JPH1013321A - Radio communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a communication route with a low error rate and to enhance reliability by detecting the error rate so as to know a communication situation when feeble radio data communication with less power is started. SOLUTION: In this radio communication system, plural slave stations where a bit error rate detecting circuit E is provided in a signal path after reception electric wave is demodulated are included, bit error rate code data transmitted from a master station is judged by the bit error rate detecting circuits E provided in the slave stations when communication is started, the error rate is returned to the master station and the master station which receives it judges whether data being more normal than the information is transmitted or not. When the answer no, the communication route is automatically secured so as to permit communication to be executed with the relaying slave station.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication system using low power and weak radio waves, and more particularly to a wireless communication system including one master station wireless communication device and a plurality of slave station wireless communication devices.

[0002]

2. Description of the Related Art In a conventional system, when a radio communication apparatus starts communication, carrier sensing is performed in advance so as not to cause interference with other radio communication apparatuses, and no other communication is performed. After confirming that no other communication is being performed, communication is started.

In a system in which communication control is performed by a polling method and a plurality of wireless communication devices communicate at the same frequency, other communication is monitored by carrier sense when starting communication. In a slave station wireless communication device far from the master station wireless communication device, when communication may be difficult due to a sudden obstacle or the like,
It is impossible to confirm the normality of communication without knowing the error rate at which communication is performed.

[0004]

A radio communication system according to the present invention comprises a master station radio communication apparatus and a plurality of slave station radio communication apparatuses, wherein the master station radio communication apparatus has a bit error rate detection code at the start of communication. Is transmitted to the slave station wireless communication apparatus to be communicated, and the slave station wireless communication apparatus to communicate returns an error rate detection result based on the bit error rate detection code to the master station wireless communication apparatus. When the error rate detection result is out of the specified range, the master station wireless communication device relays the control signal to the slave station wireless communication device to be communicated by relaying another slave station wireless communication device. I do.

[0005] In this configuration, the master station radio communication device is arranged at a management place in the game center, and the plurality of slave station radio communication devices are arranged corresponding to the game machines in the game center.

[0006] The master station wireless communication device performs charging management of the game machine by communicating with the plurality of slave station wireless communication devices.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a system configuration according to an embodiment of the present invention. FIG. 2 shows a detailed configuration of the master station and slave station wireless communication devices in FIG. FIG. 3 shows a format of a control signal transmitted from the master station wireless communication apparatus (master station) to the slave station wireless communication apparatus (slave station). FIG. 4 shows a format of a control signal transmitted from the slave station to the master station. FIG. 5 shows an operation sequence when relaying is unnecessary. FIG. 6 shows an operation sequence when there is a relay.

Referring to the drawings, this radio communication system includes one master station and a plurality of slave stations. Each slave station receives a radio wave, demodulates it by a detection circuit D, and provides a bit error rate detection circuit E in a reception signal path where a digital signal is reproduced. The master station has previously stopped the function of the detection circuit E. Other circuit configurations are the same as those of a general wireless communication device. When a certain station is called from the master station, a control signal including a bit error rate detection code and a communication access code (connection request) is transmitted. The slave station receives the transmitted control signal, detects the error rate in the bit error rate detection circuit E, and outputs the error signal to the control circuit F as a value of 0 to 100%. This value is temporarily stored in the control circuit F.

A master station sends a slave station ID and calls a slave station having the ID. Upon receiving the slave station having the corresponding ID, the slave station transmits a control signal of a connection response to the master station at the time of transmission, together with the stored error rate detection value as data. The master station determines the connection with the slave station based on the connection response and the error rate detection value.
When the error rate detection value is received, if it is outside the specified value, the connection with the slave station alone is temporarily stopped, and the slave station is called again by relaying another slave station. The slave station transmits the connection response and the error rate detection value again, and starts communication when the master station determines that it can receive the error. If a connection response from the slave station is not received by the master station while a connection request is sent from the master station to call the slave station, the connection is temporarily stopped by the timer and the state changes from the reception state to the standby state.

In the above configuration, the master station is arranged at a management place in the game center, each slave station is arranged corresponding to the game machine in the game center, and the game machine is charged by communication between the master station and the slave station. It can be implemented as a wireless communication system that performs (coin) management.

[0012]

As described above, according to the present invention, the error rate is detected and notified to the master station, so that when the error rate is low, communication is automatically performed via the relay slave station.
Reliability can be improved by securing a communication path with a low error rate.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram according to an embodiment of the present invention.

FIG. 2 is a detailed configuration diagram of a master station and slave stations in FIG. 1;

FIG. 3 shows a format of a control signal from a master station.

FIG. 4 is a format of a control signal from a slave station.

FIG. 5 is an operation sequence when relaying is unnecessary.

FIG. 6 is an operation sequence when there is a relay;

[Explanation of symbols]

 E bit error rate detection circuit F control circuit

Claims (3)

[Claims] 1. A wireless communication apparatus comprising: a master station wireless communication apparatus; and a plurality of slave station wireless communication apparatuses, wherein the master station wireless communication apparatus transmits a control signal including a bit error rate detection code at the start of communication to the slave station wireless communication target. The communication target slave station wireless communication device returns an error rate detection result based on the bit error rate detection code to the master station wireless communication device, and the master station wireless communication device transmits the error rate. Wireless communication system, wherein when the detection result is out of a prescribed range, the control signal is retransmitted to the slave wireless communication device to be communicated by relaying the other slave wireless communication device. 2. The wireless communication apparatus according to claim 1, wherein the master station wireless communication device is arranged at a management place in the game center, and the plurality of slave station wireless communication devices are arranged corresponding to game machines in the game center. 2. The wireless communication system according to 1. 3. The wireless communication system according to claim 2, wherein the master station wireless communication device performs charge management of the game machine by communicating with the plurality of slave station wireless communication devices.