JPS62159937A - Broadcast type communication system - Google Patents

Abstract

PURPOSE:To reduce the communication time by assigning a signal of a code form whose pulse location is a prime to plural communication equipments respectively in advance and providing a means identifying the signal to each communication equipment so as to attain the simultaneous return of a transmission right request reply signal and a transmission confirmation reply signal from the communication equipments. CONSTITUTION:A code form whose pulse location is a prime to each communication equipment is assigned in advance as a reply signal. When the communication equipment, e.g., 1-1 sends an inquiry signal in terms of broadcast to other communication equipments 1-2-1-m in order to check the presence of a transmission request, the communication equipment having a broadcast request among the communication equipments receiving the inquiry signal sends a reply signal of a code form assigned to itself. For example, the communication equipment 1-j sends repetitively a signal Sj having O at each Pj-bit as the reply signal. The reply signal sent from each communication equipment is ORed by a communication network 2 and the result reaches the equipment 1-1. The equipment 1-1 receives the ORed reply signal and uses it that the pulse locations are a prime to each other so as to identify from which communication equipment the reply signal comes.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a broadcast communication system between a plurality of communication devices connected through a communication network.

[Conventional technology]

When transmitting and receiving information between communication devices connected to a communication network that accommodates multiple communication devices, the transmission rights are generally managed by polling between the communication devices, and only the communication devices that have the transmission rights send information to the communication network. Send. In other words, a communication device that has the right to transmit sequentially transmits a signal (a timing signal) inquiring to other communication devices about the presence or absence of a transmission request, and the communication device that receives the timing signal notifies the other communication device of the presence or absence of a transmission request. Send a response signal. The communication device that has the transmission right transmits a transmission right delegation signal to the communication device that sent the response signal of the transmission request, and the communication device that has the transmission request acquires the transmission right.

[Problem that the invention seeks to solve]

By the way, when a communication device that has the transmission right broadcasts information simultaneously to multiple communication devices, the response signals from the multiple communication devices are logically summed in the communication network and returned to the communication device that has the transmission right. This makes it impossible for the receiving side to resolve the response signal.

Therefore, conventionally, when a communication device transmits information in a broadcast manner to multiple communication devices, the response signal for delivery confirmation sent from the multiple communication devices is There was a problem in that the transmission rights were managed and sent separately, which took time.

An object of the present invention is to shorten communication time by enabling simultaneous return of transmission right request response signals and delivery confirmation response signals from a plurality of communication devices.

[Means and effects for solving the problem] The present invention allocates signals in a code format in which the pulse positions are disjoint to a plurality of communication devices in advance, and also allows each communication device to control its own device. Means for identifying the signal is provided for each communication device except for the above.

When a certain communication device broadcasts, for example, a timing signal to a plurality of other communication devices, each of the plurality of communication devices transmits a signal in a pre-assigned code format in which the pulse positions are disjoint as a response signal. send it back as These response signals are logically summed in the communication network and received by the communication device that sent the timing signal, but the communication device utilizes the fact that the pulse positions are disjoint to determine the correspondence between each communication device. The response signal is identified from which communication device.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a configuration diagram of an embodiment of a communication system targeted by the present invention, in which 1-1 to 1-m are communication devices, and 2 is a communication device 1-1 to 1-m that are interconnected. It is a communication network.

In FIG. 2, in order to check whether there is a transmission request, for example, communication device 1-1 checks all other communication devices 1-2 to 1-1.
Suppose that a timing signal is broadcasted to m. On the other hand, each of the communication devices 1-2 to 1-m returns a response signal if there is a transmission request. Assign it. Figure 3 shows a signal with such a code format, where SR is “0” for every P1 bit.
Sj is a signal in which 0'' occurs in each P bit. Here, Pl,...Pi are mutually prime numbers (2, 3, 5, 7,...). In FIG. 3, the signal S1 is assigned to the communication device 1-1, and the signal Sj is assigned to the communication device 1-j.

Communication device 1 that received the makeshift signal from communication device 1-1
Among the communication devices 4-2 to 1-m, a communication device with a transmission request transmits a signal in the code format assigned to itself as a response signal. For example, the communication device 1-j sends Pj as a response signal.
A signal Sj in which "0" occurs every bibit is repeatedly transmitted. Response signals transmitted from each communication device with a transmission request are logically summed by the communication network 2 and arrive at the communication device 1-1.

The communication device 1-1 receives the ORed response signal and uses the fact that the pulse positions are relatively prime to identify which communication device the response signal is from.

The above operation is for checking the presence or absence of a transmission request, but the communication device 1-1 broadcasts information to the other communication devices 1-2 to 1-m, and in response, the communication device 1 -2~1
The same applies when -m transmits a response signal for delivery confirmation. In addition, in Kogi, it is assumed that the communication device 1-1 has the right to transmit, but in general, one of the communication devices 1-1 to 1-m has the right to transmit, and all other communication devices have the right to transmit. It is possible to broadcast information and receive a response signal simultaneously.

As shown in Figure 4, when broadcast information is transmitted to each communication device, in order to determine which communication device has notified the response signal, each communication device except the own device has a Communication device identification circuits 11-1 to 11-m are provided. FIG. 4 shows the configuration of the communication device 1-i, in which the identification circuits 11-1 to 11-m have a one-to-one relationship with the communication devices 1-1 to 1-m.
It corresponds to However, the communication device 1-i does not have an identification circuit 11-1 corresponding to the communication device 1-i. Each of the identification circuits 11-1 to 11-m receives and receives a response signal logically summed by the communication network 2, and each of the identification circuits 11-1 to 11-m
determines whether or not the corresponding communication device has transmitted the response signals 81 to Sm, and outputs “1” if the corresponding communication device has transmitted the response signal, and outputs “0” if it has not transmitted the response signal to the determination result terminals B1 to BIll. .

Communication device identification circuits 11-1 to 11, - in FIG.
An example of one circuit in m is shown in FIG.

For convenience, FIG. 1 shows the communication device identification circuit 11-j. In FIG. 1, 101 is a serial/parallel conversion circuit that converts the serial reception signal of the communication network 2 into a parallel signal, 1021 to 102
L is a negative circuit, 103 is a received signal storage register consisting of L bits, 104. ~104 each have register 10
105 is an AND circuit 104. This is an OR circuit that calculates the logical sum of the output signals from 104 to 104.

The communication transmission l11-j transmits a signal train in which each bit of P is set to "0", and the other communication devices transmit a signal train in which each prime number bit that is prime with Pj is set to '0''.

These signal strings are ORed by the signal network 2, and the communication device 1-
i is received by each communication device identification circuit 11-1 to 11-m. In the communication identification circuit 11-j, the serial signal string received is converted into a parallel signal 1I-jL by the serial/parallel conversion circuit 101, and then each bit of the parallel signal i,=jL is inverted by the negation circuits 1021-102□ , and store it in the register 103. The bit length of register 103 is P, O for each bit.
It suffices to have enough capacity to store a certain amount of signal sequences that occur. Regarding the contents of this register 103, an AND circuit 1041 performs a logical product for each Pj bit starting from the 1st bit, and similarly, an AND circuit 104 performs a logical AND for each Pj bit starting from the 1st bit. This results in
When the communication device 1-j transmits P, a signal string of 11071 for each bit, one of the AND circuits 104+ to 104 becomes "1", and the determination result terminal B becomes "1" via the OR circuit 105. ” becomes.

〔Effect of the invention〕

As described above, according to the present invention, response signals can be transmitted simultaneously from a plurality of communication devices in response to the timing regarding the presence or absence of a transmission request from a communication device that has the right to transmit. This has the advantage that the delegation of rights can be accomplished quickly. Furthermore, in broadcast-type information transfer to a plurality of communication devices, an acknowledgment can be simultaneously sent from the receiving communication device, which has the advantage of improving information transfer efficiency.

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of a communication device identification circuit, FIG. 2 is a block diagram showing an embodiment of an information communication system targeted by the present invention, and FIG. 3 is a code of a response signal used in the present invention. FIG. 4, a diagram showing the format, is a block diagram of a communication device identification circuit within one communication device. 1-1 to 1-m... Communication device, 2... Communication network, 1
1-1 to 11-m...Communication device identification circuits. Figure 1 Figure 2 Figure 3 Figure 4

Claims (1)

[Claims] (1) In an information communication system in which a plurality of communication devices are connected through a communication network, when a certain communication device broadcasts information to a plurality of other communication devices, each of the plurality of communication devices A response signal in a code format in which the pulse positions are relatively prime is sent back, and the certain communication device receives the logical summed response signal in a communication network, and utilizes the fact that the pulse positions are relatively prime. A broadcast communication system characterized by identifying from which communication device a response signal is received.