JPH05219110A - Line selecting system - Google Patents

Abstract

PURPOSE:To average the using ratio of each subscriber's line in a group, and in addition, to shorten the delay time of data. CONSTITUTION:A packet switching device 1 is provided with a data quantity storage part 3 for storing each transmitted and received data byte number at every definite time of plural subscriber's lines 11 to 13 to a terminal A. At the time when a line to the terminal A is selected for transmitting and receiving the new data during communication between the terminal A and the terminal B, the data quantity storage part 3 is referred to by the packet switching device 1, and the line to show the minimum value of the transmitted and received data byte number is selected from among the subscriber's lines 11 to 13, and is connected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hunt group type line selection system in a packet switch.

[0002]

2. Description of the Related Art In the conventional line selection of the hunt group system, if one of the subscriber lines connecting the packet switch and the terminal cannot be used because it is in use or has a failure, the following specified line is selected. In the croup, it was a system to select one line at a time.

[0003]

In the former one of the above-mentioned conventional line selection methods, the next designated line cannot be selected unless one line is in an unusable state, and in the latter, the lines are sequentially selected one by one. Both have the drawback that the use of intra-group lines is not necessarily averaged since they are selected.

[0004]

A line selection system of the present invention has a plurality of subscriber lines for data transmission and reception between a first terminal and a packet switch to which the first terminal is connected. In a packet switching system that communicates with a second terminal on the other side by using these subscriber lines, a memory for storing the amount of transmitted / received data of each of the plurality of subscriber lines in the packet switch in a fixed time period. A table is provided, and when the subscriber line to the first terminal is selected for transmission / reception of new data during communication of the first and second terminals, the storage table is referred to and In this configuration, the subscriber line showing the smallest value is selected.

[0005]

The present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a packet switching system for explaining an embodiment of the present invention. As an example, the packet switching devices 1 and 2 are connected by a trunk line 31, and the packet switching device 1 has a terminal A. Are connected by subscriber lines 11, 12, 13 of the hunt group system, and the terminal B is connected by a subscriber line 21 to the packet switching device 2.
The packet switching device 1 includes a data amount storage unit 3 for storing the number of transmitted / received data bytes of each subscriber line at a constant time interval. FIG. 2 is a diagram showing the configuration of the data amount storage unit 3.

The operation will be described below. In FIG. 1, terminals A and B are communicating via subscriber lines 11 to 13, a packet switching device 1, a relay line 31, a packet switching device 2 and a subscriber line 21, and the packet switching device 1 is a subscriber line 11 The number of transmitted / received data bytes for each constant time is stored as shown in FIG.

When a line to the terminal A is newly selected for transmission / reception of data during this communication, the packet switching device 1
Refers to the data amount storage unit 3 and selects and connects the line with the smallest total number of memory bytes in this storage unit.

The data stored in the data amount storage unit 3 is erased when the communication between the terminals A and B is completed.

In this embodiment, there are a plurality of subscriber lines to the terminal A, but when there are a plurality of connection lines to the terminal B, the packet switching device 2 is provided with a similar data amount storage unit. , Can be processed in the same manner as described above.

[0011]

As described above, according to the present invention, in the hunt group system line, the packet exchange is provided with the storage table for storing the transmission / reception data amount of each of the plurality of subscriber lines at a constant time. To send and receive new data during communication with the terminal, refer to this storage table and select the line that shows the smallest amount of sent and received data to determine the usage rate of each subscriber line in the group. This has the effect of averaging and reducing the data delay time.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a packet switching system for explaining an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a data amount storage unit in FIG.

[Explanation of symbols]

 1, 2 packet switching device 3 data amount storage unit 11, 12, 13, 21 subscriber line 31 relay line A, B terminal

Claims (1)

[Claims] 1. A plurality of subscriber lines for data transmission / reception between a first terminal and a packet switch to which the first terminal is connected, and the other party's first line is used by using these subscriber lines. In the packet switching system for communicating with the second terminal, the packet switching device is provided with a storage table for storing the transmission / reception data amount of each of the plurality of subscriber lines at a constant time, and the first and second terminals. When selecting the subscriber line to the first terminal for transmission / reception of new data during the communication of, the storage table is referred to, and the subscriber line showing the smallest amount of transmitted / received data is selected. A line selection method characterized by: