JPH024066A - System for selecting group line in packet switching network - Google Patents

Abstract

PURPOSE:To improve a transmitting ability by comparing the sum of the throughputs of the calls of a line group and the transmitting abilities of respective lines and selecting the line group having the largest spared capacity at the time of sending an incoming packet from a packet switching device to a packet terminal with the line group. CONSTITUTION:The incoming (CN) packet is sent from a packet switching device 1 through line groups 9-11 to a packet terminal 2. To the line groups 9-11, calls 12-16 having throughputs(ThP) 9.6-19.2kbps indicated in a drawing are set, respectively. The packet switching device 1 has a functional part 17 to read a ThP value decided by the comparison of the CN packet with an incoming acceptance (CA) packet, storing parts 4-8 of the sum of all call ThP values for the line groups 9-11, and storing parts 3-7 of transmitting abilities S1-S3 of the line groups 9-11. The ThP value read from the functional part 17 and sums SS1-SS3 of the ThPs indicated by the storing parts 4-8 are added 18. Transmitting spared capacities (S1-SS1)-(S3-SS3) are compared, and the line group having the largest spared capacity is selected.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a packet switching equipment (DCE) and a packet terminal (
The present invention relates to a group line selection method in a packet switching network when there is a group line consisting of multiple lines between DTEs.

[Conventional technology]

Conventionally, in this type of group line selection method, when incoming call (CN) packets are sent from the DCE to the DTE via the group line, the selection order of the lines for sending CN packets is predetermined, and the selected lines are When the remaining transmission capacity of the selected line is less than the throughput set in the CN packet, the line is selected in accordance with a determined selection order.

1' Problems to be Solved by the Invention] The conventional group line selection method described above searches for free lines in a predetermined order when sending CN packets from DcE to DT and E. For,
- In the packet switching system, which allows multiple channels to be set up on a line, it is not always the case that the busiest line is selected from among the lines that make up the group line. If you select one, there is a problem that it will take longer to send and receive data than if you select an available line.

[Means to solve the problem]

The group line selection method in packet switching of the present invention transmits a first throughput value determined by negotiation between an incoming call packet and an incoming call acceptance packet to a packet switching device connected to a packet terminal via a group line. a first means for reading; a second means for storing a sum of second throughput values of all calls set on each line constituting the group line; a third means for adding and updating the total sum of the second throughput values; and when sending the incoming call packet to the packet terminal via the group line, Rjf is determined for each line from the transmission capacity of the line; The sum of the second throughput values stored in the second means is subtracted to obtain a difference, and when there are multiple lines for which the obtained difference is greater than the throughput value set in the incoming call packet, and fourth means for selecting a line with the largest difference among the plurality of lines and transmitting the incoming call packet.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

Referring to a diagram showing an embodiment of the present invention, a packet switching equipment (DCE) 1 and a packet terminal (DTE) 2 are connected by a plurality of lines 9.10.1.1 constituting a group line. . Here, calls 1213.1.4 and 15.16 having the following throughputs have already been set up on lines 9 and 10.11 that constitute the group line, respectively.

Line 9: 9.6kbps + 19.2kbps (2 calls) Line 10: 9.6kbps (1:17-rule)
Line 11: 19.2kbps + 19.2kbps (2
The packet switching device 1 includes a throughput extraction function unit 17 that sells a throughput value determined by negotiation between a called (CN) packet and a called call acceptance (CA) packet from the facility field of the packet, and a group A memory section (SS1, SS2, SS3) 4,6.8 indicating the sum of throughput of all calls set on the corresponding line for each line 9,10.11 making up the line,
It has storage units 3, 5.7 indicating the transmission capacity for each of 0 and 11. The packet switching device 1 also has a throughput addition function section 18 that adds and updates the throughput value read out by the throughput reading function section 17 and each of the sums of throughput values indicated by the storage sections 4 and 6.8. Equipped with. Furthermore, the packet switching device 1
When sending a CN packet to the packet terminal 2, the line 9 is used.

Transmission surplus capacity of 10 and 11 (Sl-SSl)
, (S2-SS2), and (3B-SS3) and sends the CN packet to the line with the largest transmission capacity. In this example, the transmission capacity is 3
1=S2=33, CN via line 10
A packet (reference numeral 20 in FIG. 1) is sent.

〔Effect of the invention〕

As explained above, according to the present invention, when a packet switching device and a packet terminal are connected by a group line and a CN packet is sent from the packet switching device to the packet terminal, the By comparing the total throughput of the calls being used with the transmission capacity of each line, and sending the CN packet to the line with the most remaining transmission capacity (transmission capacity - total throughput), the transmission capacity of the group line can be used effectively. .

[Brief explanation of the drawing]

The figure is a configuration diagram showing an embodiment of the present invention. 1...Packet switching device, 2...Packet terminal, 3
゜57...Storage section indicating transmission capacity for each line, 4,6゜8...Storage section indicating total throughput for each line, 9
．． 10.11...Lines forming the group line, 12
．． 13, 14, 15.16...Call, ]7...Throughput reading function unit, 18...Throughput addition function unit, one line selection function unit.

Claims (1)

[Claims] a first means for reading a first throughput value determined by negotiation between an incoming call packet and an incoming call acceptance packet into a packet switching device connected to a packet terminal via a group line; a second means for storing the sum of second throughput values of all calls set on the line; and a third means for adding and updating the sum of the first throughput value and the second throughput value. When the incoming packet is sent to the packet terminal via the group line, the total sum of the second throughput values stored in the second means is subtracted from the transmission capacity of each line. If there are multiple lines for which the difference is greater than the throughput value set for the incoming packet, select the line with the largest difference among these multiple lines and process the incoming packet. A group line selection method in a packet switching network, characterized in that the group line selection method comprises a fourth means for transmitting data.