JPS63294157A - System for selecting representative of plural stations - Google Patents

Abstract

PURPOSE:To attain representative selection including plural packet terminals decentralizedly housed in plural stations, by constituting a representative selection table including subscribers transmitted from other stations and selecting a packet terminal housed in its own station in accordance with the representative selection table. CONSTITUTION:A representative selection table transmitting means 102 provided in a packet exchange 100 adds packet terminals 500 and 600 respectively housed in other stations to call requesting signals and transmits the signals to either of the packet exchanges 200 and 300 of the other stations housing the terminals 500 and 600, when the packet terminal 400 housed in its own station contained in a representative selection table 101 cannot receive an incoming call. The representative selection table receiving means 202 provided in the packet exchange 200 constitutes a representative selection table 201 including the packet terminals 500 and 600 contained in the call requesting signals received from the packet exchange 100 of another station and tries to receive the incoming call to the packet terminal 500 housed in the packet exchange 200 of its own station in accordance with the table 201. Therefore, a representative group including plural packet terminals decentralizedly housed in plural stations can be constituted.

Description

[Detailed Description of the Invention] [Summary] In a packet switching network, a representative selection table including packet terminals accommodated by the own station and packet terminals accommodated by other stations is configured, and the packet terminals accommodated by the own station included in the representative selection table are If the call cannot be received, the other station accommodating packet terminal included in the representative selection table is sent to the other station's bucket switch, a representative selection table including the subscribers transmitted from the other station is configured, and the call is automatically sent based on the representative selection table. By selecting a packet terminal accommodated in a station, it is possible to select a representative including a plurality of packet terminals distributed and accommodated in a plurality of stations.

[Industrial application field]

The present invention relates to a bucket switching network, and more particularly to a multi-station representative selection method that includes a plurality of packet terminals distributed and accommodated in a plurality of stations and enables representative selection.

In a bucket switching network, by assigning one representative number to a plurality of packet terminals accommodated in the same station and selecting the representative number, iM selects one packet terminal that can communicate from among the plurality of packet terminals. A representative selection service has been put into practical use.

・For example, multiple packages belonging to the same organization.
If the terminals are distributed over a wide area and it is possible to perform the desired communication with any packet terminal, the previous 1i1c may be used for multiple packet terminals that are distributed and accommodated in multiple stations. It is desirable that representative selection techniques such as the following be applied.

[Conventional technology]

FIG. 5 is a diagram showing an example of a conventional representative selection method,
FIG. 6 is a diagram illustrating the representative selection process in FIG. 5.

In Figures 5 and 6, the packet switch (PS)
1 and 2 are connected by trunk lines 4 and 5, forming a bucket switching network.

Packet terminals 7 and 8 accommodated in packet switch 2 and packet terminal 9 accommodated in packet switch 3
and 10 belong to the same organization,
The desired communication is possible with any one terminal.

In such a case, the packet terminals 7 and 8 accommodated in the packet switch 2 constitute a representative group, and the subscriber number N] assigned to the packet terminal 7 is defined as the representative number. The packet terminals 9 and 10 also constitute a representative group, and the subscriber number N3 assigned to packet terminal 9 is defined as the representative number.

In such a case, the central processing system (CP) 22 constituting the packet exchange a2 has the subscriber number N of the packet terminal.
1 and the subscriber number N2 assigned to the packet terminal 8 is provided corresponding to the representative number N1. , a representative JZ number table 321 including the subscriber number N3 of the packet terminal 9 and the subscriber number N4 assigned to the packet terminal IO is provided corresponding to the representative number N3.

In FIGS. 5 and 6, when the packet terminal 6 accommodated in the packet switch 1 desires to communicate with any of the packet terminals 7, 8, 9, and 10, it first communicates with the packet switch 2. In order to attempt communication with either of the accommodated packet terminals 7 and 8, the representative number N is
A call request packet CR (N1) containing "l" is transmitted to the packet switch 1.

The packet switch 1 analyzes the subscriber number N1 included in the call request packet CR(Nl), and if it determines that the relay line 4 is the transmission route, the packet switch 1 switches the network corresponding to the call request packet 7l-CR(Nl). An internal call request page, 1.CR' (Nl), is constructed and transmitted to the trunk line 4.

In the packet switch 2, the central processing system unit 22 receives the intra-network call request packet CR' arriving from the trunk line 4.
(Nl) via the line control unit (LCU) 23, analyzes the subscriber number N1 included in the intra-network call request packet CR"(N1), and determines whether it is the representative number corresponding to the representative selection table 221. , and is included as the subscriber number N1 of the bucket terminal, first, the packet terminal 7
If the communication is not possible, the other subscriber number N2 included in the representative selection table 221 is extracted, and the incoming call is sent to the baggage terminal 8 that is given the subscriber number N2. Determine whether or not it is possible.

If the packet terminal 8 is also unable to receive a call, the central processing system unit 22 configures a recovery request (packet service) CQ' in 117j in order to notify the packet terminal 6 that it is impossible to receive a call using the representative number N1. It is transmitted to the trunk line 4 via the line control device 23.

The packet switch 1 analyzes the intra-network restoration request packet CQ' arriving from the trunk line 4, and if it determines that it is to be sent back to the packet terminal 6, it composes a restoration request packet CQ and sends it back to the packet terminal 6.

The packet terminal 6 that has received the recovery request packet CQ uses the representative number N3 in order to attempt communication with either of the packet terminals 9 and 10 accommodated in the packet switch 3.
A call request packet CR (N3) containing the following is sent to the packet switch 1.

The packet switch 1 analyzes the subscriber number N3 included in the call request CR (N3), and if it determines that the trunk line 4 is the transmission route, the packet switch Configuring a call request packet CR' (N3),
Send to trunk line 4. .

In the packet switch 2, the central processing unit (CP)
22 arrives from trunk line 4. Intra-network call request packet No. 1-C
R' (N3) is received via the line control device 23,
Analyzing the subscriber number N3 included in the intra-network call request (CR'(N3)) and determining that the trunk line 5 is the transmission route,
The received intra-network call request request (CR') (N3) is transmitted to the relay station 5 via the line control device 23.

At bucket exchange) 1a3, the central processing system unit 32 receives an intra-network call request packet cR' arriving from the trunk line 5.
(N3) via the line control unit (LCU) 31, analyzes the subscriber number N3 included in the intra-network call request packet CR'(N3), and determines whether it is the representative number corresponding to the representative selection table 321. , and is included as the subscriber number N3 of the packet terminal 9, first, the packet terminal 9
If the call cannot be received, another subscriber number N4 included in the representative selection table 321 is extracted, and it is determined whether the call can be received by the packet terminal 10 assigned the subscriber number N4. .

When the packet terminal 10 is able to receive a call, the central processing system unit 32 configures an intra-network connection completion packet CC'' (N4) to notify the packet terminal 6 that communication with the packet terminal 10 is possible. and transmits it to the trunk line 5 via the line control device 31.

The intra-network connection completion packet CC" (N4) is sent to the trunk line 5,
It is returned to the packet switch 1 via the bucket switch 2 and the trunk line 4.

The packet switch 1 analyzes the network connection completion packet CC' (N4) arriving from the trunk line 4, and if it determines that it is to be sent back to the packet terminal 6, it issues a connection completion packet CC' (N4).
C(N4) and sends it back to the packet terminal 6.

The packet terminal 6 that has received the connection completion CC (N4) recognizes that communication with the packet terminal 10 is possible, and executes communication with the packet terminal 10.

[Problems to be Solved by the Invention] As is clear from the above explanation, in the conventional multiple station representative selection method, the packet terminals 7 to 10 accommodated in the plurality of packet exchangers 2 and 3 are considered to be one representative group. Since it was not possible to select a representative group, the packet terminals 7 and 8 accommodated in the packet switch 2 constitute one representative group, and the packet terminals 9 and 10 accommodated in the packet switch 3 constitute one representative group. The packet terminal 6 that wishes to communicate with any of the packet terminals 7 to 10 must attempt to transmit for each representative group.
There was a problem in that the representative selection service provided by the packet switching network was limited.

[Means for solving problems]

FIG. 1 is a diagram showing the principle of the present invention.

In FIG. 1, reference numerals 100 to 300 indicate packet switching devices constituting a packet switching network, and reference numerals 400 to 600 indicate packet terminals that are distributed and accommodated in each of the packet switching devices 100 to 300.

101 is a representative selection table provided in the packet switch 100 according to the present invention, and 201 is a representative selection table provided in the packet switch 200 according to the present invention.

Reference numeral 102 denotes representative selection table transmitting means provided within the packet switch 100 according to the present invention.

Reference numeral 202 denotes representative selection table receiving means provided in the packet switch 200 according to the present invention.

[Effect]

Representative selection table 10 installed in the Baro-nod switchboard 100
1 includes a packet terminal 400 accommodated in the local exchange 100 and a packet terminal 500.600 accommodated in the other exchange 200.300.

Packet switch 1. When the packet terminal 400 accommodating the own station included in the representative selection table 101 cannot receive a call, the representative selection table transmitting means 102 provided in the OO sends a packet terminal 500 accommodating another station included in the representative selection table 101. .6
00 is added to the call request signal, and the packet terminal 500.6
00 is sent to either of the other packet exchanges 200 or 300 that accommodates the packet.

A representative selection table receiving means 202 provided in the Paqueso I/exchange 200 configures a representative selection table 201 including the packet terminals 500 and 600 included in the call request signal received from the other station packet switch 100. 201, the packet terminal 500 accommodates the own packet switch 200.
Try receiving a call.

Therefore, it is possible to construct a representative group that includes a plurality of packet terminals distributed and accommodated in a plurality of stations, and the scope of application of the representative selection service provided by the packet switching network is expanded.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram showing a multi-station representative selection method according to an embodiment of the present invention, FIG. 3 is a diagram without illustrating an intra-network call request bucket according to an embodiment of the present invention, and FIG. This is a diagram illustrating the process of representative selection tJ in FIG.

In FIG. 2, a representative selection table 1221 is provided as the representative selection table 101 in the central processing system (CP) + 22 constituting the packet switch 12, and a representative selection table transmitter (TS) 1222 is provided as the representative selection table 101. A central processing system (CP) 132 provided as the selection table transmitting means 102 and configuring the packet switch 13 includes a representative jZ selection table receiving section i.
"R) 1322 books are provided as the representative selection table receiving means 202.

In FIG. 2, packet switching 411 (PS) II, 1
2 and 13 are connected by relay wires 15.1G and 17, forming a packet switching network.

Also, a packet terminal 19 accommodated in the packet switch 12 and given a subscriber number N5, a packet terminal 20 accommodated in the packet switch 13 and given a subscriber number N6 (=j), and a packet terminal 19 accommodated in the packet switch 14 , and the Bageso I terminal 21 to which the subscriber number N7 is given belong to the same organization, and the desired communication is possible with any of the packet terminals.

In such a case, the packet terminals 19, 20 and 21 constitute one representative group, and if the subscriber number N5 assigned to the packet node terminal 19 is defined as the representative number, then the central processing system unit 122 of the packet switch I2 , each packet terminal 1
9.20 and 21 subscriber numbers N5, N6 and N7
A representative selection table 1221 storing representative number N5 is provided corresponding to representative number N5.

In FIGS. 2 to 4, the packet terminal 18 accommodated in the parker 71/exchange i11 is the packet terminal 19.
If you wish to communicate with any of the following:
A call request packet cR(N5) containing the representative number N5 is transmitted to the packet switch 11.

The packet switch 11 sends a call request packet CR (N5
), the old subscriber numbers M and N5 included in trunk line 1 are analyzed, and trunk line 1 is
5 is determined to be the transmission route, the call request bagasso 1-CR (
An intra-network call request packet CR' (N5) as shown in FIG. Intra-network call request bucket cR” (
N5) has an intra-network header part ■] and a user part U,
The subscriber number N5 is included in the intra-network header section H.

In the packet switch 12, the central processing unit 122
The intra-network call request I-CR arrives from the trunk line 15.
'(N5) is received via the line control unit (LCU) 121, the subscriber number N5 included in the intra-network call request Baganoto CR' (N5) is analyzed, and the representative number corresponding to the representative selection table 1221 is selected. If it is determined that the packet terminal 19 is included as the subscriber number N5, it is first determined whether or not the packet terminal 19 can receive calls. The subscriber numbers N6 and N7 of the packet terminal 2 accommodated in the other station packet switch 13 or 14 are extracted and analyzed.
If it is determined that the transmission route corresponding to the subscriber number N6 is the subscriber number 0 or 21 and is the trunk line 16, the representative selection table transmitter 1222 is activated.

As shown in FIG. 3 (bl), the representative selection table transmitter 1222 sends the subscriber numbers N6 and N7 of the packet terminals 20 and 21 accommodated by other stations and the identification code PL indicating representative selection to the network header section H. In-network call request packet CR'(N
6, N7, PL) and transmits it to the trunk line 16 via the line control device 121.

In the packet exchange a13, the central processing system unit 132
An intra-network call request packet CR' arrives from the trunk line 15.
(N6, N7, PL) to line control unit (LCU) 131
, and an intra-network call request packet CR'' (N6
, N7, PL), the subscriber numbers N6 and N7 included in the intra-network header part H are identified.
The representative selection table receiving unit (TR) 1322 is activated.

The representative selection table receiving unit (TR) 1322 receives the representative selection table 1 from the subscriber numbers N6 and N7 included in the intra-network header section H of the intra-network call request packet CR' (N6, N7, PL).
After configuring the 321, the subscriber number N6 is first extracted and analyzed, and when it is identified as the subscriber number N6 of the packet terminal 20 accommodated in the own station line control device 131, it is determined whether or not a call can be received to the packet terminal 20. However, if the call cannot be received, then the subscriber number N7 included in the representative selection table 1321 is extracted and analyzed, and it is determined that it is the subscriber number assigned to the packet terminal 21 accommodated in the other station bucket switch 14. , further determines that the transmission route corresponding to the subscriber number N7 is the trunk line 17, and as shown in FIG. Configuring the call request request iCR", the line control device 13
1 to the trunk line 17.

In the packet switch 14, a central processing system unit (CP
) 142 receives the intra-network call request packet CR" (N7) arriving from the trunk line 17 via the line control unit (LCU) 141, and sends the intra-network call request packet CR" (N7)
When the subscriber number N7 included in the packet terminal 21 is analyzed and identified as the subscriber number N7 given to the packet terminal 21 accommodated in the local line control device 141, it is determined whether or not the packet terminal 21 can receive the call, and determines whether the call can be received. In this case, the central processing system unit 142 configures an intra-network connection completion CC' (N7) in order to notify the packet terminal 18 that it is possible to receive a call to the subscriber number N7, and 141 to the trunk line 17.

Network connection completion bucket) CC" (N7) is trunk line 17
, packet switch 13, trunk line 16, packet switch 1
2 and trunk line I5, the packet switch
) 11.

The packet switch 11 analyzes the network connection completion CC' (N7) arriving from the trunk line 15, and if it determines that it is to be sent back to the packet terminal 18, configures the connection complete CC' (N7). and sends it back to the packet terminal 18.

The packet terminal 18 that has received the CC (N7) (connection completion bucket) recognizes that it can communicate with the packet terminal 21, and executes communication with the packet terminal 2I.

As is clear from the above description, according to this embodiment, it is possible to configure a representative group including the packet terminals 19, 20 and 21 that are distributed and accommodated in the packet switches 12, 13 and 14. By attempting communication using subscriber number N5 as the representative number, communication with any of the packet terminals 19, 20 and 21 becomes possible.

Note that FIGS. 2 to 4 are merely examples of the present invention; for example, representative groups include packet terminals 19, 20 and 2 that are distributed and accommodated in packet switches 12, 13 and 14.
The present invention is not limited to the one configured by 1, and many other modifications may be considered, but the effects of the present invention remain the same in any case. It goes without saying that the packet switching network to which the present invention is applied is not limited to that shown in the drawings.

〔Effect of the invention〕

As described above, according to the present invention, in the packet switching network,
A representative group including a plurality of packet terminals distributed and accommodated in a plurality of stations can be configured, and the scope of application of the representative selection service provided by the packet switching network is expanded.

[Brief explanation of the drawing]

FIG. 1 shows M showing the principle of the present invention, FIG. 2 shows a multiple station representative selection system according to an embodiment of the present invention, and FIG.
are packet switches 11, 12 and 1 in FIG.
3 shows intra-network call request packets respectively sent by
4 is a diagram illustrating the representative selection process in FIG. 2, FIG. 5 is a diagram illustrating an example of a conventional representative selection method, and FIG. 6 is a diagram illustrating the representative selection process in FIG. In the figure, 1 to 3.11 to 14.100 to 30
0 is brush replacement m (PS), 4.5.15 to 1
7 is the middle m line, 6 to 10.18 to 21.400 to 6
00 is a packet terminal, 22.32.122.132 and 14.2 are central processing units (CP), 23.31.1
21131 and 141 are line control units (LCU),
101.201.221.321.1221 and 13
21 is a representative selection table; 102 is a representative selection table transmission means; 20
Reference numeral 2 denotes a representative selection table receiving means, 1222 a representative selection table transmitter (TS), and 1322 a representative selection table receiver (TR). Agent: Patent Attorney Makoto Igeta (Bi) (Eng) ■ (Shoulder)

Claims (1)

[Scope of Claims] In a packet switching network having a plurality of packet switches (100, 200, 300), a packet terminal (400) accommodated in the local packet switch (100) and a packet terminal (400) accommodated in the other station packet switch (200, 300)
), and a representative selection table (101) containing packet terminals (500, 600) accommodated in , each packet terminal (5) accommodating other stations included in the representative selection table (101).
00, 600) to the call request signal, and the other station packet switch (500, 600) that accommodates the packet terminal (500, 600)
200, 300), and the packet terminal (500, 600) included in the call request signal received from the other station packet switch (100).
A representative selection table (201) including the representative selection table (201) is constructed, and the representative selection table (201)
A representative selection table receiving means (202) for attempting to receive a call to a packet terminal (500) housed in a local packet exchange (200) based on the method (201).