JPH04256251A - Representative number system in packet exchange - Google Patents

Abstract

PURPOSE:To eliminate the need for a redial request from a caller terminal and to reduce the processing time for communication path setting by delivering a call again to other terminal in a group when a called terminal having a representative number group rejects the arrival of a call. CONSTITUTION:A terminal equipment 102 rejects an incoming call packet 2 because of cognestion of, e.g., a traffic and sends a restoration request packet 3. A routing device 109 selects a called terminal equipment 103 or 104 other than the terminal equipment 102 among terminal equipments in a same group. A packet level controller 107 edits a destination according to a subscriber data of the received caller packet 1 for the terminal equipment 103 and sends a called packet 6 to the terminal equipment 103. The terminal equipment 103 receiving the called packet 6 sends a called reception signal to the routing device 109 via the packet level controller 107 and connects the terminal equipments 101,103 upon the receipt of the called reception signal to bring the state into the packet communication state.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a representative number system in a packet switching network.

0002

[Background Art] Conventionally, in this type of representative number system, when a packet network receives a recovery request packet for an incoming call packet from a terminal within a group, it sends a disconnection instruction packet to the originating terminal and terminates the call connection operation. It was supposed to happen.

FIG. 4 shows a conventional operating procedure. Terminal 101
makes a call request (S1), and when the packet switching device 100 receives a call to the terminal 102 (S2), the terminal 102 rejects the call (S3) and requests recovery to the packet switching device 100 (S4).

[0004] The packet switching device 100 instructs the terminal 101 to disconnect (S8), and also confirms restoration to the terminal 102. The terminal 101 confirms that the connection with the terminal 102 has been disconnected (S9). After confirming the disconnection with the terminal 102,
The terminal 101 makes a call request (11) again to the same group 103.

[0005] The packet switching device 100 receives this incoming packet to the terminal 103 (S12), and the terminal 103
Sends an incoming call acceptance signal to the packet switching device 100 (S
13). The packet switching device 100 connects the terminals 101 and 103 to establish communication.

[0006]

[Problems to be Solved by the Invention] In the conventional representative number system described above, if the terminal is in a normal state, it is not possible to transfer the call to another terminal within the same group due to the circumstances of the receiving terminal. It was necessary to request a call to another terminal within the terminal. Therefore, when an initial call request is rejected, it is necessary to disconnect the call request and set up a communication path for a re-call request.

[0007] An object of the present invention is to: When a call is rejected,
The object of the present invention is to provide a representative number system in a packet switching network that allows calls to arrive at other terminals within the same group without disconnecting the call request.

[0008]

[Means for Solving the Problems] The representative number system in the packet switching network of the present invention is based on the CCITT recommendation X25 terminal (
In a packet network that accommodates multiple devices (hereinafter referred to as terminals),
The packet switching device constituting the packet network is provided with a memory for recording representative number group subscription information as part of subscriber data corresponding to each of the terminals, and this subscriber information is added when a packet is sent or received. a packet level control subsystem that edits the destination of the packet; and a routing that selects the destination of the packet according to the representative number group membership information attached to the outgoing or incoming packets sent from each of the packet level control subsystems. When the first called terminal rejects the call and sends out a recovery request packet, the first called terminal rejects the call and sends out a recovery request packet, which is sent according to the representative number subscription information added to the outgoing packet by the packet level control subsystem corresponding to the calling terminal. 1st
The packet level control subsystem corresponding to the receiving terminal refers to the memory provided and obtains representative number subscription information of the second, third, ..., nth receiving terminals that are in the same group as the first receiving terminal. The second incoming packet belonging to the same representative number group is assigned to the rejected incoming packet and sent back to the routing subsystem, and is assigned to the returned incoming packet in the routing subsystem.
, 3rd,..., nth receiving terminal is selected, and the packet level control subsystem accommodating this terminal edits the destination of the returned incoming packet and forwards it to the receiving terminal. It is characterized by

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a relay system diagram showing an embodiment of the present invention, in which terminals 102, 103, and 104 belong to the same representative number group. FIG. 2 is a diagram showing an example of an operation in which a receiving terminal subscribed to a representative number system service according to the present invention is reselected. An example will be shown in which the terminal 102 rejects the incoming call due to congestion or the like and transfers it to the terminal 103 in the same group.

[0011] In FIG. 1, the packet switching device 100 includes:
It has a memory (not shown) that stores representative number system subscription information as part of subscriber data, and is capable of editing packet destinations,
Packet level control devices 105, 106, 107, which are packet level control subsystems that request the routing device 109 to reselect the incoming terminal in response to the terminal's rejection of the incoming call;
108, and a routing device 109 which is a routing subsystem that selects a receiving terminal to which a packet is to be transferred from among the destination representative number groups.

Next, the operation will be explained with reference to FIGS. 2 and 3. First, the terminal 101 is connected to the terminal 102 as shown in FIG.
, 103, and 104 are sent out (S1). Packet switching device 10
0 receives this call request packet 1 at the packet level control device 105, selects the receiving terminal 102 from the destination representative number group at the routing device 109, and sends the call request packet 1 to the terminal 1.
The data is sent to the packet level control device 106 on the 02 side.

The packet level control device 106 edits the destination of the received calling packet 1 to the terminal 102, and sends it to the terminal 102 as an incoming calling packet 2 (S2). In response, the terminal 102 rejects the incoming call packet 2 due to, for example, traffic congestion (S3) and sends out a recovery request packet 3 (S4). Recovery request packet 3
The packet level control device 106 that received the call refers to a memory (not shown) to determine whether the terminals 103 and 104 are subscribed to the representative number service, recognizes that the terminals 103 and 104 are subscribed to the same group, and sends the called terminal A reselection request signal 4 is generated and sent to the routing device 109.

The routing device 109 selects a receiving terminal 103 or 104 other than the terminal 102 from among the terminals in the same group. As a result, the terminal 103 is selected and the calling packet 1 is transferred together with the subscriber data of the terminal 103 to the packet level control device 107 on the terminal 103 side. The packet level control device 107 edits the destination of the received calling packet 1 to the terminal 103 according to its subscriber data, and sends the incoming calling packet 6 toward the terminal 103 (
S5).

[0015] The terminal 103, which has received the incoming call packet 6, sends an incoming call acceptance signal to the routing device 109 via the packet level control device 107 (S6). Upon receiving the incoming call acceptance signal, terminal 101 and terminal 103 are connected (
S7) and enters the packet communication state.

[0016] When a recovery request is received from a terminal that has rejected an incoming call in this way, the calling terminal does not call again.
You can automatically transfer to other terminals within the same group.

[0017]

[Effects of the Invention] As explained above, the present invention enables, when a certain receiving terminal in a representative number group rejects a call, the other terminals in the group receive the call again. Since a re-call request is not required, the processing time for setting up a communication path can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention.

FIG. 2 is a diagram showing an example of the operation of the present invention.

FIG. 3 is a diagram showing the operating procedure of the present invention.

FIG. 4 is a diagram showing the operation procedure of a conventional example.

[Explanation of symbols]

100 Packet switching device 101, 102, 103, 104 Terminal 105,
106, 107, 108 Packet level control device 109 Routing device

Claims (1)

[Claims] Claim 1: In a packet network accommodating a plurality of CCITT Recommendation 1
A packet-level control subsystem that has a memory for storing subscriber information and edits the destination of packets when transmitting or receiving packets; a routing subsystem that selects a destination of the packet according to the representative number group subscription information attached to the packet, and transmits the packet according to the representative number subscription information attached to the outgoing packet by the packet level control subsystem corresponding to the originating terminal. When the first terminating terminal rejects the call and sends a recovery request packet, the packet level control subsystem corresponding to the first terminating terminal refers to the memory provided, and the first terminating terminal The representative number subscription information of the second, third,..., n-th receiving terminals that are in the same group as the group is added to the rejected incoming packet and sent back to the routing subsystem, and the routing subsystem The second, third, and third numbers belonging to the same representative number group assigned to the incoming packet
..., an arbitrary terminal is selected among the n-th receiving terminals, and the packet level control subsystem accommodating this terminal edits the destination of the returned incoming packet and transfers it to the receiving terminal. A representative number system for packet-switched networks.