JPH02159193A - Exchange control system - Google Patents

Abstract

PURPOSE:To improve processing efficiency and to improve responsiveness to an input side by simultaneously executing the transmission of a call setting receiving message to an input side line, the transmission of a call setting message to an output side line, and internal path setting of a digital exchange. CONSTITUTION:An ordinary analog terminal 3, an analog trunk line 5, an analog special line 7 are connected to an exchange main body 1. Further, to cope with an ISDN, an ISDN terminal 9, an ISDN trunk line 11, and an ISDN special line 13 are connected. The exchange main body 1 is in a distributed processing system by means of plural processors. The call from the input side line is realized as the transmission of the 'call setting' message to the exchange side. The message is fetched to the input side processing of the exchange. On the contrary, the exchange simultaneously executes the transmission of the 'call setting receiving' message to the input side line, the transmission of the 'call setting' message to a network to be the output side, and tie internal path setting in the exchange. Thereafter, the 'call setting receiving' message corresponding to the 'call setting' message is received from the network side.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a switching control system for a digital switching equipment compatible with so-called I5DN.

(Prior Art) The transition from analog to digital has affected all fields, and communication networks are one of them. Currently CCITT (International 7
I5DN (Integrated 5ervic Telephone Advisory Committee) is currently considering international standardization.
According to the l5DN, which is a specific example of e-DIgital Network (service integrated digital network), currently, services have not traditionally been provided independently for each type of terminal, such as telephone networks, data communication networks, facsimile networks, etc. By integrating the communication networks into one network, more diverse services will be realized. With the realization of such I5DN, private branch exchanges (Private branch exchanges)
Of course, e Branch Exchange) is also l5D.
Nitrogenization is required.

When an I5DN compatible exchange receives a "call setup" message from the incoming side, it is necessary to execute the following three processes.

■ Sends a "Call Setup" message to the outgoing side. Sends a "Call Setup Accepted" message to the 0 party side. ■ Sets a path inside the exchange. In these three processes, the information necessary for each execution is sent to the "Call Setup" message. (different from analog), there are no restrictions on the order of execution and they can be executed in parallel.

(Problem to be Solved by the Invention) The purpose of the present invention is to impose constraints on the execution order of the three processes described above, namely, the transmission of the "Call Setup" message, the transmission of the "Call Setup Acceptance" message, and the establishment of the internal path. The aim is to improve responsiveness to callers by parallelizing these processes.

[Structure of the Invention] (Means for Solving the Problems) The present invention provides a digital exchange that accommodates a plurality of digital lines each consisting of an information channel and a signal channel.
When a call setting message is received from the incoming side, a call setting acceptance message is sent to the incoming line, a call setting message is sent to the outgoing line, and an internal path of the digital exchange is set up in parallel.

(Operation) In the present invention, when a call setup is received, subsequent processing is performed in parallel, so processing efficiency can be improved and responsiveness to the incoming side can be improved.

(Example) Next, an example of the present invention will be described with reference to the drawings. The exchange of this embodiment is constructed as shown in FIG.

A conventional analog terminal 3, an analog office line 5, and an analog dedicated line 7 are connected to the exchange main body 1. Furthermore, l
5DN compatible, 15DN terminal 9, ISDN
A central office line 11 and an SDN dedicated line 13 are connected.

For example, a plurality of l5DN terminals 9 are connected to a 4-wire line as a basic rate service, and have two information (B) channels for voice or computer communication, and one signal (D) channel for call setting control. Any two-way communication is performed using part or all of the system. On the other hand, the trunk system is connected to the public network or private line in units of, for example, 23B+D or 24B at the primary rate. The I5DN-compatible exchange sets up paths for calls from these terminals, central office lines, and leased lines.

Next, the system configuration of the exchange main body 1 will be explained.

The system configuration here is a distributed processing system using a plurality of processors, as shown in FIG. This is intended to distribute functions and load distribution, and the main CP
U 31. It is composed of local CPUs 33a and 33b, boat CPUs 35al-a3, and the like.

Next, the operation and processing in this embodiment will be explained in detail based on FIG. FIG. 1 shows an outline of the operation of this embodiment. A call originating from the incoming line is realized by sending a "call setup" message to the exchange (
Step A). This message is taken into the ingress processing of the exchange.

In response, the exchange sends a "call setup acceptance" message to the input line (step B) and a "call setup" message to the outgoing network (step C).
and the setting of an internal path in the exchange (step D) are performed in parallel. Thereafter, a "Call Setup Acceptance" message corresponding to the "Call Setup" message is received from the network side (Step E).

In this way, when the exchange receives a call setup, the subsequent processing is performed in parallel, so processing efficiency is improved and the response to the incoming side becomes extremely fast.

Next, the operation of this embodiment will be explained in more detail with reference to FIG.

The call originating from the incoming line is realized by sending a "call setup" message to the private branch exchange (step AI). This "call setup" message is taken into the boat CPU 35al to which the incoming line is connected. Boat CPU35
al sends a "call setup request" message corresponding to this "call setup" message to the local CPU 33a (step A2), which is taken into the main CPU 31 (step A3).

The main CPU 31 uses the information necessary for subsequent processing, which is also included in the "Call Setup" message, that is, the information necessary for a series of processing accompanying the setting of an internal switch path, etc.
“Call setup acceptance request” to local CPU 33a
Sending a message (step Bl) and local CPU
The "call setup request" message to the local CPU 33b (step C1) and the "internal path setup request" message to the local CPU 33c (step Di) are performed almost simultaneously.

Thereafter, the local CPU 33a sends a "call setup acceptance request" message to the boat CPU 35al (step B2), and the boat CPU 35al sends a "call setup acceptance request" message to the boat CPU 35al (step B2).
It is sent to the incoming line as a "Call Setup Accepted" message (
Step B3). In the local CPU 33b, a "call setup request" message is sent to the port CPU 35a4 (step C2), and the message is sent to the boat CPU 35a4.
The message is sent to the outgoing line as a "call setup" message (step C3). Note that the boat CPU 35a4 will subsequently receive a "call setting acceptance" message from the outgoing line. The local CPU 33c sends the "internal path setting request" message to the boat CPU 35a.
7 (step D2). And boat CP
U 35a7 sets an internal path (step D3
).

According to such embodiments, "call setup" from the ingress line
When the main CPU 31 receives the message, the main CPU 31 calls each local CPU 33a, 3 based on information necessary for subsequent processing included in the content of the "Call Setup" message.
Since messages are sent to 3b and 33c almost simultaneously, subsequent processing is performed in parallel, making the overall processing time extremely short.

Although the embodiments of the present invention have been described above, the present invention is not limited to these embodiments in any way. For example, the exchange that controls switching processing may be a PBX or a central office exchange. Further, it is not necessary to include an analog office line. Furthermore, the call processing software may be layered in any way, without being structured as in the embodiment, or may not be layered.

As described above, this invention can be implemented with various modifications without departing from the spirit thereof, and such modifications are naturally included within the scope of this invention.

Note that the call setup message and call setup acceptance message used in this text are not limited to I5DN, but also include messages with the same function in other protocol systems.

[Effects of the Invention] As explained above, according to the present invention, processing efficiency can be improved and responsiveness to the input side can be improved.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an outline of processing steps in an embodiment of the present invention, and FIG. 2 is a diagram showing an outline of processing steps in an embodiment of the present invention.
FIG. 3 is a diagram showing a hardware configuration for call processing in the exchange shown in FIG. 2. FIG. 4 shows details of the processing steps outlined in FIG. 1. It is a diagram. 1... Exchange main body, 3... Analog terminal, 5...
Analog office line, 7...analog dedicated line, 9...l5
DN terminal, 11...l5DN station line, 13...l5D
N dedicated line. Figure 1

Claims (1)

[Claims] (1) When a digital exchange that accommodates multiple digital lines consisting of information channels and signaling channels receives a call setup message from the ingress side, it sends a call setup acceptance message to the ingress line and a call setup message to the egress line. An exchange control method characterized by performing the transmission of data and the setting of an internal path of a digital exchange in parallel.