JP2009124629A - Band management system and method, and access device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that it is impossible to prevent the effect due to wrong traffic between a user terminal and an edge rooter (access zone) in a conventional method, because band control is carried out in an entrance of network. <P>SOLUTION: In a band management system, a band control point is provided also to an access zone by mounting an output band control function such as a rate limit on access devices (ONU31, OLT32, concentration SW33) closer to a terminal 30 side than an edge rooter 34. A band management server 35 and a special band management server 38 set a value of each rate limit to each access device to prevent a traffic over an acceptance band from flowing into an access zone. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a technique for managing communication quality of a communication network, and more particularly to a technique suitable for efficiently performing user bandwidth management in an IP (Internet Protocol) network.

  As IP networks such as the Internet have become wider, there are more opportunities for users to send and receive large amounts of data at once. However, if such a large volume of traffic flows simultaneously, packet loss or delay may occur.

  In particular, traffic requiring a large bandwidth often has low resistance to loss and delay, and if the traffic flows without limit, it is likely that most users cannot properly transmit and receive data.

  It is also assumed that unauthorized traffic flows into the network due to user misrepresentation or equipment failure, and other traffic is compressed.

  One way to prevent such failures is to build a bandwidth management network that manages the bandwidth for each user in the network and performs admission control so that the total amount of traffic does not exceed the network limit. It has been implemented. Hereinafter, an example of such a bandwidth management network will be described with reference to FIG.

  FIG. 1 is a block diagram illustrating a configuration example of a conventional bandwidth management network, and illustrates a core network 17 as an example. The core network is a large-capacity backbone communication line that connects telecommunications carriers. For example, a line that connects connection bases in an Internet service provider, a provider and another provider, or IX (interoperator interconnection) Point).

  In FIG. 1, reference numeral 11 denotes a user terminal (described as “terminal” in the figure), and reference numeral 12 denotes an access device including a VDSL (Very high-bit-rate Digital Subscriber Line), a media converter, a PON (Passive Optical Network) system, and the like. . The media converter performs optical / electrical interface conversion.

  Reference numeral 13 denotes a line concentrator switch (described as “line concentrator SW” in the figure) that is connected to an upper level of the access apparatus 12 and collects a plurality of access apparatuses 12, and 14 is an edge router adjacent to the core network 17 (“ Edge Router ”), 15 is a bandwidth management server that manages the bandwidth for each user, 16 accepts a call connection request from the user, and permits or rejects the user's call connection according to the instructions of the bandwidth management server Call connection server.

  Here, the user terminal 11 to the edge router 14 is referred to as an access section, the edge router 14 to the core network 17 is referred to as a network section, and the bandwidth management server 15 and the call connection server 16 are referred to as a server section.

  In order to realize a bandwidth management network, it is determined whether or not the transmitted packet is a packet for which call connection permission has been received so that unauthorized traffic does not impose on the network. Such a point is called a “bandwidth control point”.

  When managing a band in a band management network, conventionally, the edge router 14 between the access section and the network section is used as a band control point, and band control is performed in units of flows. The bandwidth management operation at that time will be described with reference to FIG.

  FIG. 2 is a flowchart showing an example of bandwidth management processing operation in the conventional bandwidth management network in FIG. The bandwidth management server 15 includes a management table. In this management table, IP addresses of all user terminals including the user terminals 11 connected to the core network 17 and edge routers in which the user terminals (11) are accommodated. The IP address of (14) is held (step S201).

  When the user terminal 11 as a certain user terminal intends to transmit and receive data, the user terminal 11 requests the call connection server 16 for call connection (step S202). When the call connection server 16 receives the request, the call connection server 16 informs the bandwidth management server 15 of the start point IP address, the end point IP address, the start point port number, the end point port number, and the protocol of the requested data, and confirms the available bandwidth. (Step S203).

  Based on the information from the call connection server 16, the bandwidth management server 15 calculates the bandwidth required by the flow, compares the currently accepted traffic amount with the network capacity, and calculates whether there is an available bandwidth. (Step S204).

  If there is no available bandwidth (step S205), the bandwidth management server 15 notifies the call connection server 16 of the lack of bandwidth (step S206), and the bandwidth reception server 16 that has received this notification calls connection of the user terminal 11 Reject the request.

  If the bandwidth is available (step S205), the bandwidth management server 15 sends the requested flow from the user terminal 11 to the edge router 14 in which the user terminal 11 is accommodated. An instruction to transmit is given (step S208). The edge router 14 does not transmit the flow beyond the bandwidth determined in advance by the rate limiter or the shaper function.

  In addition to instructing the edge router 14, the bandwidth management server 15 notifies the call connection server 16 that the bandwidth is available (step S209). Upon receiving this notification, the call connection server 16 receives the user terminal. 11 is permitted (step S210).

  Thereafter, when the call connection server 16 receives a transmission / reception end notification from the user terminal 11, the bandwidth management server 15 instructs the edge router 14 to restore the setting (step S211). That is, the flow from the user terminal 11 is not transmitted as it is.

  As described above, the edge router 14 transmits only the flow instructed from the bandwidth management server 15 for the traffic for which bandwidth management is performed. Even if the user terminal 11 transmits data without call connection, the edge router 14 is discarded or remarked to best effort, so that unauthorized traffic does not press the core network 17.

  However, with this technology, although unauthorized traffic can be prevented from squeezing the core network 17, it is transferred to the edge router 14 without restriction, and therefore, in the access section (user terminal-access device-concentrator switch-edge router). The impact of unauthorized traffic cannot be prevented.

  Other conventional techniques for performing bandwidth control in the router at the entrance of the network are described in Patent Documents 1 and 2, for example.

JP 2004-260285 A JP 2004-320489 A

  The problem to be solved is that in the conventional technology, bandwidth control is performed at the entrance of the network, and it is impossible to prevent the influence of unauthorized traffic between the user terminal and the edge router (access section).

  An object of the present invention is to solve these problems of the prior art and enable efficient communication control in all sections of a network including an access section.

  In order to achieve the above object, in the present invention, a bandwidth control point is provided in the access section by implementing a rate limiter or shaper function in an access device (VDSL, PON, etc.) provided on the terminal side from the edge router. The bandwidth management server sets a rate limit or shaping value for the access device so that traffic exceeding the accepted bandwidth does not flow into the access section.

  According to the present invention, (1) by providing a bandwidth control point in the access device separately from the edge router of the prior art, traffic exceeding the bandwidth permitted for call connection flows in the access section, and other users' It is possible to prevent the traffic from being affected. In addition, (2) by synchronizing the rate limit grasped by the bandwidth management server and the rate limit of the actual access device, it is possible to eliminate the deviation of the set value due to the loss of the control packet. In addition, (3) by providing a dedicated bandwidth management server for the access device, it is possible to reduce the load on the bandwidth management server in the server section.

  The best mode for carrying out the present invention will be described below with reference to the drawings. FIG. 3 is a block diagram showing a configuration example of a network provided with a user bandwidth management system according to the present invention. In this example, an E-PON (Ethernet (registered trademark) -Passive Optical Network) system is used as an access device. Use. The E-PON system includes an OLT (Optical Line Terminal) of an in-station device and an ONU (Optical Network Unit) of a home device, and the setting of each ONU can be changed from the OLT that accommodates the ONU.

  In FIG. 3, 30 is a user terminal (denoted as “terminal” in the figure), 31 is an ONU that constitutes an E-PON system as an access device and is installed in a home, and 32 is an E-PON system as an access device. OLT 33 that is installed in the station and accommodates each ONU, 33 is connected to a higher level of the OLT 32, and is a concentrator switch (referred to as “concentrator SW” in the figure) for concentrating a plurality of E-PON systems, and 34 is a core An edge router adjacent to the network 37 (described as “Edge Router” in the figure), 35 a bandwidth management server that controls and manages the bandwidth for each user, and 36 receives a call connection request from the user, and receives the bandwidth connection server 35 Is a call connection server that permits or rejects the call connection of the user terminal 30 in accordance with the instructions of, and 38 performs bandwidth control in the E-PON system. Access is a dedicated bandwidth management server.

  Each of the user terminal, the bandwidth management server 35, and the access dedicated bandwidth management server 38 has a computer configuration including a CPU (Central Processing Unit), a main memory, a display device, an input device, an external storage device, and the like. After the program and data recorded in a storage medium such as a CD-ROM are installed in the external storage device via the, the respective processing functions are executed by reading them from the external storage device into the main memory and processing them by the CPU.

  From the user terminal 30 to the ONU 31 and the OLT 32 and the concentrator switch 33 to the edge router 34 is an access section, from the edge router 34 to the core network 37 is a network section, and the bandwidth management server 35 and the call connection server 36 are server sections.

  In the bandwidth management system of this example having such a configuration, for example, an edge router 34 provided at the entrance of the core network 37 from the user terminal 30 in order to control upstream traffic from the user terminal 30 to the core network 37. Is provided with a bandwidth control function for controlling the output bandwidth of data in the access device (ONU 31) constituting the access section up to the front of the traffic. To prevent inflow. Here, the bandwidth control function of the access device (ONU 31) is realized by a configuration that determines the rate limit of the ONU 31.

  The bandwidth management server device 35 has a function of calculating a control value of an output bandwidth by the bandwidth control function in response to a connection request from the user terminal 30 via the call connection server 36 as a programmed computer processing function. And a function of notifying the calculated control value to the access devices (31, 32) connected to the user terminal 30.

  In particular, in this example, an access dedicated bandwidth management server 38 is provided, and the bandwidth management server device 35 is requested from the user terminal 30 via the call connection server 36 as described above as a programmed computer processing function. The call connection server device 36 has a function of determining whether or not to accept the received bandwidth and a function of transmitting the determination result information. The call connection server device 36 determines whether or not to accept the bandwidth from the bandwidth management server device 35 as a programmed computer processing function. A function for receiving information and a function for performing call connection control in response to a connection request from the user terminal 30 in accordance with the received determination result information on whether or not to accept a bandwidth. As a processing function, a function for receiving determination result information on whether or not bandwidth acceptance is possible from the bandwidth management server device 35, and reception If the discriminant result information is acceptable, the function for calculating the control value of the output band by the bandwidth control function in response to the connection request from the user terminal 30 and the calculated control value are connected to the user terminal 30. And a function of notifying the access device (31, 32).

  As described above, in this example, the access dedicated bandwidth management server 38 is provided in the access section separately from the bandwidth management server for the entire network, and the access dedicated bandwidth management server 38 is connected to the bandwidth management server 35 in the server section. Based on information from the server 36, the rate limit of the ONU 31 is determined, and the bandwidth limit is set by setting the rate limit in the ONU 31.

  That is, in this example, one dedicated access bandwidth management server 38 provided separately from the bandwidth management server for the entire network is connected to each edge router including the edge router 34, and each E− under the edge router is connected. Controls the PON system (ONU31, OLT32).

  As shown in FIG. 4, the ONU 31 as an access device has a plurality of queues inside, and can set an upstream rate limit for each queue.

  FIG. 4 is a block diagram showing a configuration example of the ONU in FIG. 3, and particularly shows a configuration related to the rate limit function. 4, 41 is the same as the ONU 31 in FIG. 3, and 42 is the same as the OLT 32 in FIG.

  The ONU 41 has two queues, a high priority queue 43 and a low priority queue 44 in the upstream direction, and distributes input IP packets to one of the queues according to a TOS (Type Of Service) value, VLAN priority, or the like.

  Here, the rate limit of the high priority queue 43 is 1 Mbps. As a result, even if, for example, 2 Mbps is input to the high priority queue 43, it is only output at a maximum of 1 Mbps, and frames are accumulated in the high priority queue 43. Frames overflowing from the high priority queue 43 are discarded.

  The bandwidth management server 35 includes the IP addresses of all user terminals including the user terminals 30 connected to the core network 37, the IP address of the edge router (34) that accommodates the user terminal (30), and the edge router ( 34), the IP address set information of the access-only bandwidth management server connected to (34) is held as a table 35a.

  Further, the access dedicated bandwidth management server 38 holds information on the user terminal (30) under the edge router (34) to which it is connected and the E-PON system in the contents of the table 51 shown in FIG.

  That is, FIG. 5 is a configuration example of a table included in the ONU in FIG. 4. In this table 51, for each user terminal, the IP address assigned to the user terminal and the OLT in which the user terminal is accommodated. , The PON interface ID (PON-IF • ID) that accommodates the ONU of the user terminal, and the ONU management number of the user terminal are registered in association with each other.

  One or more PON-IFs can be mounted on the OLT 42 (32), and one PON 41 (31) is connected to one PON-IF. For example, if 16 PON-IFs can be mounted in the OLT 52 (32), the PON-IF ID is any one of 1 to 16, and IDs do not overlap within the same OLT.

  The ONU management number is a number for identifying ONUs (31, 41) connected under the same PON. When 32 ONUs are connected under a certain PON, those ONU numbers are 1 to 3. 32, and a plurality of ONUs under the same PON do not have the same ONU number.

  The operation of each band management device when such an ONU 41 (31) serves as a band control point will be described with reference to FIGS.

  6 is a sequence diagram showing a first operation example of bandwidth management control using the ONU in the network in FIG. 3 as a bandwidth control point, and FIG. 7 shows the ONU in the network in FIG. 3 as a bandwidth control point. FIG. 8 is a sequence diagram showing a third operation example of bandwidth management control using the ONU in the network in FIG. 3 as a bandwidth control point.

  The above-described table 35a is registered in advance in the bandwidth management server 35, and the table 51 shown in FIG.

  In this example, only the rate limit value of the queue of the ONU (31, 41) to which traffic to be subjected to bandwidth management is input is changed, and the rate limit value of the queue to which traffic not to be managed is input is not changed.

  In this example, the bandwidth management is performed only for the high priority traffic input to the high priority queue 43, and the initial value of the rate limit of the high priority queue of all ONUs is set to “0”.

  FIG. 6 shows an example of the processing operation when the call connection is not established due to insufficient bandwidth, and FIG. 7 shows the processing operation when the call connection is established with sufficient bandwidth.

  When a certain user terminal 30 attempts to transmit / receive high priority data, the user terminal 30 requests a call connection to the call connection server 36. When the call connection server 36 receives the request, the call connection server 36 informs the bandwidth management server 35 of the start point IP address, end point IP address, start point port number, end point port number, and protocol of the requested data.

  The bandwidth management server 35 calculates the bandwidth requested by the user from these pieces of information, compares the currently accepted traffic volume with the network capacity, and calculates whether there is a free bandwidth.

  If there is no available bandwidth, as shown in FIG. 6, the bandwidth management server 35 notifies the call connection server 36 of insufficient bandwidth, and the call connection server 36 rejects the call connection request of the user terminal 30.

  If the bandwidth is available, the bandwidth management server 35 sets the rate limit value for the requested flow to the edge router 34 in which the user terminal 30 is accommodated, as shown in FIG. Instruct to use the determined bandwidth.

  Further, the bandwidth management server 35 notifies the access-only bandwidth management server 38 connected to the edge router 34 of the IP address of the requesting user terminal (30) and the bandwidth of the flow permitted for call connection.

  Upon receiving the notification from the bandwidth management server 35, the access dedicated bandwidth management server 38 identifies the OLT 32, PON-IF, and ONU 31 that accommodates the user terminal (30) from the held table 51 of FIG. On the other hand, it is instructed to add only the numerical value notified from the bandwidth management server 35 to the rate limit of the high priority queue of the ONU 31 to which the user terminal 30 is connected.

  Based on this instruction, the OLT 32 adds the rate limit of the high priority queue in the ONU 31. For example, when the rate limit before addition is 20 Mbps and the bandwidth notified from the bandwidth management server 35 is 15 Mbps, the rate limit of the high priority queue of the ONU 31 is 35 Mbps.

  Thereafter, the bandwidth management server 35 notifies the call connection server 34 that the bandwidth is available, and the call connection server 34 that has received the notification permits the call connection request of the user terminal 30.

  FIG. 8 shows a processing operation when the call connection is terminated. Upon receiving a call termination notification from the user terminal 30, the call connection server 36 disconnects the call connection and notifies the call disconnection. As with the call connection establishment, information such as the data start point IP address, end point IP address, start point port number, end point port number, and protocol is transmitted to the bandwidth management server 35.

  The bandwidth management server 35 that has received the information determines the bandwidth of the traffic for which the call has ended from these pieces of information, updates the information on the currently accepted traffic volume, and then the edge router 34 in which the user terminal 30 is accommodated. Is instructed to return to the setting that does not transmit the completed flow.

  Further, the bandwidth management server 35 notifies the access dedicated bandwidth management server 38 connected to the edge router 34 of the IP address of the user terminal 30 and the bandwidth of the traffic for which the call is terminated.

  Upon receiving the notification, the access-dedicated bandwidth management server 38 identifies the OLT 32, PON-IF, and ONU 31 that accommodates the user terminal 30 from the held table 51 of FIG. 5, and the user terminal 30 connects to the OLT 32. The ONU 31 is instructed to subtract the rate limit value of the high priority queue of the ONU 31 by the numerical value notified from the bandwidth management server 35.

  Based on this instruction, the OLT 32 subtracts the rate limit of the high priority queue in the ONU 31.

  As described above, in this example, the ONU 31 and the edge router 34 perform two-stage bandwidth control, but the bandwidth control in the ONU 31 is different from the detailed control for each flow as performed in the edge router 34. It manages the bandwidth of the entire traffic.

  That is, the setting from the OLT 32 to the ONU 31 is only addition / subtraction of a simple rate limit, and does not consider the current call state. For this reason, there may be a difference between the traffic managed by the bandwidth management server 35 and the actual rate limit value due to loss of control frames between the bandwidth management server 35 and the OLT 32.

  In order to correct this, the bandwidth management server 35 periodically checks the rate limit value of the ONU 31 through the access dedicated bandwidth management server 38. If there is a difference between the managed bandwidth and the confirmed rate limit value, the rate limit value of the ONU 31 is corrected to the bandwidth value managed by the bandwidth management server 35.

  By doing in this way, each user terminal including the user terminal 30 cannot transmit high-priority traffic exceeding the band for which call control is correctly performed before the ONU (31), and illegally transmits a large amount. Traffic does not affect other user terminals.

  As described above, in this example, the bandwidth control point is provided by implementing the rate limit function in the access devices (ONU 31 and OLT 32) on the terminal 30 side from the edge router 34, and the bandwidth management server 35 Through the management server 38, a rate limit or shaping value is set for the access device (ONU 31, OLT 32) so that traffic exceeding the reception band does not flow into the access section.

  As an embodiment different from such an example, a rate limit may be set in the OLT 32. That is, it is assumed that the OLT 32 has a queue for each ONU (31) in the upstream direction, and can independently set a rate limit.

  In this case, the table held by the bandwidth management server 35 or the access dedicated bandwidth management server 38 is the same as the above example (the table 51 shown in FIG. 5 etc.), but the OLT (32) is the rate limit of the ONU (31). Is set, and the rate limit value of each queue of the OLT (32) itself is changed.

  In the case where the access device is not the E-PON system of the above-described example but a media converter, the same bandwidth management can be performed by setting a rate limit with the slave unit of the media converter. In that case, a rate limit function is provided in the slave unit of the media converter.

  Then, the bandwidth management server 35 or the access dedicated bandwidth management server 38 holds, as a table, combinations of IP addresses of all subordinate user terminals, IP addresses of media converter master units that accommodate the users, and interface IDs.

  Further, when VDSL is used for the access line, rate limiting can be performed by the VDSL aggregation device. In this case, the VDSL aggregation device can set a rate limit for each slave unit, and the bandwidth management server 35 or the access dedicated bandwidth management server 38 uses the IP address of the user terminal and the user terminal as a table. The combination of the IP address and interface ID of the accommodated VDSL aggregation device is held.

  Furthermore, regardless of the type of access device, a rate limit can be set in the line concentrator switch (33) for concentrating each access device.

  In this case, the line concentrator switch (33) is connected to the edge router (34), has a queue for each user terminal (30), and is capable of setting a rate limit, and is more user terminal than the line concentrator switch (33). On the (30) side, it is assumed that fair control between users is working.

  Then, the bandwidth management server (35) or the access dedicated bandwidth management server (38) holds a combination of the IP address of the user terminal and the IP address of the line collecting switch that accommodates the user terminal as a table.

  In the case of this technology, the user terminal (30) side of the line concentrator switch (33) performs fair control between users, and each user terminal cannot use more than the bandwidth obtained by dividing the total bandwidth by the number of users. Therefore, unauthorized traffic does not affect other users between the user terminal (30) and the line collecting switch (33).

  As described above with reference to FIGS. 3 to 8, in the bandwidth management system and method of this example, conventionally, the edge router, the call connection service, and the bandwidth management server cooperate with each other so that the bandwidth from the edge router to the network side The bandwidth control point is provided in the access device (VDSL, PON, etc.) in which the user terminal is accommodated so as to perform bandwidth control on the user terminal side as viewed from the edge router. By coordinating the point and the bandwidth management server, unauthorized information transmission is regulated at a point closer to the transmission source so that traffic exceeding the accepted bandwidth does not flow into the access section.

  In other words, data output bandwidth control is performed for the access devices (31, 32, 33) constituting the access section from the user terminal (30) to the edge router (34) provided at the entrance of the network (37). A bandwidth control function (43, 44) is provided, and the call connection server device (36) requests the bandwidth management server device (35) to determine whether or not the bandwidth can be accepted in response to a call connection request from the user terminal (30). Then, the bandwidth management server device (35) calculates the bandwidth required by the user terminal (30) in response to the request from the call connection server device (36), and determines whether or not there is a free bandwidth. When the call connection server device (36) receives the notification of the determination result that the bandwidth cannot be received from the bandwidth management server device (35), the call connection server device (36) receives the determination result. Is notified of the call connection refusal, and when the notification of the determination result indicating that the band can be accepted is received from the bandwidth management server device (35), a call connection establishment process with the user terminal (30) is performed, and the bandwidth management server device (35) ) Notifies the edge router device (34) of the determination result and determines that the edge router device (34) performs output control on the data from the user terminal (30) when the bandwidth is determined to be free. The dedicated bandwidth management server (38) notifies the dedicated bandwidth management server (38), and the received dedicated bandwidth management server (38) receives the bandwidth control function (43) of the access device (31, 32, 33) connected to the user terminal (30). , 44) to calculate the output bandwidth control value and notify the access device (31, 32, 33), and the access device (31, 32, 33) uses the dedicated bandwidth management server device (38). By using the control value notified from the access device (31, 32, 33), the bandwidth control function (43, 44) controls the output bandwidth of the data from the user terminal (30). Inflow of traffic exceeding the reception band from the user terminal (30) in the section is prevented.

  Note that the bandwidth management server device (35) or the access dedicated bandwidth management server device (38) controls the bandwidth of the access devices (31, 32, 33) at a predetermined cycle as a function realized by programmed computer processing. The function of acquiring the control value set by the means and determining the difference from the bandwidth value managed by itself, and if there is a difference, the bandwidth value managed by itself is assigned to the access device (31, 32). 33), and the access device (31, 32, 33) changes the control value in the bandwidth control function (43, 44) to the bandwidth value notified from the bandwidth management server device (35). Correct it.

  In this way, (a) by providing a bandwidth control point in the access device separately from the edge router of the prior art, traffic exceeding the bandwidth permitted for call connection flows in the access section and becomes traffic of other users. It is possible to prevent the influence. Further, (b) by synchronizing the rate limit grasped by the bandwidth management server and the rate limit of the actual access device, it is possible to eliminate the deviation of the set value due to the loss of the control packet. In addition, (c) by providing a dedicated bandwidth management server (38) for the access device, the load on the bandwidth management server (35) in the server section can be reduced.

  In addition, this invention is not limited to the example demonstrated using FIGS. 3-8, In the range which does not deviate from the summary, various changes are possible. For example, in this example, the core network is described as an example, but the present invention is not limited to this.

  In this example, the control point in the access section is controlled by the newly provided access dedicated bandwidth management server 38, but the conventional bandwidth management server 35 has the same function as the access dedicated bandwidth management server 38. Thus, the control point in the access section may be controlled from the bandwidth management server 35.

  The access dedicated bandwidth management server 38 may be connected to the concentrator switch 33 instead of the edge router 34, and the function of the access dedicated bandwidth management server 38 may be provided in the edge router 34 or the concentrator switch 33. good.

  In this example, the rate limit function is used as the bandwidth control function provided in the access device (31, 32, 33). However, for example, a shaper function may be used.

It is a block diagram which shows the structural example of the conventional bandwidth management network. 7 is a flowchart showing an example of bandwidth management processing operation in the conventional bandwidth management network in FIG. 1. It is a block diagram which shows the structural example of the network which provided the user band management system which concerns on this invention. It is a block diagram which shows the structural example of ONU in FIG. 5 is a configuration example of a table included in the ONU in FIG. 4. FIG. 4 is a sequence diagram illustrating a first operation example of bandwidth management control using an ONU in the network in FIG. 3 as a bandwidth control point. FIG. 10 is a sequence diagram showing a second operation example of bandwidth management control using an ONU in the network in FIG. 3 as a bandwidth control point. FIG. 10 is a sequence diagram showing a third operation example of bandwidth management control using an ONU in the network in FIG. 3 as a bandwidth control point.

Explanation of symbols

  11, 30: User terminal (“terminal”), 12: Access device, 13, 33: Concentration switch (“concentration SW”), 14, 34: Edge router (“Edge Router”), 15, 35: Bandwidth management server 16, 36: Call connection server, 17, 37: Core network, 31, 41: ONU, 32, 42: OLT, 35a: Table, 38: Access dedicated bandwidth management server, 43: High priority queue, 44: Low priority Queue 51: table.

Claims (10)

A bandwidth management system for controlling upstream traffic from a user terminal to a network,
Bandwidth control means for performing data output bandwidth control is provided in an access device that forms an access section from the user terminal to the edge router provided at the entrance of the network, and the access device allows the access section to A bandwidth management system that prevents inflow of traffic exceeding a reception bandwidth from a user terminal. The bandwidth management system according to claim 1,
Band management comprising means for calculating a control value of an output band by the band control means in response to a connection request from the user terminal, and means for notifying the calculated control value to an access device to which the user terminal is connected A bandwidth management system comprising a server device. The bandwidth management system according to claim 1,
A bandwidth management server device comprising: means for determining whether or not the bandwidth requested from the user terminal is acceptable; and means for transmitting determination result information;
A call comprising means for receiving bandwidth acceptance determination result information from the bandwidth management server device and means for performing call connection control for a connection request from the user terminal in accordance with the received bandwidth acceptance determination result information A connection server device;
The means for receiving the determination result information on whether or not the band can be received from the band management server device, and if the received determination result information indicates that the band can be received, the output bandwidth of the band control unit according to the connection request from the user terminal. A bandwidth management system comprising: a dedicated bandwidth management server device including means for calculating a control value and means for notifying an access device connected to the user terminal of the calculated control value. A bandwidth management system for controlling upstream traffic from a user terminal to a network,
A bandwidth management server device comprising: means for determining whether or not the bandwidth requested from the user terminal is acceptable; and means for transmitting the determination result information;
Means for receiving discrimination result information on whether or not bandwidth acceptance is possible from the bandwidth management server device; and a call connection server device that performs call connection control in response to a connection request from the user terminal according to the received discrimination result information on whether or not bandwidth acceptance is possible;
Means for receiving determination result information on whether or not bandwidth acceptance is possible from the bandwidth management server device, and if the received judgment result information is bandwidth acceptance, the data transmitted from the user terminal in the bandwidth to the network An edge router device comprising means for performing output control;
An access device that is provided in an access section from the user terminal to the front of the edge router device, and that performs output bandwidth control on the data transmitted from the user terminal from the provided data output bandwidth control means;
The means for receiving the determination result information on whether or not the band can be received from the band management server device, and if the received determination result information indicates that the band can be received, the output bandwidth of the band control unit according to the connection request from the user terminal. A dedicated bandwidth management server device comprising means for calculating a control value and means for notifying the calculated control value to an access device connected to the user terminal;
A bandwidth management system characterized in that the access device is a bandwidth control point to prevent inflow of traffic exceeding the accepted bandwidth into the access section. The bandwidth management system according to any one of claims 2 to 4,
The bandwidth management server device according to claim 2 or the dedicated bandwidth management server device according to claim 3 or claim 4 obtains a control value of the bandwidth control means in the access device at a predetermined cycle. Means for determining a difference from a bandwidth value managed by the management server device;
If there is a difference, a means for notifying the access device of the bandwidth value managed by the bandwidth management server device is provided,
The access device modifies the control value in the bandwidth control means to the bandwidth value notified from the bandwidth management server device. The bandwidth management system according to any one of claims 1 to 5,
The band control means is
Concentrator switch connected to the user terminal side of the edge router,
ONU in the PON system,
OLT in the PON system,
Media converter that performs interface conversion between optical and electrical signals,
A bandwidth management system provided in any of the VDSL aggregation devices, wherein any one of the line concentration switch, the ONU, the OLT, the media converter, and the VDSL aggregation device is the access device. An access device provided in the access section from the user terminal to the front of the edge router provided at the entrance of the network,
7. An access device comprising bandwidth control means in the bandwidth management system according to claim 1. A bandwidth management server device that determines whether or not the bandwidth requested from the user terminal is acceptable;
A call connection server device that performs call connection control in response to a connection request from the user terminal according to a determination result of whether or not the bandwidth can be accepted by the bandwidth management server device;
An edge router device that performs output control to the network of data transmitted from the user terminal in the band according to the determination result that the band can be accepted by the band management server device;
A bandwidth management method for a system that controls an upstream traffic from a user terminal to a network, comprising an access device that configures an access section from the user terminal to the front of the edge router device,
The access device is provided with bandwidth control means for performing data output bandwidth control,
In response to a call connection request from the user terminal, the call connection server device requests the bandwidth management server device to determine whether or not to accept a bandwidth,
The bandwidth management server device calculates a bandwidth required by the user terminal in response to a request from the call connection server device, determines whether or not there is an available bandwidth, and displays the result as the call connection server device. Notify
When the call connection server device receives a notification of the determination result that the bandwidth cannot be received from the bandwidth management server device, the call connection server device notifies the user terminal of the call connection rejection and determines that the bandwidth can be received from the bandwidth management server device. When the notification of the result is received, call connection establishment processing with the user terminal is performed,
When the bandwidth management server device determines that there is a bandwidth available, it notifies the edge router device of the determination result and causes the edge router device to perform output control on the data from the user terminal,
Calculate the output bandwidth control value by the bandwidth control means of the access device to which the user terminal is connected, and notify the access device,
The access device performs output bandwidth control of data from the user terminal by the bandwidth control means using the control value notified from the bandwidth management server device,
A bandwidth management method for preventing inflow of traffic exceeding the accepted bandwidth from the user terminal in the access section. The bandwidth management method according to claim 8, wherein
A dedicated bandwidth management server device that calculates a control value of an output bandwidth by the bandwidth control means of the access device is provided,
When determining that the bandwidth is free, the bandwidth management server device notifies the dedicated bandwidth management server device of the determination result, and the dedicated bandwidth management server device connects the user terminal to the access device. A bandwidth management method comprising calculating a control value of an output bandwidth by a bandwidth control means and notifying the access device. The bandwidth management method according to claim 8 or 9, wherein
The bandwidth management server device according to claim 8 or the dedicated bandwidth management server device according to claim 9 acquires the control value of the bandwidth control means in the access device at a predetermined cycle and manages the bandwidth value by itself. And if there is a difference, notify the access device of the bandwidth value managed by itself,
The access device that has received the notification corrects the control value in the bandwidth control means to the notified bandwidth value.

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