JP2003218925A - Communication bandwidth management system and communication bandwidth management method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To attain effective utilization of a communication bandwidth even when there exists dispersion in the communication bandwidth in a communication path used for a communication service. <P>SOLUTION: At start of communication service between a user terminal 1 and a server 2, communication apparatuses 31, 32, 41, 42, 51, 52 transmit assignable communication bandwidth information indicative of an assignable communication bandwidth as to a communication path connected to them to a corresponding management apparatus among management apparatuses 6, 7, 8, the management apparatus 6, 7, 8 transit the assignable communication bandwidth information received from the communication apparatuses to an integrated management apparatus 9, the integrated management apparatus 9 sets a minimum communication bandwidth in the assignable communication bandwidth indicated by the assignable communication bandwidth information as an assigned communication bandwidth, transmits a message denoting a value of the assigned communication bandwidth to each communication apparatus via the management apparatuses 6, 7, 8, and each communication apparatus uses the same common communication bandwidth according to the assigned communication bandwidth to perform the communication service. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication bandwidth management system and a communication bandwidth management method for controlling a communication bandwidth according to a communication service in a network system.

[0002]

2. Description of the Related Art A conventional communication service compatible network management system will be described with reference to FIG. 12
In order to explain how the network subsystem management device manages the communication bandwidth for the related network subsystem in the past when the communication service is provided on the network system. 2 is a network system configuration diagram of FIG. 12
1, 100 is a user terminal that uses a communication service on the network to access a server, and 200 is a user terminal 10 that uses a communication service on the network.
Server accessed from 0, 300, 400, 500
Are sub-networks that cooperate with each other to configure networks that provide this communication service, and 301 and 30.
2, 303 are communication devices in the sub-network 300, 4
01, 402 and 403 are communication devices in the sub-network 400, and 501, 502 and 503 are sub-networks 5.
00 is a communication device. As a communication path for providing the communication service on the network, 3012 is a communication path between the communication devices 301 and 302 in the sub-network 300, 4012 is a communication path between the communication devices 401 and 402 in the sub-network 400, Reference numeral 5012 is a communication path between the communication devices 501 and 502 in the sub-network 500. Reference numeral 1003 denotes a communication path for connecting and communicating between the user terminal 100 and the communication device 301, and 3021 denotes the communication device 302 and the subnetwork 40 in the subnetwork 300.
0 is a communication path between sub-networks for connecting and communicating the communication device 401 in 0, 4025 is the sub-network 40
0, the communication path between the sub-networks for connecting and communicating the communication device 402 in the sub-network 500 and the communication device 501 in the sub-network 500; and 5022, the server 200 and the communication device 502
Is a communication path for connecting and communicating. Also, 600, 7
00 and 800 are sub-networks 300 and 40, respectively.
It is a management device for setting communication bandwidth of 0,500 and managing communication.

The operation of the management device for controlling the bandwidth when providing a communication service on a conventional network system will be described below with reference to FIG. In order to receive the provision of the communication service, the user makes a contract with the communication carrier in advance, but at present, the common contract for the shared network equipment is a fixed communication bandwidth. In using the network, the user of the user terminal 100 concludes a fixed communication bandwidth use contract with the user of the sub-network 300 when using the communication path 3010 of the sub-network 300 accessed by the user terminal 100. Similarly, the owner of the server 200 concludes a fixed communication bandwidth usage contract with the user of the sub-network 500 to access. Subnetwork 300
The owner of the sub-network 500 concludes a fixed communication bandwidth usage contract with the owner of the sub-network 400 which is a mutual use network. This communication service is not fixed-dedicated communication between the user terminal 100 and the server 200, but a multi-connection that enables communication by switching communication between the user terminal 100 and the server 200, other user terminals, and other servers at any time. It is assumed that a communication service is provided. That is, when communication is performed between the user terminal 100 and the server 200 on this network, basically, 1003, 3012, 3024, 4012, unless there is an alternative line switching at the time of communication failure.
The communication channels 4025, 5012, and 5022 are used, and the communication bandwidth preset and secured for each communication channel can be used. However, it is assumed that the communication bandwidth set in advance by contract is not necessarily optimized on the assumption of fixed dedicated communication between the user terminal 100 and the server 200. In this case, the communication path 1003 is 5 Mbps, the communication path 3012 is 10 Mbps, and the communication path 3024 is 5 Mbps.
s, communication path 4012 is 100 Mbps, communication path 4025
Is 50 Mbps, the communication path 5012 is 10 Mbps, and the communication path 5022 is 10 Mbps. The upper limit communication bandwidth is preset between each communication device from each management device before using the communication service, and communication exceeding the main communication bandwidth cannot be used between the end points.

Next, the operation will be described. It is assumed that the user issues a communication request from the user terminal 100 to the server 200 to download the video data from the server 200. At that time, it is assumed that the communication path between the user terminal 100 and the server 200 is not used for communication of other users. In that case, the communication paths 5022, 50
12, 4025, 4012, 3024, 3012, 10
Video data is transmitted from the server 200 to the user terminal 100 through 03. Originally, in order for this video data to be transmitted without trouble, it is 10 Mbp in real time.
Assume that it is known in advance that s communication bandwidth is required. In that case, the communication paths 5022, 5012, and 3012 correspond to the maximum communication bandwidth of 10 Mbps. On the other hand, the communication path 4025 is 50 Mbps, the communication path 40
No. 12 has a communication bandwidth of 100 Mbps secured, so that at least 40 Mbps and 90 Mbps are not used, respectively, and remain in the secured state for the main communication. Further, since the communication paths 3024 and 1003 can only secure the maximum bandwidth of 5 Mbps, respectively, even when the communication service of 10 Mbps is desired between the user terminal 100 and the server 200, only the maximum bandwidth, that is, 5
Only Mbps is available. In this case, the maximum usable communication bandwidth of the communication path between the user terminal 100 and the server 200 is different, but the user terminal 100 and the server 200 are different.
When actually using the communication service between the two, since the data stays on the communication path with the smallest communication bandwidth among the communication paths through which data cannot be transmitted beyond the minimum communication bandwidth. Even if, for example, other communication bandwidths on the route secure a large communication bandwidth, only the minimum communication bandwidth can be used on all the communication routes. Actually, since data is accumulated in a communication path having only the lowest communication bandwidth, congestion, data rejection, and data retransmission occur, communication with the lowest communication bandwidth also becomes difficult. The influence of congestion, retransmission, and the like may further reduce the communication bandwidth in order to increase the communication amount, and may also impose a communication processing load on other communication.

As described above, it is general that the communication bandwidth cannot be uniformly secured on the communication path, and it is difficult to efficiently use the communication path due to this cause.

[0006]

In a conventional communication service providing network management system, a data packet transmitted from a transmission terminal including a server to a reception terminal is transmitted from a transmission source to a reception source via a plurality of sub-network systems. However, the communication bandwidth allocated to this communication is not necessarily the same in each sub-network system, and eventually, on the sub-network through which it passes,
The communication path with the narrowest communication bandwidth becomes the bottleneck, and the communication speed is determined. As a result, the difference between the other secured communication bandwidth and the narrowest communication bandwidth is wasted. Also, if you are using a communication service that affects the response performance, if there is a margin of expandable communication bandwidth even in the sub-network where the narrowest communication bandwidth is set, the user will respond unnecessarily. There was the inconvenience of providing a communication service that deteriorated in sex. Also, the responsiveness requirement differs depending on the communication service used,
Since the communication bandwidth control on each sub-network is not performed according to the communication service, in order to realize high responsiveness, a high communication bandwidth is secured in advance and this bandwidth is normally used unnecessarily. If the communication service is not available, or if the communication service is desired to have a high response with a low communication bandwidth secured in advance to improve efficiency, the low communication bandwidth Either the situation is that the patient responds to the low response due to the width. In any case, a situation occurs in which the user is disadvantageous and the communication bandwidth, which is a network resource, is not effectively used.

The present invention has been made in order to solve the above problems, and dynamically manages the bandwidth control according to the communication service, so that it can be compared with the conventional static bandwidth control. It becomes possible to efficiently use network resources, and it is possible to provide appropriate response performance to users.

[0008]

A communication bandwidth management system according to the present invention comprises a plurality of constituent paths and manages the communication bandwidth of a data communication path used for predetermined data communication. And acquiring allocatable communication bandwidth information indicating the allocatable communication bandwidth that can be allocated to the data communication for each constituent route, and performing a predetermined communication based on the acquired allocatable communication bandwidth information of each constituent route. A communication bandwidth setting device for setting a bandwidth as the assigned communication bandwidth for the data communication on the data communication path is provided.

The communication bandwidth setting device assigns the minimum assignable communication bandwidth among the assignable communication bandwidths of the constituent routes indicated in the assignable communication bandwidth information of the constituent routes to the data communication. The assigned communication bandwidth is set in the data communication path.

The communication bandwidth setting device acquires necessary communication bandwidth information indicating a necessary communication bandwidth necessary for the data communication, and the necessary communication bandwidth indicated by the acquired necessary communication bandwidth information. The minimum communication bandwidth among the allocatable communication bandwidths of each constituent route indicated in the allocatable communication bandwidth information of each constituent route is set in the data communication path as the allocation communication bandwidth for the data communication. It is characterized by

The communication bandwidth management system further comprises a measuring device for measuring the used communication bandwidth of the data communication after the start of the data communication, and a utilization indicating the used communication bandwidth of the data communication from the measuring device. The communication bandwidth information is acquired, and the free communication bandwidth information indicating the free communication bandwidth of each constituent route is acquired for each constituent route, and the assigned communication bandwidth, the used communication bandwidth, and the availability of each constituent route are acquired. And a communication bandwidth updating device that updates the assigned communication bandwidth based on the communication bandwidth and sets the updated assigned communication bandwidth in the data communication path.

The communication bandwidth updating device compares the assigned communication bandwidth with the used communication bandwidth, and when the assigned communication bandwidth is equal to or more than the used communication bandwidth, the used communication bandwidth is updated. It is characterized in that it is the assigned communication bandwidth after updating.

The communication bandwidth updating device compares the assigned communication bandwidth with the used communication bandwidth, and if the assigned communication bandwidth is less than the used communication bandwidth, free each of the constituent paths. A minimum free communication bandwidth is selected from the communication bandwidths, a total value of the selected minimum free communication bandwidth and the assigned communication bandwidth is compared with the use communication bandwidth, and the total value and the use are compared. The communication bandwidth having a smaller value out of the communication bandwidths is set as the updated assigned communication bandwidth.

The communication bandwidth setting device sets, in the data communication path, an assigned communication bandwidth to each data communication for a plurality of data communication with priorities set, and the communication bandwidth management system further comprises: For the plurality of data communications, after the start of each data communication, a measuring device for measuring the used communication bandwidth of each data communication, and a specific data communication among the plurality of data communications is designated as the designated data communication, Utilized communication bandwidth information indicating the utilized communication bandwidth of the specified data communication is acquired from the measuring device, and the available communication bandwidth of each constituent route and the allocated communication bandwidth to the data communication having lower priority than the specified data communication. The adjustable communication bandwidth information indicating the adjustable communication bandwidth is acquired for each constituent route, and the assigned communication bandwidth of the specified data communication and the specified data are acquired. Communication bandwidth update for updating the assigned communication bandwidth of the specified data communication based on the communication bandwidth used for communication and the adjustable communication bandwidth of each constituent route, and setting the updated assigned communication bandwidth for the data communication route And a device.

The communication bandwidth updating device compares the assigned communication bandwidth of the designated data communication with the used communication bandwidth of the designated data communication, and determines that the assigned communication bandwidth of the designated data communication is the designated data communication. When the used communication bandwidth is equal to or more than the used communication bandwidth, the used communication bandwidth of the designated data communication is set as the updated assigned communication bandwidth.

The communication bandwidth updating device compares the assigned communication bandwidth of the designated data communication with the used communication bandwidth of the designated data communication, and determines that the assigned communication bandwidth of the designated data communication is the designated data communication. When the communication bandwidth is less than the used communication bandwidth, the minimum adjustable communication bandwidth is selected from the adjustable communication bandwidths of the respective constituent routes, and the selected minimum adjustable communication bandwidth and the designated data communication allocation communication The total value of the bandwidth and the communication bandwidth used for the specified data communication are compared, and the communication bandwidth having the smaller value of the total value and the communication bandwidth used for the specified data communication is allocated after the update. It is characterized by the communication bandwidth.

The communication bandwidth updating device defines an upper limit value and a lower limit value for the updated assigned communication bandwidth,
The allocated communication bandwidth after updating is determined within the range of the upper limit value and the lower limit value.

The communication bandwidth management system according to the present invention is
A communication bandwidth management system configured to include a plurality of constituent paths and managing a communication bandwidth of a data communication path used for predetermined data communication, each of which is at least one constituent path among the plurality of constituent paths. Managing a plurality of management routes, and acquiring a allocable communication bandwidth information indicating a allocable communication bandwidth that can be allocated to the data communication for the managed configuration route, and the plurality of configuration routes from the plurality of management devices. For the allocatable communication bandwidth information, and based on the acquired allocatable communication bandwidth information of the plurality of constituent routes, a predetermined communication bandwidth is set in the data communication route as an allocation communication bandwidth for the data communication. It is characterized by having an integrated management device that operates.

The integrated management apparatus assigns the minimum assignable communication bandwidth of the assignable communication bandwidths of the constituent routes indicated in the assignable communication bandwidth information of the constituent routes to the data communication. The bandwidth is set in the data communication path.

The integrated management device acquires required communication bandwidth information indicating a required communication bandwidth required for the data communication from any of the management devices, and the required communication bandwidth information indicated by the acquired required communication bandwidth information. The minimum communication bandwidth of the communication bandwidth and the allocatable communication bandwidth of each constituent route indicated in the allocatable communication bandwidth information of each of the constituent paths is used as the allotted communication bandwidth for the data communication. It is characterized by being set in the route.

The communication bandwidth management system according to the present invention is
A communication bandwidth management system configured to include a plurality of constituent paths and managing a communication bandwidth of a data communication path used for predetermined data communication, each of which is at least one constituent path among the plurality of constituent paths. Has a plurality of management devices, each management device acquires and acquires the allocatable communication bandwidth information indicating the allocatable communication bandwidth that can be allocated to the data communication for the constituent route managed by the own device. While transmitting the allocatable communication bandwidth information to the other management apparatus, receiving the allocatable communication bandwidth information acquired by the other management apparatus from the other management apparatus, and in a predetermined case, among the plurality of management apparatuses A specific management device is designated as a representative management device, and the representative management device allocates the communication bandwidth information acquired by itself and the allocation received from another management device. Based on the available communications bandwidth information, and sets the data communication path a predetermined communication bandwidth as allocated communication bandwidth of the to the data communication.

Of the plurality of management devices, the management device which has acquired the necessary communication bandwidth information indicating the necessary communication bandwidth necessary for the data communication is designated as the representative management device,
The representative management device, the required communication bandwidth indicated in the acquired required communication bandwidth information, the assignable communication bandwidth information acquired by the own device and the assignable communication bandwidth received from another management device. A minimum communication bandwidth among the allocatable communication bandwidths indicated in the information is set in the data communication path as an allocation communication bandwidth for the data communication.

The communication bandwidth management system according to the present invention is
A communication bandwidth management system configured to include a plurality of constituent paths and managing a communication bandwidth of a data communication path used for predetermined data communication, the communication bandwidth management system being included in the data communication path, each of the plurality of constituent paths being included in the data communication path. Having a plurality of communication devices connected to at least one or more of the constituent paths,
Each communication device generates allocatable communication bandwidth information indicating the allocatable communication bandwidth that can be allocated to the data communication for the constituent route connected to the communication device, and the generated allocatable communication bandwidth information is used by other communication devices. While sending to
The assignable communication bandwidth information generated by another communication device is received from another communication device, and in a predetermined case, a specific communication device among the plurality of communication devices is designated as a representative communication device, and the representative communication device Based on the allocatable communication bandwidth information generated by the own device and the allocatable communication bandwidth information received from another management device, the predetermined communication bandwidth is used as the allocation communication bandwidth for the data communication, It is characterized by setting to.

Of the plurality of communication devices, the communication device that has acquired the necessary communication bandwidth information indicating the necessary communication bandwidth necessary for the data communication is designated as the representative communication device,
The representative management device, the required communication bandwidth indicated in the acquired necessary communication bandwidth information, the assignable communication bandwidth information generated by the own device and the assignable communication bandwidth information received from another management device. The minimum communication bandwidth among the allocatable communication bandwidths shown in (1) is set in the data communication path as the allocation communication bandwidth for the data communication.

The communication bandwidth management system further includes a measuring device for measuring the used communication bandwidth of the data communication after the start of the data communication, and the measuring device determines a predetermined one of the plurality of communication devices. The related communication device is designated as a dynamic representative communication device, and the dynamic representative communication device is
Use communication bandwidth information indicating the use communication bandwidth of the data communication is acquired from the measuring device, and free communication bandwidth information indicating the free communication bandwidth of each constituent route is received from another communication device for each constituent route. Then, the assigned communication bandwidth is updated based on the assigned communication bandwidth, the used communication bandwidth, and the free communication bandwidth of each of the constituent routes, and the updated assigned communication bandwidth is set in the data communication route. Is characterized by.

The dynamic representative communication device compares the assigned communication bandwidth with the used communication bandwidth, and when the assigned communication bandwidth is equal to or more than the used communication bandwidth, determines the used communication bandwidth. It is characterized in that it is the assigned communication bandwidth after updating.

The dynamic representative communication device compares the assigned communication bandwidth with the used communication bandwidth, and if the assigned communication bandwidth is less than the used communication bandwidth, free each of the constituent paths. A minimum free communication bandwidth is selected from the communication bandwidths, a total value of the selected minimum free communication bandwidth and the assigned communication bandwidth is compared with the use communication bandwidth, and the total value and the use are compared. The communication bandwidth having a smaller value out of the communication bandwidths is set as the updated assigned communication bandwidth.

The representative communication device sets, in the data communication path, a communication bandwidth allocated to each data communication for a plurality of data communication with priorities set, and the communication bandwidth management system further comprises: Regarding a plurality of data communications, after starting each data communication, a communication device having a measuring device for measuring a communication bandwidth used for each data communication and having a predetermined relationship with the measuring device is activated. Designated as an active representative communication device, the dynamic representative communication device designates a specific data communication among the plurality of data communications as a designated data communication, and indicates a communication bandwidth used by the measuring device for the designated data communication. Acquires the used communication bandwidth information and allocates it to other communication devices for the data communication with lower priority than the free communication bandwidth of each constituent route and the specified data communication. Get the adjustable communication bandwidth information indicating a bandwidth as an adjustable communication bandwidth for each configuration path,
The assigned communication bandwidth of the designated data communication, the used communication bandwidth of the designated data communication, and the adjustable communication bandwidth of each constituent route are updated, and the assigned communication bandwidth of the designated data communication is updated. The width is set to the data communication path.

The dynamic representative communication device compares the assigned communication bandwidth of the designated data communication with the used communication bandwidth of the designated data communication, and determines that the assigned communication bandwidth of the designated data communication is the designated communication bandwidth of the designated data communication. When the used communication bandwidth is equal to or more than the used communication bandwidth, the used communication bandwidth of the designated data communication is set as the updated assigned communication bandwidth.

The dynamic representative communication device compares the assigned communication bandwidth of the designated data communication with the utilization communication bandwidth of the designated data communication, and the assigned communication bandwidth of the designated data communication is the designated communication bandwidth of the designated data communication. When the communication bandwidth is less than the used communication bandwidth, the minimum adjustable communication bandwidth is selected from the adjustable communication bandwidths of the respective constituent routes, and the selected minimum adjustable communication bandwidth and the designated data communication allocation communication The total value of the bandwidth and the communication bandwidth used for the specified data communication are compared, and the communication bandwidth having the smaller value of the total value and the communication bandwidth used for the specified data communication is allocated after the update. It is characterized by the communication bandwidth.

The dynamic representative communication device defines an upper limit value and a lower limit value for the updated assigned communication bandwidth, and determines the updated assigned communication bandwidth within the range of the upper limit value and the lower limit value. It is characterized by

A communication bandwidth management method according to the present invention is a communication bandwidth management method for managing a communication bandwidth of a data communication path configured by a plurality of constituent paths and used for predetermined data communication. The assignable communication bandwidth information indicating the assignable communication bandwidth that can be assigned to communication is acquired for each constituent route, and based on the acquired assignable communication bandwidth information of each constituent route, a predetermined communication bandwidth is set to the data communication. Is set in the data communication path as a communication bandwidth allocated to the data communication path.

[0033]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiment 1. In the present embodiment, in performing dynamic bandwidth control, a plurality of communication devices that set a communication path corresponding to a communication service on a sub-network and a communication service provided can be assigned from the communication device. In a network system configured by an integrated management device connected to all communication devices capable of collecting communication bandwidth information and setting communication bandwidth to the communication device, the integrated management device relates to each communication service unit. By exchanging the communication bandwidth information with the communication device and dynamically setting and controlling the communication bandwidth according to the communication service, the communication bandwidth in the network is effectively utilized.

Communication bandwidth control in this embodiment will be described with reference to FIG. FIG. 1 is a network system configuration diagram for explaining communication bandwidth control in the present embodiment. In FIG. 1, 1 is a user terminal that accesses a server by using a communication service on the network, 2 is a server that is accessed from the user terminal 1 by using a communication service on the network, 3, 4, and 5 are: Each of the sub-networks constructs a network that provides this communication service in cooperation with each other, 31, 32, 33 are communication devices in the sub-network 3, 41, 42, 43 are communication devices in the sub-network 4, 51, 52 , 53 are communication devices in the sub-network 5. As a communication path for providing this communication service on the network, 31
2 is a communication path between the communication devices 31 and 32 in the sub-network 3, 412 is a communication device 4 in the sub-network 4.
A communication path 512 between the communication devices 1 and 42 and a communication path 512 between the communication devices 51 and 52 in the sub-network 5. Reference numeral 103 denotes a communication path for connecting and communicating between the user terminal 1 and the communication device 31, and 324 denotes an inter-subnetwork for connecting and communicating between the communication device 32 in the sub-network 3 and the communication device 41 in the sub-network 4. Communication path 425, a communication path between sub-networks for connecting and communicating the communication apparatus 42 in the sub-network 4 and the communication apparatus 51 in the sub-network 5, and 522 connecting communication between the server 2 and the communication apparatus 52. It is a communication path to do. Further, reference numerals 6, 7, and 8 are management devices that perform communication bandwidth setting and communication management of the sub-networks 3, 4, and 5, respectively. Reference numeral 9 denotes an integrated management device that communicates with each management device and manages the network in an integrated manner. In the present embodiment, the integrated management device corresponds to a communication bandwidth setting device. Further, in the present embodiment, the communication bandwidth management system is configured only by the integrated management device. Reference numerals 61, 71 and 81 denote assignable communication bandwidth information exchanged between the communication device and the management device, and between the management device and the integrated management device.

In FIG. 1, the communication path 103 is 5 Mbp.
s, the communication path 312 is 10 Mbps, and the communication path 324 is 50
Mbps, communication path 412 is 100 Mbps, communication path 42
5, the maximum possible bandwidth is 50 Mbps, the communication path 512 is 10 Mbps, and the communication path 522 is 10 Mbps, and it is possible to specify up to this setting. In that case, the operation when the server 2 delivers the video to the user terminal 1 will be described below. Communication paths 103, 312, 324, 412, 4 are used as communication paths for transmitting this video distribution.
25, 512, and 522 are assigned. The communication paths 103, 312, 324, 412, 425, 5
The communication path composed of 12, 522 corresponds to a data communication path, and the individual communication paths 103, 312, etc. that compose this data communication path correspond to constituent paths.

Next, the operation will be described. A communication service number is assigned to this video distribution communication service, and the communication paths assigned to transmissions compatible with this communication service are managed by the management device to which these communication paths belong and the integrated management device manages information related to communication bandwidth. To be done. In this case, the communication device included in each communication path assigns to the management device of the sub-network to which the communication device belongs, an assignable communication band that is a pair of the assigned communication service number and the communication bandwidth that can be assigned to this communication service. The width information 61, 71, 81 is transmitted.
The communication path information across the sub-networks is transmitted in duplicate from the communication device of each sub-network to the management device. Specifically, the communication device 31 is the communication path 103 and the communication path 312, the communication device 32 is the communication path 312 and the communication path 324, the communication device 41 is the communication path 324 and the communication path 412, and the communication device 42 is the communication path. 412 and the communication path 425, the communication apparatus 51 transmits the assignable communication bandwidth information to the corresponding management apparatus for the communication path 425 and the communication path 512, and the communication apparatus 52 for the communication path 512 and the communication path 522. Communication channels 103, 312, 3
The assignable communication bandwidth information of 24 is received by the management apparatus 6, the assignable communication bandwidth information of the communication paths 324, 412, 425 is received by the management apparatus 7, and the communication path 425,
The assignable communication bandwidth information of 512 and 522 is received by the management device 8. Each management device transmits the received allocatable communication bandwidth information to the integrated management device 9, which is a higher management device, in the same message format.

The integrated management device 9 confirms that the allocatable communication bandwidth information from all the management devices including the management devices 6, 7, and 8 has been received, and then, according to the flowchart of FIG. On the other hand, a unified appropriate communication bandwidth value setting process is performed, and the management devices 6, 7 and 8 related to this communication service are notified. The communication bandwidth set on the communication path by the integrated management device 9 is referred to as the assigned communication bandwidth. The management devices 6, 7, and 8 receive information indicating the value of the set assigned communication bandwidth from the integrated management device 9, and assign it to each communication device as the assigned communication bandwidth for the video distribution that is currently about to start. Send bandwidth setting command. Each communication device receives the information indicating the value of the assigned communication bandwidth from the corresponding management device, sets the communication bandwidth of the communication path between the communication devices to the assigned communication bandwidth, and sets the communication bandwidth between the user terminal 1 and the server 2. Performs video distribution and transmission.

The flow of the process of setting the assigned communication bandwidth in the integrated management device will be described below with reference to the flowchart of FIG. In the case of performing this video information distribution, even if there is a locally wide bandwidth communication channel in the communication channel transmitting this information, if there is at least one narrow bandwidth communication channel,
Since the narrow bandwidth communication path becomes a bottleneck, it is impossible to carry out communication beyond the narrow bandwidth, and it is impossible to use all the wide bandwidth. As a result, the communication speed is determined by the narrowest communication bandwidth in the transmission path. The processing of the flowchart of FIG. 2 will be described based on this premise. The integrated management device 9 first allocates the communication bandwidth information 6 from the management devices 6, 7, and 8 in step S101.
When waiting for the reception of 1, 71, 81 and receiving the assignable communication bandwidth information from all the management devices that manage the communication path set for the specific communication service (S10
2, S103), the process proceeds to step S104. In step S104, the smallest communication bandwidth value is selected from the received assignable communication bandwidth information of all the communication paths. In this example, 5 Mbps, 10 Mbps, 50 Mbps
ps and 100 Mbps are compared and the minimum value is 5 Mbps
ps is selected. Then, this value is transmitted to each management device as the value of the assigned communication bandwidth (S105).

Each management device has a function to communicate with a communication device under management forming a communication path corresponding to a corresponding communication service number.
The communication device transmits a setting command indicating the received value of the allocated communication bandwidth, each communication device sets the allocated communication bandwidth as the communication bandwidth for this communication service in accordance with the setting command, and thereafter, the target management from each communication device. The device is notified of the setting completion, and finally the management device notifies the integrated management device 9 of the setting completion. As a result, the communication service between the user terminal 1 and the server 2 is started. With such a mechanism, it is possible to set and allocate the same common communication bandwidth for each communication service via the integrated management device, the management device, and the communication device. At the end of the communication service, the information about the allocated communication bandwidth of the corresponding communication service is deleted in each management device.

As described above, according to the communication bandwidth management system of the present embodiment, even if the available communication bandwidths of the communication paths used at the start of each communication service vary, the same common By allocating the communication bandwidth to reduce the possibility of generating a wide communication bandwidth that is not used, it is possible to effectively utilize the communication bandwidth.

Embodiment 2. The communication bandwidth management system according to the second embodiment will be described below. Embodiment 1
In the above, the communication bandwidth that can be commonly used in each communication path that is used regardless of the communication service type was set as the assigned communication bandwidth. However, depending on the communication service, an unnecessarily wide communication bandwidth is assigned. There was a possibility that the width could not be used effectively. The second embodiment further shows a method of setting the assigned communication bandwidth according to the communication service type.

FIG. 3 is a network system configuration diagram for explaining the communication bandwidth management system according to the second embodiment. In FIG. 3, the same reference numerals as in FIG.
The description is omitted because it is similar to. The maximum communication bandwidth of each communication path is the same as in the example of FIG. 1 is different from FIG. 1 in the following two points. First, before the setting of the allocated communication bandwidth by the integrated management device 9, the server 2 corresponding to the end point for transmitting the communication service is necessary for this communication service. The required communication bandwidth information 22 indicating the communication bandwidth is transmitted to the nearest communication device, and the communication device receiving the required communication bandwidth information 22 transmits the required communication bandwidth information 22 to the management device corresponding to the own device. . Further, 61, 71, 81 are assignable communication bandwidth information exchanged between the communication device and the management device, as in the first embodiment, but 61, 71, 81 between the management device and the integrated management device 9. Unlike the above, the transmission and reception of the assignable communication bandwidth information 62, 72, 82 to which the required communication bandwidth field is added is performed.

Next, the operation will be described. Embodiment 1
Similarly, it is assumed that the server 2 provides a video distribution communication service in response to a request from the user terminal 1 to the server 2. When starting this communication service, the communication device 52 closest to the server 2 sets the necessary communication bandwidth information 22 indicating the value of the necessary communication bandwidth required to support this communication service.
It transmits to the management apparatus 8 to which the communication apparatus 52 belongs via.
The required communication bandwidth information 22 indicates the value of the required communication bandwidth and the communication service number. In the present embodiment, the required communication bandwidth of the communication service this time is 3 Mbps. The management device 8 that has received the necessary communication bandwidth information 22 stores the necessary communication bandwidth information in the memory in the management device. After that, the management device 8 receives, from each communication device, the assignable communication bandwidth information 81 of the managed communication path for transmitting the communication service between the user terminal 1 and the server 2. Thereafter, the management device 8 assigns the value of the required communication bandwidth to the assignable communication bandwidth information 81 if the necessary communication bandwidth information matching the leading communication service number is stored in the memory in the assignable communication bandwidth information 81. In addition to the information 81, the assignable communication bandwidth information 82 is transmitted to the integrated management device 9. At the same time, the other management devices 6 and 7 involved in the communication service between the user terminal 1 and the server 2 also do not receive the required communication bandwidth information 22 from the server 2, but between the managed user terminal 1 and the server 2. The assignable communication bandwidth information 61, 71 of the communication path for transmitting the communication service is received from each managed communication device. After the reception, if the required communication bandwidth information matching the communication service numbers of the assignable communication bandwidth information 61 and 71 is stored in the memory in the management device, the value of the required communication bandwidth can be assigned. Although it is added to the bandwidth information, if it is not stored, "-1" is added as a numerical value indicating that the required communication bandwidth information is not stored.
In this case, since the required communication bandwidth information is not stored in the management devices 6 and 7, "-1" is added. afterwards,
"-1" is assigned to the assignable communication bandwidth information 61 and 71, respectively.
The allocatable communication bandwidth information 62 and 72 added with is transmitted to the integrated management apparatus 9. The integrated management device 9 receives all communication bandwidth information corresponding to the communication service number,
The assigned communication bandwidth is set according to the flowchart shown in FIG. 4, and the result is returned to each management device.

The setting process of the assigned communication bandwidth in the integrated management device 9 will be described below with reference to the flowchart of FIG. Steps S201 to S204 are the first embodiment
Similar to steps S101 to S104 shown in, the smallest communication bandwidth value is first selected from the received communication bandwidth information of all the communication paths of the same communication service number. Let this value be A. In this example, 5 Mbps, 10
Mbps, 50 Mbps, 100 Mbps are compared,
The lowest minimum value of 5 Mbps is selected. Also step S
At 205, the largest communication bandwidth value is selected from all required communication bandwidth values for the same communication service number. Let this value be the value B. In this example, 3 Mbps is selected from -1, -1, and 3 Mbps. Next, in step S206, the values of A and B are compared and a small value is set as the assigned communication bandwidth (S207, S208). In this example, 5 Mbps (value A) and 3 Mbps (value B) are compared and 3 Mbps is set. Then, step S209
At, the value of the set assigned communication bandwidth is transmitted to each management device.

Each management device has a function to communicate with a communication device under management forming a communication path corresponding to a corresponding communication service number.
The communication device transmits a setting command indicating the received value of the allocated communication bandwidth, each communication device sets the allocated communication bandwidth as the communication bandwidth for this communication service in accordance with the setting command, and thereafter, the target management from each communication device. The device is notified of the setting completion, and finally the management device notifies the integrated management device 9 of the setting completion. As a result, the communication service between the user terminal 1 and the server 2 is started. With such a mechanism, it is possible to set and allocate a common common communication bandwidth suitable for the communication bandwidth required by each communication service via the integrated management device, the management device, and the communication device.

As described above, according to the communication bandwidth management system of the present embodiment, even if the available communication bandwidth of the communication path used at the start of each communication service varies, each communication Effectively utilize communication bandwidth by detecting the communication bandwidth required by the service and allocating the same common communication bandwidth to reduce the possibility of wide communication bandwidth that is not used. Things are possible.

Embodiment 3. The communication bandwidth management system according to the third embodiment will be described below. Embodiment 2
In the above, the control system by the integrated management device has been described, but in the third embodiment, the integrated management device is not necessary, and a system for performing equivalent processing by distributed control by a plurality of management devices in the lower layer will be described.

FIG. 5 is a network system configuration diagram for explaining the communication bandwidth control of the third embodiment. Figure 5
In, 1-8, 22, 31-33, 41-43, 5
1-53, 61, 71, 81, 312, 324, 41
All 2, 425, 512, 522 are the same as those in FIG. 1 or FIG. The assumption of the maximum communication bandwidth of each communication path is the same as in the examples of FIGS. The difference from FIG. 1 and FIG. 3 is that in FIG. 5, the integrated management device 9 shown in FIG. 1 and FIG. 3 does not exist regarding the optimum communication bandwidth setting. Instead of the integrated management device, for each communication service, the management device connected to the server that transmits the required communication bandwidth information sets the assigned communication bandwidth in the communication service as a representative of the management device. The representative management device is called a representative management device. Further, in the present embodiment, this representative management device corresponds to the communication bandwidth setting device. Further, in the present embodiment, the communication bandwidth management system is composed of a plurality of management devices.

Next, the operation will be described. When starting the communication service, the server 2 transmits the necessary communication bandwidth information 22 indicating the value of the necessary communication bandwidth required for supporting the communication service to the management device via the communication device. The management device refers to a management device that manages the communication device to which the server 2 is connected, and here refers to the management device 8.
The management device 8 that has received the required communication bandwidth information 22 becomes the representative management device. Further, the required communication bandwidth information 22 includes the value of the required communication bandwidth and the communication service number. Further, in this example, it is assumed that the required communication bandwidth of the communication service this time is 3 Mbps and the notification is made. The management device 8 that has received the necessary communication bandwidth information 22 stores the necessary communication bandwidth information in the management device internal memory.
This is the same as the second embodiment. For subsequent processing,
Description will be given according to the flowchart of FIG. Book management device 8
Receives from each of the communication devices the assignable communication bandwidth information 81 of the managed communication path for transmitting the communication service between the user terminal 1 and the server 2. After receiving, the management device 8 broadcasts the assignable communication bandwidth information 81 to other management devices via the communication device and the communication path (S30).
1). The management devices 6 and 7 also perform the same processing, and broadcast the allocatable communication bandwidth information of the communication device under management to other management devices. All management devices can share the allocatable communication bandwidth information of each communication path that can be used for each communication service by transmitting the allocatable communication bandwidth to other management devices. Is. After the broadcast between the management devices is completed and the allocatable communication bandwidth information of the communication path related to the communication service is collected and received (S302, S303), the allocated communication bandwidth value in the received message in step S304. Search for a message with a negative communication service number at the beginning. In the current situation, since the optimum communication bandwidth value has not yet been determined and transmitted, such a message does not exist, and the process proceeds to step S306. Next, step S
At 306, the management device 8 that has received the required communication bandwidth information 22 from the server 2 that is the transmission source of the communication service recognizes that it is the representative management device. Since the other management devices 6 and 7 have not received the necessary communication bandwidth information, they recognize that they are not the representative management device. If the other management devices 6 and 7 have received the assignable communication bandwidth information from the other managed communication device, the other management devices 6 and 7 repeatedly broadcast to the other management devices, and the assigned communication sent from the representative management device. Wait for bandwidth value. In this case, only the management device 8, which is the representative management device, confirms whether or not the assignable communication bandwidth information has been received from all the management devices corresponding to the communication service, and if not, waits for its arrival. (S307). If all the assignable communication bandwidth information corresponding to this communication service is available, the minimum value among them is set to the value A (S308), and the required communication bandwidth specified by the server for this communication service is set. The width value is set as the value B (S309), and the values of A and B are compared (S
310). The smaller one of A and B is set as the assigned communication bandwidth (S311 and S312), and a message notifying the assigned communication bandwidth value is transmitted to each management device. In this example, the communication bandwidth (value A) that can be commonly assigned to each communication path is 5 Mbps, and the required communication bandwidth (value B) is 3 Mbps, so 3 Mbps is selected. As the message format, a negative value obtained by multiplying the value of the communication service number by -1 is added to the beginning to distinguish it from the assignable communication bandwidth information between the management devices, and the assigned communication bandwidth value is paired. Send the message to all management devices.

After receiving the message notifying the allocated communication bandwidth, each management device determines that the message notifies the allocated communication bandwidth because the value of the leading communication service number is a negative value. , The respective management devices respectively set the assigned communication bandwidths for the communication devices and the communication paths under the control corresponding to this communication service.

As described above, in the present embodiment, even if the integrated management apparatus does not exist, the communication bandwidth information is exchanged between the plurality of management apparatuses by message exchange, and each communication service is performed as in the second embodiment. Even if there is a variation in the available communication bandwidth of the communication path used at the start, the communication bandwidth required by each communication service is detected, and the same common communication bandwidth is allocated, It is possible to effectively utilize the communication bandwidth by reducing the possibility that a wide communication bandwidth that is not used is generated.

Fourth Embodiment The fourth embodiment will be described below. In the second embodiment, the control system by the integrated management device has been described, but in the fourth embodiment, the integrated management device for the entire network and each management device for the sub-network are not necessary in determining the assigned communication bandwidth, and A method of providing an equivalent solution means by distributed control by a plurality of composing communication devices will be described.

FIG. 7 is a network system configuration diagram for explaining communication bandwidth control in the fourth embodiment. 7 are the same as those in FIG.
The description is omitted because it is the same as. Further, the assumption of the maximum communication bandwidth of each communication path is the same as in the example of FIG. 3 and FIG. 5 is different from FIG. 3 and FIG. 5 in regard to the setting process of the allocated communication bandwidth, in the present embodiment, the integrated management device 9 shown in FIG. 8 does not exist. Instead of the integrated management device and management device, the communication device connected to the server that sends the required communication bandwidth information for each communication service is the communication bandwidth evaluation /
The assigned communication bandwidth value is determined as a representative of the determination process.
The representative communication device is referred to as a representative communication device.
In the present embodiment, this representative communication device corresponds to the communication bandwidth setting device. Further, in the present embodiment, the plurality of communication devices form a communication bandwidth management system.

Next, the operation will be described. When starting the communication service, the server 2 transmits the necessary communication bandwidth information 22 indicating the value of the necessary communication bandwidth required for the communication service, to the communication device to which the server 2 is connected. Here, it refers to the communication device 52. The required communication bandwidth information 22 includes the value of the required communication bandwidth and the communication service number. Further, in this example, it is assumed that the required communication bandwidth of the communication service this time is 3 Mbps and the notification is made. The communication device 52 that has received the necessary communication bandwidth information 22 stores the necessary communication bandwidth information in the memory in the communication device, as in the second embodiment. The subsequent processing will be described with reference to the flowchart of FIG. The communication device 52 generates allocatable communication bandwidth information 81 for a communication path connecting to the self device among the communication paths transmitting the communication service between the user terminal 1 and the server 2, and generates the allocatable communication bandwidth information 81. Broadcast to other communication devices (S401). Communication devices 31, 32,
41, 42, and 51 also perform similar processing, and broadcast the allocatable communication bandwidth information generated by each communication device to other communication devices. All communication devices can share the allocatable communication bandwidth information of each communication path that can be used for each communication service by transmitting the communication bandwidth that each communication device can allocate to other communication devices. Is. After the broadcast between the communication devices is completed and the assignable communication bandwidth information is collected and received for all the communication paths related to the communication service (S402, S403), step S
At 404, the received message searches for a message with a negative value in the first communication service indicating the allocated communication bandwidth value. In the current situation, since the optimum communication bandwidth value has not yet been determined and transmitted, such a message does not exist, and the process proceeds to step S406. Next, the communication device 52 that has received the necessary communication bandwidth information 22 from the server 2 that is the transmission source of the communication service recognizes that it is the representative communication device. Other communication device 31,
Since 32, 41, 42, and 51 have not received the required communication bandwidth information, they recognize that they are not the representative communication device. If the communication devices 31, 32, 41, 42, and 51 generate other assignable communication bandwidth information, the communication devices 31, 32, 41, 42, and 51 repeatedly broadcast to other communication devices, and the assigned communication bandwidth value transmitted from the representative communication device. Wait for a message indicating. In this case, only the communication device 52, which is the representative communication device, confirms whether the assignable communication bandwidth information has been received from all the communication devices corresponding to the communication service, and if not, waits for the arrival. (S407). If all the assignable communication bandwidth information corresponding to this communication service is available, the minimum value among them is set to the value A (S408), and the necessary communication bandwidth specified by the server for this communication service is set. The width value is set to the value B (S409), A
And the value of B are compared (S410). The smaller one of A and B is set as the assigned communication bandwidth (S411, S
412), and sends a message notifying the value of the assigned communication bandwidth to each communication device (S413). In this example, the communication bandwidth (value A) that can be commonly assigned to each communication path is 5 Mb.
ps, the required communication bandwidth (value B) is 3 Mbps,
3 Mbps is selected. As the message format, in order to distinguish it from the assignable communication bandwidth information between communication devices, a negative value obtained by multiplying the value of the communication service number by -1 is added to the beginning, and the assigned communication bandwidth value is paired. Send the message to all communication devices.

Since each communication device receives the message notifying the assigned communication bandwidth value, since the value of the communication service number at the head is a negative value, it is a message notifying the assigned communication bandwidth value. Then, each communication device sets the assigned communication bandwidth for the communication path corresponding to this communication service.

As described above, in the present embodiment,
Even if there is no integrated management device or management device, communication bandwidth information is exchanged between multiple communication devices by messages.
Similar to the schemes of the second and third embodiments, even when the available communication bandwidth of the communication path used at the start of each communication service varies, the communication bandwidth required by each communication service Is detected and the same common communication bandwidth is allocated to reduce the possibility that a wide communication bandwidth that is not used is generated, so that the communication bandwidth can be effectively utilized.

Embodiment 5. The fifth embodiment will be described below. In the third and fourth embodiments, the value of the required communication bandwidth required by each communication service is acquired as the advance notice information from the server 2 before the communication. However, when the communication processing is actually performed, the environment and communication Depending on how the service is used, it may be different from the communication bandwidth value that was originally assumed to be necessary at the time of advance notice. In the fifth embodiment, the communication bandwidth is allocated to the communication service, and after the communication service is provided, the actual communication service usage state is monitored, and the actual communication bandwidth usage status and the current allocated communication bandwidth are compared and evaluated. By dynamically adjusting and controlling the communication bandwidth even while the communication service is being used, it is possible to further effectively and effectively use the communication bandwidth.

The fifth embodiment will be described below. FIG. 9 is a network system configuration diagram for explaining the communication bandwidth control in the fifth embodiment. 9 are the same as those in FIG. 7, and the description thereof is omitted. The assumption of the maximum communication bandwidth of each communication path is the same as in the example of FIG.
The difference from FIG. 7 is the following four points. First, a communication bandwidth measuring device 14, 1 that is located between a communication path of a network and a communication device and periodically observes an actual communication bandwidth used.
5, 16 are connected and installed in the network. The communication bandwidth measuring devices 14, 15 and 16 correspond to measuring devices. Further, in the present embodiment, the plurality of communication devices and the plurality of communication bandwidth measuring devices form a communication bandwidth management system. Further, in FIG. 7, communication bandwidth information 61, 62, 63 that can be allocated between the communication devices at the start of the communication service.
9, the free communication bandwidth information 63, 73, 83 is exchanged between the communication devices after the communication service starts in FIG. The free communication bandwidth information is information indicating the value of the free communication bandwidth that can be additionally allocated at each communication path. The free communication bandwidth information includes the value of the free communication bandwidth and the communication service number. Further, in FIG. 7, the required communication bandwidth is notified from the server 2 as the required communication bandwidth information 22 before the communication service starts, but in FIG.
During execution of the communication service, the used communication bandwidth information is transmitted from the communication bandwidth measuring device. Reference numeral 18 in FIG. 9 indicates the used communication bandwidth information notified from the communication bandwidth measuring device 14. The used communication bandwidth information indicates the value of the used communication bandwidth when the communication service is executed. In addition, a memory for storing an assigned communication bandwidth value that is commonly assigned to each communication service is added to each communication device. Reference numeral 17 in FIG. 9 shows an example of the assigned communication bandwidth value for each communication service shown in this memory.

Next, the operation will be described. In the present embodiment, it is assumed that 3 Mbps has already been set as the assigned communication bandwidth for the communication service between the user terminal 1 and the server 2 by the procedure shown in the fourth embodiment, and the communication service has started. I assume. Within each communication device, the value (3 Mb) of the assigned communication bandwidth set for the communication service is set.
ps) is stored. This communication service includes a user terminal 1, a communication path 103, a communication device 31, and a communication path 31.
2, communication device 32, communication path 324, communication device 41, communication path 412, communication device 42, communication path 425, communication device 5
1, the communication transmission is performed via the communication path 512, the communication device 52, and the communication path 522. As shown in FIG. 9, the communication bandwidth measuring device 14 is connected on the communication path 312 and regularly measures the used communication bandwidth. In this example, the communication bandwidth measuring device 14 measures the communication amount used every minute for several seconds to calculate an average used communication bandwidth,
Repeated times, the maximum available communication bandwidth is selected from the 10 available communication bandwidths. Then, the used communication bandwidth information 18 indicating the selected maximum used communication bandwidth is transmitted to the communication device 32 to which the communication bandwidth measuring device 14 belongs.
A communication device that receives the used communication bandwidth information 18 is called a dynamic representative communication device. In FIG. 9, the communication device 32 corresponds to the dynamic representative communication device. In the present embodiment, the dynamic representative communication device corresponds to the communication bandwidth updating device. The dynamic representative communication device (communication device 32) uses the used communication bandwidth information 18
After receiving, the transmission request message of the free communication bandwidth information indicating the free communication bandwidth that can be further allocated by designating the communication service number is transmitted to all the communication devices. When each communication device allocates the communication bandwidth corresponding to the communication service number specified in the transmission request message to the communication path to be connected, it is not yet allocated and the available additional communication bandwidth is available. The requesting dynamic representative communication device (communication device 32) is notified as communication bandwidth information.

In the dynamic representative communication device (communication device 32),
As shown in the flowchart of FIG. 10, after receiving the used communication bandwidth information from the communication bandwidth measuring device (S501) and collecting the free communication bandwidth information from all the communication devices related to this communication service (S502), The assigned communication bandwidth is updated based on the available communication bandwidth information. First, in step S503, the allocated communication bandwidth (value A1) for the main communication service stored in the memory of the dynamic representative communication device.
And the used communication bandwidth value indicated by the used communication bandwidth information transmitted from the communication bandwidth measuring device 14 is 5 Mbps (value B)
Compare with. If the memory value (value A1) is larger than the used communication bandwidth value (value B), it means that the communication bandwidth that is larger than the actually used communication bandwidth is preset. This means that the communication bandwidth was wasted. In that case, in step S505, the dynamic representative communication device (communication device 32) updates the value of the assigned communication bandwidth to the use communication bandwidth value (value A1),
A bandwidth re-allocation request indicating the value of the updated communication bandwidth is sent to all communication devices related to this communication service, and each communication device re-allocates a smaller optimal communication bandwidth based on the bandwidth re-allocation request. Set. In this way, even after the initial setting, the communication bandwidth assumed to be necessary is evaluated at the execution stage,
If it is excessive, the bandwidth reduction review process is performed. This process is periodically repeated while the communication service is being executed, and dynamically adjusts the communication bandwidth.

If No in step S504, that is, if the value (value B) of the used communication bandwidth is larger than the value (value A1) in the memory, the required communication bandwidth is underestimated. As a result, the communication service may not be used efficiently by the user. In this case, the dynamic representative communication device (communication device 32) determines in step S
At 506, the lowest value is first selected from the additional allocatable free communication bandwidth values received from the communication device related to the communication service. Here, this value is 2 Mbp
Let s. Next, in step S507, the value of the memory corresponding to this communication service is added to the selected minimum free bandwidth value. Since the stored value of the memory, that is, the currently assigned communication bandwidth value is 3 Mbps,
Calculate 2 Mbps + 3 Mbps to get 5 Mbps. Let this value be A. The value B is the actual used communication bandwidth value received from the communication bandwidth measuring device. In step S508, the value A and the value B are compared, and the smaller value is set as the value of the updated assigned communication bandwidth (S509, S510). In this case, 5 Mbps because both are 5 Mbps
ps becomes the updated assigned communication bandwidth value. Next, in step S511, a negative communication service number and an updated allocated communication bandwidth value of 5 Mbps are paired and broadcast to all communication devices. After that, the dynamic representative communication device (communication device 32) rewrites the allocated communication bandwidth corresponding to the communication service stored in the memory into the updated allocated communication bandwidth.

Since each communication device that has received the broadcast message is designated with a negative communication service number at the beginning, the message indicates the updated allocated communication bandwidth value. The communication device that has recognized and has already allocated the bandwidth to this communication service resets the communication bandwidth of the corresponding communication service number to the updated allocated communication bandwidth. After the resetting, each communication device also rewrites the assigned communication bandwidth of the corresponding communication service number in the memory to the similarly reset value. This process is periodically repeated while the communication service is being executed, and dynamically adjusts the communication bandwidth.

As described above, according to this embodiment, after setting the optimum communication bandwidth before starting the communication service in the related communication path and communication device, the communication status is automatically monitored at the time of execution. It is possible to evaluate and actually dynamically adjust and set the optimum communication bandwidth. Further, in the present embodiment, the distributed control method among a plurality of communication devices has been described,
The same processing can be realized and the same effect can be expected in the cooperative distributed control management method using a plurality of sub-network management devices and the centralized management control method using a centralized management device. Further, in the present embodiment, in order to indicate the optimum communication bandwidth notification,
Although the negative communication service number value was used, it is also possible to indicate the optimum communication bandwidth notification by adding a unique control header indicating the optimum communication bandwidth to the message or by setting a unique communication message format. Therefore, this example is an example. The same effect can be expected with any method.

Sixth Embodiment The sixth embodiment will be described below. In the fifth embodiment, only the free communication bandwidth of each communication device is the communication bandwidth that can be additionally used, but this is premised on that all communication services are provided with the same priority. In the sixth embodiment, the priority order is designated for each communication service, and the communication bandwidth assigned to the communication service having a lower priority is available as well as the available communication bandwidth for the communication service having a higher priority. As with the communication bandwidth, a method of using it as an additionally available communication bandwidth is adopted.

The communication bandwidth control of the sixth embodiment will be described with reference to FIGS. 9 and 10 as in the fifth embodiment. In the present embodiment, for the communication service between the user terminal 1 and the server 2, 3 Mbps has already been set as the allocated communication bandwidth by the same procedure as in the fourth embodiment, and the communication service has started. Suppose. It is assumed that the value of the assigned communication bandwidth set for each communication service is stored in each communication device. In FIG. 9, it is assumed that 3 Mbps is stored in the memory for the communication service between the user terminal 1 and the server 2. The memory stores one line for each communication service. As the information for each service, in addition to the communication service number and the allocated communication bandwidth, the priority order of the communication service is recorded. The priority of this communication service shall be broadcast from the server to all communication devices that transmit the communication service at the start of the communication service through the communication path, and the priority of each communication service shall be recorded in the memory of each communication device. To do.

This communication service includes user terminal 1, communication path 103, communication device 31, communication path 312, communication device 32,
Similar to the previous example, the communication transmission is executed via the communication path 324, the communication device 41, the communication path 412, the communication device 42, the communication path 425, the communication device 51, the communication path 512, the communication device 52, and the communication path 522. Is. Further, similarly to the fifth embodiment, the communication bandwidth measuring device 14 is connected on the communication path 312, periodically measures the used communication bandwidth, and transmits the used communication bandwidth information 18 to the communication device. Communication bandwidth information used 1
A communication device that receives 8 is called a dynamic representative communication device. In FIG. 9, the communication device 32 corresponds to the dynamic representative communication device.
In the present embodiment, the dynamic representative communication device corresponds to the communication bandwidth updating device. Further, in the present embodiment, the plurality of communication devices and the plurality of communication bandwidth measuring devices form a communication bandwidth management system. When a plurality of communication services are being executed, the dynamic representative communication device (communication device 32) designates a specific communication service from among the plurality of communication services as a designated communication service (designated data communication).
Then, the used communication bandwidth information 18 indicating the communication bandwidth used in the designated communication service is received from the communication bandwidth measuring device 14. Further, after receiving the used communication bandwidth information 18, the number of the designated communication service is designated and a transmission request message of the free communication bandwidth which can be further allocated at present is transmitted to all the communication devices. When each communication device has allocated the communication bandwidth corresponding to the communication service number specified in the transmission request message to the communication path to be connected, in addition to the currently unallocated free communication bandwidth that can be additionally allocated, , The total of the communication bandwidths assigned to the communication services having lower priority than the designated communication service is notified to the requesting dynamic representative communication device 32 for each communication device. Here, the total of the free communication bandwidth and the sum of the communication bandwidths assigned to the communication services having a lower priority than the designated communication service is referred to as the adjustable communication bandwidth. As described above, in the sixth embodiment, the communication bandwidth notified from each communication device to the dynamic representative communication device includes not only the free communication bandwidth but also the communication bandwidth allocated to the communication service having a low priority. This is different from the fifth embodiment.

The dynamic representative communication device (communication device 32) collects all available communication bandwidth information related to this communication service, and then executes the process according to the flowchart of FIG. The process of updating the assigned communication bandwidth performed by the dynamic representative communication device is the same as in the case of the fifth embodiment. However, in step S506, the communication bandwidth having the lowest value among the adjustable communication bandwidths received from other communication devices is selected, and in step S507, the adjustable communication bandwidth having the lowest selected value and the currently assigned communication bandwidth are selected. Bandwidth value (value A
The total value with 1) is the value A.

In this example, it is assumed that 5 Mbps is set as the value of the assigned communication bandwidth after updating. Then, as in the case of the fifth embodiment, a message indicating the updated value of the assigned communication bandwidth is broadcast to other communication devices. Among the communication devices that have received the broadcast message, the communication device that has already allocated the bandwidth to this communication service (designated communication service) is assigned the updated communication bandwidth of the corresponding communication service number. Reset the communication bandwidth. In this case, when the updated assigned communication bandwidth is larger than the current free communication bandwidth, the memory storing the communication bandwidth for each communication service is referred to, and the communication service with the lowest priority is referred to. , Collect the allocated communication bandwidth. That is, almost zero communication bandwidth is reallocated to the low priority communication service, and the communication bandwidth used by the low priority communication service is set as the assigned communication bandwidth after the update of the designated communication service. Appropriated. Even if the collected communication bandwidth is added to the free communication bandwidth, if it is still less than the updated allocated communication bandwidth, the communication bandwidth allocated from the communication service with the next lower priority is collected. In this allocation process, when the updated communication bandwidth can be allocated to the designated communication service in each communication device, or the communication bandwidth of the communication service having a priority lower than the priority of the designated communication service becomes available. The process ends when all the items are collected. Such an allocation process is periodically repeated while the communication service is being executed, and the communication bandwidth is dynamically adjusted.

As described above, according to the present embodiment, after setting the optimum communication bandwidth before starting the communication service in the related communication path and communication device, the communication status is automatically monitored at the time of execution. It is possible to evaluate and actually dynamically adjust and set the optimum communication bandwidth. When reallocating communication bandwidth, not only the free communication bandwidth but also the allocated communication bandwidth with a low priority is targeted for reallocation, and the dynamically allocated resources are expanded. The dynamic bandwidth allocation can be effectively performed, and the quality of communication service is improved. Further, in the present embodiment, the distributed control method among a plurality of communication devices has been described. It is feasible and the same effect can be expected.

Embodiment 7. The seventh embodiment will be described below. In the methods of the first to sixth embodiments, the available communication bandwidth is unconditionally allocated depending on the request of the transmission source of the communication service to be started or the history of use of the communication service. Then, by setting the upper limit and the lower limit of the available communication bandwidth of the communication service, when setting the communication bandwidth at the start of using each communication service or when resetting the communication bandwidth during use, By enabling bandwidth allocation control within this usable range, multiple communication services can use communication bandwidth fairly.

The seventh embodiment will be described below. Embodiment 7
As a network configuration diagram for explaining the communication bandwidth control in FIG. 9, FIG. 9 is used as in the fifth and sixth embodiments. FIG. 11 is a flowchart showing a communication bandwidth selection process executed in the communication device according to the seventh embodiment. The difference from FIG. 10 is that the bandwidth range confirmation processing of S711 to S714 is added.

Next, the operation will be described. In this embodiment, 3 Mbps has already been allocated as the allocated communication bandwidth for the communication service between the user terminal 1 and the server 2 by the same procedure as in the fourth embodiment, and the communication service has started. Suppose. It is assumed that the value of the communication bandwidth assigned to each communication service is stored in each communication device. In FIG. 9, it is assumed that 3 Mbps is stored in the memory for the communication service between the user terminal 1 and the server 2. In addition, this communication service includes a user terminal 1, a communication path 103, a communication device 31, and a communication path 31.
2, communication device 32, communication path 324, communication device 41, communication path 412, communication device 42, communication path 425, communication device 5
The point that communication transmission is performed via the communication path 512, the communication device 52, and the communication path 522 is the same as in the fifth and sixth embodiments. Further, the communication bandwidth measuring device 14 is connected on the communication path 312, and the utilization communication bandwidth is periodically measured and the utilization communication bandwidth information 18 is transmitted to the communication device 32. It is similar to 6. In FIG. 9, the communication device 32 corresponds to the dynamic representative communication device.
In the present embodiment, the dynamic representative communication device corresponds to the communication bandwidth updating device. Further, in the present embodiment, the plurality of communication devices and the plurality of communication bandwidth measuring devices form a communication bandwidth management system.

In the present embodiment, it is assumed that the dynamic representative communication device (communication device 32) receives the used communication bandwidth information 18 in which the used communication bandwidth value is 5 Mbps. After receiving the used communication bandwidth information 18, the dynamic representative communication device (communication device 32) designates a communication service number and sends a transmission request message of free communication bandwidth information indicating a free communication bandwidth that can be further allocated at present. Send to all communication devices. When each communication device has allocated the communication bandwidth corresponding to the communication service number specified in the transmission request message to the communication path to be connected, it is not yet allocated yet As bandwidth information,
The point of notifying to the requesting dynamic representative communication device (communication device 32) is also the same as in the fifth embodiment. The dynamic representative communication device (communication device 32) collects all available communication bandwidth information related to this communication service, and then executes the process according to the flowchart of FIG. The communication bandwidth allocated to each communication device is 3 Mbps, the measured used communication bandwidth notified from the communication bandwidth measuring device 14 is 5 Mbps,
The maximum communication bandwidth value common to all communication services is 4 Mbp
s, the lower limit communication bandwidth is assumed to be 1 Mbps. The process of selecting the reset value of the present communication bandwidth will be described below with reference to the flowchart of FIG. 11 performed by the dynamic representative communication device. In the flowchart of FIG. 11, step S701
To S710 are the same as steps S501 to S510 in FIG. That is, the used communication bandwidth information indicating the used communication bandwidth of 5 Mbps is transmitted from the communication bandwidth measuring device 14 to the dynamic representative communication device (communication device 32), and the current allocated communication bandwidth is 3 Mbps. The dynamic representative communication device (communication device 32) recognizes that it is insufficient, and then acquires 2 Mbps as the minimum value of the free communication bandwidth information transmitted from another communication device. After adding this value to the current allocated communication bandwidth of 3 Mbps, the used communication bandwidth of 5 Mbps notified from the communication bandwidth measuring device 14
As compared to ps, 5 Mbps is selected as the first candidate for the updated assigned communication bandwidth. This 5 Mbps is selected by the processing up to step S709 or S710 in FIG. Since steps S701 to S710 are the same as those in the fifth embodiment, detailed description of the processing will be omitted.

After 5 Mbps is selected as the first candidate for the updated assigned communication bandwidth, steps S711 to S7 are performed.
The bandwidth range confirmation processing of the present embodiment is performed by the processing of 15, and will be described below. First, step S
In 711, the dynamic representative communication device (communication device 32)
Is the first candidate 5 of the selected assigned communication bandwidth after update.
Compare Mbs with the upper limit. If it is not smaller than the upper limit value, the upper limit value is reselected as the updated assigned communication bandwidth (S712). In this example, the upper limit value is 4 Mb
Since it is ps, it is 4 Mbps in the process of step S712.
Is selected. After that, this value is compared with the lower limit in step S713. If the updated assigned communication bandwidth is smaller than the lower limit value, the lower limit value is selected again as the updated assigned communication bandwidth (S714). In this case, since the lower limit value is 1 Mbps and the updated assigned communication bandwidth is 4 Mbps, it remains unchanged at 4 Mbps.

In this way, after confirming that the communication bandwidth is compatible with the range width, the updated allocated communication bandwidth of 4 Mbps is broadcast to all the communication devices. Each communication device that has received the broadcast message resets the communication bandwidth of the corresponding communication service number to the updated assigned communication bandwidth if bandwidth has already been allocated to this communication service. ..

As described above, according to the present embodiment, when setting the optimum communication bandwidth during execution of the communication service, unconditionally setting a large communication bandwidth or a small bandwidth. Since it is possible to set a communication bandwidth within a specific communication bandwidth value range, it is possible to allocate a fairer and more uniform communication bandwidth to each communication service when providing multiple communication services. It will be possible. In this example, a range check was performed using the upper and lower limits of the fixed communication bandwidth common to all communication services, but this limit value is dynamically changed by the administrator or dynamically changed depending on the communication usage status. Even if the change is made, there is no problem and the same effect can be expected. Further, even when the priority control of the communication service is performed as in the sixth embodiment, it is possible to set and control the upper limit value and the lower limit value of the communication bandwidth for each priority order, and the finer quality is high. It is possible to provide a fair communication service. Further, in the present embodiment, the distributed control method among a plurality of communication devices has been described. It is feasible and the same effect can be expected.

Here, the features of the communication bandwidth management system shown in the first to seventh embodiments will be restated below.

The communication bandwidth management system according to the first embodiment includes a plurality of network subsystems that form a network system, an integrated management apparatus that integrally manages the network subsystem management apparatus, and further each network subsystem. A plurality of communication control devices to configure,
A communication line connecting the communication control devices, a communication control device,
In a network system that is hierarchically formed by network subsystem management devices that manage communication lines, at the start of a communication service executed on this network, the communication bandwidth information of each sub-network is collected when this communication service is requested. , From the collected free communication bandwidth information, select and notify the maximum required common communication bandwidth across the sub-networks, notify each communication control device belonging to each sub-network, communication bandwidth of the communication line It is characterized by possessing a control function for setting and assigning common and efficient.

The communication bandwidth management system according to the second embodiment is a communication system which, when a communication service is started across a plurality of network subsystems on a network system, indicates a communication service type provided by the communication service. By adopting the method of selecting the communication bandwidth suitable for the attribute after receiving the notification of the service attribute information from the communication source device in advance, the integrated management device can be assigned to this communication service from each network subsystem. Collects the free communication bandwidth information of each sub-network system and the communication service attribute information of the communication source as the communication bandwidth information necessary for the appropriate provision of the communication service, and sends it from this collection information. Determine the maximum common communication bandwidth that can be allocated from the termination point to the reception termination point. By controlling the communication bandwidth for each network subsystem and, characterized in that to improve the dynamic response performance of the communication service by adjusting the excess capacity of the network.

The communication bandwidth management system shown in the third embodiment is a communication system which, when a communication service is provided across a plurality of network subsystems on a network system, indicates a communication service type provided by the communication service. By adopting the method of selecting the communication bandwidth suitable for the attribute after receiving the notification of the service attribute information from the communication source device in advance, the management devices of the multiple sub-networks perform the cooperative communication between the management devices. Then, each communication device needs to provide the available communication bandwidth information in each sub-network system that can be allocated to this communication service and the communication service attribute information of the communication source in order to properly provide the communication service. Collect as communication bandwidth information,
Based on this collected information, determine the maximum common communication bandwidth that can be allocated between the transmission end point and the reception end point, and control the communication bandwidth of each network subsystem in a distributed manner. By adjusting the surplus capacity of the network, the response performance of the communication service is dynamically improved.

The communication bandwidth management system according to the fourth embodiment is a communication system which, when a communication service is provided over a plurality of network subsystems on the network system, indicates the communication service type provided by the communication service. By adopting the method of receiving the communication of service attribute information from the communication source device in advance and selecting the communication bandwidth suitable for the attribute, each communication device in a plurality of sub-networks cooperates with each other. Information is transmitted by the communication device, and the available communication bandwidth information in each sub-network system that can be allocated to this communication service and the communication service attribute information of the communication source are appropriately provided by the communication device. It can be collected as the communication bandwidth information required for this purpose and can be allocated from the transmission end point to the reception end point from this collected information. By determining the maximum required common common communication bandwidth among the communication bandwidths and controlling the communication bandwidth of each network subsystem in a distributed manner, the surplus capacity of the network is adjusted to dynamically It is characterized by improving response performance.

The communication bandwidth management system according to the fifth embodiment periodically measures and accumulates the communication amount of each communication service when the communication service is provided over a plurality of network subsystems on the network system. By using a method that estimates the required communication bandwidth based on the result and selects the optimum communication bandwidth, the integrated management apparatus or the cooperation of each management apparatus of the sub-networks involved in multiple communication services belonging to the network , Or the required communication that was notified by measuring the communication bandwidth and traffic of each sub-network system assigned to this communication service through the cooperation of multiple communication devices belonging to multiple sub-networks involved in the communication service. Services are compared and bandwidth is dynamically updated periodically if excess bandwidth is allocated. By reducing reconfigure the width, characterized in that to improve the dynamic response performance of the communication service by adjusting the excess capacity of the network.

The communication bandwidth management system according to the fifth embodiment periodically measures and accumulates the communication amount of each communication service when providing the communication service over a plurality of network subsystems on the network system. By adopting the method of measuring the available communication bandwidth that can be additionally allocated and used at the same time according to the result and dynamically estimating the necessary and appropriate communication bandwidth and selecting the optimum communication bandwidth, In this situation, if it is determined that the communication bandwidth is insufficient by comparing the communication bandwidth of each sub-network system assigned to this communication service with this communication service notified by the traffic volume measurement, By periodically reconfiguring the communication bandwidth to which the available free bandwidth is added, the surplus capacity of the network is adjusted to dynamically improve the response performance of the communication service. Characterized in that to.

The communication bandwidth management system according to the sixth embodiment is a network system in which contents of communication services provided on this network by cooperation of an integrated management device or each sub-network management device or cooperation with an intra-network communication control device. According to the above, the communication service is evaluated at the time of request, and if the communication bandwidth required to realize the maximum response is not sufficient for the free communication bandwidth of each sub-network at the time of request, it has already been used and is currently in use. Gather information on the allocated communication bandwidth of other communication services with lower priority than the requested communication service, reduce the allocated communication bandwidth of the communication service with lower priority, and recalculate the communication bandwidth that can be drawn, Add the communication bandwidth that can be drawn from the communication service with low priority to the free communication bandwidth, and then A communication band that determines the same communication bandwidth across two sub-networks and uses the communication bandwidth of a communication service with a lower priority that has already been allocated to the communication bandwidth of a communication service with a higher priority. It is characterized by having a width re-allocation control control function.

The communication bandwidth management system according to the seventh embodiment periodically measures the communication volume of each communication service when the communication service is provided over a plurality of network subsystems on the network system. In a situation in which the available communication bandwidth that is additionally allocated and used at a certain time is measured and the necessary and appropriate communication bandwidth is dynamically estimated to adopt the method, If it is judged that the communication bandwidth is insufficient by comparing the communication bandwidth and this communication service notified by the traffic volume measurement, communication with free bandwidth available periodically and dynamically is added. In order to ensure fairness of each communication service when resetting the bandwidth, the range of assignable communication bandwidth common to all communication services is set in advance and the communication bandwidth is set within this range. And performing allocation control of the bandwidth.

In the first to seventh embodiments, the communication bandwidth management system according to the present invention has been described. However, the present invention has the same processing procedure as that shown in the first to seventh embodiments. A communication bandwidth management method can also be realized.

[0087]

As described above, according to the present invention, even when the communication bandwidth varies among the constituent routes in the data communication route used for data communication, the same allocation is common to all the constituent routes. To set the communication bandwidth,
It is possible to reduce the possibility that a wide communication bandwidth that is not used is generated, and it is possible to effectively use the communication bandwidth.

As described above, according to the present invention, the required communication bandwidth required for data communication is detected even when the communication bandwidth varies among the constituent routes in the data communication path used for data communication. Since the same assigned communication bandwidth is set for all the constituent paths, it is possible to effectively use the communication bandwidth by reducing the possibility of generating a wide communication bandwidth that is not used. .

As described above, according to the present invention, after the allocated communication bandwidth estimated to be optimum before the start of the data communication is set in the related constituent route, the used communication bandwidth is monitored when the data communication is executed.・ It is possible to evaluate and dynamically reconfigure the allocated communication bandwidth to suit the usage situation, and it is possible to effectively utilize the communication bandwidth by dynamically adjusting the data communication execution time. .

As described above, according to the present invention, after the allocated communication bandwidth estimated to be optimum before the start of the data communication is set in the related constituent route, the used communication bandwidth is set when the data communication is executed. It is possible to monitor and evaluate and dynamically reconfigure the allocated communication bandwidth to suit the usage. When performing the resetting of the assigned communication bandwidth, not only the free communication bandwidth but also the resources that are dynamically assigned in order to set the assigned communication bandwidth with a low priority as the reset target are expanded, and It becomes possible to effectively reset the allocated communication bandwidth, and the quality of communication service is improved.

As described above, according to the present invention, when resetting the allocated communication bandwidth estimated to be optimum during execution of data communication, unconditionally setting a large communication bandwidth or a small bandwidth. It is possible to set the communication bandwidth within a specific communication bandwidth value range without doing so, so when providing multiple communication services, allocate a fairer and more uniform communication bandwidth to each communication service. Is possible.

[Brief description of drawings]

FIG. 1 is a network configuration diagram illustrating communication bandwidth control according to a first embodiment.

FIG. 2 is a flowchart for explaining communication bandwidth control according to the first embodiment.

FIG. 3 is a network configuration diagram for explaining communication bandwidth control according to the second embodiment.

FIG. 4 is a flowchart for explaining communication bandwidth control according to the second embodiment.

FIG. 5 is a network configuration diagram for explaining communication bandwidth control according to the third embodiment.

FIG. 6 is a flowchart for explaining communication bandwidth control according to the third embodiment.

FIG. 7 is a network configuration diagram illustrating communication bandwidth control according to the fourth embodiment.

FIG. 8 is a flowchart for explaining communication bandwidth control according to the fourth embodiment.

FIG. 9 is a network configuration diagram for explaining communication bandwidth control according to the fifth, sixth and seventh embodiments.

FIG. 10 is a flowchart for explaining communication bandwidth control according to the fifth and sixth embodiments.

FIG. 11 is a flowchart for explaining communication bandwidth control according to the seventh embodiment.

FIG. 12 is a network configuration diagram for explaining a conventional technique.

[Explanation of symbols]

1 user terminal, 2 server, 3 sub-network,
4 sub-network, 5 sub-network, 6 management device, 7 management device, 8 management device, 9 integrated management device, 14 communication bandwidth measuring device, 15 communication bandwidth measuring device, 16 communication bandwidth measuring device, 18 used communication band Width information, 22 required communication bandwidth information, 31 communication device,
32 communication devices, 41 communication devices, 42 communication devices, 5
1 communication device, 52 communication device, 103 communication path, 31
2 channels, 324 channels, 412 channels, 425
Communication path, 512 communication path, 522 communication path.

Claims (25)

[Claims] 1. A communication bandwidth management system configured to include a plurality of constituent paths and managing a communication bandwidth of a data communication path used for predetermined data communication, wherein the assignable communication band is allocatable to the data communication. The allocable communication bandwidth information indicating the width is acquired for each constituent route, and based on the acquired allocable communication bandwidth information of each constituent route, a predetermined communication bandwidth is used as the allocated communication bandwidth for the data communication. A communication bandwidth management system having a communication bandwidth setting device for setting a communication path. 2. The communication bandwidth setting device sets the minimum allocatable communication bandwidth among allocatable communication bandwidths of each constituent route indicated in the allocatable communication bandwidth information of each constituent route to the data communication. The communication bandwidth management system according to claim 1, wherein the communication bandwidth is assigned to the data communication path. 3. The communication bandwidth setting device acquires necessary communication bandwidth information indicating a necessary communication bandwidth necessary for the data communication, and the necessary communication bandwidth indicated by the acquired necessary communication bandwidth information. The minimum communication bandwidth of the bandwidth and the allocatable communication bandwidth of each constituent path indicated in the allocatable communication bandwidth information of each constituent path to the data communication path as the allocation communication bandwidth for the data communication. The communication bandwidth management system according to claim 1, wherein the communication bandwidth management system is set. 4. The communication bandwidth management system further comprises: a measuring device for measuring a used communication bandwidth of the data communication after starting the data communication; and a used communication bandwidth of the data communication from the measuring device. The available communication bandwidth information shown is acquired, and the available communication bandwidth information indicating the available communication bandwidth of each constituent route is acquired for each constituent route. 2. The communication bandwidth updating device that updates the assigned communication bandwidth based on the available communication bandwidth of and updates the assigned communication bandwidth to the data communication path. Communication bandwidth management system. 5. The communication bandwidth updating device compares the assigned communication bandwidth with the used communication bandwidth, and when the assigned communication bandwidth is equal to or greater than the used communication bandwidth, the used communication bandwidth is The communication bandwidth management system according to claim 4, wherein the width is set as the updated communication bandwidth. 6. The communication bandwidth updating device compares the assigned communication bandwidth with the used communication bandwidth, and when the assigned communication bandwidth is less than the used communication bandwidth, each of the constituent paths Of the free communication bandwidth of, select the minimum free communication bandwidth, comparing the total value of the selected minimum free communication bandwidth and the assigned communication bandwidth and the used communication bandwidth, and the total value The communication bandwidth management system according to claim 4, wherein a communication bandwidth having a smaller value among the used communication bandwidths is set as the updated assigned communication bandwidth. 7. The communication bandwidth setting device sets, in the data communication path, an assigned communication bandwidth to each data communication for a plurality of data communication with priorities set, and the communication bandwidth management system Further, for each of the plurality of data communications, a measurement device that measures the communication bandwidth used for each data communication after the start of each data communication, and a specific data communication of the plurality of data communications is designated as the designated data communication. , Obtaining available communication bandwidth information indicating the available communication bandwidth of the specified data communication from the measuring device, and allocating communication to data communication having a lower priority than the free communication bandwidth of each constituent route and the specified data communication. Adjustable communication bandwidth information indicating the bandwidth as adjustable communication bandwidth is acquired for each constituent route, and the assigned communication bandwidth of the specified data communication, the specified Communication bandwidth for updating the assigned communication bandwidth of the specified data communication based on the communication bandwidth used for data communication and the adjustable communication bandwidth of each constituent route, and setting the updated assigned communication bandwidth for the data communication route The communication bandwidth management system according to claim 1, further comprising a bandwidth updating device. 8. The communication bandwidth updating device compares an assigned communication bandwidth of the designated data communication with a used communication bandwidth of the designated data communication, and the assigned communication bandwidth of the designated data communication is the designated data. The communication bandwidth management system according to claim 7, wherein when the communication bandwidth is equal to or larger than the communication bandwidth used for communication, the communication bandwidth used for the designated data communication is set as the assigned communication bandwidth after updating. 9. The communication bandwidth updating device compares the assigned communication bandwidth of the designated data communication with the used communication bandwidth of the designated data communication, and the assigned communication bandwidth of the designated data communication is the designated data. When the communication bandwidth used is less than the communication bandwidth used, the minimum adjustable communication bandwidth is selected from the adjustable communication bandwidths of the respective constituent routes, and the selected minimum adjustable communication bandwidth and the specified data communication After comparing the total value of the assigned communication bandwidth and the used communication bandwidth of the designated data communication, the communication bandwidth of the smaller one of the total value and the used communication bandwidth of the designated data communication is updated. The communication bandwidth management system according to claim 7, characterized in that 10. The communication bandwidth updating device defines an upper limit value and a lower limit value for the updated assigned communication bandwidth, and sets the updated assigned communication bandwidth within the range of the upper limit value and the lower limit value. The communication bandwidth management system according to claim 4 or 7, wherein the communication bandwidth management system determines. 11. A communication bandwidth management system configured to include a plurality of constituent paths and managing a communication bandwidth of a data communication path used for predetermined data communication, each of which is at least one of the plurality of constituent paths. A plurality of management devices that manage one or more constituent routes and acquire allocatable communication bandwidth information indicating the allocatable communication bandwidth that can be allocated to the data communication for the constituent routes to be managed; Acquirable allocable communication bandwidth information about the plurality of constituent routes, based on the acquired allocable communication bandwidth information of the plurality of constituent routes, a predetermined communication bandwidth as the allocated communication bandwidth to the data communication, A communication bandwidth management system having an integrated management device for setting a data communication path. 12. The integrated management apparatus assigns the minimum assignable communication bandwidth of the assignable communication bandwidths of the respective constituent routes indicated in the assignable communication bandwidth information of the respective constituent routes to the data communication. The communication bandwidth management system according to claim 11, wherein the assigned communication bandwidth is set in the data communication path. 13. The integrated management device acquires required communication bandwidth information indicating a required communication bandwidth required for the data communication from any of the management devices, and is indicated in the obtained required communication bandwidth information. The minimum communication bandwidth of the required communication bandwidth and the assignable communication bandwidth of each constituent route indicated in the assignable communication bandwidth information of each constituent route is assigned as the communication bandwidth assigned to the data communication. The communication bandwidth management system according to claim 11, wherein the communication bandwidth management system is set on a data communication path. 14. A communication bandwidth management system configured to include a plurality of constituent routes and managing a communication bandwidth of a data communication route used for predetermined data communication, each of which is at least one of the plurality of constituent routes. The management device has a plurality of management devices that manage one or more constituent routes, and each management device provides allocatable communication bandwidth information indicating the allocatable communication bandwidth that can be allocated to the data communication for the constituent routes managed by the own device. Acquires and transmits the acquired allocatable communication bandwidth information to another management apparatus, and receives the allocatable communication bandwidth information acquired by another management apparatus from another management apparatus. A specific management device is designated as a representative management device among the above management devices, and the representative management device is configured to manage the assignable communication bandwidth information acquired by the own device and other management devices. A communication bandwidth management system, wherein a predetermined communication bandwidth is set in the data communication path as an assigned communication bandwidth for the data communication based on the assignable communication bandwidth information received from the device. 15. Among the plurality of management devices, the management device that has acquired the necessary communication bandwidth information indicating the necessary communication bandwidth necessary for the data communication is designated as the representative management device, and the representative management device is The required communication bandwidth indicated in the obtained necessary communication bandwidth information, the assignable communication bandwidth information obtained by the own apparatus and the assignment indicated in the assignable communication bandwidth information received from another management apparatus The communication bandwidth management system according to claim 14, wherein a minimum communication bandwidth of the available communication bandwidths is set in the data communication path as an assigned communication bandwidth for the data communication. 16. A communication bandwidth management system configured to include a plurality of constituent paths and managing a communication bandwidth of a data communication path used for predetermined data communication, the communication bandwidth management system being included in the data communication path, The communication device has a plurality of communication devices connected to at least one or more of the plurality of constituent routes, and each communication device is capable of allocating communication bandwidth for the data communication with respect to the constituent route connected to its own device. , And transmits the generated allocatable communication bandwidth information to another communication device, and receives the allocatable communication bandwidth information generated by the other communication device from the other communication device. However, in a predetermined case, a specific communication device among the plurality of communication devices is designated as a representative communication device, and the representative communication device is assigned by the own device. A predetermined communication bandwidth is set in the data communication path as an assigned communication bandwidth for the data communication based on the available communication bandwidth information and the assignable communication bandwidth information received from another management device. Communication bandwidth management system. 17. Among the plurality of communication devices, the communication device that has acquired the necessary communication bandwidth information indicating the necessary communication bandwidth necessary for the data communication is designated as the representative communication device, and the representative management device is The required communication bandwidth indicated in the acquired necessary communication bandwidth information, the assignable communication bandwidth information generated by the device itself, and the assignable communication bandwidth information received from another management device The communication bandwidth management system according to claim 16, wherein a minimum communication bandwidth among the communication bandwidths is set in the data communication path as an assigned communication bandwidth for the data communication. 18. The communication bandwidth management system further comprises a measuring device that measures a communication bandwidth used for the data communication after the data communication is started, and the measuring device is one of the plurality of communication devices. A communication device having a predetermined relationship is designated as a dynamic representative communication device, and the dynamic representative communication device acquires utilization communication bandwidth information indicating the utilization communication bandwidth of the data communication from the measuring device, and From the communication device, the free communication bandwidth information indicating the free communication bandwidth of each constituent route is received for each constituent route, The communication bandwidth management system according to claim 16, wherein the assigned communication bandwidth is updated and the updated assigned communication bandwidth is set in the data communication path. 19. The dynamic representative communication device compares the allocated communication bandwidth with the used communication bandwidth, and when the allocated communication bandwidth is equal to or larger than the used communication bandwidth, the used communication band 19. The communication bandwidth management system according to claim 18, wherein the width is set as the assigned communication bandwidth after updating. 20. The dynamic representative communication device compares the allocated communication bandwidth with the used communication bandwidth, and when the allocated communication bandwidth is less than the used communication bandwidth, each of the constituent paths Of the free communication bandwidth of, select the minimum free communication bandwidth, comparing the total value of the selected minimum free communication bandwidth and the assigned communication bandwidth and the used communication bandwidth, and the total value The communication bandwidth management system according to claim 18, wherein a communication bandwidth having a smaller value out of the used communication bandwidth is set as the updated assigned communication bandwidth. 21. The representative communication device sets, for a plurality of data communications having priorities set, an assigned communication bandwidth to each data communication in the data communication path, and the communication bandwidth management system further comprises: A communication device having a predetermined relationship with the measuring device among the plurality of communication devices, the measuring device measuring the used communication bandwidth of each data communication after the start of each data communication. Is designated as a dynamic representative communication device, and the dynamic representative communication device designates specific data communication among the plurality of data communications as designated data communication, and the measurement device uses the communication bandwidth of the designated data communication. Of the available communication bandwidth information indicating the available communication bandwidth of each constituent route from other communication devices and allocation to the data communication having lower priority than the specified data communication. The adjustable communication bandwidth information indicating the assigned communication bandwidth as the adjustable communication bandwidth is acquired for each constituent route, and the assigned communication bandwidth of the designated data communication, the used communication bandwidth of the designated data communication and each constituent route 17. The communication bandwidth management according to claim 16, wherein the assigned communication bandwidth of the designated data communication is updated based on the adjustable communication bandwidth, and the updated assigned communication bandwidth is set in the data communication path. system. 22. The dynamic representative communication device compares the assigned communication bandwidth of the designated data communication with the used communication bandwidth of the designated data communication, and the assigned communication bandwidth of the designated data communication is the designated data. 22. The communication bandwidth management system according to claim 21, wherein, when the communication bandwidth is equal to or larger than the communication bandwidth to be used for communication, the communication bandwidth to be used for the designated data communication is set as the updated allocated communication bandwidth. 23. The dynamic representative communication device compares the assigned communication bandwidth of the designated data communication with the used communication bandwidth of the designated data communication, and the assigned communication bandwidth of the designated data communication is the designated data. If the communication bandwidth used is less than the communication bandwidth used, the minimum adjustable communication bandwidth is selected from the adjustable communication bandwidths of the respective constituent routes, and the selected minimum adjustable communication bandwidth and the designated data communication After comparing the total value of the assigned communication bandwidth and the used communication bandwidth of the designated data communication, the communication bandwidth of the smaller one of the total value and the used communication bandwidth of the designated data communication is updated. 22. The communication bandwidth management system according to claim 21, wherein the communication bandwidth management system allocates the communication bandwidth. 24. The dynamic representative communication device defines an upper limit value and a lower limit value for the updated assigned communication bandwidth, and sets the updated assigned communication bandwidth within the range of the upper limit value and the lower limit value. The method according to claim 18 or 2, wherein the determination is made.
The communication bandwidth management system according to 1. 25. A communication bandwidth management method for managing a communication bandwidth of a data communication path configured by a plurality of constituent paths and used for predetermined data communication, wherein the assignable communication band is allocatable to the data communication. The allocable communication bandwidth information indicating the width is acquired for each constituent route, and based on the acquired allocable communication bandwidth information of each constituent route, a predetermined communication bandwidth is used as the allocated communication bandwidth for the data communication. A communication bandwidth management method characterized by setting a communication path.