JPS6231235A - Circuit selection and control system for packet switching network - Google Patents

Abstract

PURPOSE:To prevent the operation of a belonging terminal from stopping due to the occurrence of a trouble on the network side by giving to a subscriber's number of the terminal belonging to the plural packet exchange stations unique master number in the network. CONSTITUTION:The subscriber's terminal number of the terminal 1 is taken for 1001234 consisting of a station number of 100 and a subscriber's number of 1234. The subscriber's terminal number of the terminal 2 is taken for the master number 5005678. When the outgoing terminal 1 requests a connection to the master number 5005678, the packet exchange station 100 analyzes the number of 5005678, and selects a relay line 12 or 14. If a subscriber's line 2a is troubled when the packet exchange station 200 selects the subscriber's line 2a, the packet exchange station 200 transfers the receiving packet to the packet exchange station 300 through a relay circuit 23 and selects the subscriber's line 2b, whereby the packet can be received by the subscriber.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a line selection control method for a packet switching network.

[Conventional technology]

Conventionally, subscriber terminals accommodated in packet switching centers include host converters, which are important terminals that play the core of online systems. In order to avoid outages as much as possible, transmission lines are installed to other packet switching centers, subscriber terminals are assigned to multiple switching centers, and subscriber terminal numbers are assigned to the packet switching center. It consisted of a subscriber number and a subscriber number assigned within the accommodating packet switching center.

[Problem to be solved by the invention]

Therefore, if a fault occurs in the 9 faulty lines of the exchange, the accommodated subscriber will be moved to the 9 lines of the exchange that can be used, and the subscriber's station number will change, so all communications of the subscriber will be There was a problem in that the connection procedure for the other party had to be changed.

[Means for solving problems]

According to the present invention, in a packet switching network, a unique master number is assigned within the packet switching network as the subscriber number of one subscriber terminal accommodated in a plurality of packet switching stations, and each packet switching station in the packet switching network provides a line selection control system characterized in that a route is selected to the subscriber terminal accommodating station according to the master number, and a line to the subscriber terminal is selected between the subscriber terminal accommodating stations.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing the configuration of a packet switching network showing an embodiment of the present invention. Packet switching center 100°200.300,4
00 is the trunk line 12゜14.42, 43, 23 respectively
The subscriber terminal 1 is connected to the packet switching center 100 via the subscriber line 1a, and the subscriber terminal 2 is double-attached to the packet switching centers 200 and 300 via the subscriber lines 2a and 2b. It is accommodated.

An example of operation will now be described assuming that the subscriber terminal number of the terminal operator is 1001234 consisting of station number 100° and subscriber number 1234, and the subscriber terminal number of terminal 2 is master number 5005678.

Packet switching center 100. and 400 separates the master number and controls route selection to the packet switching center 200 or 300.
0 accesses terminal 2 via either subscriber 2a or 2b.

Now, a case will be described in which a connection request is made to master number 5005678 with the originating terminal as 1. Packet switching center 100
analyzes 5005678 and selects trunk line 12 or 14. If trunk line 14 is selected, packet switching center 40
0 analyzes 5005676 and selects trunk line 42 or 43. If trunk line 42 is selected, packet switching center 2
00 analyzes 500567B, selects subscriber line 2a, and receives the call.

On the other hand, when the subscriber line 2a has a failure, the packet switching center 200
transfers the received packet to the packet switching center 300 via the relay line 23, selects subscriber 1p2b, and receives the call. Further, when the packet switching center 200 has a failure, the packet switching center 400 at the previous stage does not select the relay line 42 but selects the relay line 43 and sends the packet.

The call arrives at the exchange center 300.

〔Effect of the invention〕

As explained above, the present invention provides a unique master number within the network for the subscriber numbers of terminals belonging to and accommodated in a plurality of Nokkerato exchange offices, so that the subscriber numbers of the terminals belonging to and accommodated in a plurality of Nokkerato exchange centers are assigned a unique master number within the network. This has the effect of minimizing the influence of the communication partner (connection procedure) on the associated terminal.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a packet switching network and subscriber terminals accommodated therein, showing one embodiment of the present invention. 1...Subscriber terminal (subscriber terminal number...10
01234), 2...Subscriber terminal (Subscriber terminal number...5005678), 100.200,30
0,400...Packet switching center, 12.14.
42,43.23...Relay line, 2a...
...A subscriber line that accommodates the subscriber terminal 2 in the packet switching center 200, 2b...A subscriber line that accommodates the subscriber terminal 2 in the packet switching center 300.

Claims (1)

[Claims] In a packet switching network, a unique master number is assigned within the packet switching network as the subscriber number of one subscriber terminal accommodated in a plurality of packet switching centers, and each packet switching center in the packet switching network uses the master number. A line selection control system characterized in that a route is selected to the subscriber terminal accommodating station in accordance with the subscriber terminal accommodating station, and a line to the subscriber terminal is selected between the subscriber terminal accommodating stations.