, and the like, and each link determines resource contention based on these values. Control of the solution is made.

  The resource control units 106 and 206 are functional units that perform resource control as described with reference to FIGS.

  The resource control unit 106 of the edge device 100 includes a resource information storage unit 107. The resource information storage unit 107 stores information necessary for determining whether there is a resource for setting a new path. For example, the resource information storage unit 107 stores information indicating whether each input UNI port is in use or free, the priority for each set path (including UNI port information to be used), and the maximum that the edge device 100 can use. , The amount of resources currently used in the edge device 100 (the amount used in each path), information indicating the usage status of the access line, and the like are stored. The resource control unit 106 has means such as an information collection unit for keeping the information stored in the resource information storage unit 107 up to date.

  The resource control unit 206 on the edge device 200 side includes a resource information storage unit 207. The resource information storage unit 207 also stores information necessary for determining whether there is a resource for setting a new path. For example, the resource information storage unit 207 stores information indicating whether each output UNI port is in use or free, the priority for each set path (including UNI port information to be used), and the maximum that the edge device 200 can use. , The amount of resources currently used by the edge device 200 (the amount used in each path), information indicating the usage status of the access line, and the like are stored. The resource control unit 206 has means such as an information collection unit for keeping the information stored in the resource information storage unit 207 up to date.

  The resource information storage units 107 and 207 are not necessarily provided in the edge device. For example, the resource information storage units 107 and 207 are externally provided via a network, and the resource control units 106 and 206 are provided via the network. It may be referred to a database server or the like.

  Both of the resource control units 106 and 206 refer to resource information storage means for storing resource information related to the UNI port when there is a path setting request for requesting setting of a path having the UNI port as a start point or an end point. A determination unit that determines whether or not there is a resource related to the UNI port for setting the path, and the determination unit determines that the resource for setting the path is insufficient In addition, based on the priority of the path and the priority of the already set path, a resource used for the already set path is set as a path resource related to the path setting request. It is an example of a functional part provided with the control means which performs control for using.

  Each edge device according to the present embodiment can be realized by causing a communication device having a computer function such as a router to execute a program corresponding to the processing described in the present embodiment. The program may be stored in a storage medium such as a portable memory, distributed, installed in the communication device, or downloaded from a server on the network and installed in the communication device. Further, the processing described in the present embodiment may be realized as a hardware circuit, and the hardware circuit may be provided in the communication device.

<Operation example>
Processing related to resource control executed by each edge device in setting a new path will be described with reference to the sequence diagram of FIG.

  First, the edge device 100 receives a path setting request (step 11). In this embodiment, the path setting request includes the IP address of the input UNI port, the IP address of the output UNI port, the bandwidth used for the path, and the priority. The path setting request may or may not include route information. When the route information is not included, for example, the edge device 100 performs a route search to calculate an optimum route.

  In the edge device 100, the path setting request is passed to the resource control unit 106. The resource control unit 106 refers to the UNI address storage unit 105 and grasps the input UNI port corresponding to the IP address included in the path setting request. Then, it is determined whether there is a resource for setting the requested path with reference to the resource information storage unit 107 (step 12). The determination here is, for example, whether or not the input UNI port used by the requested path is free, and whether or not there is a resource (processing capability) in the edge device 100 that can correspond to the bandwidth of the requested path. This is done by determining whether or not there is sufficient free bandwidth on the access line corresponding to the input UNI port of the path. If there is a resource, the process proceeds to the path setting process in step 14.

  If there is a shortage of resources, the priority of the path that has already been set is compared with the priority of the new path for the request, and the resource is used by a path with a low priority (high priority value). (Resource is released) and the resource is made available for the path to be set (step 13). In step 13 of this example, it is assumed that the resource of the new path can be covered by canceling the resource use of the low priority path and allocating it to the new path. If there is no appropriate priority path that can be used by preemption of the resource, or if the resource of the new path cannot be covered even if resource preemption is performed, for example, an error message is returned to the path setting request source and processed. Cancel.

  After step 13, the process proceeds to step 14 where a path setting process is performed. In addition, path deletion is performed for paths that release resources. The control message in the path setup signaling includes the priority value included in the path setup request as, for example, holding priority and setup priority. Resource preemption can be performed.

  In the edge device 200 that has received the control message for path setting, the control message is passed to the resource control unit 206 (step 21). This control message is an example of a path setting request received by the edge device 200. The resource control unit 206 refers to the UNI address storage unit 205 and grasps the output UNI port corresponding to the IP address included in the control message. Then, the resource information storage unit 207 is referenced to determine whether there is a resource for setting the requested path. The determination here is, for example, whether the output UNI port used by the requested path is free, whether there is a resource in the edge device 200 that can correspond to the bandwidth of the requested path, and the output UNI of the requested path. This is done by determining whether or not there is sufficient free bandwidth on the access line corresponding to the port. If there is a resource, the path setting process in step 24 is performed.

  If there is a shortage of resources, the priority of the path that has already been set is compared with the priority of the new path, and use of resources by paths with lower priority (higher priority values) is stopped. (Release the resource) and make the resource available for the path to be set (step 23). Here, in order to connect a new path, a setting for connecting the relay-side path and the output UNI port is made. In step 23 of this example, it is assumed that the resource of the new path can be covered by canceling the resource use of the low priority path and assigning it to the new path. If there is no appropriate priority path that can be used by preemption of resources, or if resource preemption does not cover new path resources, for example, a PathErr message is sent to the signaling source. Return the error message to the path setting request source and stop processing.

  After step 23, the process proceeds to step 24, where a path setting process is performed. Here, for example, a response message (Resv or the like) is returned to the edge device 100, and the edge device 100 is configured to connect the relay side path and the output UNI port for the new path.

  Note that if the priority of a path that has already been set is the same as the priority of a new path, resource preemption may not be performed, or resource preemption may be performed with priority given by some criteria. Also good. For example, the IP address assigned to the UNI port at the end point of the already set path is compared with the IP address assigned to the UNI port at the end point of the new path (end point on the same side as the above end point) as a numerical value. It is possible to perform control such that priority is given to a larger value (or smaller value).

  Also, low priority paths that have been deprived of resources are automatically reconfigured and communicated after communication of high priority paths that have deprived of resources (eg after a path has been deleted). You may make it resume.

  As described above, according to the present embodiment, it is possible to determine resource allocation based on the priority of the control session for each link in the UNI port / UNI resource and the relay section, including the UNI. It is possible to control communication between end-to-end LSPs based on priority.

The configurations disclosed in this specification are listed below.
(Section 1)
An edge node device in a communication network that provides a communication service by setting a path,
UNI port for connecting to user equipment,
When there is a path setting request for requesting setting of a path having the UNI port as a start point or an end point, the resource information storage unit that stores resource information related to the UNI port is referred to, and the path for setting the path A determination means for determining whether there is a resource related to the UNI port;
When it is determined by the determination means that the resource for setting the path is insufficient, the already set based on the priority of the path and the priority of the already set path. Control means for performing control to use the resource used for the path being used as the resource of the path related to the path setting request;
An edge node device comprising:
(Section 2)
Signaling control means for performing signaling in the control plane with the opposite edge node device via the relay network in the communication network,
2. The edge node apparatus according to claim 1, wherein the signaling control means performs signaling by including a path priority related to the path setting request in a control message.
(Section 3)
The signaling control means controls the path between the UNI port and the UNI port of the opposite edge node device by performing signaling using an IP address associated with the UNI port. The edge node device according to item 2.
(Section 4)
When the priority of the path related to the path setting request and the priority of the already set path are the same, the IP address associated with the UNI port of the end point of the path related to the path setting request and the 4. The edge node device according to item 3, wherein the level of priority is determined by comparing with an IP address associated with a UNI port at an end point of an already set path.
(Section 5)
The resource to be determined by the determining unit includes the processing capability of the edge node device, the access line resource, and the presence or absence of a usable UNI port. The edge node device according to item.
(Section 6)
The edge node device according to any one of claims 1 to 5, wherein the UNI port is a non-IP interface.
(Section 7)
A resource control method executed by an edge node device in a communication network that provides a communication service by setting a path,
The edge node device includes a UNI port for connecting to a user device,
When there is a path setting request for requesting setting of a path having the UNI port as a start point or an end point, the resource information storage unit that stores resource information related to the UNI port is referred to, and the path for setting the path A determination step of determining whether there is a resource related to the UNI port;
When it is determined by the determination step that the resource for setting the path is insufficient, the already set based on the priority of the path and the priority of the already set path. A control step for performing control to use a resource used for the path being used as a resource of the path related to the path setting request;
A resource control method comprising:
(Section 8)
The program for functioning the communication apparatus containing the function of a computer as each means in the said edge node apparatus of any one of Claim 1 thru | or 6.

  The present invention is not limited to the above-described embodiments, and various modifications and applications are possible within the scope of the claims.

10, 20 Edge device 30 Relay network 100, 200 Edge device 101 Input UNI port 102, 202 Signaling control unit 103, 203 Data transfer control unit 104, 204 Data transfer information storage unit 105, 205 UNI address storage unit 106, 206 Resources Control unit 107, 207 Resource information storage unit

Claims (8)

An edge node device in a communication network that provides a communication service by setting a path,
An interface for connecting to a user device;
A resource for setting the path by referring to resource information storage means for storing resource information including the interface as a resource when there is a path setting request for setting a path having the interface as a start point or an end point. Determination means for determining whether or not there is,
When it is determined by the determination means that an interface for setting the path is insufficient, the path is already set based on the priority of the path and the priority of the path that has already been set. an interface against it are paths are used, and a control unit that performs control to use as an interface path according to the path setting request,
An edge node device comprising: Signaling control means for performing signaling in the control plane with the opposite edge node device via the relay network in the communication network,
The edge node device according to claim 1, wherein the signaling control means performs signaling by including a priority of a path related to the path setting request in a control message.   3. The signaling control means performs control of a path between the interface and an interface of an opposite edge node device by performing signaling using an IP address associated with the interface. The edge node device described in 1.   When the priority of the path related to the path setting request and the priority of the already set path are the same, the IP address associated with the interface of the end point of the path related to the path setting request and the already set path 4. The edge node device according to claim 3, wherein the level of priority is determined by comparing with an IP address associated with an interface at an end point of a set path.   The edge according to any one of claims 1 to 4, wherein the resource to be determined by the determining means includes processing capability of the edge node device, access line resource, and usable interface. Node device.   The edge node device according to any one of claims 1 to 5, wherein the interface is a non-IP interface. A resource control method executed by an edge node device in a communication network that provides a communication service by setting a path,
The edge node device includes an interface for connecting to a user device,
A resource for setting the path by referring to resource information storage means for storing resource information including the interface as a resource when there is a path setting request for setting a path having the interface as a start point or an end point. A determination step of determining whether or not there is,
When it is determined by the determination step that an interface for setting the path is insufficient, the path is already set based on the priority of the path and the priority of the already set path. an interface against it are paths are used, and a control step of performing control for use as an interface path according to the path setting request,
A resource control method comprising:   The program for functioning the communication apparatus containing the function of a computer as each means in the said edge node apparatus of any one of Claims 1 thru | or 6.

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