JPH06177898A - Response return method - Google Patents

Abstract

PURPOSE:To eliminate necessity for enhancing response processing capability of a transmission main body and to improve the transfer efficiency of information. CONSTITUTION:The information is sent in multiaddress from a transmission main body 1 by a communication path 4. When the reception main bodies 22 and 24 are abnormal in reception and another reception main body 21 is normal in reception, the main body 21 first transmits in multiaddress a response of 'reception normal' by a communication path 51. Thus the reception main bodies 22, 23, 24...2n suppress their own responses since the received responses are 'reception normal'. Then the main bodies 22 and 24 transmit in multiaddress the responses of 'reception abnormal' by a communication path 52 since the received response is 'normal reception' and the answer to be returned by themselves are 'reception abnormal'.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a broadcast communication system using a wired or wireless communication network in which transmitted information is propagated to all terminals, and in particular, one transmitting main body transmits to a plurality of receiving main bodies. After broadcasting the information,
The present invention relates to a response method in which all receiving entities that have received the information return a response indicating whether the receiving status of the information is normal or abnormal to the transmitting entity.

[0002]

2. Description of the Related Art Conventionally, in this type of broadcast communication system, in a bus type local area network shown in FIG.
Information to be transmitted to the receiving main body 31 is transmitted by the communication path 4, and the response method is as shown in FIG. 32, ..., 3n indicate the reception status of the same information (“reception normal” or “reception abnormal”) to the sender 1 in a 1: 1 communication mode, respectively.
It was returned at 2, ..., 5n.

[0003]

In the above-mentioned conventional response method, the receiving entity 31, 32, ..., 3n is the transmitting entity 1.
Since the reception status of the information from the sender is returned to the sender 1 in a 1: 1 communication mode, the response processing capacity of the sender is greatly increased in order to process the responses returned from all the receivers at once. In addition, there is a high possibility that call congestion will occur in the local area network due to the concentration of response calls to one sender, which will adversely affect other communications. Has a drawback in that the next new information cannot be transmitted until the response of "reception successful" from all the receiving entities is received, and the information transfer efficiency is lowered.

It is an object of the present invention that it is not necessary to significantly enhance the response processing capacity of the transmitting body side for the response returned from all the receiving entities, and it is not necessary for other communication to be performed due to the congestion of the response call. There is no adverse effect, and further, after receiving the response of "reception normal" from all the receiving main bodies, new information cannot be transmitted from the transmitting main body and the information transfer efficiency is not deteriorated. A method of returning a response in a broadcast communication system.

[0005]

According to the response method of the present invention, when any receiving entity sends a response to the sending entity, all other receiving entities that have received the response indicate that the response is abnormal. If so, it suppresses the transmission of its own response, and if the response is normally received, it transmits its own response only when the response it is trying to transmit is an abnormal reception.

[0006]

[Operation] When the receiving entity sends a response to the sending entity,
Since the other receiving entity that receives the response sends the response only when the response is normally received and the response to be sent is abnormal reception, the response call from the receiving entity to the sending entity is minimized. Can be reduced.

[0007]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a block diagram of a bus type local area network showing one case of an embodiment of the response returning method of the present invention, FIG. 2 is a time chart of the response returning method of the case of FIG. 1, and FIG. 3 is FIG. FIG. 4 is a block diagram of a bus type local area network showing another case of the response returning method of FIG. 4, and FIG. 4 is a time chart of the response returning method of the case of FIG.

In this response returning method, the sender 1 broadcasts information to all the receivers 21, 22, ..., 2n via the communication path 4 by using a wired bus type local area network. At this time, all receiving entities 21, 22,
.., 2n receive information from the sender 1 and do not necessarily have to individually return it to the sender 1 in response to the reception status of the information ("normal reception" or "abnormal reception") as a response. Instead, return it as follows.

As an example, as shown in FIGS. 1 and 2, the receiving entities 22 and 24 return a response indicating that the reception status is "reception abnormal", and the receiving entities 21, 23, 25-2n return a response indicating "reception normal". When trying to do so, the case where the "reception abnormality" is transmitted first will be described.

For example, when the receiving entity 22 first secures the transmission right and broadcasts a response of "reception abnormality" through the communication path 52, the receiving entities 21, 23, 24-2 receiving the response.
For n, since the received response is "reception abnormal", the transmission of its own response is suppressed as indicated by x in the figure.

In this case, at least one response (“reception abnormality”) reaches the sender 1.

Next, a case will be described in which the response of "normal reception" is transmitted first.

For example, as shown in FIGS.
When 1 first secures the transmission right and broadcasts the response of "reception normal" through the communication path 51, the receiving entities 22, 23, 25-2n receiving the response send the received response by themselves. Since this is a "normal reception" response to be attempted, the sending of its own response is suppressed as indicated by the cross in the figure.

On the other hand, the receiving entities 22 and 24 try to send a response because the received response is "reception normal" and the response they are trying to return is "reception error". The right is secured, and the response of "reception abnormality" is broadcast by the communication path 52.

The receiving entity 24 receiving the response suppresses the transmission of its own response because the received response is "reception abnormal".

In this case, at least two responses (one “reception normal” and one “reception abnormal”) arrive at the sender 1.

When the sender 1 receives at least one "reception abnormal" response, it resends the information, and when only the "successful reception" response is received, it sends the next new information. Do.

As described above, when the condition is the best, one response (one "reception normal" or one "reception abnormality") or two responses (one "reception normal") And one “reception error”) will be returned to the sender 1. However, a response of the same type as the received response may be transmitted due to the passing between the reception process and the transmission process in the reception subject 1, and a plurality of responses of the same type may arrive at the transmission subject 1. If there is no response of "reception normal" or "reception abnormality" to the transmitted information within a fixed time, 1 performs processing when "reception abnormality" is received.

Since the process (when the retransmission process is performed a fixed number of times) when the "reception abnormality" occurs again after the information is retransmitted, the description is omitted because it is outside the discussion of the present invention.

In the above embodiment, as a form of the communication network, a bus type local area network (IEEE standard 802.3: CSMA / CD, IEEE) standardized by the American Institute of Electrical and Electronics Engineers (IEEE) is used.
E-standard 802.4: a wired communication network using a token bus has been described, but the standardized ring-type local area network (IEEE)
Standard 802.5: Token Ring) and Star Local Area Network (IEEE Standard 802.3:
CSMA / CD, IEEE standard 802.5: Token
Ring) or the optical local area network (F) standardized by the American National Standards Institute (ANSI)
DDI) and other wired communication networks, or wireless communication networks using communication satellites, etc.
It is obvious that the present invention can be applied to all communication networks in which transmitted information is propagated to all terminals.

The response returning method according to the present embodiment is performed by the receiving entity 2
Answering calls from 1, 2, 2, ..., 2n to the transmission main body 1 can be significantly reduced. For example, when considering a communication network having 1000 transmission subjects, the number of responses to the transmission subject is 1000 in the related art. However, in this embodiment, the number of responses to the sender and others is at least 1 (1 "reception normal" or 1 "reception abnormality") or 2 (1 "reception normal" and 1).
The number of calls received by the sender is 1/1000 or 2/1000 of the prior art [however, the response received by the reception process and the transmission process in the reception subject is different. The same type of response may be sent, and multiple responses of the same type may arrive at the sender].

Further, since the absolute value of the response call volume to be processed is small, the transmitting entity can shorten the transmission interval of the next information,
Information transfer efficiency can be improved.

[0024]

As described above, according to the present invention, the receiving main body responds only when the response broadcasted by another receiving main body is normal reception and the response to be transmitted is abnormal reception. Is sent, the response call returned from the receiving body to the transmitting body is substantially deleted in the broadcast communication system using the wired and wireless communication networks in which the transmitted information is propagated to all terminals. Therefore, it is not necessary to strengthen the response processing capacity of the sending main unit,
Since there is no congestion of answering calls, it does not adversely affect other communications, and the absolute amount of answering calls to be processed is reduced, so the transmission interval of the next information of the sender is shortened and the information transfer efficiency is improved. There is an effect of doing.

[Brief description of drawings]

FIG. 1 is a block diagram of a bus type local area network showing one case of an embodiment of a response returning method of the present invention.

FIG. 2 is a time chart of a response returning method in the case of FIG.

FIG. 3 is a block diagram of a bus type local area network showing another case of the response returning method of FIG.

FIG. 4 is a time chart of a response returning method in the case of FIG.

FIG. 5 is a block diagram of a bus type local area network showing a conventional example of a response returning method.

6 is a time chart of the response returning method of FIG.

[Explanation of symbols]

 1 sender 21, 22, 23, ..., 2n receiver 4, 51, 52 communication path

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location 8732-5K H04L 11/18

Claims (1)

[Claims] 1. In a broadcast communication system using a wired and wireless communication network in which transmitted information is propagated to all terminals, one transmitting body broadcasts information to a plurality of receiving bodies. After that, in the response returning method in which all the receiving bodies that have received the information return a response indicating whether the reception status of the information is normal or abnormal to the transmitting body, one of the receiving entities sends a response to the transmitting entity. When sent, all the other receiving entities that received the response suppress the sending of their own response if the response is an abnormal reception, and if the response is normal, the response they try to send A method of returning a response, which is characterized in that the response of the user is transmitted only when the reception is abnormal.