JP4972110B2 - Bandwidth management apparatus and bandwidth management method - Google Patents

Description

  The present invention relates to a bandwidth management device and a bandwidth management method.

  When providing IP network services such as real-time delivery of voice and moving images, videophones, etc. using session control such as SIP, finely manage network resources in consideration of service quality, IP traffic characteristics, and network configuration It is important to secure network resources and allocate bandwidth required by the service.

  Conventional technologies for managing network resources and allocating bandwidth include abstracting the physical network configuration as a virtual path, holding the abstracted virtual path connection configuration as design data, and responding to requests from the service. There is one that verifies whether or not can be secured on a virtual path and performs band acceptance determination (see, for example, Non-Patent Document 1).

  In addition, as a technique for managing other network resources and allocating a band, a predicted use band is calculated for each transfer quality class, and band acceptance determination is performed based on the calculated predicted band (for example, refer to Patent Document 1).

  As a result, it is possible to verify whether or not each transfer quality class can be secured on the virtual path, and perform bandwidth reception.

  However, in network resource management that manages bandwidth using a virtual path, if bandwidth can be secured in resource management, for example, even if a device constituting the network fails, bandwidth reception is performed. Since the terminal device does not return a session response even if it transmits a session setting request, the session setting request is retransmitted many times, increasing the load on the network.

JP 2007-325224 A

Noriaki Horime, Masahiro Miyasaka, Koji Kishida “Bandwidth management and control technology in NGN” NTT Technical Journal 2008.10.10, p. 22-23

  In the conventional technology for managing network resources and allocating bandwidth as described above, if bandwidth can be secured in resource management, for example, even if a device constituting the network fails, bandwidth reception is performed. Since the terminal device does not return a session response even if it transmits a session setting request, the session setting request is retransmitted many times, which increases the load on the network.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a bandwidth management apparatus and a bandwidth management method that can perform bandwidth management reflecting the state of a network.

  The first bandwidth management device according to the present invention includes configuration information indicating one or more paths constituting an access line terminated by a terminal device, and is transmitted from the terminal device to obtain permission to use the access line. A signal transmission / reception unit that receives a request to transmit, a control unit that controls the signal transmission / reception unit to transmit permission or non-permission to the request to the terminal device, and a plurality of access lines including the access line in advance For all the paths to be configured, each path has bandwidth state information indicating the amount of bandwidth allocated to the path, and refers to the bandwidth state information corresponding to all paths indicated by the configuration information. And a state management unit that determines whether there is a bandwidth available, and for each of the paths that make up the plurality of access lines in advance, for each path, The device state information indicating the state of the device to be responsible for, and the state of determining whether the device can communicate for all the paths with reference to the device state information corresponding to all the paths indicated by the configuration information The management unit has maintenance operation status information indicating a maintenance operation status for each path for all paths that constitute the plurality of access lines in advance, and the maintenance operation status corresponding to all paths indicated by the configuration information A status management unit that determines whether maintenance operation is possible for all the paths by referring to the information, and regulation status information that indicates a communication regulation status for each path for all paths that constitute the plurality of access lines in advance. And with reference to the restriction state information corresponding to all paths indicated by the configuration information, it is determined whether communication restriction is made for all the paths. One or more state management units, and when the control unit obtains a positive determination result from all of the two or more state management units, the signal transmission / reception unit transmits permission to the terminal device On the other hand, when a negative determination result is obtained from one of the state management units, the signal transmission / reception unit performs control so as to transmit a non-permission to the terminal device.

  The second bandwidth management device according to the present invention includes configuration information indicating one or more paths constituting an access line terminated by the terminal device, and is transmitted from the terminal device to obtain permission to use the access line. A signal transmission / reception unit that receives a request to transmit, a control unit that controls the signal transmission / reception unit to transmit permission or non-permission to the request to the terminal device, and a plurality of access lines including the access line in advance For all paths to be configured, band status information indicating the amount of bandwidth allocated to the path is provided for each path, with reference to the bandwidth status information corresponding to the path notified from the control unit. A state management unit that determines whether there is a free bandwidth, and is responsible for communication of the paths for each of the paths that constitute the plurality of access lines in advance. A state management unit that has device state information indicating a state of a communication device, refers to the device state information corresponding to the path notified from the control unit, and determines whether the device can communicate with the path, The maintenance operation status information indicating the maintenance operation status for each path for all the paths constituting the plurality of access lines is stored in advance, and the maintenance operation status information corresponding to the path notified from the control unit is referred to The state management unit that determines whether the path can be maintained for the path, and has restriction state information that indicates a state of communication restriction for the path for each of the paths that constitute the plurality of access lines in advance. One or more state management units that refer to the restriction state information corresponding to the path notified from the control unit and determine whether the communication is restricted for the path. The control unit notifies each of the two or more state management units of one path indicated by the configuration information and obtains a determination result for all the paths indicated by the configuration information, When a positive determination result is obtained in all the steps from all of the two or more state management units, the signal transmission / reception unit controls to transmit permission to the terminal device, whereas in any step, negative When a specific determination result is obtained, the signal transmission / reception unit controls to transmit a non-permission to the terminal device.

  According to a first bandwidth management method of the present invention, a bandwidth management device that transmits permission or non-permission for a request transmitted from the terminal device to obtain permission to use an access line terminated by the terminal device A bandwidth management method executed when permission or non-permission is transmitted, wherein the signal transmission / reception unit provided in the bandwidth management device includes configuration information indicating one or more paths constituting the access line And a control unit provided in the band management device for controlling the signal transmission / reception unit to transmit permission or non-permission to the request to the terminal device, and the band management device. The bandwidth state information indicating the amount of bandwidth allocated to each path for all paths that constitute a plurality of access lines including the access line in advance. A state management unit having a step of referring to the bandwidth state information corresponding to all paths indicated by the configuration information to determine whether or not there is a bandwidth available for all the paths. All paths indicated by the configuration information are provided in the apparatus, and a state management unit having apparatus state information indicating the state of the apparatus that should be responsible for communication of each path for all paths that configure the plurality of access lines in advance. A step of determining whether or not the device can perform communication for all the paths with reference to the device status information corresponding to the above, provided for the bandwidth management device, and for each path for all the paths constituting the plurality of access lines in advance The maintenance management status information having maintenance operation status information indicating the status of maintenance operation for the path is stored in the maintenance operation status information corresponding to all paths indicated by the configuration information. The step of determining whether maintenance operation is possible for all the paths, provided in the bandwidth management device, and for all paths constituting the plurality of access lines in advance, for each path, the communication restriction status for the paths is determined. One of steps in which the state management unit having the restriction state information indicates whether or not communication restriction is made for all the paths with reference to the restriction state information corresponding to all the paths indicated by the configuration information. The control unit, when obtaining a positive determination result from all of the two or more state management units, while controlling the signal transmission and reception unit to transmit permission to the terminal device, When a negative determination result is obtained from any state management unit, the signal transmission / reception unit performs control so as to transmit a non-permission to the terminal device.

  According to a second bandwidth management method of the present invention, a bandwidth management device that transmits permission or non-permission for a request transmitted from the terminal device to obtain permission to use an access line terminated by the terminal device A bandwidth management method executed when permission or non-permission is transmitted, wherein the signal transmission / reception unit provided in the bandwidth management device includes configuration information indicating one or more paths constituting the access line And a control unit provided in the band management device for controlling the signal transmission / reception unit to transmit permission or non-permission to the request to the terminal device, and the band management device. The bandwidth state information indicating the amount of bandwidth allocated to each path for all paths that constitute a plurality of access lines including the access line in advance. A state management unit having a step of referring to the bandwidth state information corresponding to all paths indicated by the configuration information to determine whether or not there is a bandwidth available for all the paths. All paths indicated by the configuration information are provided in the apparatus, and a state management unit having apparatus state information indicating the state of the apparatus that should be responsible for communication of each path for all paths that configure the plurality of access lines in advance. A step of determining whether or not the device can perform communication for all the paths with reference to the device status information corresponding to the above, provided for the bandwidth management device, and for each path for all the paths constituting the plurality of access lines in advance The maintenance management status information having maintenance operation status information indicating the status of maintenance operation for the path is stored in the maintenance operation status information corresponding to all paths indicated by the configuration information. The step of determining whether maintenance operation is possible for all the paths, provided in the bandwidth management device, and for all paths constituting the plurality of access lines in advance, for each path, the communication restriction status for the paths is determined. One of steps in which the state management unit having the restriction state information indicates whether or not communication restriction is made for all the paths with reference to the restriction state information corresponding to all the paths indicated by the configuration information. The control unit notifies each of the two or more state management units of one path indicated by the configuration information and obtains a determination result, and all the paths indicated by the configuration information When the positive determination result is obtained in all the steps from all of the two or more state management units, the signal transmission / reception unit transmits permission to the terminal device. On the other hand, when a negative determination result is obtained in any step, the signal transmission / reception unit performs control so as to transmit a non-permission to the terminal device.

  According to the present invention, it is possible to provide a bandwidth management apparatus and a bandwidth management method that can perform bandwidth management reflecting the state of a network.

It is a connection diagram which shows the structure of the communication system containing the band management apparatus which concerns on this Embodiment. 1 is a diagram illustrating a configuration example of an access network 1. FIG. It is a block diagram which shows schematic structure of SSC4. FIG. 3 is a diagram showing band status information, device status information, maintenance operation status information, and regulation status information when the access network 1 has the configuration illustrated in FIG. 2. Bandwidth status information, device status information, maintenance operation status information, and regulatory status information It is a sequence diagram for demonstrating operation | movement of a communication system. It is a flowchart which shows the operation | movement by one operation mode of SSC4. It is a flowchart which shows the operation | movement by the other operation mode of SSC4.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a connection diagram showing a configuration of a communication system including a bandwidth management apparatus according to the present embodiment. The communication system includes an access network 1, an ONU (Optical Network Unit) 2, an SSE (Subscriber Service Edge) 3, an SSC (Subscriber Session Control Server) 4 that is a bandwidth management device, a network device 6, and a core device 5. Have

  ONU 2 and SSE 3 are connected to access network 1, SSE 3 is further connected to core network 6, SSC 4 is connected to SSE 3, and terminal device 5 is connected to ONU 2.

  The access network 1 is an IP network for connecting the terminal device 5 to the SSE 3. The core network 6 is an IP network for connecting SSEs and higher-level routers of SSE3. The ONU 2 is a terminating device for the optical line access network. The SSE 3 is a router that transmits and receives packets to and from the terminal device 5. The SSC 4 is a server including a session control function that accommodates subscribers. The terminal device 5 is a terminal device operated by a user. There may be more ONUs 2 and terminal devices 5.

  In the communication system, another network connected via the terminal device 5 or the core network 6 transmits a request to the SSC 4 to use the access line in the access network 1. The SSC 4 uses the information reflecting the state of the access network 1 to determine whether or not the request can be permitted. If the request can be permitted, the SSC 4 outputs a predetermined signal (referred to as permission), and if not, the signal (referred to as non-permission). The data is transmitted to another network via the terminal device 5 or the core network 6. When the permission is transmitted, the terminal device 5 or another network performs communication using the access line. On the other hand, when the non-permission is transmitted, the terminal device 5 or another network does not use the access line and does not perform communication.

  FIG. 2 is a diagram illustrating a configuration example of the access network 1.

  Access network 1 includes access lines # 1, # 2 and # 3.

  The access line # 1 is connected from the ONU 2 to an SSE (SBC: Session Border Controller function) 3 via an OLT (Optical Line Terminal) 11 and an L2SW (Layer 2 Switch) 12. The access line # 1 includes a path 101 between the ONU 2 and the OLT 11, a path 102 between the OLT 11 and the L2SW 12, a path 103 between the L2SW 12 and the SSE 3, and a path (not shown) inside the SSE 3 (not shown). Composed. A path is also called a link or a physical link. Further, it is assumed that the same identification information (referred to as a path ID) as the code indicating the path (such as “101” in the path 101) is given to the path.

  The access line # 2 is connected from the ONU 2 to the SSE (SBC function) 3 via the L2SW 12. The access line # 2 includes a path 201, a path 103, and a path 104 between the ONU 2 and the L2SW 12.

  The access line # 3 is directly connected from the ONU 2 to the SSE (SBC function) 3. The access line # 3 includes a path 301 and a path 104 between the ONU 2 and the SSE3.

  FIG. 3 is a block diagram showing a schematic configuration of the SSC 4.

  The SSC 4 includes a CSCF (Call Session Control Function) 41, a NASA (Network Attachment Subsystem) 42, and a RACS (Resource and Admission Control System) 43.

  The CSCF 41 has a function of controlling a SIP (Session Initiation Protocol) session. The NASS 42 has a function of managing subscriber information.

  The RACS 43 has a function of managing a network bandwidth, and includes a signal transmission / reception unit 431, a control unit 432, four state management units, that is, a resource management unit 433, a device state management unit 434, a maintenance operation state management unit 435, and a regulation state management. Part 436.

  The signal transmission / reception unit 431 has a function of transmitting / receiving a signal to / from the CSCF 41 or the like.

  The control unit 432 has a function of controlling the operation of the RACS 43.

  The resource management unit 433 manages bandwidth state information on a path basis, cooperates with a function for allocating bandwidth to a path and an operation system, reflects and manages bandwidth information transmitted from the operation system, and manages bandwidth information if necessary. It has a function to transmit to the operation system.

  The device status management unit 434 accumulates device status information transmitted from the SSE 3 in units of paths, cooperates with the management function and the operation system, reflects and manages the device status transmitted from the operation system, and if necessary It has a function of transmitting device status information to the operation system.

  The maintenance operation state management unit 435 cooperates with an operation system (not shown) that is a system for the maintenance operator to control each device, accumulates maintenance operation state information transmitted from the operation system in units of paths, Has the function to manage.

  The regulation state management unit 436 has a function of linking and managing regulation state information transmitted from the operation system in units of paths in cooperation with the operation system, and transmitting regulation state information to the operation system if necessary.

  FIG. 4 is a diagram showing band state information, device state information, maintenance operation state information, and restriction state information when the access network 1 has the configuration illustrated in FIG. FIG. 4 shows the band status information, device status information, maintenance operation status information, and regulation status information divided into the resource management unit 433, the device status management unit 434, the maintenance operation status management unit 435, and the regulation status management unit 436 for convenience. It summarizes and shows.

  The resource management unit 433 has bandwidth state information indicating the amount of bandwidth allocated to each path for all paths. Each band state information is associated with the path ID of the corresponding path. The amount of bandwidth is, for example, a numerical value. Although not shown, the resource management unit 433 stores a maximum value and limits the amount of bandwidth to the maximum value or less.

  The device state management unit 434 has device state information indicating the state of the device that should be responsible for communication of each path for all paths. Each device status information is associated with a path ID of a corresponding path.

  The maintenance operation status management unit 435 has maintenance operation status information indicating the maintenance operation status for each path for all paths. Each maintenance operation status information is associated with a path ID of a corresponding path.

  The restriction state management unit 436 has restriction state information indicating the state of communication restriction for each path for all paths. Each restriction state information is associated with a path ID of a corresponding path.

  FIG. 5A is a diagram showing values and meanings that each apparatus status information can have. The apparatus status information may have one of a value indicating the word “INS (abbreviation of IN Service)” and a value indicating the word “OUS (abbreviation of OUt of Service)”. Hereinafter, “the device identification information may have one of“ INS ”and“ OUS ”. The description of values is simplified as follows. The value changes according to the device state. “INS” indicates that the apparatus can perform communication. “OUS” indicates that the apparatus cannot communicate. When the device is being initialized or is in failure, the device status information is “OUS”.

  FIG. 5B is a diagram showing values and meanings that each maintenance operation status information can have. The maintenance operation status information may have any one of “blockage release”, “maintenance block (pre-block)”, and “maintenance block”. “Maintenance block” does not transition to “maintenance block (pre-block)”, but otherwise, the value transitions according to the state of maintenance operation. “Closing release” indicates a state in which communication is possible in maintenance operation. “Maintenance block (pre-block)” indicates a state in which a call during a call is continued in a state where communication is not possible in maintenance operation. “Maintenance block” indicates a state in which communication is not possible in maintenance operation and there is no call during a call.

  FIG.5 (c) is a figure which shows the value and meaning which each regulation state information can have. The restriction state information may have any one of “restriction release”, “restriction block (pre-block)”, and “restriction block”. “Regulated blockage” does not transition to “regulated blockage (pre-blocking)”, but otherwise, the value transitions according to the state of regulation. “Release restriction” indicates a state where communication is permitted according to the rules. “Regulated block (pre-block)” indicates a state in which communication is not permitted (restricted) according to the rules and the call during a call is continued. “Restricted block” indicates a state in which communication is restricted by rule and there is no call during a call.

  Next, the operation of the communication system will be described.

  FIG. 6 is a sequence diagram illustrating an operation from when the terminal device 5 transmits a request for obtaining permission to use the access line to when permission or non-permission for the request is transmitted to the terminal device 5.

  First, the terminal device 5 transmits a signal (hereinafter referred to as “request”) to the SSE 3 to obtain permission to use the access line (S1). The request includes configuration information including the path IDs of all paths that constitute the target access line. SSE3 transmits a request to SSC4, which SSC4 receives (S3).

  FIG. 7 is a flowchart showing an operation in one operation mode of the SSC 4. The SSC 4 has two operation modes, and FIG. 7 is based on one of them.

  The signal transmission / reception unit 431 receives the request and transfers the request to the control unit 432. (S101). The control unit 432 activates the device state management unit 434, extracts configuration information from the request, and provides the device state management unit 434 with the configuration information.

  The device state management unit 434 extracts one path ID from the configuration information, refers to the corresponding device state information, and determines whether the device state information has “INS” (S201). If the device status information has “OUS”, the device status management unit 434 notifies the control unit 432 that any of the device status information has “OUS”, and the process proceeds to step S602. . On the other hand, if the device status information has “INS”, the device status management unit 434 determines whether all path IDs have been extracted from the configuration information (S202). If the path ID remains (NO), the process returns to step S201.

  When all path IDs are extracted from the configuration information (YES), the device state management unit 434 notifies the control unit 432 that the corresponding all device state information has “INS”. The control unit 432 activates the maintenance operation state management unit 435 and provides configuration information.

  The maintenance operation state management unit 435 extracts one path ID from the configuration information, refers to the corresponding maintenance operation state information, and determines whether the maintenance operation state information has “blocking release” (S301). When the maintenance operation state information has “maintenance block (pre-block)” or “maintenance block”, the maintenance operation state management unit 435 notifies the control unit 432 that any maintenance operation state information is “maintenance block (pre-block)”. (Blocking) ”or“ maintenance block ”, and the process proceeds to step S602. On the other hand, when the maintenance operation status information has “blocking release”, the maintenance operation status management unit 435 determines whether all path IDs have been extracted from the configuration information (S302). If the path ID remains (NO), the process returns to step S301.

  When all path IDs are extracted from the configuration information (YES), the maintenance operation state management unit 435 notifies the control unit 432 that the corresponding all maintenance operation state information includes “blocking release”. The control unit 432 activates the restriction state management unit 436 and provides configuration information.

  The restriction state management unit 436 extracts one path ID from the configuration information, refers to the corresponding restriction state information, and determines whether the restriction state information has “restriction release” (S401). When the restriction state information includes “restriction blockage (pre-blocking)” or “restriction blockage”, the restriction state management unit 436 notifies the control unit 432 that one of the restriction state information is “restriction blockage (pre-blocking)”. ”Or“ regulation blockage ”, the process proceeds to step S602. On the other hand, when the restriction state information includes “restriction release”, the restriction state management unit 436 determines whether all path IDs have been extracted from the configuration information (S402). If the path ID remains (NO), the process returns to step S401.

  When all path IDs are extracted from the configuration information (YES), the regulation state management unit 436 notifies the control unit 432 that the corresponding all regulation state information has “restriction release”. The control unit 432 activates the resource management unit 433 and provides configuration information.

The resource management unit 433 extracts one path ID from the configuration information, refers to the corresponding band state information, and determines whether there is a vacancy that is equal to or less than the maximum value even if a predetermined value of the band value is added. (S501). If there is no available bandwidth, the resource management unit 433 notifies the control unit 432 that there is no available bandwidth, and the process proceeds to step S602. On the other hand, if there is an available bandwidth, the resource management unit 433 determines whether all path IDs have been extracted from the configuration information (S502). If the path ID remains (NO), the process returns to step S501.
When all path IDs are extracted from the configuration information (YES), the resource management unit 433 notifies the control unit 432 that there is a free bandwidth. The control unit 432 controls the signal transmission / reception unit 431 to transmit permission addressed to the terminal device (S601).

  In step S602, the control unit 432 controls the signal transmission / reception unit 431 to transmit a non-permission addressed to the terminal device.

  In FIG. 6, SSC4 transmits permission to SSE3 (S21). SSE3 transmits permission to the terminal device 5 (S23). When the permission is thus received, the terminal device 5 performs communication using the access line. On the other hand, the SSC 4 transmits a disapproval to the SSE 3 (S31). The SSE 3 transmits a disapproval to the terminal device 5 (S33). When the non-permission is received in this way, the terminal device 5 does not use the access line and does not perform communication.

  FIG. 8 is a flowchart showing the operation in the other operation mode of the SSC 4.

  The signal transmission / reception unit 431 receives the request and transfers the request to the control unit 432. (S111). The control unit 432 activates the device state management unit 434, extracts configuration information from the request, extracts one path ID from the configuration information, and provides the device state management unit 434 with it.

  The device state management unit 434 refers to the device state information corresponding to the path ID and determines whether the device state information has “INS” (S211). When the device state information has “OUS”, the device state management unit 434 notifies the control unit 432 that the device state information has “OUS”, and the process proceeds to step S712. On the other hand, when the device status information has “INS”, the device status management unit 434 notifies the control unit 432 that the corresponding device status information has “INS”. The control unit 432 activates the maintenance operation state management unit 435 and gives the same path ID.

  The maintenance operation state management unit 435 refers to the maintenance operation state information corresponding to the path ID, and determines whether the maintenance operation state information has “blocking release” (S311). When the maintenance operation state information has “maintenance block (pre-block)” or “maintenance block”, the maintenance operation state management unit 435 notifies the control unit 432 that the maintenance operation state information is “maintenance block (pre-block)”. ”Or“ Maintenance block ”, and the process proceeds to step S712. On the other hand, when the maintenance operation status information includes “block release”, the maintenance operation status management unit 435 notifies the control unit 432 that the corresponding maintenance operation status information includes “block release”. To do. The control unit 432 activates the restriction state management unit 436 and gives the same path ID.

  The restriction state management unit 436 refers to the restriction state information corresponding to the path ID, and determines whether the restriction state information has “restriction release” (S411). When the restriction state information has “restriction block (pre-block)” or “restriction block”, the restriction state management unit 436 notifies the control unit 432 that the restriction state information is “restriction block (pre-block)” or “ It is notified that “regulation blockage” is held, and the process proceeds to step S712. On the other hand, when the restriction state information has “restriction release”, the restriction state management unit 436 notifies the control unit 432 that the corresponding restriction state information has “restriction release”. The control unit 432 activates the resource management unit 433 and gives the same path ID.

The resource management unit 433 refers to the band state information corresponding to the path ID, and determines whether there is a vacancy that is equal to or less than the maximum value even if a predetermined value of the band value is added (S511). If there is no available bandwidth, the resource management unit 433 notifies the control unit 432 that there is no available bandwidth, and the process proceeds to step S712. On the other hand, if there is an available bandwidth, the control unit 432 determines whether all path IDs have been extracted from the configuration information (S611). If the path ID remains (NO), the process returns to step S211.
When all path IDs are extracted from the configuration information (YES), the control unit 432 controls the signal transmitting / receiving unit 431 to transmit permission addressed to the terminal device (S711).

  In step S712, the control unit 432 controls the signal transmission / reception unit 431 to transmit a non-permission addressed to the terminal device.

  In the present embodiment, the SSC 4 includes the resource management unit 433, the device state management unit 434, and the maintenance operation state management unit 435. However, the SSC 4 includes one or more of these. Also good. Further, the SSC 4 may have only one of the two operation modes.

  For example, in the case of having the operation mode described with reference to FIG. 7, the SSC 4 (hereinafter referred to as “bandwidth management device”) includes configuration information indicating one or more paths constituting an access line terminated by the terminal device, and The signal transmission / reception unit 431 that receives a request transmitted from the terminal device to obtain permission to use the access line, and the signal transmission / reception unit 431 controls the transmission / reception to be transmitted to the terminal device. The control unit 432 and all the paths that have a plurality of access lines including the access line in advance have band state information indicating the amount of bandwidth allocated to the path for each path, and are indicated by the configuration information Resource management unit 433 that determines whether or not there is free bandwidth for all the paths with reference to the bandwidth status information corresponding to Status management unit "), and for all paths that constitute the plurality of access lines in advance, each path has device status information that indicates the status of the device that should be responsible for communication of the path, and is indicated by the configuration information. A device status management unit 434 (hereinafter simply referred to as “status management unit”) that determines whether the device can communicate with each other with reference to the device status information corresponding to the path, and configures the plurality of access lines in advance. Maintenance operation status information indicating the status of maintenance operation for the path for each path, and maintenance operation status information corresponding to all paths indicated by the configuration information is referred to, A maintenance operation state management unit 435 (hereinafter simply referred to as a “state management unit”) that determines whether or not it is possible, for all the paths that constitute the plurality of access lines in advance for each path. A restriction state management unit 436 that has restriction state information indicating a state of communication restriction and determines whether communication restriction is made for all paths by referring to restriction state information corresponding to all paths indicated by the configuration information. (Hereinafter simply referred to as “state management unit”), and when the control unit 432 obtains a positive determination result from all of the two or more state management units, the signal transmission / reception unit 431 While controlling to transmit permission to the terminal device, when a negative determination result is obtained from any state management unit, the signal transmitting / receiving unit 431 controls to transmit non-permission to the terminal device.

  Therefore, if a negative determination result is obtained from any of the state management units, a disapproval is transmitted to the terminal device, for example, the device has failed despite the permission being transmitted, Inconveniences such as inability to actually perform communication can be avoided.

  On the other hand, for example, in the case of having the operation mode described with reference to FIG. 8, the bandwidth management device includes configuration information indicating one or more paths that constitute an access line terminated by the terminal device and uses the access line A signal transmission / reception unit 431 that receives a request transmitted from the terminal device to obtain permission, a control unit 432 that controls the signal transmission / reception unit 431 to transmit permission or non-permission to the request to the terminal device, Band status information indicating the amount of bandwidth allocated to each path for all paths constituting a plurality of access lines including the access line, and corresponding to all paths indicated by the configuration information And a state management unit (433) for determining whether or not there is free bandwidth for all the paths, and the plurality of access routers in advance. Device status information indicating the status of the device that should be responsible for communication for each path for all paths constituting the network, and by referring to the device status information corresponding to the path notified from the control unit 432, the path The apparatus status management unit (434) for determining whether the apparatus can communicate with each other has maintenance operation status information indicating the maintenance operation status for each path for all paths constituting the plurality of access lines in advance. , Referring to the maintenance operation status information corresponding to the path notified from the control unit 432, a status management unit (435) for determining whether the path can be maintained, and all paths constituting the plurality of access lines in advance For each path, it has restriction state information indicating the state of communication restriction for the path, and refers to the restriction state information corresponding to the path notified from the control unit 432, The path includes one or more state management units (436) that determine whether communication is not restricted, and the control unit 432 is indicated by configuration information in each of the two or more state management units. The step of notifying one path and obtaining the determination result is performed for all paths indicated by the configuration information, and when a positive determination result is obtained in all steps from all of the two or more state management units, signal transmission / reception is performed. The unit 431 controls to transmit the permission to the terminal device. On the other hand, if a negative determination result is obtained in any step, the signal transmission / reception unit 431 controls to transmit the non-permission to the terminal device.

  Therefore, if a negative determination result is obtained in any step, a non-permission is transmitted to the terminal device. Can avoid the inconvenience that communication cannot be performed.

  Note that a computer program for causing a computer to function as the SSC 4 is stored in a computer-readable recording medium such as a semiconductor memory, a magnetic disk, an optical disk, a magneto-optical disk, or a magnetic tape, and distributed for display or the like. The program may be transmitted via a communication network such as the Internet.

1 ... Access network 2 ... ONU
3 ... SSE
4 ... SSC
5 ... Terminal device 11 ... OLT
41 ... CSCF
42 ... NASS
43 ... RACS
101, 102, 103, 104, 201, 301 ... path 431 ... signal transmission / reception unit 432 ... control unit 433 ... resource management unit 434 ... device state management unit 435 ... maintenance operation state management unit 436 ... restriction state management unit

Claims (6)

A signal transmission / reception unit that includes configuration information indicating one or more paths constituting an access line terminated by a terminal device and receives a request transmitted from the terminal device to obtain permission to use the access line;
A control unit that controls the signal transmitting / receiving unit to transmit permission or non-permission to the terminal device in response to the request;
Band state information indicating the amount of bandwidth allocated to each path for all paths that constitute a plurality of access lines including the access line in advance, and corresponding to all paths indicated by the configuration information With reference to the bandwidth status information, a status management unit that determines whether there is a bandwidth available for all the paths,
Preliminarily having device state information indicating the state of a device that should be responsible for communication of each path for all paths constituting the plurality of access lines, and the device state information corresponding to all paths indicated by the configuration information Referring to all the paths, a state management unit that determines whether the device can perform communication,
Preliminary maintenance operation status information indicating the status of maintenance operation for each path for all paths constituting the plurality of access lines is stored, and the maintenance operation status information corresponding to all paths indicated by the configuration information is referred to. A status management unit that determines whether maintenance operation is possible for all the paths,
For all paths that constitute the plurality of access lines in advance, each path has restriction state information that indicates a state of communication restriction for the path, and refers to the restriction state information corresponding to all the paths indicated by the configuration information , A state management unit that determines whether communication is restricted for all the paths,
One or more of
The controller is
When a positive determination result is obtained from all of the two or more state management units, the signal transmission / reception unit controls the permission to be transmitted to the terminal device, while one of the state management units is negative. When the determination result is obtained, the signal transmitting / receiving unit is controlled to transmit a non-permission to the terminal device.
A bandwidth management apparatus characterized by that. A signal transmission / reception unit that includes configuration information indicating one or more paths constituting an access line terminated by a terminal device and receives a request transmitted from the terminal device to obtain permission to use the access line;
A control unit that controls the signal transmitting / receiving unit to transmit permission or non-permission to the terminal device in response to the request;
The bandwidth state information indicating the amount of bandwidth allocated to each path for all the paths constituting a plurality of access lines including the access line in advance, and corresponding to the path notified from the control unit A state management unit that refers to the bandwidth state information and determines whether there is a bandwidth available for the path,
The apparatus state information indicating the state of the apparatus that should be responsible for communication of each path for all paths constituting the plurality of access lines in advance, and the apparatus state information corresponding to the path notified from the control unit Referring to the state management unit for determining whether the device can communicate with the path,
The maintenance operation status information indicating the maintenance operation status for each path for all the paths constituting the plurality of access lines is stored in advance, and the maintenance operation status information corresponding to the path notified from the control unit is referred to A status management unit for determining whether the maintenance operation is possible for the path,
For all paths that constitute the plurality of access lines in advance, each path has restriction state information indicating a state of communication restriction for the path, and refers to the restriction state information corresponding to the path notified from the control unit , A state management unit that determines whether communication is restricted for the path,
One or more of
The controller is
A step of notifying each of the two or more state management units of one path indicated by the configuration information and obtaining a determination result is performed for all the paths indicated by the configuration information, and the two or more state management units When a positive determination result is obtained in all the steps from all of the units, the signal transmitting / receiving unit is controlled to transmit permission to the terminal device, while a negative determination result is obtained in any step In this case, the signal transmitting / receiving unit is controlled to transmit a non-permission to the terminal device.
A bandwidth management apparatus characterized by that. This is executed when a bandwidth management device that transmits permission or non-permission for a request transmitted from the terminal device to obtain permission to use an access line terminated by the terminal device transmits the permission or non-permission. A bandwidth management method,
A signal transmission / reception unit provided in the band management device receiving the request including configuration information indicating one or more paths configuring the access line;
A step of controlling the control unit provided in the band management device so that the signal transmitting / receiving unit transmits permission or non-permission to the request to the terminal device;
A state management unit that is provided in the bandwidth management device and has bandwidth state information indicating the amount of bandwidth allocated to each path for all paths that constitute a plurality of access lines including the access line in advance, With reference to the bandwidth state information corresponding to all paths indicated by the configuration information, and determining whether there is a bandwidth available for all the paths,
A state management unit that is provided in the bandwidth management device and has device state information that indicates the state of a device that should be responsible for communication of each path for all paths that configure the plurality of access lines in advance is indicated by the configuration information. A step of determining whether the device can perform communication with respect to all the paths with reference to the device state information corresponding to all the paths
A state management unit that is provided in the bandwidth management device and has maintenance operation status information indicating a maintenance operation status for each path for all paths that configure the plurality of access lines in advance is indicated by the configuration information. A step of referring to the maintenance operation status information corresponding to a path and determining whether maintenance operation is possible for all the paths;
A state management unit that is provided in the bandwidth management apparatus and has restriction state information that indicates a state of communication restriction for each path for all the paths that configure the plurality of access lines in advance. A step of determining whether or not communication restriction is made for all the paths with reference to the restriction state information corresponding to
One or more of
The controller is
When a positive determination result is obtained from all of the two or more state management units, the signal transmission / reception unit controls the permission to be transmitted to the terminal device, while one of the state management units is negative. When the determination result is obtained, the signal transmitting / receiving unit is controlled to transmit a non-permission to the terminal device.
A bandwidth management method characterized by the above. This is executed when a bandwidth management device that transmits permission or non-permission for a request transmitted from the terminal device to obtain permission to use an access line terminated by the terminal device transmits the permission or non-permission. A bandwidth management method,
A signal transmission / reception unit provided in the band management device receiving the request including configuration information indicating one or more paths configuring the access line;
A step of controlling the control unit provided in the band management device so that the signal transmitting / receiving unit transmits permission or non-permission to the request to the terminal device;
A state management unit that is provided in the bandwidth management device and has bandwidth state information indicating the amount of bandwidth allocated to each path for all paths that constitute a plurality of access lines including the access line in advance, With reference to the bandwidth state information corresponding to all paths indicated by the configuration information, and determining whether there is a bandwidth available for all the paths,
A state management unit that is provided in the bandwidth management device and has device state information that indicates the state of a device that should be responsible for communication of each path for all paths that configure the plurality of access lines in advance is indicated by the configuration information. A step of determining whether the device can perform communication with respect to all the paths with reference to the device state information corresponding to all the paths
A state management unit that is provided in the bandwidth management device and has maintenance operation status information indicating a maintenance operation status for each path for all paths that configure the plurality of access lines in advance is indicated by the configuration information. A step of referring to the maintenance operation status information corresponding to a path and determining whether maintenance operation is possible for all the paths;
A state management unit that is provided in the bandwidth management apparatus and has restriction state information that indicates a state of communication restriction for each path for all the paths that configure the plurality of access lines in advance. A step of determining whether or not communication restriction is made for all the paths with reference to the restriction state information corresponding to
One or more of
The controller is
A step of notifying each of the two or more state management units of one path indicated by the configuration information and obtaining a determination result is performed for all the paths indicated by the configuration information, and the two or more state management units When a positive determination result is obtained in all the steps from all of the units, the signal transmitting / receiving unit is controlled to transmit permission to the terminal device, while a negative determination result is obtained in any step In this case, the signal transmitting / receiving unit is controlled to transmit a non-permission to the terminal device.
A bandwidth management method characterized by the above.   A computer program for causing a computer to function as the bandwidth management device according to claim 1.   A computer-readable recording medium on which the computer program according to claim 5 is recorded.

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