JPS6173496A - Communication system - Google Patents

Abstract

PURPOSE:To eliminate a program to be used in common by many access processing and its following memories from a system by executing master communication control processing and slave communication control processing simultaneously in parallel only by an inherent control device included in a terminal on the basis of a plural-tag method. CONSTITUTION:A blank/block flag separated from a rapid multiplex highway is supplied to a flip flop (FFs) F/F1-n constitute a ring-like shift register together with other similar FFs in the system. Respective terminals T1-Tn are connected to respective FFs F/F1-n, and when a blank flag is circulated, each terminal catches the flag and set up a block flag to circulate the flag to the succeeding terminal. The blank/block flags are circulated on the ring-like shift register and the flag for one channel can be accessed only from one terminal. The terminal once catching the channel can transmit plural tags simultaneously to the channel. All the terminals always monitor the tags on the rapid multiplex highway to extract a tag of which destination terminal address coincides with the self-address.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a system that has a large number of subscriber terminals and that performs communication by inducing a desired link between two or more terminals at any time. .

BACKGROUND OF THE INVENTION Conventional such systems are based on a switch or group of switches.

It consisted of telephone exchanges, data exchanges, complex exchanges, etc., and terminals such as telephones, facsimile machines, data communication terminals, and converters. A terminal (for example, a telephone) that wants to communicate first sends a calling signal (off-hook in the case of a telephone) and a connection signal (dial or touch tone in the case of a telephone) to the exchange, and then communicates. Specify the other party's terminal.

In response to this, the exchange selects and connects a vacant communication path to form a link, and sends a calling signal (16 Hz signal current in the example of a telephone) to the other end station. In this way, desired communication is performed at any time. When the communication ends, the terminal sends a call termination signal (in the example of a telephone, it is an on-book signal), and the exchange receives this signal and releases the link.

In current exchanges, these control processes are stored in the central secondary equipment h'! This is normally accomplished by a program (software). This program is used for the normal call connection processing described above, such as call waiting,
Realize callback transfer, etc.

In today's exchanges, the number of these θIR functions is no less than 100.

(Problems to be Solved by the Invention) In the conventional non-stem system, a large number of terminals always issue communication requests at random, and a central control program must always process a large number of calls in parallel. Each resource in the system (i.e., connection circuits in terms of hardware, transaction areas in memory, tables, etc. in terms of hardware) is shared by each call process, so if there is a bug in the program, If interference occurs between call processes that should be independent, or if shared resources are used improperly, data may be destroyed, and there is a risk that the entire system may become confused or the system may go down. Such risks are not just a matter of possibility, but are actually frequently experienced in practical systems on a daily basis. This problem is unavoidable because many call processes share programs and memories, and the common programs run on replaceable memory.

The present invention seeks to eliminate from such systems programs and associated memory that are shared by multiple call processes.

(Means for Solving the Problems) and (Actions) The present invention provides one specific means for achieving these objects.

Analyzing one central control program m), it can be seen that it has two opportunities in terms of real Iq. One of them is to select an idle route for desired communication and establish a link, and the other is related to interaction between communicating terminals.

These interactions range from basic calls such as calling, paging, and ending calls to a wide variety of functions such as temporary hold, transfer, interrupting a multiparty call (conference call), and waiting. This interaction usually involves only two opposing terminals.

Even if third parties are sometimes involved, the number of third parties is extremely limited. In other words, this interaction takes place within the overall system, although it is not totally unrelated to the system as a whole.

Most of these can be seen as locally independent events associated with each call.

This interaction can therefore be separated from the central control program if suitable concrete measures are found. −
Regarding dynamic line route selection, once the start and end points are specified, this can be accomplished by repeating a relatively simple process.

Even if it is realized by software control, the program will be extremely simple and can be directly written, and depending on the case, it will also be practical to realize it by software control.

The present invention provides a control device for a microprocessor that incorporates the above interaction into a terminal by introducing the concept of a tag.

This eliminates the need for a central controller program.

The system of the present invention consists of a terminal and a high speed multiple highway.

Digital transmission is used between the terminal and the high-speed multiplex highway.

The end of the screw could be directly connected to a high-speed multiplex highway, but a more realistic means of implementation would be to install hardware called a node at an appropriate point on the high-speed multiplex highway and connect several terminals together. There is a method of connecting to Eway via high-speed multiplexing nodes.

Of course, digital transmission is used between the node and the terminal.

High speed! "...Transmission on Weiwei is a one-time division multi-way system. That is, a number of channels (hereinafter referred to as channels) are arranged in time division, and each channel has a time slot of at least 125 μs once. Figured out (125μ
When transmitting telephone audio, it is called S (1 [9 always 8K).
This is because a sampling frequency of I-1z or higher is required. ) High-speed multiplexing: In addition to the channels, at least a flag indicating the idle/blocked status of each channel and a time slot for transmitting a tag associated with each channel are superimposed on the way. Furthermore, time slots for transmitting additional information may be provided as necessary.

Each terminal is logically chained together with respect to at least the idle/blocked flag, and the idle/blocked flag always cycles through all terminals in sequence.

A terminal wishing to communicate seizes a channel whose flag is empty and blocks that flag to reserve that channel for transmission.

(Example) A concrete implementation circuit is shown in FIG. The empty line/blockage flag separated from the high-speed multiplex highway forms a signal as shown in FIG. F/F l
.about.n forms a ring-shaped 7-foot register with similar fringe of nodes in the nostem as well. Each terminal T1~
To is connected to each of Furi, Pflo, and F/F l to Fn, and when the empty line flag comes around, it can be captured, set a blocked flag, and passed on to the next line. The air/busy flag circulates on a ring-shaped/foot register, and the flag of one channel can always be accessed from only one terminal, and cannot be accessed from two or more terminals at the same time. The channel is prevented from being captured by two or more terminals, ie, collisions do not occur.

Once a terminal has acquired a channel, it can transmit tags along with that channel. The tag consists of destination terminal address 7, source terminal address, and command/response.
This is Yu, an information professional. One feature of the present invention is that it is configured so that a plurality of tags can be transmitted simultaneously on one channel.

All terminals constantly monitor the second tag using high-speed multiplexing and extract the tag whose destination terminal address matches its own address.

It is possible to know the address of the other terminal from the issuing terminal address written on the tag, and the channel number captured by the other terminal from the channel number attached to the tag. If a terminal that has received a tag addressed to itself has already acquired a channel, it uses that channel, and if it has not yet acquired a channel, it acquires a new channel using the same process as described above. Then, a tag for a response is sent to the other party's terminal.

As can be seen from the above explanation, each terminal acquires a channel for its own transmission, and the same channel is never used for transmission and reception.

Information and control between terminals, ie, calling, answering, ending a call, displaying 7 interrupts, and maintaining W7. All transfers and the like are transmitted and executed by sending and receiving commands and responses written in tags. All of these processes are controlled by the microcontroller built into the terminal, and no high-speed multiplexing network or nodes are exposed to this.

In other words, there is no centrally controlled wholesale program in the system, so even if there is a bug in the program built into the terminal, the impact will be limited to the communication between the terminals/the entire system. 9. Now, in normal communication, there is control between terminals! 41 is a command/command by tag.
This is done through the exchange of responses and information (voice).

data signals, etc.) are transmitted through the captured channel. However, in the system of the present invention, it is also possible to communicate only by tags without information transmission by channels.

As mentioned above, one feature of the present invention is that the terminal is configured to be able to receive multiple tags associated with one acquisition channel, and the terminal is configured to be able to receive multiple tags simultaneously. Ru. Communication using only tags is effective in processing events involving a third party.

The first is busy handling. +411 This is a case where there is a call from a third party while the two parties are on the phone. A terminal that receives a tag indicating a call from a third party can continue to send out the tag indicating that one call is in progress, and can send back a response indicating that the call is busy using the second tag to the caller. When the caller finds out that the other party is busy, he or she can simply hang up or send a command requesting an interruption, a meeting, or the like. In this way, while the main communication continues as it is, it is possible to exchange cutting information with a third party using only the tag and to proceed in parallel with the processing associated therewith. Moreover, regarding communication using only tags.

Rather than acquiring a new channel, the second tag is sent along with the already acquired channel, so high-speed multiplexing time slots are not wasted.

The second example is transfer processing. When you want to transfer a call that has been answered to Lr: to a third party, that terminal first sends a temporary hold command to the other party's terminal. As a result, the call is temporarily suspended, and is passed only by tag (j'J to VJ L).
%'available.

Next, that terminal uses the tag '-2' to call the transfer destination and inform it of the transfer. This is done in the normal call process. Thereafter, the transfer is completed by issuing a tag containing a command for transfer from that terminal to both the pending )+11 and the transfer destination.

A third example is a conference call. The terminals of the conference members each place a plurality of tags corresponding to the members of the pond on their acquisition channels and acquire the same +1. Send to ¥.

As a result, all members receive the channel and a conference call is realized. That is, a member's statement is heard by all other members.

The three examples given above are just examples of the use of the IT tag method.

Application of the present invention is not limited to the above three examples.

One embodiment of the present invention will be described below.

FIG. 2 shows an embodiment of the invention with three nodes N.

A large number of terminals (Station) Tl~To are high-speed multiplexed via node N...Iway (LtxJp)
It is connected to the.

FIG. 3 schematically shows the internal configuration of node N.

High-speed multiplexing... Loop interface (Loop) is the gateway to
e) LIF and each terminal (3Cation) T
A number of ports that are connections with l~Trl
It consists of PI~P.

Terminal (StaLion) 'rl-Tn and 7-do (
The format of the digital signal exchanged with Node N is as shown in FIG. 125
8-bit audio/data signal VD sent every μ5,
, pids C5 to C9, which contain tags and additional information, are inserted between them. If only the tag bits are extracted and arranged, the result will be as shown in FIG. 5, and eight 48-bit tags will be transmitted. One tag is the destination address PA
DD (Receiver AddreSs) 16 bits, source address 5ADD (5ender Add
ress) +6 B, C, Commando/Response C
D (Command/Reponse) 8 bits, 7 bits, parameter that determines the details of the command/response CD P (Parameter) Total of 8 bits: 18
Consists of B and C.

These signals collected from each terminal (Station) 'rl to Tn are combined on a high-speed multiplex highway (Loop) as shown in FIG. That is, during 125 μs, n channels CHI -CHn (each channel consisting of 8-bit audio data signals) are arranged and the tag (
Tag) and network control wholesale signals are transmitted. The network control signal includes a flag indicating the empty/busy status of each channel. If only the tag bits are taken out and arranged, the result is as shown in FIG. 7, where the tag 'j is transmitted in a low-order order to 81 corresponding to each channel.

1k - / Ming 4Di! ``7) Otsu゛:'
:(i'3": T i,: Empty TE', J: I-)
Command response (Comma) given between terminals
Examples of nd/Re5ponse) are as follows.

An example of call processing performed with M for cholera command response is shown in FIG. 8 (a) 1 normal call fh 1 busy connection (c 1 interrupt connection (d) transfer connection).

(Effects of the Invention) As can be seen from the above embodiments, the purpose of the present invention is to not only control the main message using the multiple tag method, but also to control multiple subordinate communications while continuing the main message. The purpose is to provide a means to perform control processing simultaneously and in parallel, and a means to simultaneously perform main communication (δ) with multiple parties (conference telephone), and all applications realized using this means. The examples are within the scope of the present invention, and the advantages of the present invention are to eliminate the existence of a centrally controlled wholesale program,
What's more, it is possible to realize system functions that are irreplaceable.

[Brief explanation of the drawing]

FIG. 1 (,l) is an embodiment of the present invention, where N is a node and F/l
``l −■, /'r'n is a flip-flop, Tl
~T indicates a terminal. Figure 1 ([)] shows an example of the empty/closed line of each channel (bit 1.17 of the signal indicating the flag). F, S are codes indicating the beginning and end of the signal. Section 2 is a schematic diagram of the system in question where the present invention is applied x, r. N is a node, and Tl to To are terminals. In the diagram showing the outline of the configuration, LIF is a loop interface,
P+ to pn indicate connections with each terminal. FIG. 4 shows terminals T1 to Tn (SLation) and node N in FIG.
(Node), Figure 5 is a diagram showing only the tag bits in Figure 4, and Figure 6 is the signal on the Loop between nodes N (Node). Figure 7 shows the format
A diagram where only the tag bits of the diagram are extracted. Figure 8 (at,
(hl, (c), (bl is command response 1
In the flowchart illustrating an example of call processing performed during a call, fal indicates a normal call. (hl indicates busy-disconnect, (C) indicates busy-interrupt, and (d) indicates transfer.

Claims (1)

[Claims] (1) A device that connects a high-speed multiplex highway, a large number of terminals, and a terminal to the high-speed multiplexed highway, and causes each terminal to circulate a flag indicating empty or blocked channels on the high-speed multiplexed highway to capture empty channels. and a means for causing each terminal to transmit multiple tags containing destination address, source address, and command/response information, and by transmitting and receiving tags between terminals, main communication control processing and follow-up What is claimed is: 1. A communication system characterized in that control processing for communications is executed simultaneously and in parallel only by a control device built-in to a terminal.