JPH03258068A - Information transfer control system - Google Patents

Abstract

PURPOSE:To improve the quality of communication efficiently by connecting a sender terminal equipment and a transfer destination terminal equipment not through an exchange accommodating a relay terminal equipment. CONSTITUTION:Connection means 8, 10 provided to exchanges 1, 3 connect a terminal equipment 4 being a transfer sender and a terminal equipment 6 or 7 being a transfer destination in an optimum route based on information to specify the transfer sender from a transmission means 9 of an exchange 2 accommodating a terminal equipment 6 used as an attendant board when a transfer is executed to the terminal equipment 6 or 7 accommodated in the exchange 1 or 3. Thus, since the terminal equipment 4 being a transfer sender and the terminal equipment 6 or 7 are connected not through the exchange 2 accommodating the terminal equipment 5 executing the relay operation, the occupancy rate of a line or a trunk or the like is low, efficient processing is implemented and the deterioration of the sent information is reduced.

Description

[Detailed Description of the Invention] Table of Contents Overview Industrial Field of Application Conventional Technology Problems to be Solved by the Invention Means for Solving the Problems Implementation Example Outline of the Effects of the Invention Transmission control capable of transferring various information Regarding the information transfer control method in the communication network system configured by applying the protocol, the aim is to improve the efficiency of line usage and prevent communication quality deterioration. In a communication network system in which communication between the first terminal and the third terminal is possible due to a transfer operation by the second terminal to the third terminal during the communication between the first terminal and the second terminal, the first terminal at the time of the transfer operation providing a means for transmitting information identifying the third terminal to an exchange accommodating the second terminal in the exchange accommodating the second terminal, analyzing the information identifying the first terminal from the transmitting means;
A means for connecting the first terminal and the third terminal based on the information without going through the exchange in which the second terminal is accommodated is provided in the exchange in which the third terminal is accommodated, and after the transfer process is completed, the first The configuration is such that connection lines between the terminal and the second terminal, and between the second terminal and the third terminal are released.

Industrial Application Field The present invention is directed to a transmission control protocol (
For example, the present invention relates to an information transfer control method in a communication network system configured by applying CCITT-No. 7 common channel signaling method, etc.

For example, Mr. A, who uses telephone terminal a, wishes to talk to Mr. 8, who normally uses telephone terminal
Mr. 8 called a telephone terminal C that would be in the vicinity, but Mr. 8 was not present, and Mr. 8 could answer the telephone terminal C instead.
Suppose that Mr. 0, who knows , responds. In this case, Mr. 0 puts the line with telephone terminal a on hold, calls telephone terminal C, waits for Mr. 0's response, and goes off-hook.
and telephone terminal C are connected, allowing Mr. A and Mr. 8 to talk. Although the above is an example of a call between telephone terminals, similar transfer is possible for data communication between data terminals. In a communication network system equipped with such an information transfer function, there is a demand for reducing the occupancy rate of lines, etc. associated with transfer, and for improving the quality of transmitted information.

BACKGROUND ART FIGS. 19A to 19C are diagrams for explaining a conventional information transfer system in a communication network system (telephone switching system) to which the CCITT-No. 7 common line signaling system is applied.

In the same figure, 31.32 is a switch, and the switch 31
．． 32, although not shown in the figure, each includes a network (NW) accommodating subscriber terminals and trunks, a central control unit (CC), and a main memory (MM). The central control unit of each exchange 31,32 is connected by a common line signaling link that carries telephone exchange signals such as dialed numbers. 33.34.35.36 is the trunk (
TRK), 37 and 38 are lines connecting trunks 33 and 34 and trunks 35 and 36, 39 is a tone trunk for transmitting held music, a is a switchboard, and b and C are subscriber terminals.

A switchboard a housed in the switchboard 31, a terminal block 33, a trunk 33 and a line 3 housed in the switchboard 32.
7 (see figure (a)).

From this state, when switching board a performs a transfer operation to terminal C accommodated in switching equipment 32, the JA
An M signal (call setting request signal) is sent, and an ACM signal (confirmation signal) is sent from exchange 32 to exchange 31. In the exchange 31, the terminal is connected to a tone trunk 39 which notifies that the connected trunk 33 is on hold. Switchboard a is connected to terminal C and trunk 35.3.
6 and a line 38 (see figure (b)).

Next, a TRM signal (change signal) is sent from the exchange 31 to the exchange 32 via the common line signal link, and the exchange 31
At , the trunk 33 and the trunk 35 are connected, and the terminal C is able to communicate with the terminal C via the trunk 33, 34, 35, 36, line 37, 38, and exchange 31, 32 ((C) (see figure).

Problems to be Solved by the Invention As is clear from the above-mentioned conventional example, terminal C
Although they are accommodated in the same exchange 32, after the transfer operation they are connected via the exchange 31 in which exchange A is housed, so the lines and trunks between exchanges 31 and 32 are occupied, and the While this method is efficient, there is a problem in that it may lead to deterioration of communication quality. Especially the 19th
The configuration shown in the figure is a simple configuration for convenience of explanation, but it is generally configured with multiple exchanges, so the more relay exchanges there are, the higher the occupancy rate of lines, etc. , the quality of transmitted information also deteriorates significantly.

The present invention has been made in view of these points, and aims to improve the efficiency of use of lines and the like and prevent deterioration of communication quality.

Means for Solving the Problems FIG. 1 is a block diagram for explaining the present invention in detail. 1.2.3 is an exchange, and each exchange 1, 2.3 has multiple terminals (telephone terminal, data terminal, etc.) 4.5
．． It accommodates 6.7 mag.

The exchange 2 is equipped with sending means 9, and the exchanges 1 and 3 are equipped with connection means 8 and 10.

When the terminal 5 housed in the exchange 2 is used as a switchboard (a terminal that performs a transfer operation), the sending means 9 provided in the exchange 2 transmits information for identifying the sender to the transfer destination. The terminal 6 or 7 is sent to the exchange 1 or 3 in which the terminal 6 or 7 is accommodated, and the connection means 8.
10 is information for identifying the source from the sending means 9 of the exchange 2 in which the terminal 5 used as a switch board is housed, when a transfer is performed to the terminal 6 or 7 housed therein. Based on this, the terminal 4, which is the transfer source, and the terminal 6 or 7, which is the transfer destination, are connected through an optimal route.

In addition, instead of the above-mentioned sending means 9, a means 9' for sending the information for specifying the forwarding destination to the exchange 1 in which the sender terminal 4 is accommodated is used, and instead of the above-mentioned connecting means 8, it is used as a switching board. The sending means 9 of the exchange 2 which accommodates the terminal 5
The means 8' may connect the terminal 4, which is the transfer source, and the terminal 6 or 7, which is the transfer destination, by an optimal route based on the information for specifying the transfer destination from '.

Note that the configuration shown in FIG. 1 is a configuration shown for convenience of explanation, and the present invention is not limited to this configuration. Of course, other configurations may be used for the settings. Furthermore, since the terminal serving as the transfer source, the terminal used as a switchboard, and the terminal serving as a transfer destination are generally not fixed, it is desirable that each switchboard be provided with a sending means and a connecting means, respectively.

Operations FIGS. 2(a) to (C) show that in the configuration shown in FIG. FIG. 2 is an explanatory diagram when a transfer is performed to a terminal (transfer destination terminal) 6 accommodated in .

It is assumed that a source terminal 4 housed in the exchange 1 and a relay terminal 5 housed in the exchange 2 are in communication (FIG. (a)). From this state, at the relay terminal 5, the transfer destination terminal 6
When a transfer operation is performed on the exchange 2, the connection of the source terminal 4 to the relay terminal 5 is put on hold, and the relay terminal 5 is connected to the transfer destination terminal 6 (FIG. 3(b)). At this time, the sending means 9 of the exchange 2 sends information (
(station code, dial number, etc.) of the terminal 4 is sent.

This information is analyzed by the connection means 8 of the exchange 1, and it is detected that the transfer source terminal 4 is accommodated within itself, and the source terminal 4 and the transfer destination terminal 6 are connected within the exchange 1 and can communicate. (Figure (C)). Then, the lines used to connect the relay terminal 5, the source terminal 4, and the transfer destination terminal 6 are released.

Next, a case will be explained in which the terminal 4 housed in the exchange 1 is used as the source terminal, the terminal 5 housed in the exchange 2 is used as the relay terminal, and the data is transferred to the terminal (destination terminal) 7 housed in the exchange 3. do.

The sending means 9 of the exchange 2 sends information for identifying the originator (station code, dial number, etc. of the terminal 4) to the exchange 3 that accommodates the transfer destination terminal 7. It is analyzed by the connecting means 10 and the transfer source terminal 4
is detected to be housed in a switch other than itself,
As in normal processing, the optimal route is determined, and the terminal 7, which is the transfer destination, and the terminal 4, which is the source, are connected. Around this time, the lines used to connect the relay terminal 5, the source terminal 4, and the transfer destination terminal 7 are released.

It should be noted that the structure using the sending means 9' and the connecting means 8' can be easily inferred from the description of the structure using the sending means 9 and the connecting means 8, so the explanation thereof will be omitted.

As mentioned above, the source terminal 4 and the transfer destination terminal 6 or 7 are connected without going through the exchange 2 that accommodates the terminal 5 that performed the relay operation, so there are fewer lines, trunks, etc. than in the past. Since the occupancy rate is low and the number of relay exchanges is also reduced, deterioration in the quality of transmitted information can be reduced. In particular, when the exchange that accommodates the source terminal and the exchange that accommodates the relay terminal, and the exchange that accommodates the relay terminal and the exchange that accommodates the transfer destination terminal are connected via multiple other exchanges, etc. In the conventional transfer method, communication was performed using all of these exchanges and lines, but by adopting this method, the minimum number of exchanges and lines are required to connect the source terminal and the transfer destination terminal. This is extremely efficient as it only requires the line to be occupied.

Example Embodiments of the present invention will be described below with reference to the drawings.

First, an example of a communication network system suitable for applying the present invention will be described with reference to FIG. The figure is
CCITT=No, 7 An example of a communication network system (telephone switching system) based on the common line signaling system is shown.

In the figure, 11.12 is a switch, and the switch 11
．． 12 is a network (NW) I each accommodating subscriber terminals and trunks; 3. l 4. Central control unit (CC)
) 15.16 and main memory (MM) 17.18. 19°20.21.22,23.2
4 is trunk (TRK), 25.26 is trunk 19
20 and trunks 21 and 22 (CH
), 27 indicates a common line signal link (LK) for transmitting telephone exchange signals such as dialed numbers. Further, a indicates a switchboard, and b and C indicate subscriber terminals.

Subscriber terminals a and C are connected by using subscriber terminal A as the source terminal, calling switchboard a using this terminal, and performing a transfer operation to transfer destination terminal C at switchboard a. , which enables telephone calls.

Note that the exchange 1.2 in FIG. 1 corresponds to the above-mentioned exchanges 11 and 12, and the terminals 4 and 5.6 in FIG.
corresponds to each. In this embodiment, the sending means 9 or 9' and the connecting means 8 or 8' of FIG.
is assumed to be provided in each exchange, and its functions are realized by the central controller 15.16 executing a program stored in the main storage device 17.18.

Figures 3 (a) and 3) are diagrams showing the transfer process and state transition when the transfer destination terminal and the source terminal are accommodated in the same exchange (in the case of the configuration shown in Fig. 18). FIGS. 4(a) and 4(a) are diagrams showing transfer processing and state transition when the transfer destination terminal and the originating terminal are accommodated in different exchanges. In addition, the flowcharts shown in FIGS. 5 to 17 correspond to the CC in FIGS.
They correspond to processes (1) to α, respectively.

In addition, in FIG. 3 or 4, PICa, PICb,
PICc, POGa, POGb, and POGC indicate trunks, station A uses exchange 2 in FIG. 1 or exchange 12 in FIG. 18, station B uses exchange 1 in FIG. 1 or exchange 11 in FIG. 18, and station C correspond to the exchange 3 in FIG. 1, respectively.

First, refer to FIG. 3(a). It is assumed that terminal a accommodated in station A and terminal A accommodated in station B are already in communication (state shown at 1 in FIG. 3(a)). From this state, terminal a performs a transfer operation to terminal C accommodated in station B. When the operator hooks up and dials the special number and enters the specified input (step 30
1), the transfer process is started, and the CC process [1) shown in FIG. 5 is executed in station A. In other words, Pic through NW
Step 50: Connect the path of a and H3T (hold music).
1) Capture POGa (step 502).

Then, an IAM signal (call setup request signal) is sent to station B (step 503), and this process ends.

Returning to FIG. 3(a), station B that has received the IAM signal executes the CC process (2) shown in FIG. 6.

That is, in order to capture the extension to which terminal C is connected (hereinafter referred to as extension C), it sends RG (ringer) to extension C (step 602).
An RBT (ringback tone) is sent to ICb (step 603), an ACM signal (confirmation signal) is sent to station A (step 604), and this process ends.

At station A that received the ACM signal, C as shown in FIG.
C process (3) is executed. That is, the extension to which terminal a is connected (hereinafter referred to as extension a) and the path of POGa are bidirectionally connected through the NW (step 701), and this processing is completed. The state shown in (■) will be reached.

If terminal C responds (step 302), station B executes CC processing (4) shown in FIG. That is, step 801 is to stop sending RG to terminal C.
), release the RBT and PICb paths (step 80
2). The path between PICb and extension C is bidirectionally connected through the NW (step 803), and an ANN signal (response signal) is sent to station A (step 804), and this process ends. The processing up to this point results in the state shown in ■ in FIG. 3(a).

Next, refer to FIG. 3 et al. If terminal a is disconnected (step 303), station A executes CC processing (5) shown in FIG. In other words, PI through NW
Step 90: Connect the Ca and POGa paths in both directions.
1) Set the identification information and station code of the terminal in the additional information area of the RLO signal (transfer signal) Step 902)
, R'L○ signals are sent to station B, which is the transfer destination (step 903), and this process ends. The processing up to this point results in the state shown in ■ in FIG. 3(b).

Station B, which has received the RL◯ signal, executes CC processing [6] shown in FIG. That is, extract the station code of the additional information of the RL○ signal (step 1001), compare the station code of the additional information with the station code of your own station (station B) (step 1002), and if they are not the same, step 1006).
If they are the same, the process advances to step 1003. In this case, since the terminal C and the terminal C are accommodated in the same station B, the process advances to step 1003. In step 1003, the path between the extension (hereinafter referred to as extension b) and extension C to which the terminal is connected is bidirectionally connected through the NW, and PICb is released (step 1004). Then, R3C signal (release signal) from station B
is sent to station A (step 1005), and this process ends.

Station A that has received the R3C signal executes CC processing (7) shown in FIG. That is, PICa is released (step 1101), the R3C signal is sent from station A to station B (1102), and this process ends.

Station B, which has received the R3C signal, executes CC processing (8) shown in FIG. That is, POGb is released (step 1201), and this process ends. The processing up to this point results in the state shown in ■ in FIG. 3(b).

This state means that terminals housed in the same station B and terminal C are housed in the same station.
are in a state where they are connected only through the station B, and from now on, as far as this communication is concerned, communication can be performed regardless of the station A that accommodates the terminal a that performed the transfer operation.

Above, we have explained the case where the source terminal and the transfer destination terminal are accommodated in the same station.Next, with reference to FIG. 4,
Processing will be described when the source terminal and the transfer destination terminal are accommodated in different stations, that is, when the terminal C' accommodated in station C is the transfer destination.

In FIG. 4(a), the process related to the transfer destination terminal C shown in FIG. processing is shown.

Hereinafter, the explanation will be given in order. First, in the waste collection, the CC process (5) shown in FIG. 9 is executed. That is, connect the paths between PICa and POGa bidirectionally through the NW (step 901), set the terminal identification information and station code in the additional information area of the RLO signal (transfer signal) (step 902), and transfer the RL○ signal. Send it to the destination station C (
Step 903>, this process ends. The processing up to this point has resulted in the state shown in ■ in FIG.

Then, in the station C that received this RLO signal, the first
The CC process (6) shown in Figure 0 is executed.

That is, extract the station code of the additional information of the RL○ signal (step 1001), compare the station code of the additional information with the station code of your own station (station C) (step 1002), and if they are not the same, proceed to step 1006, and if the same If so, step 10
Proceed to 03. In this case, since the terminals C and C are not accommodated in the same station, the process advances to step 1006. In step 1006, the station code of the additional information is compared with the adjacent station code corresponding to the route, and it is determined whether there is the same station code (step 1007). If the same station code does not exist, execute the existing process (Step 1010); if there is the same station code, send the terminal identification information and station code to the IAM
The additional information of the signal is set (step 1008), and the corresponding adjacent station acquires the trunk of the route and sends out the IAM signal (step 1009).

Station B, which has received this IAM signal, executes CC processing (9) shown in FIG. 13. That is, the PICc is captured (step 1301), an ACM signal is sent to station C (step 1302), and this process is ended.

Station C, which has received this ACM signal, executes CC processing αO shown in FIG. That is, POGc is
The call is converted to Cc (step 1401). The processing up to this point has resulted in the state shown in ■ in FIG. 4(a).

Next, the path between the extension to which terminal C' is connected (hereinafter referred to as extension c') and PICb is released through the NW, and a bidirectional connection is established with PICc (step 1402), and the RL○ signal is sent to station B (step 1403). ), this process ends.

Station B, which has received this RL◯ signal, executes CC processing 0υ shown in FIG. That is, PICc is PO
When the incoming/outgoing call is converted to Gc (Step 1501), the POGb path is released and the POGb is connected bidirectionally to POGc (Step 1502).
The state is shown in ■ in Figure (a). Then P.O.
Gb is released (step 1503), and an R3C signal (release signal) is sent to station A (step 1504).

Next, refer to FIG. 4(b). In station A that received the above R3C signal, CC processing (2) shown in FIG.
is executed. That is, PICa and POGa are released (step 1601), the R3C signal is sent from station A to station C (step 1602), and this process ends.

Station C that receives this R3C signal executes the CCC processing shown in FIG. 17. That is, PICb is released (step 1701), and this process ends. After the processing up to this point, the state shown in (2) in FIG. 4 (6) is reached, and the terminal C' is connected and communication can be performed.

By causing each exchange (each station) to execute the processing described above, terminal C or terminal C' is connected without going through the exchange that accommodates terminal a.

Then, the connection lines between terminal a and terminal A and between terminal a and terminal C or C' are released, and these lines (including devices such as trunks) can be used for other communications, so compared to the conventional The efficiency of line usage is greatly improved.

The above series of processes is such that the relay exchange (the exchange in which terminal a is accommodated) sends information for identifying the originator to the transfer destination exchange, and the transfer destination exchange calls the originator exchange. However, the present invention is not limited to this, and the same effect can be obtained even if the relay exchange sends information for identifying the transfer destination to the source exchange, and the source exchange calls the transfer destination exchange. Obtainable.

Effects of the Invention As described in detail above, the present invention makes it possible to connect a source terminal and a transfer destination terminal without going through an exchange that accommodates a relay terminal. This is effective because the occupancy rate of trunks, etc.) can be lowered, and communication quality can be improved by reducing the number of relay exchanges.

[Brief explanation of drawings]

FIG. 1 is a diagram for explaining the present invention in detail, FIG. 2 is a diagram for explaining the invention in detail, and FIGS. 3(a) and (b)
) is a diagram showing an embodiment of the present invention, and shows the processing and state transition when the transfer destination terminal and the source terminal are accommodated in the same exchange. FIGS. 5 to 17 are diagrams showing an embodiment of the present invention, and show processing and state transitions when a transfer destination terminal and a source terminal are accommodated in different exchanges. FIG. 4 is a flowchart showing details of the processing shown in FIG. 4, FIG. 18 is a diagram showing an example of a communication network system, and FIG. 19 is a diagram for explaining a conventional transfer method. 1.2.3... Switching machine, 4.5.6.7... Terminal, 8.8', 10... Connecting means, 9.9'... Sending platform. (b)

Claims (1)

[Claims] 1. A plurality of exchanges (1, 2, 3
), and during communication between the first terminal (4) and the second terminal (5), the second terminal (5) transfers the data to the third terminal (6, 7), so that the first terminal (4) ) and a third terminal (6, 7), information identifying the first terminal (4) is sent to the exchange (1) in which the third terminal (6, 7) is accommodated during a transfer operation , 3) is connected to the exchange (2) in which the second terminal (5) is accommodated.
), it analyzes the information specifying the first terminal (4) from the sending means (9), and based on the information, the first terminal (4) and the third terminal (6, 7) are connected to the second terminal ( A means (8, 10) for connecting without going through the exchange (2) in which the third terminal (6, 7) is accommodated is provided in the exchange (1, 3) in which the third terminal (6, 7) is accommodated, and the transfer process is completed. The information transfer control is characterized in that the connection line between the first terminal (4) and the second terminal (5), and between the second terminal (5) and the third terminal (6, 7) is released after method. 2. Multiple exchanges containing multiple terminals (1, 2, 3
), and during communication between the first terminal (4) and the second terminal (5), the second terminal (5) transfers the data to the third terminal (6, 7), so that the first terminal (4) ) and a third terminal (6, 7), information identifying the third terminal (6, 7) is sent to the first terminal during a transfer operation.
Means (
9′) in the exchange (2) in which the second terminal (5) is accommodated.
and analyzes the information specifying the third terminal (6, 7) from the sending means (9') and identifies the first terminal (4) and the third terminal based on the information.
The terminals (6, 7) are connected to an exchange (
2), the means (8') for connecting without going through the first terminal (
4), and after the transfer process is completed, the first terminal (4) and the second terminal (5), and the second terminal (5) and the third terminal (6, 7) An information transfer control method characterized by releasing a connection line.