WO2012114747A1 - Système de réseau de communication, dispositif formant nœud et procédé de contrôle d'acheminement - Google Patents

Système de réseau de communication, dispositif formant nœud et procédé de contrôle d'acheminement Download PDF

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Publication number
WO2012114747A1
WO2012114747A1 PCT/JP2012/001222 JP2012001222W WO2012114747A1 WO 2012114747 A1 WO2012114747 A1 WO 2012114747A1 JP 2012001222 W JP2012001222 W JP 2012001222W WO 2012114747 A1 WO2012114747 A1 WO 2012114747A1
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Prior art keywords
path
control
time
network management
information
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PCT/JP2012/001222
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English (en)
Japanese (ja)
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晋哉 石田
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日本電気株式会社
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L41/00—Arrangements for maintenance, administration or management of data switching networks, e.g. of packet switching networks
    • H04L41/08—Configuration management of networks or network elements
    • H04L41/0803—Configuration setting
    • H04L41/084—Configuration by using pre-existing information, e.g. using templates or copying from other elements
    • H04L41/0846—Configuration by using pre-existing information, e.g. using templates or copying from other elements based on copy from other elements

Definitions

  • the present invention relates to a communication network control technique, and more particularly, to a communication network system, a node device, and a path control method capable of efficiently controlling a node, improving traffic accommodation efficiency and guaranteeing service quality.
  • Cloud services are expanding as a means to provide information processing services to users at low cost.
  • the user owns the information infrastructure by himself and needs the work of design, operation, management and maintenance.
  • the cost required for the work of designing, operating, managing and maintaining information infrastructure continues to increase.
  • cloud services provide virtual information infrastructure by deploying equipment with information processing functions in data centers owned by service providers and lending those functions to users. To do. For the user, it is not necessary to maintain the information infrastructure itself, and it is possible to use as many information infrastructure resources as necessary, so that the cost required for the information infrastructure can be reduced.
  • the operator side prepares a computer infrastructure and a communication infrastructure in the data center and a communication infrastructure for connecting between the user and the data center or between the data centers, and the efficiency is improved. It must operate well.
  • the main purpose of the user is an information processing service implemented in the data center, and is to be able to access the service when necessary. Therefore, in the cloud service, the communication infrastructure is necessary for inputting / outputting information between the user or a server that holds the user information and the computer that performs the information processing service. There is no great value. For this reason, the communication infrastructure in the cloud service has a strong meaning of the cost generation source, and therefore further cost improvement is required.
  • Operational costs are reduced by optimizing the method of accommodating services or traffic within the communication network, that is, the route and bandwidth allocation method; improving the efficiency of business processes by increasing the efficiency of communication resource usage and automation of operational tasks; and personnel This is achieved by reducing costs or reducing power consumption by reducing power consumption.
  • all of these increases in efficiency are possible only after the amount of service and traffic to be accommodated is known.
  • an operator In order to provide a cloud service, an operator must have a communication infrastructure that can reliably provide a necessary amount of communication bandwidth to a place where the user needs it.
  • the demand for this type of service is highly dependent on the user's judgment as to when it occurs, the amount of bandwidth required, and where it is required, and many users who use various services are everywhere in the communication network. In distributed situations, it is very difficult to predict.
  • Patent Document 2 One countermeasure against such a problem is disclosed in Patent Document 2.
  • path control information is supplied in advance from a network management device to each node device, and when each node reaches a designated time, path control information is selected and autonomous path connection control is performed.
  • the path connection control can be executed at the specified time.
  • Patent Document 2 has a problem that the facility cost increases as the network size increases, and the processing load of the network management device also increases.
  • the system of Patent Document 2 is applied to a system having a large number of users such as a cloud service, the equipment cost and network management load on the business operator are very large.
  • an object of the present invention is to solve the above-mentioned problems, enable a large number of path control tasks to be executed at a specified time, suppress an increase in equipment costs, and ensure network management scalability.
  • a node device and a path control method are provided.
  • a node device is a node device in a communication network system in which a plurality of node devices are linked and managed by a network management device, and includes a time synchronization means for performing time synchronization with the network management device, Reception means for receiving path control task information related to a path to be set with a node device as an end point from the network management apparatus, storage means for storing the path control task information, and signaling based on the path control task information And control means for executing path control.
  • a path control method for a node device is a path control method for a node device in a communication network system in which a plurality of node devices are linked and managed by a network management device, and a time synchronization means is connected to the network management device. Synchronize time, receive path control task information related to the path to be set from the node device as an end point, store it in the storage means, and start signaling based on the path control task information The path control is executed.
  • a communication network system is a communication network system in which a plurality of node devices are linked and includes a network management device that manages the plurality of node devices, and the network management device controls a path according to a communication request. And scheduling means for scheduling the time for executing the control, and communication control means for transmitting path control task information indicating the path control and the time for executing the control only to the node device for starting the path setting signaling And a node device serving as a start point of path setting signaling among the plurality of node devices sets time synchronization means for performing time synchronization with the network management device, and sets the own node device as an end point.
  • Path management task information relating to a power path to the network management device
  • a large number of path control tasks can be executed at a specified time, and an increase in equipment cost can be suppressed to ensure network management scalability.
  • FIG. 1 is a block diagram showing configurations of a network management device and a node device in the communication network system according to the first embodiment of the present invention.
  • FIG. 2 is a network diagram showing an example of a network configuration for explaining the operation of the communication network system according to the first embodiment.
  • FIG. 3 is a flowchart showing the scheduling process of the network management device in the first embodiment.
  • FIG. 4A is a format diagram showing an example of information stored in the schedule database of the network management device.
  • FIG. 4B is a format diagram illustrating another example of information stored in the schedule database of the network management device.
  • FIG. 5 is a sequence diagram showing the operation of the communication network system according to the first embodiment.
  • FIG. 6A is a format diagram showing an example of information stored in the schedule database of the node device.
  • FIG. 6B is a format diagram illustrating another example of information stored in the schedule database of the node device.
  • FIG. 7 is a block diagram showing the configuration of the network management device and the node device in the communication network system according to the second embodiment of the present invention.
  • FIG. 8 is a network diagram showing an example of a network configuration for explaining the operation of the communication network system according to the second embodiment.
  • the network management device transmits the path control task information only to the node that starts path setting signaling, thereby reducing the number of nodes that execute the task synchronization processing for time synchronization and path control.
  • a communication network system includes a network management device 100, two node devices 200 and 201, and a communication request device 300.
  • the system which becomes is illustrated.
  • the example of the minimum network configuration in which two node devices are provided is for the sake of simplicity and is not limited to this configuration.
  • the present invention is also applicable to a network having three or more node devices. In the present embodiment, no restrictions are imposed on the number of links between nodes. Furthermore, there is no restriction on the shape of the network configured by connecting nodes with links.
  • a network management apparatus 100 shown in FIG. 1 includes a communication unit 110, a resource management database 120, a schedule database 130, a schedule control unit 140, a clock 150, and a communication unit 160.
  • the communication unit 110 is a communication interface that is connected to the communication request apparatus 300 through a link 900 in a communicable state, and receives a communication request message from the communication request apparatus 300.
  • the communication unit 110 may be logically present, and the entity thereof may be the same as the entity of the communication unit 160.
  • the link 900 may be wired (copper wire, optical fiber, etc.) or wireless.
  • the communication method between the communication unit 110 and the communication requesting device 300 is not limited to a specific method as long as the communication request message can be transmitted and received. Examples of the communication requesting device 300 include a user network management terminal, a user network gateway device, and a server used by a user for service.
  • the resource management database 120 records at least the topology information of the communication network, the bandwidth of each link and the usage status of the link, the path using the bandwidth of each link, and the service or user information to which each path is assigned. Hold.
  • the entity of the resource management database 120 may be configured on a volatile storage device such as a RAM (Random Access Memory) or a non-volatile storage device such as a hard disk or a flash memory.
  • the schedule database 130 records and holds at least information indicating communication requests that are or are not being provided, the path and bandwidth of the path assigned to each communication request, and the period during which the service is provided. Examples of the information indicating the period during which the service is provided include a service provision start time and an end time, or a service provision start time and a service provision time. Similar to the resource management database 120, the schedule database 130 may be configured on a volatile storage device such as a RAM (Random Access Memory) or a non-volatile storage device such as a hard disk or a flash memory. It doesn't matter.
  • a volatile storage device such as a RAM (Random Access Memory) or a non-volatile storage device such as a hard disk or a flash memory. It doesn't matter.
  • the schedule control unit 140 receives the communication request message received from the communication requesting device 300 from the communication unit 110, determines the path and bandwidth of the path to be set for providing the communication service, the time and time for providing the communication service, They are recorded in the schedule database 130.
  • the schedule control unit 140 stores the communication resource information stored in the resource management database 120 and the schedule database 130 in order to determine the path and bandwidth of the path for providing the communication service, the provision time and the provision time. Information on current and future service delivery plans is available. Further, as will be described later, the schedule control unit 140 sets information (path control task information) indicating the path and bandwidth of the path determined according to the communication request message, and the time and time for providing the communication service. Transmit only to the node device that initiates the signaling. Note that the schedule control unit 140 includes a route calculation unit and a bandwidth allocation unit inside or outside the path calculation unit and the bandwidth allocation unit in order to determine the path and bandwidth of the path used for service provision.
  • the clock 150 holds the current time.
  • the time held by the clock 150 can be referred to from the schedule control unit 140.
  • the time information held by the clock 150 may be set based on time information obtained from a time generation source (not shown).
  • the communication unit 160 is a communication interface for the network management device 100 to transmit and receive control messages to and from the node devices 200 and 201.
  • the communication unit 160 may be logically present, and the entity may be the same as the entity of the communication unit 110 as described above.
  • the path management task information is transmitted to the node device 200 that is the starting point of the path to be set by the network management device 100.
  • the node devices 200 and 201 include communication units 210 and 211, switches 220 and 221, schedule databases 230 and 231, switch control units 240 and 241, clocks 250 and 251, and control communication units 260 and 261, respectively.
  • the in this embodiment since the node devices 200 and 201 have the same functional configuration, the configuration of the node device 200 will be described below.
  • the communication unit 210 is a communication interface for transmitting / receiving a control message to / from the network management apparatus 100.
  • the communication unit 210 of the node device 200 is connected to the communication unit 160 of the network management device 100 through a control channel 901 in a communicable state.
  • the form of the control channel 901 may be either wired (copper wire, optical fiber, etc.) or wireless.
  • the communication method between the communication unit 210 and the communication unit 160 is not limited to a specific method as long as the communication request message can be transmitted and received.
  • the communication unit 211 of the node device 201 is connected to the communication unit 160 of the network management device 100 through a control channel 902 in a communicable state.
  • the switch 220 is a device capable of packet switching or circuit switching for transferring traffic.
  • the switch 220 of the node device 200 is connected to the switch 221 in the node device 201 by a data link 903 for transferring traffic.
  • the link 903 may be a physical link, a logical or pseudo link constituted by a line such as a path, or a set of a plurality of links.
  • the links constituting the link 903 may be either wired (copper wire, optical fiber, etc.) or wireless.
  • the schedule database 230 records and holds the control schedule of the node device 200.
  • the schedule database 230 records and holds at least the control information of the path being set or scheduled to be set in the node device 200 and information indicating the period during which the service is provided.
  • the path control information includes information indicating the path input / output ports and the path bandwidth in the switch 220.
  • the schedule database 230 may be configured on a volatile storage device such as a RAM (Random Access Memory), or may be configured on a nonvolatile storage device such as a hard disk or a flash memory.
  • the switch control unit 240 controls the switch 220.
  • the switch control unit 240 receives a switch control message from the network management apparatus 100 via the communication unit 210.
  • the switch control message includes path control information and information (path control task information) indicating control time
  • the switch control unit 240 records the content of the received switch control message in the schedule database 230.
  • the path is set or deleted by executing the specified switch control at the time specified in the message.
  • the clock 250 holds the current time.
  • the time held by the clock 250 can be referred to from the switch control unit 240.
  • the control communication unit 260 is connected to the control communication unit 261 of the node device 201 in a communicable state via the inter-node device control channel 904.
  • the node device control channel 904 may be wired (copper wire, optical fiber, etc.) or wireless.
  • the shape of the control network composed of the node devices and the inter-node device control channel may not coincide with the shape of the data communication network composed of the node devices and the data link.
  • the entity constituting the inter-node device control channel 904 may be constituted by a device or medium different from the entity of the data link 903, or a part or all of the entity may be constituted by the device or medium constituting the data link 903. It may be configured.
  • the communication method between the control communication unit 260 and the control communication unit 261 is not limited to a specific method as long as the communication request message can be transmitted and received.
  • the network management apparatus N101 corresponds to the network management apparatus 100 in FIG. 1, and each of the node apparatuses N201 to N204 corresponds to the node apparatuses 200 and 201 in FIG.
  • the user requests the network management apparatus N101 for a communication request from N301 to N302.
  • This communication request is sent to the network management apparatus N101 from the user side node apparatus N301 or N302 or another communication request apparatus not shown in FIG.
  • the user side node device N301 or N302 corresponds to the position of the communication requesting device 300 in FIG.
  • the time of the clock 250 provided in each of the node devices N201 to N204 is synchronized with the time of the clock 150 in the network management device N101.
  • the clock 150 and 250 acquire time information from a method of acquiring the time information of the clock 150 via the communication units 160 and 210 or other communication units, or from an external source of time information, respectively.
  • Specific means of clock time synchronization include NTP (Network Time Protocol), IEEE 1588, Synchronous Ethernet, GPS (Global Positioning System), and the like.
  • the user-side node devices N301 and N302 may not be time synchronized with the network management device N101, or may each have a clock equivalent to the clock 250 and be synchronized with the network management device N101.
  • the network management apparatus N101 When receiving a communication request as described below, the network management apparatus N101 performs processing for the communication request.
  • the schedule control unit 140 in the network management apparatus N101 determines the path, bandwidth, and allocation time for the received communication request (step S1010).
  • the path, bandwidth and allocation time of the path can be determined by the following method (1) or (2), for example.
  • the schedule control unit 140 determines the path P101 for the communication request. This route calculation can be performed by, for example, the Dijkstra method or a route design server described in Japanese Patent No. 4289098. Next, a time during which a necessary bandwidth amount can be secured on the route is searched. The necessary bandwidth and communication time can be calculated from the traffic amount information included in the communication request.
  • the schedule control unit 140 checks the resource usage status on the path of the path P101 at each time, and obtains a start time when path setting is possible. Note that the resource usage status in the network at each time is obtained from the schedule database 130 based on the current resource usage status that can be acquired from the resource management database 120. Obtained and obtained by synthesizing them.
  • the schedule control unit 140 examines the network resource usage status at each time, and searches for available routes and bands and their available start times during the communication time.
  • the schedule control unit 140 selects one solution for the path P101 from the search result. This solution selection method is based on the content of the communication request from the user and the operator's network operation, such as the fastest time from the current time to the path provision, the shortest communication cost, the shortest route length, etc. Applicable according to policy.
  • the schedule control unit 140 records the determined path route, bandwidth, and allocation time information in the schedule database 130 (step S1020). Examples of information recorded in the schedule database 130 are shown in FIGS. 4A and 4B.
  • the recorded information includes at least a path identifier 1101, a path transmission node 1102, a path reception node 1103, a traffic route 1104, a path bandwidth 1105, a path setting start time 1106, and a path. 7 types of information of setting end time 1107 are included.
  • a path identifier 1101, a path transmission node 1102, a path reception node 1103, a traffic route 1104, a path bandwidth 1105, a path setup start time 1106 and a path setup time 1108 7.
  • the schedule control unit 140 transmits information on the determined path, bandwidth, and allocated time of the path as a control task only to the node N201 that is the end point of the path (here, the transmission end) (step S1030).
  • the information to be transmitted includes the information shown in FIG. 4A or 4B.
  • the switch control unit 240 As shown in FIG. 5, when the node device N201, which is the transmission node of the path P101, receives control task information from the network management device N101 via the control channel 901 (step S1301), the switch control unit 240, for example, FIG. 4A or 4B The control task information described above is stored in its own schedule database 230 in the format shown in FIG.
  • the switch control unit 240 starts signaling for setting the path P101 when it is time to create the path P101 according to the control task information stored in the schedule database 230 (step S1302).
  • this signaling method for example, there are RSVP (Resource reSerVation Protocol) used for path control in MPLS (Multi-Protocol Label Switching) and GMPLS (Generalized MPLS).
  • RSVP Resource reSerVation Protocol
  • MPLS Multi-Protocol Label Switching
  • GMPLS Generalized MPLS
  • switch control units 240 and 241 correspond to adding or updating entries in the routing table on the memory if the switches 220 and 221 are electrical switches such as routers, L2 switches, and electrical cross-connects. Or if the substance of switch 220,221 is an optical switch, it corresponds to the hardware control in an optical switch.
  • the switch control unit 240 starts signaling for deleting the path P101 when it is time to delete the path P101 (step S1304).
  • the path control message used for this signaling is transmitted / received via the inter-node-device control channel 904 by the control communication units 260 and 261 of each node device.
  • the path P101 is deleted (step S1305).
  • the entry corresponding to the path deleted from each of the schedule databases 230 and 231 is deleted.
  • each link is not particularly limited, and may be a wired link such as a copper wire or an optical fiber, or a link by wireless communication.
  • the node apparatus N201 stores information corresponding to each node apparatus on the path of the path in the schedule database 230 in the format shown in FIG. 6A or 6B based on the control task information received from the network management apparatus N101. It is also possible to transmit corresponding information to each node device.
  • control task information corresponding to each node device includes a path identifier 1201, a path transmission node 1202, a path reception node 1203, a traffic input 1204, a traffic output 1205, and a path bandwidth. 1206, 8 types of information including a path setting start time 1207 and a path setting end time 1208 are included.
  • FIG. 1 control task information corresponding to each node device includes a path identifier 1201, a path transmission node 1202, a path reception node 1203, a traffic input 1204, a traffic output 1205, and a path bandwidth.
  • the control task information corresponding to each node device includes path identifier 1201, path transmission node 1202, path reception node 1203, traffic input 1204, traffic output 1205, path 8 types of information including a bandwidth 1206, a path setting start time 1207, and a path setting time 1209.
  • the traffic input 1204 and output 1205 store, in addition to the identifier of the adjacent node and the input / output port identifier of the switch, any one of the information indicating the input / output port and its bandwidth, such as the label, time slot, and wavelength. .
  • each of the node devices N201 to N203 controls the switch 220 of its own node at the time of creating a path according to the control task stored in each schedule database 230, and is represented in FIG. 6A or 6B.
  • the communication of the existing path is made conductive.
  • the role of this switch control is equivalent to adding or updating entries in the route table on the memory if the switch 220 is an electrical switch such as a router, L2 switch, or electrical cross-connect.
  • the switch 220 is an optical switch, it corresponds to hardware control in the optical switch.
  • the switch 220 of the own node is controlled to delete the path shown in FIG. 6A or 6B.
  • this switch control corresponds to deletion or update of the route table entry in the memory if the switch 220 is an electrical switch such as a router, L2 switch, or electrical cross-connect. Alternatively, if the switch 220 is an optical switch, it corresponds to hardware control in the optical switch. Further, the entry corresponding to the deleted path is deleted from each schedule database 230.
  • the network management device transmits path control task information only to a node that initiates path setting signaling, and the node performs time synchronization and path A control task scheduling process is executed, and a path is set by signaling. Therefore, the number of nodes that execute task synchronization processing for time synchronization and path control can be reduced, many path control tasks can be executed according to the specified time, and the increase in equipment cost and the scalability of network management are ensured. Can be achieved.
  • the network management device transmits path control task information only to the node that starts path setting signaling. Therefore, the configuration of the nodes other than the node device that can be the starting point of signaling can be simplified, and the facility cost can be further reduced.
  • a second embodiment of the present invention will be described in detail with reference to the drawings.
  • a communication network system is exemplified by a system including a network management device 100, two node devices 200 and 400, and a communication requesting device 300. To do.
  • the example of the minimum network configuration in which two node devices are provided is for the sake of simplicity and is not limited to this configuration.
  • the present invention is also applicable to a network having three or more node devices. In the present embodiment, no restrictions are imposed on the number of links between nodes. Furthermore, there is no restriction on the shape of the network configured by connecting nodes with links.
  • the network management device 100 shown in FIG. 7 has the same configuration and function as the network management device 100 in the first embodiment shown in FIG.
  • a node device 200 shown in FIG. 7 is a node device that can be a starting point of signaling in the present embodiment, and has the same configuration and function as the node device 200 in the first embodiment shown in FIG. The description is omitted.
  • the node device 400 shown in FIG. 7 corresponds to a node device other than the node device that can be the starting point of signaling, and the configuration is simplified. That is, the node device 400 is obtained by removing the cooperation function of the communication unit 210, the schedule database 230, and the clock 250 from the node device 201 in FIG. 1, and includes a control communication unit 261, a switch control unit 401, and a switch 221 for signaling.
  • the configuration shown in FIG. 8 is illustrated as a network configuration corresponding to the communication network shown in FIG.
  • N201 and N203 which are edge nodes adjacent to the user side node devices N301 and N302, respectively, are node devices 200 that can be signaling start points
  • the other node devices N402 and N404 are node devices 400.
  • the network management device N101 is connected to the node devices N201 and N203 via the control channels L301 and L303, respectively.
  • the arrangement of the node device having the configuration of the node device 200 and the node device having the configuration of the node device 400 does not depend only on whether or not the node device is an edge node. That is, in this embodiment, the edge node can be configured as the node device 400 as long as it is not the starting point of signaling. Further, the node device 200 can be configured in a node device other than the edge node.
  • the network control operation in the second embodiment is that time synchronization is not performed between the network management device N101 and the node devices N402 and N404, and between the network management device N101 and the node devices N402 and N404. Except for the two points that control task information is not transmitted and received, the description is omitted because it is the same as the network control operation described with reference to FIG.
  • each link is not particularly limited, and may be a wired link such as a copper wire or an optical fiber, or a link by wireless communication.
  • the network management device 100 and the node devices 200, 201, and 400 of FIG. 1 and FIG. 7 each have a program stored in a memory on a computer (program control processor, CPU, etc.).
  • program control processor CPU, etc.
  • the above-described functions can also be realized by executing.
  • the control means sets the path by signaling according to the path route information and the band information when the set time of the path is reached, and releases the path by signaling at the same time when the set path is released.
  • the node device according to appendix 2 characterized by: (Appendix 4) A node device path control method in a communication network system in which a plurality of node devices are linked and managed by a network management device, Time synchronization means performs time synchronization with the network management device, Receiving from the network management device path control task information related to the path to be set with its own node device as an end point, and storing it in the storage means; Starting signaling based on the path control task information and executing path control; A path control method for a node device.
  • the path control task information includes path information of a path to be set with its own node device as an end point, bandwidth information of the path, and time information indicating a time for setting and releasing the path, Starting the signaling based on the path route information and the bandwidth information according to the time information;
  • the node device path control method according to appendix 5, wherein: (Appendix 7) A communication network system having a network management device that links a plurality of node devices and manages the plurality of node devices, Scheduling means for scheduling control of a path according to a communication request and a time for executing the control by the network management device; Communication control means for transmitting path control task information indicating the path control and the time to execute the control only to the node device that starts the path setting signaling; Have Among the plurality of node devices, a node device serving as a starting point of path setting signaling, Time synchronization means for performing time synchronization with the network management device; Receiving means for receiving, from the network management device, path control task information related to a path to be set with its own node device as an end point; Storage means for storing the path control task information; Control means for performing path control by starting signaling based on the path control task information; A communication network system characterized by comprising: (Appendix 8) The communication network system according to app
  • the communication network system according to appendix 7 or 8, wherein a switch control message transmitted to the node device includes the path control task information.
  • the network management device further comprises clock means for holding current time, and storage means for storing topology information and resource information of the communication network system;
  • the scheduling means schedules the path and bandwidth of the path and the set time and release time of the path with reference to the topology information and resource information in order to set a path according to the communication request;
  • the communication control means transmits the path control task information including route information and bandwidth information of the path and time information indicating the path setting time and release time to a node device serving as a starting point of the path;
  • the communication network system according to any one of appendixes 7-9, wherein (Appendix 11)
  • the control means of the node device that is the starting point of the path sets the path by signaling according to the path route information and the bandwidth information when the path setting time comes, and when the set path release time comes
  • the communication network system according to appendix 10, wherein the path
  • a node device other than the node device serving as a starting point of the path among the plurality of node devices includes a communication unit for performing the signaling and a path control unit for performing path control according to the signaling.
  • the communication network system according to attachment 10.
  • a network management apparatus comprising: (Appendix 14) 14.
  • the network management device according to appendix 13, wherein the node device that starts path setting signaling is a node device that is predetermined as a starting point of path setting signaling among the plurality of node devices.
  • (Appendix 15) 15 15. The network management device according to appendix 13 or 14, wherein a switch control message transmitted to the node device includes the path control task information.
  • the scheduling means schedules the path and bandwidth of the path and the set time and release time of the path with reference to the topology information and resource information in order to set a path according to the communication request;
  • the communication control means transmits the path control task information including route information and bandwidth information of the path and time information indicating the path setting time and release time to a node device serving as a starting point of the path; Item 16.
  • the network management device according to any one of additional items 13-15, (Appendix 17) A program for realizing a path control function in a program control processor of a node device in a communication network system in which a plurality of node devices are linked and managed by a network management device, A time synchronization function for performing time synchronization with the network management device; A reception function for receiving, from the network management device, path control task information related to a path to be set with its own node device as an end point; A storage function for storing the path control task information; A control function for performing path control by starting signaling based on the path control task information; Is realized by the program control processor.
  • the path control task information includes path information of a path to be set with its own node device as an end point, bandwidth information of the path, and time information indicating a time for setting and releasing the path,
  • the control function sets the path by signaling according to the path route information and the band information when the set time of the path is reached, and releases the path by signaling at the same time when the set path is released.
  • (Appendix 22) The path control device according to appendix 20 or 21, wherein a switch control message transmitted to the node device includes the path control task information.
  • (Appendix 23) Clock means for holding current time; and storage means for storing topology information and resource information of the communication network system;
  • the scheduling means schedules the path and bandwidth of the path and the set time and release time of the path with reference to the topology information and resource information in order to set a path according to the communication request;
  • the communication control means transmits the path control task information including route information and bandwidth information of the path and time information indicating the path setting time and release time to a node device serving as a starting point of the path; Item 23.
  • the path control device according to any one of appendices 20-22, (Appendix 24) A method for controlling a path in a communication network system in which a plurality of node devices are linked, Schedule the path control according to the communication request and the time to execute the control, Transmitting path control task information indicating the path control and the time to execute the control only to the node device that starts the path setting signaling, A path control method characterized by the above. (Appendix 25) 25.
  • the path control method according to appendix 24, wherein the node device that starts path setting signaling is a node device that is predetermined as a starting point of path setting signaling among the plurality of node devices. (Appendix 26) 26.
  • a communication network system having a network management device that links a plurality of node devices and manages the plurality of node devices, Scheduling means for scheduling control of a path according to a communication request and a time for executing the control by the network management device; Communication control means for transmitting path control task information indicating the path control and the time to execute the control only to the node device that starts the path setting signaling; Have Among the plurality of node devices, a node device serving as a starting point of path setting signaling, Time synchronization means for performing time synchronization with the network management device; Control means for starting path control by starting signaling based on the path control task information, when path control task information relating to a path to be set with its own node device as an end point is received from the network management device; Having A communication network system characterized by the above.
  • (Appendix 28) The node device in the communication network system according to attachment 8, wherein the control unit sets the path by the signaling at the set time of the path according to the path control task information, and releases the set path A node device that releases the path by signaling at the same time.
  • (Appendix 29) A network management device of a communication network in which a plurality of node devices are linked, Scheduling means for scheduling control of a path according to a communication request and time for executing the control; Communication control means for transmitting path control task information indicating the path control and the time to execute the control only to the node device that starts the path setting signaling;
  • a network management apparatus comprising:
  • the present invention can be applied to path control in a network in which a plurality of nodes are connected.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention a pour objectif de fournir un système de réseau de communication, un dispositif formant nœud et un procédé de contrôle d'acheminement qui soient aptes à permettre l'exécution d'une pluralité de tâches de contrôle d'acheminement à des moments indiqués, et qui soient aptes d'autre part à supprimer une augmentation des coûts d'équipement de même qu'à garantir une évolutivité de la gestion du réseau. Pour atteindre cet objectif, la présente invention se rapporte à un dispositif formant nœud (200, 201) qui comprend : une horloge (250), pour exécuter une synchronisation temporelle par rapport à un dispositif de gestion de réseau (100) ; un module de communication (210), pour recevoir, du dispositif de gestion de réseau, des données concernant des tâches de contrôle d'acheminement relatives à un chemin devant être défini comme ayant le dispositif formant nœud local en tant que le point limite ; un module de stockage (230), pour stocker les données concernant des tâches de contrôle d'acheminement ; et un module de contrôle (240), pour commencer à envoyer des signaux sur la base des données concernant des tâches de contrôle d'acheminement et pour exécuter un contrôle d'acheminement.
PCT/JP2012/001222 2011-02-23 2012-02-23 Système de réseau de communication, dispositif formant nœud et procédé de contrôle d'acheminement WO2012114747A1 (fr)

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