JPS62128626A - Limiting system for duration of call in radio communication - Google Patents

Abstract

PURPOSE:To secure the bidirectional communication with no interference by providing to a transmission time control part, a transmission waiting part and a limit display part to each radio equipment, and using the same radio frequency in common with both transmission and reception. CONSTITUTION:The transmission time control parts 4-1-4-n are provided together with the transmission waiting parts 6-1-6-n, and the limit display parts 7-1-7-n. The parts 4-1-4-n are provided to the radio equipments 101-103 for supervisory of the transmission time. In addition, the hearing time is secured. Thus no limit is given to the duration of call in case a radio equipment excepting for the one under transmission has no request for call. If the radio equipment other than the one under transmission has a request for call, this fact is informed to an operator under transmission and the duration of call is substantially limited. In such a way, the request of the operator is satisfied with each radio equipment. Furthermore, the effective application of a radio wave is attained.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a wireless communication system (so-called Breathtalk system) in which a plurality of wireless devices share the same radio frequency for transmission and reception.

(Prior art) In this conventional method, the same radio frequency is used for both transmission and reception, so while one radio is transmitting, other radios can only listen. . Therefore, until the transmitting radio voluntarily stops transmitting, it will not be able to transmit even if an emergency occurs on another radio, and the transmitting side will not be able to continue transmitting because it does not know the status of the other party. It was something that would end up happening.

(Problems to be Solved by the Invention) In the conventional wireless communication described above, a drawback is that it is impossible to interrupt the transmitting operation on the transmitting side and start the transmitting operation on the receiving side in case of an emergency. was there.

An object of the present invention is to eliminate the above-mentioned drawbacks by equipping each radio with a transmission time control unit to monitor the transmission time and provide a listening time, thereby providing a radio configured to be able to respond to emergency situations. The purpose of the present invention is to provide a method for limiting call time in communications.

(Means for Solving the Problems) The call time limit system in wireless communication according to the present invention is established by a plurality of radio devices, each of which has a transmission time control section, a transmission special section, and a limit display section. It is configured so that the same radio frequency is shared for transmission and reception so that bidirectional communication can be performed without any problems.

The transmission time control section is for momentarily interrupting transmission at every preset transmission time.

The transmission special unit is for transmitting a request to the other party to stop transmitting information by momentary interruption of the radio waves of the other party when requesting the other party to stop transmitting information.

The limit display section is for measuring and displaying the call time limit when receiving the request signal for stopping the information transmission.

(Example) Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a call time limit system in wireless communication according to the present invention.

In Figure 1, 101-103 are the first and second
, and the nth radio. Dimensions, 1-1~1-n
are microphones, 2-1 to 2-n are press switches, 3-1 to 3-n are transmitters, and 4
-1 to 4-n are respectively transmission time control units, S-1 to S
-n are coaxial relays, 6-1 to 6-n are special transmitting units, 7-1 to 7-n are limit display units,
8-1 to 8-n are receivers, 9-1 to 9-n are speakers, 10-1 to 10-n are feed lines, and 11-1 to 11-n are antennas.

The above symbols -1 + 2 + n, etc. are the first
, second, and n-th wireless transmitters 101, 102°10
Indicates that it is an element of 3.

Now, the first radio 101 is transmitting, and the second radio 1
It is assumed that the second radio device 102 to the nth radio device 103 are in a receiving state, and the second radio device 102 wants to request the first radio device 101 to stop transmitting information.

In the first radio device 101, the transmitter 3-1 is in operation due to the press switch 2-1, but it is assumed that, for example, 80 seconds have elapsed continuously after transmitting radio waves. The transmission time control unit 4-1 detects the elapsed time of 80 seconds, for example, 1
The operation of the transmitter 3-1 and the operation of the coaxial relay 5-1 are momentarily interrupted for only seconds. On the other hand, the second radio device 102 requests the first radio device 101 to stop transmitting.
Assume that the press switch 2-2 is operated momentarily, for example, for one second, at any time during the transmission of 01.

Note that the transmission time control unit 4-2 stores, via the transmission special unit 6-2, that the receiver 8-2 has been receiving until now. Therefore, at this time, press switch 2-2
The transmitter 3-2 does not operate due to this operation.

Therefore, the transmitter special unit 6-2 enters a standby state for receiving a momentary interruption detection signal of the received radio wave from the receiver 8-2, for example, for making an earth. In such a state, the first transmitter 3-1 is momentarily disconnected, so the second receiver 8-2 detects this state and connects the ground to the transmitting special unit 4-2. Send out makeup.

Therefore, the second transmitter 3-2 transmits radio waves for a predetermined period of time, for example, one second.

Since the first radio device 101 is in the receiving state at this time, it can receive the radio waves from the second transmitter 3-2. Upon this reception, the first special transmission section 6-1 can operate the restriction display section 7-1.

The operator of the first radio device 101 selects the first restriction display section 1-
By the action in step 1, it is learned that there is someone who is requesting the first radio device 101 to stop transmission early. Therefore, the operator of the first radio device 101 can immediately interrupt the transmission of information and listen to the wishes of the other party, or can briefly summarize the contents of the report and then interrupt the transmission of the information. can.

(Effects of the Invention) As explained above, the present invention provides a transmitting time control section in each radio to monitor the transmission time and set a listening time, thereby making it possible to request calls to radios other than the transmitting radio. If there is no call time, there is no limit to the call time, and if there is a request to make a call on a radio other than the transmitter, the operator who is transmitting is notified to that effect and the call time is effectively limited. The effect is that it can be done.

Therefore, it is possible to satisfy the usage wishes of the operators of each radio device, and to make effective use of radio waves.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment for realizing a call time limit system in wireless communication according to the present invention. 101-103 --- Radio equipment

Claims (1)

[Claims] a transmission time control unit for instantaneously interrupting transmission at every preset transmission time; Each of the plurality of wireless devices is provided with a transmission special unit for notifying the other party, and a limit display unit for measuring and displaying the call time limit when receiving the request signal to stop the information transmission. , a call time limit system in wireless communication configured to share the same radio frequency for transmission and reception so that bidirectional communication can be performed without any problems.