JPS59229951A - Time-division multiplex transmission signal system - Google Patents

Abstract

PURPOSE:To decrease the handshake frequency on a reception terminal side by comparing received numeric data with the last numeric data and sending the data only when they are different. CONSTITUTION:When one packet transmitting signal PS is transmitted repeatedly by plural times in such a way that specific numeric data CN is added in one packet transmitting signal PS, the contents of the numeric data CN are made equal when control data CD is the same, and made different from the last one when the control data CD different from the last one is used. The numeral of the numeric data is stored on the reception terminal side every time the data is received, and compared with the preceding transmitted numeral to control a load on the basis of the control data CD only when they are different. Thus, the received numeric data CN is compared with the preceding numeric data CN and transmitted only when they are different to decrease the handshake frequency of the terminal equipment, saving the memory.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a time division multiplex transmission signal system.

[Background technology]

FIG. 1 is a seven delta diagram of a system using time division multiplexed transmission. Many □ terminal devices (1□) on a common signal line (2)
(In) is connected 6. In this system, data can be transmitted from any terminal (1) to any other terminal (fl) by time division multiplexing.

The transmission procedure at this time is performed as follows. first,
(2) The terminal device +1+ that is about to transmit starts transmission after confirming that there is no signal from another terminal device (1) on the signal line (2). If a signal already exists on the signal line (2), the terminal 11
Signal transmission starts from +. ■If there is a collision with another signal while transmitting a signal, the transmission will be stopped immediately and the transmission will be restarted from the beginning after a certain period of time. ■ By changing the waiting time of the fixed time in ■■ above depending on the purpose of signal transmission,
Prioritize transmissions.

FIG. 2 shows an example of the signal format. The signal JyJ- is transmitted serially, first the destination address data AD specifies the address of the terminal device (1) to which the signal is sent, and then the source address consisting of the address of the terminal device (1) to which the signal is sent. Data SD is transmitted, followed by control data CD specifying the content of load control. These are destination address data AD.

1 with source address data SD and control data CD
A packet transmission signal PS is configured.

By the way, there is a certain terminal (fl) that can transmit one packet.
After transmitting S once and completing it, the terminal on the receiving side can check whether the transmitted one packet transmission signal has been received, and there is no problem. Receiving side terminal f
If the other party does not return a confirmation signal from
This means that it is unclear whether the packet transmission signal Ps has been received. As a method of ensuring reliability of transmission in such a case, a method of repeatedly transmitting one packet transmission symbol Ps having the same content multiple times can be considered. Figure 5 shows the same
This shows an example in which a one-packet transmission signal PS of contents is transmitted by repeating it convex times.

Figure 'fJ4 shows the configuration of the terminal ill,
Transmission interface (3) and host] Shifter (4)
). A transmission interface (3) is connected to the signal line (2), and the function of this transmission interface (3) is to transmit received control data to the host computer (4) by executing the signal transmission procedure described above. Transfer CDs as binary data.

The host controller (4) as the sending side sends the destination address data AD and control data CD to the transmission interface (3), and the transmission interface (3) performs the subsequent procedures. become.

As described above, when one packet transmission signal PS is repeatedly transmitted a plurality of times in order to ensure transmission reliability, the following two problems arise. That is, as shown in FIG. 5, each time one frame is completed by receiving one packet transmission signal PS with the same content, the process of the host computer (4) is a handshake process, and normal work is performed. The interruption will be over. Another problem is that //i cannot be used for a torque operation in which the state is reversed when a certain percentage of short data is received. That is, in a system such as that shown in Figure 6, the terminal device (LA) has switches S to V that invert the relay R1 driven from the terminal device (1c) through the flip-flop FF and the transistor Qz. In addition, the terminal (IB) has a flip-flop FF.
2 and relay R2 driven via transisister Q2.
It has a switch SW2 for reversing. Here, a high priority is given to the transmission signal from the terminal (IB). As shown in FIG. 7, the terminal device (IC) performs handshake processing in response to the one-batch transmission signal PS from the terminal device (LA), then returns to normal processing, and relay R
Turn on the machine. Therefore, the 1-packet transmission signal PS' from the terminal (1B) may interrupt the repeated 1-packet transmission signal PS from the terminal (LA) as shown in FIG. 7(b). think. Then, the terminal device (IB
) 1gJ+ drives the siri relay R2. After the 1-packet transmission signal PS' from the terminal (IB) ends, the 1-packet transmission signal PS from the terminal @ (LA) is transmitted as shown in FIG. It turns off from.

Therefore, a problem arises in that correct control cannot be performed.

Kienio was provided in view of the above points, and its first purpose is to reduce the number of hard shakes on the receiving terminal side even in the repetition of one packet transmission signal, and its second purpose is to reduce the number of hard shakes on the receiving terminal side. The purpose is to provide a time-division multiplex transmission signal system that can be used in Europe even for terminals that perform tral operation.

[Disclosure]

Hereinafter, an embodiment of the % base will be described in detail with reference to the drawings. 8th
The figure shows an example of the format of a one-packet transmission signal PS, where the destination address data ADX, the source address router SD and the control data CD are the same as before, and all the numerical data CN are added.

The numerical data CN is created within the transmission interface (3) of the terminal device m on the side that transmits the signal.Here, for the sake of explanation, the numerical data CN has five values of 1.2.5. Suppose that the terminal device (1) of transmitter 111+1 transmits all data once using the same value of numerical data CN.As shown in Figure vJ9, one packet transmission signal PS of data with the same content is transmitted. The data is transmitted repeatedly in irregularities.First, the numerical data CN is set to CN=1, and the same data is sent all five times.Next, when different data is to be sent, it is sent as CN=2.

As shown in Figure 10 below, CN-convex, CN=l, CN
=2...... and use the values of j primary orders 1 to 3.

The terminal device (1) on the receiving side stores the value of numerical data CN every time the reception of one packet transmission signal PS is completed, and when the next one packet transmission signal Ps is received, the value of the numerical data CN is stored.
The numerical value of the numerical data CN of the 6 signal is compared with the numerical value of the previously stored numerical data CN, and if both numerical values are different, it is determined that the contents of 1-2 of the 1-packet transmission signal PS are different. Then, the data is transmitted to the host computer (4), and the load is controlled based on the contents of the control data CD. Furthermore, if the numerical value of the numerical data CN of the received signal matches the previous numerical data CNO number, it is determined that the same data is being repeatedly transmitted, and as shown in FIG.
The transmission interface (3) is the host computer 1-51f.
4) Do not transmit data to Therefore, the receiving terminal (
The handshake process between the transmission interface (3) and the host computer (4) in 1) can be reduced.
The processing power of the host computer (4) can be increased. Unfortunately, all the data of one packet transmission signal PS is not stored by itself, but only specific numerical data CN is stored, so that it is possible to save on IJ.

Next, the merged invention will be explained. 1 for specified inventions
Although only the numerical data CN of the packet transmission No. 1g PS was stored, in the combined invention, the numerical data, -data CN and the transmission °
It is designed to store the original address data SD, and has 2 m of memory for storing these data. Incidentally, the system configuration is the same as that shown in FIG. The terminal device (1) on the receiving side stores the source address data (Sl) of the received one-packet transmission signal PS and the numerical data in both the memory M□ and the memory M2, as shown in FIG. They are compared, and only if they are different, it is determined that the data is different, and the data is transmitted from the transmission interface (3) to the host computer (4), and the load is controlled based on the control data CDK. In addition, the source address data SD and numerical data CN of the received signal are stored in the memory Ml, and the data is stored in the memory ML. The contents of JM1 will be moved to Meshiri Mg. Meshichiri Mg
The contents of can be erased. On the other hand, the source address data SD of the received one-packet transmission code PS and the number 1 direct data CN
If it matches either of the two MIMs, the contents of the memory MIM2 are not changed and are not transmitted from the transmission interface (3) to the host computer (4) side 5. .

Now, in FIGS. 6 and 13, when the terminal (1C) receives one packet transmission signal PS from the terminal (IA), handshake processing is performed and relay R1 is turned on. After one packet transmission signal PS is transmitted twice,
When a 1-packet transmission signal PS is received from a high-priority terminal (1B), handshake processing is performed because the contents of the data SD and CN stored in the second MIMa are different. Relay R2 is turned on. Then, when the signal from the terminal (IB) ends, as shown in Fig. 13(a).
As shown in the figure, the remaining one packet transmission signal PS is received by one terminal device (IC). At this time, the data SD from the terminal device (IB) and the contents of 'CN are stored in the main channel Ml, and the previous data SD from the terminal device (LA) is stored in the main channel Mg.

Therefore, since the content of the data 5DXCN received this time matches the content of the data MIMa and the content of the data 91, the data CD is stored in the host computer (4) 1. was not communicated and relay R
1 is not inverted and remains on. In this way, even when an interrupt occurs due to a signal having a high priority, the total operation can be performed at low efficiency. In addition, Meshiri MI Mg also uses the source address data SD of the 1-packet transmission signal PS.
It is only necessary to uniquely identify and numerical data CN, and there is no need for many functions.

〔Effect of the invention〕

tP! As mentioned above, in the time division multiplex transmission signal system, the f-ya invention adds specific numerical data to the above packet transmission signal, and when transmitting one packet transmission code multiple times, the control data is If the content is the same, the content of the numerical data is set to the same number 1, and if control data different from the previous one is used, the numerical data is set to a different value than the previous one, and a 1-packet transmission code is transmitted, resulting in 1-packet transmission. The terminal device that receives the signal stores the numerical data each time it receives the packet transmission signal that is transmitted multiple times, and compares the received numerical data with the previously transmitted numerical data. Only when the values of the numerical data are different, the control of l packet transmission signal @l load 1ttlJ based on the data
In order to ensure integrity of the signal transmission, even if one packet transmission code with the same content is transmitted multiple times, the received numerical data will not be the same as the previous value. By sending data only when it is different from the data, it is possible to reduce the handshake processing between the host interface of the receiving terminal device and the host cocipiputer, and to increase the processing capacity of the host cocipiputer. In addition, there is no need to memorize all the data; only numerical data needs to be memorized, which has the effect of saving money.

In addition, in the combined invention, when specific numerical data is added to one packet transmission code and one packet transmission code is transmitted multiple times, if the content of the control data is the same, the content of the numerical data is If the same numerical value is used, and control data different from the previous one is used, the number 1 of the numerical data is made different from the previous one and one packet transmission code is transmitted, and the terminal on the receiving side has a 2 Mi number, and Comparing the source address data and numerical data of the received one-packet transmission signal with the contents of the above-mentioned mailbox, and performing load control based on the control data only when the contents of both mailboxes are different; In addition, since the data of the older one of the two sets of media is erased and the received data is shifted to both the media as new data and stored sequentially, the data can be stored sequentially on both the media, as in the specified invention. It is possible to reduce the number of handshake processes with the controller, and it also compares the contents stored in both devices with the source address data and numerical data of the received signal. By outputting the control data only when the contents of both menus are different from each other, the control data is
This makes it possible to determine the terminal device from which the signal is being transmitted even when the signal is being transmitted, making it possible to perform a total of previous works.Also, since the system only memorizes the source address data and numerical data, it is suitable for many systems. Produces an effect that does not require 1-.

[Brief explanation of the drawing]

Figure 1 is a seven-delta diagram of time-division high-frequency transmission, and Figure 2 is the same as above.
Packet transmission (format of fi- number, Figure 5 is a diagram showing the transmission status of the same as above, Figure 4 is a block diagram of the terminal of the same as above, v; Figure 5 is an explanatory diagram of the previous work of the same as above, Figure 6 is another A seven-delta diagram of the conventional example, FIG. 7 is an explanatory diagram of the same operation as above, and FIG. 8 is a format of one packet transmission signal of the embodiment of the present invention.
Fig. 49 is a diagram showing the transmission state of the same as above, Fig. 10 is a diagram showing the forwarding state of the same as above: FIG. 15 is an explanatory diagram of the same operation. +1) is the terminal device, (2) is the signal line, (3) is the transmission isiter face, (4) is the boss] shifter, PS is the 1-packet transmission signal, AD is the destination address data, SD is the source address data, CN indicates numerical data, CD indicates control data, and MIM2 indicates menu. Agent Patent Attorney Choshichi Ishiyama

Claims (1)

[Claims] il) A large number of terminal devices are connected to a signal line, and one packet consists of destination address data of the destination terminal device, source address data of the transmission source, and control data for load control. The transmission signal is multiplexed in time division from any terminal to any other terminal via the signal line, and the terminal with the address corresponding to the destination address data is sent to the host computer via the interface. In a time-division multiplex transmission signal system that performs load control based on control data transmitted over time, specific numerical data is added to the one packet transmission signal, and the one packet transmission signal is repeatedly transmitted multiple times. In this case, if the content of the control data is the same, the content of the numerical data is set to the same value, and if control data different from the previous one is used, the numerical data is set to a different value than the previous one, and one packet transmission signal is sent to the Send. Then, on the terminal device side that receives the 1-packet transmission signal, each time it receives multiple 1-packet transmission signals, it memorizes the numerical data and compares the received numeric data with the previously transmitted numeric data. A time division multiplex transmission signal system characterized in that load control is performed based on control data of one packet transmission code only when the numerical data differs by comparison. (2) A large number of terminal devices are connected to a signal line, and one packet transmission signal consisting of destination address data of the destination terminal device, source address data of the transmission source, and ijf control data for load control is arbitrarily transmitted. The data is multiplexed in time-division transmission from the terminal device to any other terminal device via the communication line, and the address corresponding to the destination address data is transmitted to the host computer and the seven computers via the interface at the terminal device M. In a time division multiplex transmission signal system that performs load control based on control data, when specific numerical data is added to the one packet transmission signal and the one packet transmission signal is repeatedly transmitted multiple times. , 1 If the content of the control data is the same, the content of the numerical data is set to the same value, and if control data different from the previous one is used, the value of the numerical data is set to be different from the previous value, and the l packet transmission signal is transmitted and received. The terminal device on the side has two sets of memory, and compares the source address data and numerical data of the received one-packet transmission signal with the contents of the memory, and determines whether the contents of both memories are different. If the load control is not performed based on the control data, and the older data of the two sets of data is deleted, the received data is shifted to both memories as new data and stored sequentially. A time division multiplex transmission signal system characterized by: