JPH03117125A - Communication system for control information - Google Patents

Abstract

PURPOSE:To decrease the control software quantity of a terminal interface equipment by providing an exclusive channel for transmitting only control information transmitted and received directly between equipments connected as two terminating circuits of a high speed multiplex circuit. CONSTITUTION:An electronic exchange 40 is provided with a central controller 42, and control information on a D channel of a terminal equipment 20 is connected to the central controller 42 through a high speed subscriber's circuit 41. A high speed multiplexer circuit 50 multiplexes each of a P channel, a 2B channel, a D channel, and a (d) channel, and brings them to digital transmission by a series format. A D channel terminating part moves to a high speed subscriber's circuit of an electronic exchange from a terminal interface equipment, and data on a data channel between the terminal equipment and the electronic exchange is not handled by a control part of a terminal interface part, but handled by the high speed subscriber's circuit being a high speed multiplex circuit terminating circuit.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a method for transmitting data between both terminal circuits of a high-speed multiplex line that connects a terminal interface device accommodating a terminal device and an electronic exchange. It relates to a communication method for control information to be sent and received.

[Conventional technology]

Conventionally, this type of control information communication method has been designed to combine control information for multiple terminal devices sent to and received from an electronic exchange into a single data set along with control information sent to and received from terminal interface devices that accommodate multiple terminal devices. It was formed into a channel and transmitted over high-speed multiplex lines.

This will be explained with reference to FIGS. 3 and 4. FIG. 3 is a connection diagram showing a conventional example, and FIG. 4 is a block diagram showing details of a portion of FIG. 3.

In FIG. 3, a LAN terminal device 10 with connection standards to a local area network (so-called LAN) and an I terminal device 10 with connection standards to an integrated service digital network (so-called ISDN) are shown.
A terminal interface device 80 that accommodates the SDN terminal device 20 is connected to an electronic exchange 90 via a high-speed multiplex line 50.

A packet switching method is applied to the LAN terminal device 10,
A packet (P) is formed using a digital code, and information is transferred using, for example, the IEEE802.3 standard procedure.

The ISDN terminal device 20 includes a telephone 21 and a personal computer 2.
2, and using the basic interface of the CCITT Recommendation Nijiries, for example, the telephone 21 is connected to the B1 channel, the personal computer 22 is connected to the B2 channel, and the control information is connected to the D channel, resulting in one channel with the basic configuration r2B + DJ. forming a format.

The terminal interface device 80 adds the control information that the terminal device 20 accommodates to the control information transmitted and received with the high-speed subscriber circuit 91 of the electronic exchange 90 through the D channel, and transmits the control information on the high-speed multiplex line 50 as the Dd channel. multiplexed into
Channel configuration: 2B10P+DdJ, high-speed subscriber circuit 9
The control unit 81 controls the connection to 1. The Dd channel is the D channel plus interface control information.

In the electronic exchange 90, a high-speed subscriber circuit 91 terminates the high-speed multiplex line 50, the Dd channel is connected to a control section 93 of the high-speed subscriber circuit 91, and information on the Dd channel is further connected to a central control unit 92.

According to FIG. 4, the terminal interface device 80 is the control unit 8
1. D channel termination section 82. Serial controller 83
．． Multiplexing and demultiplexing section 84. and interface section 32.3
It has 3. In addition, the high-speed subscriber circuit 9 of the exchange 90
1 is a control unit 93. It includes a serial controller 94 and a multiplexing/demultiplexing section 95.

The interface section 32 is connected to a P channel multiplexing/demultiplexing section 84 from the LAN terminal device 10. The interface section 33 accommodates the ISDN terminal device 20, and connects the 2B channel to the multiplexing/demultiplexing section 84 and the D channel to the D channel termination section 82, respectively. The control unit 81 adds necessary control information to the control information received from the D channel termination unit 82 to communicate with the control unit 93 that controls the high-speed subscriber circuit 91 of the electronic exchange 90 . At the same time, the control information received on the Dd channel is used to control the terminal interface device 80, and the control information for the ISDN terminal device 20 is sent to the D channel via the D channel termination section 82. Forward.

The multiplexing and demultiplexing sections 84 and 95 high-speed multiplex the respective digital codes of each channel r2B+P+DdJ onto the high-speed multiplex line 50 and transmit the same in serial format, while separating the received codes into each channel. In electronic exchange 90, the P channel and 2B channel are connected to respective switches (not shown), and the Dd channel is connected to serial controller 94. The control information on the Dd channel is processed by the control unit 93 between the control information and the terminal interface device 80, and the control information on the D channel of the terminal device 20 is processed by the central control device 92 (see FIG. 3) for call processing. ).

-5; [Problem to be solved by the invention] As mentioned above, the conventional control information communication method is to transmit control information on the D channel of the terminal device to the control units at both ends of the high-speed multiplex line that directly connects the terminal and the exchange. Since it is configured to add control information between and communicate via multiplexed control channels,
In addition to requiring a D channel termination section for each terminal device, the control section on the terminal side multiplexes the control information on the D channel with the control information between the control sections, and also controls the terminal device from the control information on the control channel. In addition to the work of separating information, there was a problem in that the amount of control software for the terminal interface device was large.

The purpose of the present invention is to multiplex the channels connected from the terminal equipment as they are, connect them to a high-speed multiplex line, and transmit only the control information to and from the control unit at the end of the high-speed multiplex line using one dedicated channel. The object of the present invention is to provide a control information communication method that solves the above problems.

[Means to solve the problem]

The control information communication method according to the present invention is a control signal communication method that is transmitted over a high-speed multiplex line connecting a terminal interface device accommodating a terminal device-6 and an electronic exchange, and exchanged between devices at the end of the line. The method is characterized in that it has a dedicated channel for transmitting only control information that is directly transmitted and received between devices connected as both terminal circuits of the high-speed multiplex line.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a connection diagram showing one embodiment of the present invention, and FIG. 2 is a block diagram showing an example of details of the main parts of FIG. 1.

In FIGS. 1 and 2, the same components as those shown in FIGS. 3 and 4 described in the prior art are given the same reference numerals and their explanations will be omitted.

In FIG. 1, the LAN terminal device 10 is a P channel,
ISDN terminal equipment has 2B channel and D channel,
Each is housed in the terminal interface device 30. The terminal inkface device 30 is connected to a high-speed subscriber circuit 41 of an electronic exchange 40 by a high-speed multiplex line 50.

The ISDN terminal device 20 is connected to the telephone 21 on the B1 channel,
It is also connected to the personal computer 22 through the B2 channel. The control section 31 of the terminal interface device 30 is connected to the control section 43 of the high-speed subscriber circuit 41 via a d channel.

The electronic exchange 40 has a central control device 42 and a terminal device 2
Control information on the 0 D channel is connected to a central controller 42 via a high speed subscriber circuit 41. High speed multiplex line 50 multiplexes each of the P channel, 2B channel, D channel, and d channel and digitally transmits them in serial format.

The details will be explained with reference to FIG. 2 and FIG. 1 together. According to FIG. 2, the terminal interface device 30 is
1. interface sections 32 and 33, serial controller 34. and a multiplexing/demultiplexing section 35. Further, the high-speed subscriber circuit 41 of the electronic exchange 40 is connected to a control section 43.
．． Serial controller 44. D channel termination section 45.
and a multiplexing/demultiplexing section 46.

The control unit 31 includes a control unit 43 of an electronic exchange 40 that exchanges control information at both ends of the high-speed multiplex line 50, a serial controller 34, a multiplexing and demultiplexing unit 35, a high-speed multiplexing line 50, a multiplexing and demultiplexing unit 46, and serial control. It connects via up to 44 D channels and controls the terminal side of the high-speed multiplex line 50.

The interface section 33 connects the D channel as well as the 2B channel to the multiplexing/demultiplexing section 35.

The serial controllers 34.44 are multiplexing and demultiplexing units 35.
46 and a high-speed multiplex line 50 via a d channel, and control information between the control units 31 and 43 is transmitted in the form of serial codes. The multiplexing/demultiplexing section 35.46 separates each channel 2E, D, P.

d and serial code transmission on the high-speed multiplex line 50,
On the other hand, serial transmission codes on the high-speed multiplex line 50 are received and channels are separated.

In the electronic exchange 40, a D channel termination section 45 terminates the D channel to a multiplexing/demultiplexing section 46, and transfers control information between the central control device 42 and the terminal device 20 via the control section 43.

In this example, explanation will be given using a LAN/ISDN terminal, a telephone, and a personal computer as terminal devices and terminals. Although it has been illustrated and described as being connected to, the above description does not limit the present invention in terms of type and quantity. The multiplexing/demultiplexing section may use any known technology.

According to this embodiment, the D channel termination section is transferred from the terminal interface device to the high-speed subscriber circuit of the electronic exchange, and the data on the data channel between the terminal device and the electronic exchange is handled by the control section of the terminal interface section. First, it is handled by the high-speed subscriber circuit, which is the high-speed multiple line termination circuit of the electronic exchange.

In addition, in the ISDN terminal device, the 2B channel and the D channel are connected as separate channels, but when handling both channels as a single channel r2B+DJ, the interface section of the terminal interface device is simplified and the can be converted into

〔Effect of the invention〕

0 As explained above, according to the control information communication system of the present invention, a terminal interface device that accommodates a terminal device and connects to a high-speed multiplex line, and a high-speed subscriber circuit that connects a high-speed multiplex line using an electronic exchange. The structure is configured so that only the control information between terminal equipment is formed into one channel, and the channels from the terminal equipment are multiplexed independently and transmitted over high-speed multiplex lines, so data and control information can be transferred only by transfer without the need for internal processing. Information can be miniaturized without being handled by the terminal interface device, and by being provided on the exchange side, it is possible to centrally manage the information.

[Brief explanation of drawings]

Fig. 1 is a connection diagram showing one embodiment of the present invention, and Fig. 2 is a connection diagram showing an embodiment of the present invention.
FIG. 3 is a connection diagram showing a conventional example, and FIG. 4 is a block diagram showing an example of partial details of FIG. 3. 10.20... terminal device, 30... terminal interface device, 31.43... control unit, 35.46... multiplexing and demultiplexing unit, 40...
... Exchange, 41 ... High-speed subscriber circuit, 42 ... Central control unit, 45 ... D channel termination section, 50 ... High-speed multiplex line.

Claims (2)

[Claims] (1) In a communication system for control signals transmitted on a high-speed multiplex line connecting a terminal interface device accommodating a terminal device and an electronic exchange, and exchanged between devices at the end of the line,
A control information communication system characterized by having a dedicated channel for transmitting only control information that is directly transmitted and received between devices connected as both terminal circuits of the high-speed multiplex line. (2) Even if the terminal device is an ISDN terminal device and a D channel exists on the high-speed multiplex line, control information directly transmitted and received between the terminal interface device and the electronic exchange is transmitted via the dedicated channel. 2. The control information communication method according to claim 1, wherein control information is transmitted and received.