JP4833685B2 - LAN system and automatic bandwidth allocation method - Google Patents

Description

  The present invention relates to a LAN system and an automatic bandwidth allocation method for automatically allocating the bandwidth of each end user in a host device accommodating a plurality of end users.

  A LAN (Local Area Network) system in which a subscriber line accommodation device, a collective device of the xDSL system, etc. are used as host devices, a lower device is used as an end user, for example, a terminal such as a personal computer, and a plurality of end users are connected to the host device. For example, as shown in FIGS. 3A and 3B, each of the host devices 31 connected to the upper line 30 such as an optical line is respectively connected via a plurality of lower lines 32 such as subscriber lines. It has a configuration in which user terminals 33-1, 33-2,... 33-n are connected. For example, assuming that n = 16 and the guaranteed bandwidth value of each lower line 32 is 50 Mbps, the upper line 30 requires a transmission band of 800 Mbps to guarantee the transmission band for each of 16 terminals. It will be. If the transmission bandwidth of the upper line 30 is 1 Gbps, an overall transmission bandwidth of 200 Mbps is generated. Therefore, when this 200 Mbps transmission band is averagely distributed to the terminals 33-1 to 33-n, the maximum usable transmission band of each of the terminals 33-1 to 33-n is 62.5 Mbps.

  3B shows a case where the upper apparatus 31 is provided with an L2 (layer 2) switch 41 and a maximum line speed determining unit 42 corresponding to the lower line 32. The L2 switch 41 is connected to the upper line 30. Transmission path switching control with the lower line 32 is performed, and the maximum line speed determination unit 42 determines a transmission speed corresponding to the terminal. For example, when the upper line 30 has a transmission band of 800 Mbps, the maximum transmission band corresponding to each terminal 33-1 to 33-n is 50 Mbps, and the maximum line speed determination unit 42 corresponding to each terminal 33-1 to 33-n is Each of them will set 50 Mbps.

  Also, in a LAN system in which a plurality of information processing devices are connected via a wireless line via a router and an access point, the access point sets the required bandwidth information in the header of the transfer data packet. Identify and transfer data packets that require a large bandwidth, such as video data, to allocate a large bandwidth based on the requested bandwidth information, and transfer data packets that do not require a large bandwidth, such as text data. A data transmission method that effectively uses a bandwidth by allocating a small bandwidth based on requested bandwidth information has been proposed (for example, see Patent Document 1).

In addition, when a plurality of communication terminals and a communication management apparatus that performs communication management including address conversion between them are connected by a line and the function of the communication management apparatus is stopped, a predetermined communication is performed with respect to the communication terminal of the communication partner. The number of test packets is transmitted, the number of return packets for this test packet is counted, and a means for adjusting the bandwidth based on the ratio of the number of return packets to the number of transmit test packets has been proposed (for example, Patent Documents) 2).
JP 2003-333050 A JP 2003-348145 A

  Conventionally, a transmission band between a plurality of end users and a host device is generally assigned to each end user by averaging the transmission band of the host line. In this case, for example, even if one terminal 33-1 in the terminals 33-1 to 33-16 (when n = 16) in FIG. When the transmission bandwidth of the line 30 is 800 Mbps, the transmission bandwidth of 50 Mbps averaged for each of the 16 terminals is allocated, and therefore the transmission bandwidth of 40 Mbps not used in the terminal 33-1 is useless. There is a problem.

  Therefore, it is conceivable to assign the transmission band to each of the terminals 13-1 to 13-n in the host apparatus 31 by setting the requested band information in the header of the packet as in the means shown in Patent Document 1. However, in this case, it is necessary to provide each terminal 13-1 to 13-n with a function of setting the requested bandwidth information for each packet, and thus practical application is difficult. Further, even if a desired transmission band is allocated to each of the terminals 13-1 to 13-n, there is a problem that an allocation unit is required so that the total transmission band does not exceed the maximum transmission band of the upper line 30. is there. Further, as shown in Patent Document 2, it is conceivable to apply a response means for allocating a transmission band according to the number of return packets from the terminals 13-1 to 13-n for the test packets. It is difficult to apply because it is not a bus-type system.

  The present invention solves the above-described conventional problems, and an object thereof is to allocate a transmission band corresponding to the maximum transmission capability of the terminal within the transmission band of the upper line.

  The LAN system of the present invention is a LAN system in which a plurality of end user terminals are connected to a host device connected to a host line via a lower line, and the host device has a maximum line speed with the terminal. A line speed determining unit to be determined; a band guarantee / limiter in which a bandwidth guarantee value or a bandwidth limit value corresponding to the terminal is set in advance corresponding to the transmission band of the upper line; and the terminal determined by the line speed determiner A speed comparison unit that compares the corresponding maximum line speed with the band guarantee value or band limit value set in the band guarantee / limiter, and the comparison result by the speed comparison unit, the band guarantee value or the band limit based on the maximum line speed. A speed control unit that updates and controls the bandwidth guarantee value or the bandwidth limit value of the bandwidth guarantee / limiter unit to the maximum line speed when the value is large.

  The speed control unit compares the maximum line speed corresponding to the terminal from the line speed determining unit with a band guarantee value or a band limit value set in the band guarantee / limiter unit, and transmits the higher-order line. A configuration for performing update control of the bandwidth guarantee value or the bandwidth limit value corresponding to each terminal so as to be within the bandwidth is provided.

  The automatic bandwidth allocation method according to the present invention is an automatic bandwidth allocation method in a LAN system in which a plurality of end user terminals are connected to a host device connected to a host line via a lower line, respectively. A line speed is determined, and the maximum line speed is compared with a bandwidth guarantee value or a bandwidth limit value set in the bandwidth guarantee / limiter, and the bandwidth guarantee value or the bandwidth guarantee value for a terminal having a large bandwidth limit value is compared. This includes updating the bandwidth limit value to the maximum line speed value and distributing the difference bandwidth guarantee value or bandwidth limit value to the bandwidth guarantee value or bandwidth limit value of another terminal.

  The automatic bandwidth allocation method of the present invention is a bandwidth automatic allocation method in a LAN system in which a plurality of end user terminals are connected to a host device connected to a host line through a lower line, respectively. A maximum line speed of each of all terminals connected via the lower line is determined, and a bandwidth guarantee value or a band limit value obtained by distributing the transmission band of the upper line to each of the terminals and the maximum line speed corresponding to the terminal. The bandwidth guarantee value or the bandwidth limit value for the terminal having a large bandwidth guarantee value or the bandwidth limit value is updated to the value of the maximum line speed, and the difference bandwidth guarantee value or the bandwidth limit value is set to the bandwidth of another terminal. This includes a process of distributing the guaranteed value or the bandwidth limit value.

  When a terminal, which is an end user, is connected to the host device via a plurality of lower lines, the host device assigns the bandwidth by dividing the transmission bandwidth of the host line on an average basis for each terminal. When a surplus bandwidth is allocated to the maximum transmission capacity, the surplus transmission bandwidth can be automatically allocated to other terminals, and the transmission bandwidth can be effectively used.

The LAN system of the present invention will be described with reference to FIG. 1. A LAN system in which terminals 13-1 to 13 -n, which are a plurality of end users, are connected to a host device 1 connected to a host line 10 through a lower line 12. In this case, the host device 1 includes a line speed determining unit 4 that determines the maximum line speed between the terminals 13-1 to 13-n, and a bandwidth guarantee in advance corresponding to the transmission band of the host line 10. A bandwidth guarantee / restriction unit 3 in which a value or a bandwidth limit value is set, a line aggregation unit 2 that aggregates the lower line 12 and connects the upper line 10, and a terminal 13-1 determined by the line speed determination unit 4 ~ 13-n compatible maximum line speed and the bandwidth guarantee value or bandwidth limit value set in the bandwidth guarantee / limiter unit 3 are compared, and the speed comparison unit 6 and the terminals 13-1 to 13- from the line speed determination unit 4 n maximum line speed and bandwidth The bandwidth guarantee value or bandwidth limit value set in the guarantee / restriction unit 3 is compared by the speed comparison unit 6, and the above-mentioned corresponding to each terminal 13-1 to 13 -n so as to be within the transmission band of the upper line 10. And a speed control unit 5 that performs update control of the bandwidth guarantee value or the bandwidth limit value .

In the automatic bandwidth allocation method of the present invention, automatic bandwidth allocation control in a LAN system in which terminals 13-1 to 13-n, which are a plurality of end users, are connected to the host apparatus 1 connected to the host line 10 through the lower line 12, respectively. In the method, the higher-level device 1 includes a line aggregation unit 2 that connects between the higher-level lines 10 and a band guarantee / limitation unit that sets a band guarantee value or a band limit value corresponding to the terminals 13-1 to 13-n. 3 is connected to the terminals 13-1 to 13-n and determines a maximum line speed corresponding to the terminals 13-1 to 13-n, a speed control section 5, and a speed comparison section. 6, the maximum line speed of each of the terminals 13-1 to 13 -n connected to the upper apparatus 1 via the lower line 12 is determined, and the transmission band of the upper line 10 is changed to the terminals 13-1 to 13-1. Bandwidth guarantee value distributed to each 13-n Is a band limiting value, the terminal 13-1 to 13-n compares the corresponding maximum line speed, bandwidth guaranteed or band limit for the terminal is larger bandwidth assurance value or band limit on the value of the maximum line speed updating, in which and including a process of distributing the bandwidth guaranteed or band limiting value of the difference in the bandwidth guaranteed value or band limiting values of other terminals.

  FIG. 1 is an explanatory diagram of Embodiment 1 of the present invention, in which 1 is a host device, 2 is a line aggregation unit, 3 is a bandwidth guarantee / limiter for performing bandwidth guarantee control or bandwidth restriction control, and 4 is a line speed determination unit. 5 is a speed control unit, 6 is a speed comparison unit, 7 is a speed information storage unit, 10 is an upper line, 12 is a lower line, 13-1 to 13-n are terminals such as personal computers, etc. It corresponds to a lower end user.

The line speed determination unit 4 determines the maximum transmission speed of the lower line 12 between the terminals 13-1 to 13-n by means of already known means such as negotiation. Note that this maximum transmission rate may change depending on various conditions such as the surrounding environment, and the version and function of the terminal may be changed. it can be obtained more transmission rate means. A transmission speed determined This ensures that the terminal 13-1 to 13-n corresponding maximum line speed. The maximum line speed is transferred to the speed information storage unit 7 and stored in correspondence with the terminals 13-1 to 13-n.

  The speed comparison unit 6 includes a maximum line speed corresponding to the terminals 13-1 to 13-n stored in the speed information storage unit 7, and a band guarantee value corresponding to the terminals 13-1 to 13-n by the band guarantee / limitation unit 3. Or, it is compared with the bandwidth limit value. The band guarantee value or the band limit value is, for example, means in which the transmission band of the upper line 10 is averagely divided for each of the terminals 13-1 to 13-n in the initial state and is not illustrated. Can be set. When the bandwidth guarantee value or the bandwidth limit value is larger than the maximum line speed as a result of comparison in the speed comparison unit 6, the speed control unit 5 reduces the bandwidth guarantee value or the bandwidth limit value to the maximum line speed. The reduced terminal value is transferred to the bandwidth guarantee / limiter 3 and distributed to other terminals to update the bandwidth guarantee value or the bandwidth limit value. If the bandwidth guarantee value or the bandwidth limit value is smaller than the maximum line speed, the transmission bandwidth corresponding to the terminal is limited by the bandwidth guarantee value or the bandwidth limit value by the bandwidth guarantee / limiter 3. When the bandwidth guarantee value or the bandwidth limit value is updated, the updated value is limited.

  FIG. 2 is a flowchart of the first embodiment of the present invention, in which terminals 13-1 to 13-n are connected to the host device 1 via the lower line 12, respectively, and the speed determination unit 4 supports each end user. That is, the maximum line speed is determined corresponding to the terminals 13-1 to 13-n (A1). In this case, as described above, the maximum line speed can be determined by the negotiation means. The maximum line speed corresponding to the terminal is transferred to the speed information storage unit 7 (A2) and stored for the terminal.

  Next, the speed comparison unit 6 compares the maximum line speed with the guaranteed bandwidth value or the limited bandwidth value set in the bandwidth guarantee / limiter 3 (A3). As a result of the comparison, the guaranteed bandwidth value or the restricted bandwidth value is larger than the maximum line speed (A4). The terminal is notified to the speed control unit 5, and the guaranteed bandwidth for the terminal by the bandwidth guarantee / restriction unit 3 The value or the bandwidth limit value is reduced to the maximum line speed (A5).

  For example, in FIG. 1, when the transmission bandwidth of the upper line 10 is 800 Mbps with respect to the terminals 13-1 to 13-16 (when n = 16), the bandwidth guarantee / limiter unit 3 first sets the lower line. 12, the guaranteed bandwidth value or the bandwidth limit value corresponding to each of the terminals 13-1 to 13-16 connected via the terminal 12 is set to 50 Mbps that is averagely distributed. The maximum line speed corresponding to the terminals 13-1 to 13-16 by the line speed determining unit 4 is, for example, 20 Mbps for the terminal 13-1, 50 Mbps for the terminals 13-2 to 13-4, and the remaining terminals 13-5. Assuming that 13-16 is 80 Mbps, the speed control unit 5 uses the band guarantee value or the band limit value in the band guarantee / limiter unit 3 for the terminal 13-1 based on the comparison result in the speed comparison unit 6. Is updated from 50 Mbps to 20 Mbps, and the guaranteed bandwidth value or the limited bandwidth value of 30 Mbps is thereby distributed to other terminals.

  In this case, 52 Mbps is allocated to the terminals 13-2 to 13-16, but the maximum line speed of the terminals 13-2 and 13-4 is 50 Mbps. Based on the result, the speed controller 5 does not change the guaranteed bandwidth value or the limited bandwidth value corresponding to the terminals 13-1 to 13-4 in the bandwidth guarantee / limiter 3. Further, since the maximum line speed of each of the other terminals 13-5 to 13-16 is 80 Mbps, an extra value of the guaranteed bandwidth value or the bandwidth limit value for the terminal 13-1 is assigned to the terminals 13-2 to 13-4. It distributes to the terminals 13-5 to 13-16 except. In other words, the guaranteed bandwidth value or the bandwidth limit value corresponding to the terminals 13-5 to 13-16 of the bandwidth guarantee / limiter 3 is updated to 52.5 Mbps by the speed control unit 5 and the excess transmission band is enabled. Can be used.

  In step (A4), for the terminals whose maximum line speed determined in step (A1) is larger than the guaranteed bandwidth value or the restricted bandwidth value, for example, the above-mentioned terminals 13-5 to 13-16, the bandwidth The guarantee / restriction unit 3 is restricted according to the updated 52.5 Mbps. Accordingly, the transmission band of the upper line 10 can be used effectively according to the capabilities of each of the plurality of terminals. Note that the bandwidth allocation process described above can be performed sequentially at the transmission start time of each terminal. For example, when all terminals are connected to the host device, the maximum line speed of all terminals is determined and set in advance. Compared with the guaranteed bandwidth value or the restricted bandwidth value, the bandwidth is increased by the process of accumulating the value with the guaranteed bandwidth value or the restricted bandwidth value larger than the maximum bandwidth, and distributing it to the terminals with the maximum bandwidth that is greater than the guaranteed bandwidth value or the restricted bandwidth value. The guaranteed bandwidth value or the restricted bandwidth value of the guarantee / restriction unit 3 can be updated for the terminal.

It is explanatory drawing of Example 1 of this invention. It is a flowchart of Example 1 of this invention. It is explanatory drawing of a prior art example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Host apparatus 2 Line aggregation part 3 Band guarantee / limitation part 4 Line speed determination part 5 Speed control part 6 Speed comparison part 7 Speed information storage part 10 Upper line 12 Lower line 13-1 to 13-n Terminal

Claims (2)

In a LAN system in which a plurality of end users are connected to a host device connected to a host line via a lower line, respectively.
The host device is a line speed determining unit that determines a maximum line speed with the terminal;
A bandwidth guarantee / limiter that sets a bandwidth guarantee value or a bandwidth limit value corresponding to the terminal in advance corresponding to the transmission bandwidth of the upper line;
A line aggregating unit that aggregates the lower lines and connects between the upper lines;
A speed comparison unit that compares the maximum line speed corresponding to the terminal determined by the line speed determination unit and a bandwidth guarantee value or a bandwidth limit value set in the bandwidth guarantee / limiter;
The maximum line speed corresponding to the terminal from the line speed determining unit and the band guarantee value or the band limit value set in the band guarantee / restriction unit are compared by the speed comparison unit, and the transmission rate of the upper line is within the band. And a speed control unit that performs update control of the bandwidth guarantee value or the bandwidth limit value corresponding to each terminal so as to be within a range. In an automatic bandwidth allocation control method in a LAN system in which a plurality of end-user terminals are connected to a host device connected to a host line via a lower line, respectively.
The host device connects the terminal with a line aggregating unit that connects between the host line, a band guarantee / limiter that sets a bandwidth guarantee value or a bandwidth limit value for the terminal, A line speed determining unit that determines a maximum line speed, a speed control unit, and a speed comparing unit, and determining a maximum line speed of each of the terminals connected to the host device via a lower line; A bandwidth guarantee value or a bandwidth limit value obtained by distributing the transmission bandwidth of the upper line to each of the terminals and the maximum line speed corresponding to the terminal are compared, and a bandwidth guarantee value for a terminal having a large bandwidth guarantee value or a bandwidth limit value or Including a process of updating the bandwidth limit value to the maximum line speed value and distributing the differential bandwidth guarantee value or bandwidth limit value to the bandwidth guarantee value or bandwidth limit value of another terminal.
An automatic bandwidth allocation method characterized by the above.

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