JP6330249B2 - BAND ALLOCATION CONTROL DEVICE AND PROGRAM, CONCENTRATION POINT DEVICE, AND COMMUNICATION SYSTEM - Google Patents

Description

  The present invention relates to a bandwidth allocation control device and program, a line concentrator, and a communication system, and is applied to, for example, a wireless broadband network using a best-effort bandwidth type PON (Passive Optical Network) system for a backhaul network. To get.

  FIG. 8 is an explanatory diagram showing a configuration of a conventional wireless broadband network using a PON system for a backhaul network.

  The wireless broadband network 1 includes a plurality of wireless LAN (Local Area Network) 2, a best effort band PON system 3, and a relay network 4 that is a backbone network in the system. Each wireless LAN 2 includes one or a plurality of wireless terminals 5 and a wireless master station 6 that accommodates the wireless terminals 5. The best-effort band type PON system 3 includes an ONU (Optical Network Unit) 7 connected to the corresponding wireless master station 6 and an OLT (Optical) that is a line concentrator that accommodates a plurality of ONUs 7. Line Terminal (station side optical line terminating device) 8, and the OLT 8 connects to the relay network 4.

  In the best-effort bandwidth PON system 3, a dynamic bandwidth allocation (DBA; Dynamic Bandwidth Allocation) unit (see FIG. 1 described later) in the OLT 8 calculates a bandwidth to be allocated to each ONU 7 according to the DBA algorithm. (For example, refer to Patent Document 1).

JP 2007-129429 A

  By the way, in the conventional configuration, in the backhaul network (best effort band type PON system 3) that performs band allocation according to the DBA algorithm, the total traffic from each radio master station 6 exceeds the band of the backhaul network (congested). ), Bandwidth allocation is performed so that the bandwidth for each ONU 7 is equal. For this reason, when the number of wireless terminals 5 connected to each ONU 7 is different for each ONU 7, the bandwidth that can be used by each wireless terminal 5 is different, resulting in unfairness among wireless terminal users. there were.

  Japanese Patent Application Laid-Open No. 2004-133867 describes setting an allocated bandwidth to be assigned to each ONU according to a ratio of a maximum bandwidth limit value for each ONU determined according to a subscriber contract or the like. In the technology described in Patent Document 1, the communication terminal connected under the ONU is connected to the ONU by wire, and the maximum bandwidth limit value of the ONU does not change with time. On the other hand, in the case of the wireless broadband network 1 shown in FIG. 8, the wireless terminal 5 connected under the ONU 7 is a mobile terminal, so there is no concept of the maximum bandwidth limit value of the ONU 7, and the wireless terminal connected under the ONU 7 The number of 5 changes from moment to moment, and the technique described in Patent Document 1 cannot be applied.

  Therefore, a bandwidth allocation control device and program capable of allocating bandwidth so as not to give unfairness to users of communication terminals accommodated in different terminal accommodating devices, a concentrating point device, and a communication system Is desired.

The first aspect of the present invention is mounted on a concentrator point device that collects user data from a plurality of terminal accommodating devices accommodating one or a plurality of communication terminals and distributes user data to each of the terminal accommodating devices. In the bandwidth allocation control device that performs bandwidth allocation to each terminal accommodating device, (1) terminal connection number acquisition that acquires the number of terminal connections that is the number of communication terminals accommodated by each of the terminal accommodating devices. And (2) the number of terminal connections of each terminal accommodating apparatus when the communication band in the one or more communication terminals exceeds the allowable communication band between each terminal accommodating apparatus and the concentration point device. based on, and a bandwidth allocation means for determining the bandwidth allocation to each terminal accommodation apparatus in a predetermined state, (3) the number of terminal connections acquisition means, on which the bandwidth allocation control unit is mounted Data that passes through the concentrator point device, and a management device positioned above the concentrator point device monitors data for assigning identification information to the one or more communication terminals, and the management device detects the identification information. The number of terminal connections is acquired for each of the terminal accommodating devices by specifying the one or more communication terminals to which the terminal is assigned .

  According to a second aspect of the present invention, there is provided a concentrating point device that collects user data from a plurality of terminal accommodating devices accommodating one or a plurality of communication terminals and distributes user data to each of the terminal accommodating devices. 1 of the present invention is equipped with the bandwidth allocation control device of the present invention.

  The third aspect of the present invention collects user data from a plurality of terminal accommodating devices accommodating one or a plurality of communication terminals and the terminal accommodating devices, and distributes the user data to the terminal accommodating devices. In the communication system having the concentrating point device, the concentrating point device is the concentrating point device of the second aspect of the present invention.

A bandwidth allocation control program according to a fourth aspect of the present invention concentrates user data from a plurality of terminal accommodating devices accommodating one or a plurality of communication terminals and distributes user data to each terminal accommodating device. A computer installed in a bandwidth allocation control device that is provided in the point device and performs bandwidth allocation to each terminal accommodating device is (1) a terminal that is the number of the communication terminals accommodated by each of the terminal accommodating devices. A terminal connection number acquisition means for acquiring the number of connections; (2) when the communication band in the one or more communication terminals exceeds an allowable communication band between each terminal accommodating device and the line concentrator device; Based on the number of terminal connections of each terminal accommodating device, it functions as a bandwidth distribution means for determining bandwidth allocation to each terminal accommodating device in a predetermined state, and (3) obtains the number of terminal connections Stage is a data passing through the concentrator point apparatus to which the bandwidth allocation control unit is provided, the management apparatus located in an upper level of the concentrator point apparatus for assigning identification information to the one or more communication terminals The number of terminal connections is acquired for each of the terminal accommodating devices by monitoring the data and specifying the one or more communication terminals to which the identification information is assigned by the management device.

  ADVANTAGE OF THE INVENTION According to this invention, the bandwidth allocation control apparatus and program which can allocate a band so that it may not give unfairness to the user of each communication terminal accommodated in a different terminal accommodating apparatus, a concentrating point apparatus, and communication A system can be realized.

It is a block diagram which shows the principal part structure of the communication system of 1st Embodiment. It is a sequence diagram which shows the basic flow at the time of the radio | wireless terminal in the communication system of 1st Embodiment acquiring or releasing the IP address which self uses according to DHCP from a DHCP server. It is explanatory drawing of the information which the terminal connection number confirmation part in OLT of 1st Embodiment manages internally. It is a flowchart (the 1) which shows operation | movement of the terminal connection number confirmation part in OLT of 1st Embodiment. It is a flowchart (the 2) which shows operation | movement of the terminal connection number confirmation part in OLT of 1st Embodiment. It is a block diagram which shows the structure of the communication system of 2nd Embodiment. It is a block diagram which shows the structure of the communication system of 3rd Embodiment. It is explanatory drawing which shows the structure of the conventional wireless broadband network which uses the PON system for a backhaul network.

(A) First Embodiment Hereinafter, a first embodiment of a bandwidth allocation control device and program, a concentrator device, and a communication system according to the present invention will be described in detail with reference to the drawings. The communication system according to the first embodiment is a wireless broadband network that uses a best-effort bandwidth PON system for a backhaul network.

(A-1) Configuration of the First Embodiment FIG. 1 is a block diagram showing the main configuration of the communication system 1A of the first embodiment, which is the same as in FIG. Corresponding reference numerals are given.

  In FIG. 1, as for the N wireless master stations and ONUs, the wireless master station 6-1 and the ONU 7-1 are shown as representatives. Further, the wireless master station 6-1 shows a case where m wireless terminals 5-11 to 5-1m are accommodated at the present time.

  All of the wireless terminals 5, all of the wireless master stations 6 and all of the ONUs 7 are the same as those in the prior art, and their functional descriptions are omitted. In the case of the first embodiment, the OLT 8A which is the line concentrator device of the first embodiment is different from the conventional one.

  An installation example of each element of the communication system 1A is as follows. The OLT 8A is installed in a communication carrier building to connect to the relay network 4. On the other hand, the ONU 7 is installed in a store, a public facility, or outdoors that provides a wireless broadband service together with the wireless master station 6 in order to connect to the wireless master station 6. The wireless master station 6 is a wireless transmission terminal device for wireless broadband service, and is connected to subscriber wireless terminals such as smartphones, tablet PCs, notebook PCs, etc. by wireless transmission methods such as WiFi, WiMAX, and mobile phone wireless, and the network side Is connected to the ONU 7 by a wired interface (UNI).

  As shown in FIG. 1, the OLT 8A includes a PON physical layer processing unit (PON PHY) 11, a PON media medium access layer processing unit (PON MAC) 12, a bridge unit (BRIDGE) 13, an NNI media medium access layer process. Unit (NNI MAC) 14, NNI physical layer processing unit (NNI PHY) 15, DBA unit 16A, terminal connection number confirmation unit 17, and ONU-specific proportionality coefficient calculation unit 18.

  The PON physical layer processing unit 11, the PON media medium access layer processing unit 12, the bridge unit 13, the NNI media medium access layer processing unit 14 and the NNI physical layer processing unit 15 are the same as those of the existing OLT. That is, the PON physical layer processing unit 11 performs physical layer processing (for example, mutual conversion of electrical signals and optical signals) as the PON system OLT, and the PON media access layer processing unit 12 serves as the PON system OLT. MAC (Media Access Control) layer processing (for example, generation of GATE frame, transmission, reception of REPORT frame, analysis, etc.). The bridge unit 13 performs a process (such as a bridge function or a VLAN (Virtual LAN) function) that converts user data from a wireless terminal so as to correspond to a service type or device usage form provided by a carrier network related to a destination. Do. The NNI media access layer processing unit 14 performs MAC layer processing according to NNI (Network Network Interface) with the relay network 4, and the NNI physical layer processing unit 15 performs NNI with the relay network 4. MAC layer processing is performed.

  The DBA unit 16A basically sends each ONU according to the standby amount of the upstream user data of each ONU given from the PON media medium access layer processing unit 12 according to the DBA algorithm in the same manner as the existing one. A bandwidth is dynamically allocated, and the allocated bandwidth and transmission timing are notified to the PON media access layer processing unit 12.

  However, the DBA unit 16A of this embodiment is different from the conventional DBA unit in that the method of determining the bandwidth allocated to each ONU when the total traffic from each wireless master station exceeds the bandwidth of the backhaul network (congested). Is different. The DBA unit 16A of the embodiment uses the ONU-specific proportionality coefficient calculated by the ONU-specific proportionality coefficient calculation unit 18 when the sum of traffic from each wireless master station exceeds the allowable bandwidth of the backhaul network (congested). Accordingly, the bandwidth allocated to each ONU is determined.

  The terminal connection number confirmation unit 17 monitors (Snooping) user traffic exchanged between the wireless terminal 5 and the relay network 4 and determines the number of connections of the wireless terminals 6 for each ONU 7 (and therefore for each wireless master station 6). Detect. Examples of the target user traffic to be monitored include DHCP (Dynamic Host Configuration Protocol) traffic generated to acquire an IP address when the wireless terminal 6 is connected. A specific method of confirming the number of connections of the wireless terminal 5 in the terminal connection number confirmation unit 17 will be clarified in the section of operation description.

The ONU-specific proportionality coefficient calculation unit 18 calculates a proportionality factor for each ONU set in the DBA unit 16A based on the number of connections of the wireless terminals 6 for each ONU 7 confirmed by the terminal connection number confirmation unit 17. For example, the number of connections of the wireless terminal of ONU 7 -1~ONU 7 -N can if C1 to CN, according to equation (1), to calculate the proportional coefficient coef1~coefN per ONU.

  In the case of this embodiment, a partial configuration of the PON media medium access layer processing unit 12 (notifying the DBA unit 16A of the request transmission amount from the ONU included in the REPORT frame, or the bandwidth allocation given from the DBA unit 16A The DBA unit 16A, the terminal connection number confirmation unit 17 and the ONU-specific proportional coefficient calculation unit 18 constitute a bandwidth allocation control device. All or some of these components constituting the bandwidth allocation control device may be realized by a CPU and a program executed by the CPU, or may be realized by dedicated hardware.

(A-2) Operation of the First Embodiment Next, the bandwidth allocation control operation in the OLT 8A, which is a characteristic operation of the communication system 1A of the first embodiment, will be described.

  First, the operation of the terminal connection number confirmation unit 17 that is particularly characteristic in the bandwidth allocation control operation will be described.

  FIG. 2 is a sequence diagram showing a basic flow when the wireless terminal 5 acquires or releases an IP address used by the wireless terminal 5 from the DHCP server 9 existing in the relay network 4 or the like according to DHCP.

  When the wireless terminal 5 corresponding to the DHCP client wants to obtain an IP address or the like from the DHCP server 9, it broadcasts a DHCPDISCOVER message and makes an inquiry to the entire relay network 3. The DHCP server 9 that has received the DHCPDISCOVER message transmits a DHCPOFFER message to the wireless terminal 5 to notify information on an IP address that can be used by the wireless terminal 5. Next, if there is no problem with the IP address presented by the DHCP server 9, the wireless terminal 5 officially requests the DHCP server 9 to allocate an IP address using a DHCPREQUEST message. The DHCP server 9 that has officially assigned an IP address in response to the request transmits a DHCPACK message to the wireless terminal 5. The DHCPACK message also includes information on lease time of the assigned IP address (Lease Time).

  Further, when the assigned IP address is no longer necessary, the wireless terminal 5 transmits a DHCPRELEASE message to the DHCP server 9 to release the IP address setting.

  The DHCPDISCOVER message, DHCPOFFER message, DHCPREQUEST message, DHCPACK message, and DHCPRELEASE message described above pass through the OLT 8 interposed on the communication path. The terminal connection number confirmation unit 17 of the OLT 8 detects the number of connections of the wireless terminals 6 for each ONU 7 (and therefore for each wireless master station 6) while monitoring a DHCPACK message, a DHCPRELEASE message, and the like.

  As shown in FIG. 3, the terminal connection number confirmation unit 17 includes terminal number counters CNT-1 to CNT-N for each ONU 7-1 to 7-N and IP address management tables TBL-1 to TBL-N. And have. Each record (each row) of the IP address management tables TBL-1 to TBL-N includes an IP address assigned to a wireless terminal under the ONU and a lending end time when the lending of the IP address ends. .

  4 and 5 are flowcharts showing the operation of the terminal connection number confirmation unit 17, respectively. FIG. 4 is a flowchart relating to the monitoring of the DHCP message, and FIG. 5 is a flowchart relating to the elapse of the lending end time of the IP address.

  When there is user traffic passing through the bridge unit 13, the terminal connection number confirmation unit 17 starts the processing shown in FIG. 4 and determines (monitors) whether the user traffic is a DHCPACK message or a DHCPRELEASE message (S100, S101).

  If the user traffic is neither a DHCPACK message nor a DHCPRELEASE message, the terminal connection number confirmation unit 17 ends the series of processes shown in FIG.

  On the other hand, if the user traffic is a DHCPACK message, the terminal connection number confirming unit 17 counts the number of terminals related to the ONU 7-n (n is 1 to N) serving as the destination wireless terminal of the DHCPACK message. CNT-n is incremented by 1 (S102), a record is added to the IP address management table TBL-n to describe the IP address, and the lending end time calculated from the lending period is described (S103). The terminal connection number confirmation unit 17 starts recalculation for the ONU-specific proportionality coefficient calculation unit 18 (S104), and then ends the series of processes illustrated in FIG.

  If the user traffic is a DHCPRELEASE message, the terminal connection number confirmation unit 17 searches the IP address management table TBL-n in which the IP address released by the DHCPRELEASE message is described and searches for the IP address management table TBL. The corresponding record is deleted from -n (S105), and the terminal number counter CNT-n corresponding to the ONU 7-n related to the IP address management table TBL-n is decremented by 1 (S106). The terminal connection number confirmation unit 17 starts recalculation for the ONU-specific proportionality coefficient calculation unit 18 (S104), and then ends the series of processes illustrated in FIG.

  The wireless terminal 5 requests the DHCP server 9 to extend the lending period using the DHCPREQUEST message, and if the DHCP server 9 permits the extension, the wireless terminal 5 notifies the wireless terminal 5 of the extended lending period using the DHCPACK message. There is also. Although omitted in FIG. 4, if the monitored DHCPACK message is a period extension, the terminal connection number confirmation unit 17 records the IP address management table TBL-n in which the IP address related to the DHCPACK message is described. And the lending end time of the record is updated to a time determined by the extended lending period.

  For example, the terminal connection number confirmation unit 17 periodically starts the processing illustrated in FIG. And the terminal connection number confirmation part 17 searches whether the lending end time has already exceeded the record in all the IP address management tables TBL-1 to TBL-N (S200). When such a record is searched, the terminal connection number confirming unit 17 deletes the record from the corresponding IP address management table TBL-n (S201), and the ONU 7- related to the IP address management table TBL-n. The terminal number counter CNT-n corresponding to n is decremented by 1 (S202), and then the process returns to the search process in step S200.

  If a record whose lending end time has already exceeded is not searched, the terminal connection number confirmation unit 17 determines whether there is a record deleted in the current series of processes (S203). After starting recalculation for the unit 18 (S204), the series of processing shown in FIG. 5 is terminated. If not, the series of processing shown in FIG. 5 is immediately terminated.

  When the re-calculation is started from the terminal connection number confirmation unit 17, the ONU-specific proportionality coefficient calculation unit 18 converts all the terminal number counters CNT-1 to CNT-N in the terminal connection number confirmation unit 17 to ONUs 7-1 to 7-1. Taking the number of wireless terminal connections for each 7-N, the proportional coefficients coef1 to coefN for each of the ONUs 7-1 to 7-N are calculated according to the above-described equation (1) and set in the DBA unit 16A.

When the sum of traffic from each of the radio master stations 6-1 to 6-N exceeds the allowable maximum bandwidth BW _PON of the backhaul network (congested), the DBA unit 16A Based on the calculated proportional coefficients coef1 to coefN for the ONUs 7-1 to 7-N, a band is allocated to each ONU 7-1 to 7-N as shown in the equation (2).

(A-3) Effect of First Embodiment According to the first embodiment, when traffic from each of the radio master stations 6-1 to 6 -N is congested, the radio master stations 6-1 to 6-1. Since the bandwidth is allocated to the ONUs 7-1 to 7-N according to the number of wireless terminals CNT-1 to CNT-N connected to the 6-N, it is accommodated in any of the wireless master stations 6-1 to 6-N Even if it is done, the band allocated to each radio | wireless terminal 5 can be made substantially uniform. That is, it is possible to prevent unfairness between wireless terminals.

After substituting equation (1) into equation (2) as shown in equation (3) and dividing by the number of wireless terminals CNT-1 to CNT-N, each wireless master station 6-1 to 6-N The allocated bandwidth of each wireless terminal accommodated can be obtained, and from this equation (3), the bandwidth allocated to each wireless terminal 5 is determined regardless of which wireless master station 6-1 to 6-N is accommodated. It turns out that it has become almost uniform.

(B) Second Embodiment Next, a second embodiment of the bandwidth allocation control device and program, the concentrating point device, and the communication system according to the present invention will be described in detail with reference to the drawings. The communication system of the second embodiment is a wireless broadband network that uses a pair of opposed media converters.

  FIG. 6 is a block diagram showing a configuration of the communication system 1B of the second embodiment, and the same reference numerals are given to the same and corresponding parts as those in FIG. 1 and FIG.

  In FIG. 6, the line concentrator switch 22 collects user traffic from each of the radio master stations 6-1 to 6-N and sends it to the relay network 4, or sends user traffic from the relay network 4 side to each radio master station 6 It is a concentrating point device that distributes to -1 to 6-N. For example, a pair of media converters (MC) 20-1 to 20-N and 21-1 to 21-1 facing each other with the optical fiber interposed between the line concentrator switch 22 and the wireless master stations 6-1 to 6-N. Connected via a point-to-point line with 21-N. That is, in the case of the second embodiment, a wireless LAN backhaul network is constituted by the line concentrator switch 22 and the point-to-point line corresponding to the wireless master stations 6-1 to 6-N.

  In the case of the second embodiment, a bandwidth allocation control device 23 similar to the bandwidth allocation control device in the first embodiment is provided in the line concentrator switch 22.

  That is, the bandwidth allocation control device 23 confirms the number of connected terminals for each of the radio master stations 6-1 to 6-N according to the user traffic flowing through the line concentrator switch 22, and the radio master stations 6-1 to 6-6. Depending on the number of connected terminals for each N, a portion for calculating a proportionality coefficient to be applied when the concentrator switch 22 is congested, and a maximum bandwidth that can be handled by the concentrator switch 22 when the concentrator switch 22 is congested, And a portion to be distributed to each point-to-point line according to the proportionality coefficient.

  Therefore, according to the second embodiment, even when the line concentrator switch 22 is congested, it is possible to allocate the bandwidth equally (in other words, fairly) to each wireless terminal.

(C) Third Embodiment Next, a third embodiment of the bandwidth allocation control device and program, the concentrating point device, and the communication system according to the present invention will be described in detail with reference to the drawings.

  FIG. 7 is a block diagram showing a configuration of a communication system 1C according to the third embodiment, in which the same and corresponding parts as those in FIG. 1 and FIG.

  The communication system 1C according to the third embodiment is different from the communication system 1 according to the first embodiment in a method in which the OLT 8C obtains the number of connected wireless terminals. In the first embodiment described above, the number of wireless terminal connections for each of the wireless master stations 6C-1 to 6C-N is detected by monitoring user traffic that the OLT 8A passes. In the third embodiment, the OLT 8C acquires information related to the number of connected wireless terminals from the wireless master stations 6C-1 to 6C-N. This will be specifically described below.

  Each of the wireless master stations 6C-1 to 6C-N can bridge the user traffic from the accommodated wireless terminal and the user traffic to the accommodated wireless terminal appropriately. Between the wireless links and the wireless link) 30-1 to 30-N have MAC learning tables 31-1 to 31-N and are connected to the MAC learning tables 31-1 to 31-N. It automatically registers the MAC address of the wireless terminal. The wireless master stations 6C-1 to 6C-N of the third embodiment count the number of registered addresses of the MAC learning tables 31-1 to 31-N or the MAC learning tables 31-1 to 31-N. Terminal connection number transmission units 32-1 to 32-N that transmit the obtained number of wireless terminal connections are provided.

  On the other hand, the OLT 8C according to the third embodiment includes a terminal connection number reception unit 33 that receives information transmitted by the terminal connection number transmission units 32-1 to 32-N. The terminal connection number receiving unit 33 gives the received number of connected wireless terminals to the terminal connection number confirming unit 17 if the terminal connection number transmitting units 32-1 to 32-N transmit the number of wireless terminal connections. The terminal connection number receiving unit 33 receives the MAC learning tables 31-1 to 31-31 if the terminal connection number transmitting units 32-1 to 32-N transmit the MAC learning tables 31-1 to 31-N. The number of wireless terminal connections obtained by counting the number of registered N addresses is given to the terminal connection number confirmation unit 17.

  Here, the communication path and communication method from the terminal connection number transmitting units 32-1 to 32-N to the terminal connection number receiving unit 33 are not limited. For example, the number of wireless terminal connections (or MAC learning table) may be transmitted in-channel on the same line as user data. Further, for example, the number of wireless terminals connected (or the MAC learning table) may be transmitted out-channel via the device management network 34 having a network management device or the like.

  Also according to the third embodiment, even when the traffic from each of the wireless master stations 6-1 to 6-N is congested, it is possible to allocate the bandwidth equally (in other words, fairly) to each wireless terminal.

(D) Other Embodiments In the third embodiment described above, a modification in which a MAC learning table in a wireless master station is used is introduced to the first embodiment. On the other hand, you may make it introduce the modification of using the MAC learning table in a radio | wireless master station.

  In each of the above embodiments, the communication system in which the terminal is a wireless terminal is shown. However, the technical idea of the present invention can also be applied to a communication system in which all or part of the terminal is a wired terminal. In the case of such a modification, a router capable of accommodating wireless terminals can be applied as the terminal accommodating device.

  In each of the above-described embodiments, the calculation of the proportional coefficient applied when congestion occurs in the total traffic has been described. However, a predetermined proportional coefficient may be calculated even when congestion does not occur. For example, in the example of the first embodiment, congestion does not occur, but when bandwidth allocation exceeding a predetermined threshold is obtained from one or a plurality of ONUs, the number of wireless terminal connections of those ONUs is determined. Accordingly, a proportional coefficient that can determine the bandwidth allocated to the ONU may be calculated.

  DESCRIPTION OF SYMBOLS 1A, 1B, 1C ... Communication system, 5, 5-11 to 5-1m ... Wireless terminal, 6, 6-1 to 6-N, 6C-1 to 6C-N ... Wireless master station, 7, 7-1 to 7-N ... ONU, 8A, 8C ... OLT, 11 ... PON physical layer processing unit (PON PHY), 12 ... PON media medium access layer processing unit (PON MAC), 13 ... Bridge unit (BRIDGE), 14 ... NNI media Medium access layer processing unit (NNI MAC), 15... NNI physical layer processing unit (NNI PHY), 16 A... DBA unit, 17... Terminal connection number confirmation unit, 18. N, 211-1 to 21-N ... Media converter (MC), 22 ... Concentration switch, 23 ... Band allocation controller, 30-1 to 30-N ... Bridge unit, 31-1 to 31-N ... MAC learning table , 32- To 32-N ... the number of terminal connections transmitting unit, 33 ... terminal connection number receiving unit.

Claims (10)

It is mounted on a concentration point device that collects user data from a plurality of terminal accommodating devices accommodating one or a plurality of communication terminals and distributes user data to each of the terminal accommodating devices, to each of the terminal accommodating devices. In the bandwidth allocation control device that performs bandwidth allocation of
A terminal connection number acquiring means for acquiring a terminal connection number that is the number of the communication terminals accommodated by each of the terminal accommodating devices;
When a communication band in the one or more communication terminals exceeds an allowable communication band between each terminal accommodating device and the concentrating point device, a predetermined state is determined based on the number of terminal connections of each terminal accommodating device. A bandwidth distribution means for determining bandwidth allocation to each of the terminal accommodating devices in
The terminal connection number acquisition means is data passing through the concentration point device on which the bandwidth allocation control device is mounted, and a management device positioned above the concentration point device is connected to the one or more communication terminals. Monitoring the data for assigning the identification information, and identifying the one or more communication terminals to which the management device has assigned the identification information, thereby obtaining the number of terminal connections for each of the terminal accommodating devices. A bandwidth allocation control device characterized by the above. A calculation unit that calculates a ratio of the terminal connection number to the total terminal connection number for each of the terminal accommodating devices;
The band distribution means determines the band distribution for each of the terminal accommodating devices by multiplying the maximum band between the concentration point device and each of the terminal accommodating devices by the ratio. Item 4. The bandwidth allocation control device according to Item 1.   The terminal connection number acquisition means acquires the number of terminal connections for each of the terminal accommodating devices based on the number of MAC addresses of the communication terminals managed by the terminal accommodating devices. The bandwidth allocation control device according to claim 1 or 2.   4. The bandwidth allocation control according to claim 3, wherein the terminal connection number acquisition unit takes in information from each terminal accommodating apparatus transmitted by in-channel transmission using the same line as user data. apparatus.   4. The bandwidth allocation control device according to claim 3, wherein the terminal connection number acquisition unit takes in information from each terminal accommodating device transmitted by out-channel transmission via a device management network.   In the concentration point device which collects user data from a plurality of terminal accommodating devices accommodating one or a plurality of communication terminals and distributes user data to each of the terminal accommodating devices. A line concentrating point device comprising the band allocation control device according to any one of the above. A plurality of terminal accommodating devices accommodating one or a plurality of communication terminals, and a concentration point device that collects user data from each of the terminal accommodating devices and distributes user data to each of the terminal accommodating devices. In a communication system,
A communication system, wherein the concentration point device is the concentration point device according to claim 6.   The communication system according to claim 7, wherein a plurality of the terminal accommodating devices and the concentration point device are connected via a PON system.   8. The communication system according to claim 7, wherein each of the terminal accommodating devices and the concentration point device are connected via a point-to-point line. Concentrates user data from a plurality of terminal accommodating devices accommodating one or a plurality of communication terminals, and is provided in a concentration point device that distributes user data to each of the terminal accommodating devices. A computer installed in a bandwidth allocation control device that performs bandwidth allocation ,
A terminal connection number acquiring means for acquiring a terminal connection number that is the number of the communication terminals accommodated by each of the terminal accommodating devices;
When a communication band in the one or more communication terminals exceeds an allowable communication band between each terminal accommodating device and the concentrating point device, a predetermined state is determined based on the number of terminal connections of each terminal accommodating device. Function as a bandwidth allocation means for determining bandwidth allocation to each terminal accommodating device in
The terminal connection number acquisition means is data passing through the concentration point device provided with the bandwidth allocation control device, and a management device positioned above the concentration point device identifies the one or more communication terminals. Monitoring the data for assigning information, and specifying the one or more communication terminals to which the management device has assigned the identification information, thereby obtaining the number of terminal connections for each of the terminal accommodating devices. A characteristic bandwidth allocation control program.

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