JPH04183032A - Multiplexing system - Google Patents

Abstract

PURPOSE:To simplify a multiplexing circuit in a terminal equipment by inserting a communication data at a bit position deciding time slot based on multiplexing information in respect to a transmission data on the same bus S obtained by monitoring, and retransmitting the data as the transmission data. CONSTITUTION:A transmission data line 1 connected in a service total digital communication network (ISDN) terminal equipment 12 is connected to the transmission data of an ISDN terminal equipment 19 as well excepting for the ISDN terminal equipment 12 during communication of point-to-multipoint communication between the ISDN terminal equipments 12 and 19 through an ISDN 16, transmission/reception data line 17 and DSU 18. A transmission monitor circuit 3 always monitors the transmission data to the ISDN 16, the own data is inserted to the relevant time slot, and the reception data extracts the own data from the relevant time slot so that multiplexing can be executed on the bus S. Thus, the multiplexing circuit in the terminal equipment is simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a multiplexing method, and particularly to a method for multiplexing data of a plurality of terminal devices in a basic interface of an integrated service digital communication network.

C. Prior Art Conventionally, in this type of data multiplexing method, one information channel (B channel) is occupied by one terminal device during communication, so multiple pieces of data are multiplexed within the terminal device. It was a method.

[Problem to be solved by the invention]

In the conventional multiplexing method described above, there is only one part that interfaces with the comprehensive service digital communication network, and in order to multiplex multiple data, the number of ports that take in the data is required to be multiplexed, so the circuit is It had the disadvantage of being complicated.

[Means to solve the problem]

The multiplexing method of the present invention is based on the basic interface (2B+), which is one of the integrated services digital networks (ISDN).
In the multiplexing method in which multiple terminal devices are connected on the same S bus by point-to-multipoint connection of the basic function of D), the transmission data line interfaced with the integrated service digital communication network in the terminal device. a means for storing multiplexing information set in advance for each of the plurality of terminal devices; and a means for storing multiplexing information set in advance for each of the plurality of terminal devices; means for inserting communication data into a determined bit position of a time slot and retransmitting it as transmission data; and means for inserting communication data into a determined bit position of a time slot and retransmitting it as transmission data, and means for extracting communication data at a bit position.

〔Example〕

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

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
Diagram showing point Φ toe multi-point connection, 3rd
The figure shows the bit positions of time slots.

In FIG. 2, the l5DN network 16. Transmission/reception data line 17
．． DSU18. via l5DN terminal device (1)
12 and the l5DN terminal device (2) 19 are communicating with the point-to-fist multipoint connection, the transmission data line 1 connected to the ISDN terminal device (1) 12 of the 12
SDN terminal device (1) 15DN terminal device other than 12 (2
) 19, the output of the transmission monitor circuit 3, which is constantly monitored by the transmission monitor circuit 3, inputs information indicating the bit position of the time slot to the comparator circuit 5, as shown in FIG. .

Further, information indicating the bit position of the transmission time slot stored in the time slot memory 11 in advance, that is, multiplexing information, is used as the transmission time slot information 7, and the comparator circuit 5
is input.

Comparison circuit 5 performs a comparison based on the above information, and if they match, sends transmission timing 6 synchronized with the bit position of the time slot shown in FIG. 3 to transmission control circuit 8.

Transmission data 13 is sent from the data processing circuit 15 to the transmission control circuit 8. The transmission control circuit 8 controls sending the transmission data 3 to the transmission data line 1 based on the transmission timing 6.

This allows the transmission data from the I5DN terminal device to be inserted into the bit position of the time slot shown in FIG. 3.

On the other hand, the reception circuit inputs the reception data line 2 to the reception control circuit 9 . Information indicating the bit position of the reception time slot stored in the time slot memory 11, that is, multiplexing information, is inputted to the reception control circuit 9 as reception timing 10.

Based on the reception timing, the reception control circuit 9 sends the reception data specified in the bit position of the time slot shown in FIG. 3 from the reception data line 2 to the data processing circuit 15 as reception data 14, and processes the multiplexed data. Extraction becomes possible.

〔Effect of the invention〕

As explained above, the present invention monitors transmission data to a comprehensive service digital communication network, inserts the own data into the corresponding time slot, and extracts the received data from the corresponding time slot. This has the effect of simplifying the multiplexing circuit in the terminal device by performing the above multiplexing.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a connection diagram when the l5DN terminal device of FIG. FIG. 1... Transmission data line, 2... Reception data line, 3...
- Transmission monitor circuit, 4... Transmission monitor output, 5...
Comparison circuit, 6... Transmission timing, 7... Transmission time slot information, 8... Transmission control circuit, 9... Reception control circuit, 10... Reception timing, 11... Time slot memory, 12...l5DN terminal device (1)
, 13... Transmission data, 14... Reception data, 15
... data processing circuit, 16... l5DN network, 17.
...Transmission/reception data, 18...DSUl 19...l
5DN terminal device (2).

Claims (1)

[Claims] In the multiplexing method that connects multiple terminal devices on the same S bus using point-to-multipoint connections, which are the basic functions of the basic interface (2B+D), which is one of the integrated service digital networks (ISDN), means for monitoring a transmission data line interfaced with a service integrated digital communication network in a terminal device; means for storing multiplexing information set in advance for each of the plurality of terminal devices; means for inserting communication data into a predetermined bit position of a time slot based on the multiplexing information for transmission data on the same S bus and retransmitting it as transmission data; and a reception interfaced with the service integrated digital communication network. A multiplexing method comprising means for extracting communication data at a predetermined bit position of a time slot based on the multiplexing information from the data.