JPH01177237A - Two-way multiple connecting system - Google Patents

Abstract

PURPOSE:To provide customers with high-level broadcasting services by transmitting information from a broadcast receiving terminal to a broadcasting service providing terminal by using the down-transmission line of the same circuit while services are provided in the form of broadcast. CONSTITUTION:When optional ones of the integers from 1 to N are designated as J and K, #J is written in the address #K of a readout controlling memory 6 and xsiJ is written in the address other than xsiK of the memory 6 while a controller 7 is controlled. Therefore, the terminal 9 of xsiK can transmit information in the form of broadcast to another terminal by using an up-transmission line (in the direction toward the multiple separator from the terminal in the figure) and information can be transmitted from the terminal 9 of xsiV to the terminal 9 of #K by using the down-transmission line (in the direction toward the terminal from the multiple separator in the figure) of the same circuit. Therefore, high-level broadcasting services can be provided utilizing two-way communication.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a connection control method using a digital switching device having a time switch, and more specifically, to a connection control method using a digital switching device having a time switch, and more specifically, to a connection control method using a digital switching device having a time switch. Information from one specific terminal (hereinafter referred to as terminal A) among the terminals is broadcast to multiple other terminals excluding terminal A, and at the same time, information is transmitted to multiple other terminals excluding terminal A (hereinafter referred to as terminal A). A bidirectional multiple access system that allows information from one specific terminal (hereinafter referred to as terminal B) to be transmitted to the terminal A [Prior art] Fig. 3 shows a conventional It is an explanatory diagram showing a multiple access system. In the same figure, ■ is an incoming data highway, 2 is an outgoing data highway, 3 is a time switch for changing the time slot position of the data highway, 4 is a demultiplexing device, and 5 is a data highway. a time slot memory for storing the contents of time slots on the highway; 6 a read control memory for outputting the read address of the time slot memory 5; 7 a control device for controlling the contents written to the read control memory 6; 8 a clock; 9 is a terminal.The time switch 3 is composed of a time slot memory 5 and a read control memory 6, and the time switch 3 and the control device 7 constitute a digital switching device.The IS is an input data highway 1. Showing the signal format above, 2
S indicates the signal format on the output data highway 2.

#1 to #N (N is an arbitrary integer) indicate the time slot positions in the signal format on the data highway, and A to N are the information contents at the respective time slot positions.

Information from the terminal 9 is multiplexed onto the input data highway 1 by the demultiplexer 4 . At this time, information from each terminal is multiplexed into each time slot on the data highway. That is, the transmission information of the terminal with address #1 on the demultiplexer 4 is sequentially multiplexed into the #1 time slot on the input data highway 1, and the transmission information of the terminal with address #2 is sequentially multiplexed into the #2 time slot. becoming more and more The multiplexed state is as seen in the signal format IS.

Information on each time slot position on the input data highway 1 is sequentially written into the time slot memory 5 according to the clock 8. That is, if an arbitrary integer from among the integers 1 to N is ``■'', the information content of the terminal #■ is written to the address #I of the time slot memory 5.

On the other hand, the read address of the time slot memory 5 is
specified by the read content from the read control memory 6,
The read contents from the read control memory 6 are clocked by the clock 8.
According to #1. #2. .......

They are sequentially designated and read out in the order of #N.

Here, the control device 7 is controlled to read the control memory 6.
If #K is written to all addresses, the contents of the output data highway 2 will be K read out to all time slot positions, as seen in signal format 2S.

The output data highway 2 is sequentially demultiplexed by the demultiplexer 4 in the order of time slot positions in a manner opposite to the multiplexing described above. That is, #1 on outgoing data highway 2
The information on the time slot position is sequentially demultiplexed to the terminal with address #1 on the demultiplexer 4, and the information on the time slot position #2 is sequentially demultiplexed to the terminal with address #2.

Therefore, the information sent from the terminal # will be transmitted to all other terminals via this switching device.

[Problem to be solved by the invention]

However, in this method, since K is read out at the time slot position # on the outgoing data highway 2, the downstream transmission path of the terminal 9 at # (in the direction from the demultiplexer 4 to the terminal 9 in the figure) , the same information as on the upstream transmission path is transmitted in return, and terminal 9 at # only receives the information that it sent out as is, so it is meaningless, and the downstream transmission path was not used effectively. I can say that.

As described above, the conventional multiple access system is basically a unidirectional transmission system, and does not provide bidirectional communication using downlink transmission paths.

It is an object of the present invention to realize a multiple connection function and to provide a bidirectional multiple connection system that utilizes the downlink transmission path (from the time switch to the terminal) within the same line, which has not been used in the past. A two-way multiple connection capable of not only transmitting information from to the remaining terminals, but also simultaneously transmitting information from any one of the remaining terminals to the terminal. The goal is to provide a method.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a time slot memory in which each piece of information from a plurality of terminals is sequentially written to each address, and an 8 time slot memory by supplying the read address to the time slot memory. a read control memory that reads each piece of information written therein and sends it to the plurality of terminals;
a control device that sets a read address of the time slot memory to each address of the read control memory;
In a connection control method using a digital switching device consisting of the following, we have devised a method for setting a read address in a read control memory by the control device.

[Effect]

In the connection control method using the digital switching device described above, information from one specific terminal (hereinafter referred to as terminal A) among the plurality of terminals is broadcast to a plurality of other terminals excluding terminal A. At the same time, the control device controls the readout so that information from one specific terminal (hereinafter referred to as terminal B) among a plurality of other terminals excluding terminal A is sent to the terminal A. A read address of the time slot memory is set in each address of the memory.

〔Example〕

The present invention will now be described in detail with reference to the drawings.

FIG. 1 is an explanatory diagram showing one embodiment of the present invention.

In this figure, the same parts as in FIG. 3 are given the same reference numerals. The configuration shown in FIG. 1 is similar to the conventional configuration shown in FIG. 3 in terms of hardware. In the signal format IS on the input data highway 1 and the signal format 2S on the output data highway 2, the third
It will be appreciated that it differs from that shown in the figure.

Next, the circuit operation will be explained. Information from the terminal 9 is multiplexed onto the input data highway 1 by the demultiplexer 4 . At this time, information from each terminal is multiplexed into each time slot on the data highway. That is, the transmission information of the terminal with address #1 on the demultiplexer 4 is sequentially multiplexed into the #1 time slot on the input data highway 1, and the transmission information of the terminal with address #2 is sequentially multiplexed into the #2 time slot. The information of each time slot position on the input data highway 1 is sequentially written into the time slot memory 5 according to the clock 8. That is, from 1 to N
If I is an arbitrary integer among the numbers up to 1, the information content of terminal #I is written to the address #■ of the time slot memory 5.

On the other hand, the read address of the time slot memory 5 is
specified by the read content from the read control memory 6,
The content read from the read control memory 6 is clocked 8.
According to #1. #2. .......

They are specified sequentially in the order of #N.

Here, if the control device 7 is controlled and an arbitrary integer from 1 to N is set to J, then #J is set to the address #K of the read control memory 6, and #J is set to the address #K of the read control memory 6. If #K is written to an address other than #, the contents of output data highway 2 will be written as K in the time slot position other than #, as seen in signal format 2S.
J is read out at the time slot position.

The output data highway 2 is sequentially separated in the order of time slot positions by the multiplexing/separating bag W4 in a manner opposite to the above-described multiplexing. That is, #1 on outgoing data highway 2
The information on the time slot position is sequentially demultiplexed to the terminal with address #1 on the demultiplexer 4, and the information on the time slot position #2 is sequentially demultiplexed to the terminal with address #2. Therefore, the information sent from the terminal # is transmitted to all other terminals, and the information sent from the terminal #J is transmitted to the terminal #. This connection situation is shown in FIG.

That is, if the control device 7 is controlled and an arbitrary integer from 1 to N is set to J, address #K of the read control memory 6 is set to #J, and address # of the read control memory 6 is set to other than #. If you write #J in the address, terminal 9 on #
Information can be transmitted in broadcast format to other terminals using the uplink (in the diagram, from the terminal to the demultiplexer) transmission path, and the downlink (in the diagram, from the demultiplexer to the terminal) transmission path to other terminals. ) from the terminal 9 of #J to the terminal 9 of # using the transmission path.
information can be transmitted to.

In this way, #J is set to address #K of read control memory 6.
It differs from conventional technology in that by writing , it is possible to perform multiple connection paths and communication in the opposite direction on the same line. here,#
Since is an arbitrary integer, all terminals can serve as broadcast-type service providing terminals. Further, since #J is also an arbitrary integer, it is possible to receive information from any one terminal while providing a broadcast type service.

In the state shown in FIG. 1, by rewriting only the contents at address # (#J in the figure) of the read control memory 6, the receiving terminal can be switched without interrupting the broadcast service. .

When these two types of communication are combined on terminals in It becomes possible to provide advanced broadcasting services that utilize two-way communication, such as repeating broadcasts.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to transmit information from a broadcast receiving terminal to a broadcast service providing terminal using the downlink transmission path of the same line while providing a broadcast type service. Two-way communication becomes possible without the need for new installations, making it possible to provide more advanced broadcasting services.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing one embodiment of the present invention, and FIG.
FIG. 3 is an explanatory diagram of a connection mode between terminals by uplink and downlink routes realized in the embodiment shown in the figure, and FIG. 3 is an explanatory diagram showing a conventional multiple access system. Explanation of symbols 1... Input data highway, 2... Output data highway, 3... Time switch, 4... Demultiplexer,
5... Time slot memory, 6... Read control memory, 7... Control device, 8... Clock, 9...
・Terminal agent Patent attorney Akio Namiki Agent Patent attorney Kiyoshi Matsuzaki

Claims (1)

[Scope of Claims] 1) A time slot memory in which each piece of information from a plurality of terminals is sequentially written to each address; and a read address is supplied to the time slot memory to read the information from the time slot memory there. A digital switching device comprising: a read control memory that reads each written information and sends it to the plurality of terminals; and a control device that sets a read address of the time slot memory to each address of the read control memory. In the connection control method used, information from one specific terminal (hereinafter referred to as terminal A) among the plurality of terminals is broadcasted to a plurality of other terminals excluding terminal A, and the information is simultaneously transmitted. , one specific terminal among multiple terminals other than terminal A (hereinafter referred to as terminal B)
The control device sets a read address of the time slot memory to each address of the read control memory so as to send information from the terminal A to the terminal A.