JPS6019333A - Press time limit releasing system - Google Patents

Abstract

PURPOSE:To improve the effect of press time limit by providing a detecting means detecting whether or not a continuous transmission time is a prescribed time or over to a mobile station and releasing the pass time limit by a control means for controlling a press time limit means and a transmission means by means of a release signal from a base station. CONSTITUTION:A processor 10 supervises whether or not an output signal (a) of a carrier detecting circuit 6 is at logical ''1'' normally and when the signal (a) is logical ''1'', the processor 10 judges that the mobile station 3 is brought into the transmission state and starts the count of an internal clock and then judges whether or not the signal (a) becomes logical ''0''. When the processor judges that the signal (a) becomes logical ''0'', the count value C is brought into [0]. When it is judged that the signal (a) is logical ''1'', whether or not the count value C is a prescribed value C1 or over is judged, and when it is judged as C>=C1, a mobile station number #N given to the mobile station 3 is added to a transmission section 8 and then the mobile station number #N is transmitted to a base station 1. Then the processor 10 brings the level of the output signal (b) to logical ''1'', interrupts an interrupting circuit 7 and then the mobiel station is brought into the untransmissible state.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field of the Invention The present invention relates to an improvement in a press time limit system, and more particularly to a press time limit canceling system in which the jitter time limit can be canceled by a release signal from a base station.

Prior Art and Problems A system in which information is transmitted and received between a base station and a plurality of mobile stations using a single channel (frequency) is applied, for example, to Tough 7-Unwired. In the case of a taxi,
Several dozen or more mobile stations are connected to one base station, and each mobile station alternately uses the same channel to transmit and receive information to and from the base station. Therefore, for example, if a failure occurs in one of the mobile stations and a signal continues to be transmitted that interferes with the communication of other mobile stations, or if a particular mobile station continues to transmit for a long time. In this case, other mobile stations cannot communicate with each other during that time, which has the disadvantage of causing serious problems in vehicle dispatching operations, etc.

In order to improve this drawback, conventionally, each mobile station is equipped with a press timer circuit, and when a mobile station transmits continuously for a certain period of time, the press timer circuit is activated and the mobile station becomes unable to transmit. However, it has the following drawbacks. That is, in the past, there was a fuse blowing type press time limit circuit that made the mobile station unable to transmit by fusing the fuse, or a time return circuit that electrically made the mobile station unable to transmit and automatically released the press time limit after a certain period of time had elapsed. A mold press timer circuit is used, but in the case of a fuse type, it is necessary to replace all the fuses, which is time-consuming, and in the case of a time return type, the press timer has the disadvantage that it is less effective. It was.

OBJECTS OF THE INVENTION The present invention is an attempt to improve the above-mentioned drawbacks.The purpose of the present invention is to enhance the effect of the press timer and to make it easier to release the press timer. Examples will be described in detail below.

Embodiment of the Invention FIG. 1 is a block diagram of an embodiment of the invention, in which 1 is a base station, 2 is an antenna, 6 is a mobile station, 4 is an antenna, 5 is a twin-blit, and 6 is a carrier wave detecting device. The carrier wave detection circuit 7 sets the output signal α to "1" while the signal is "1", and the carrier wave detection circuit 7 outputs a signal from the transmitter 8 while the signal is "1". Explain.

The processing device 10 constantly detects that the output signal α of the carrier wave detection circuit B is “
1" (step S1), and when the signal α becomes "1", it is determined that the mobile station 6 is in the transmitting state and starts counting the internal clock, and then the signal α It is determined whether or not the value has become "'0pa" (step S3
). If it is determined that the signal α is "0", the count value Ck rO,J is set (step 510), and the process returns to step S1.If it is determined that the signal α is "1", the count value Ck rO,J is set. It is determined in step S4 whether C is equal to or greater than a predetermined value C1. If it is determined that C<C1, the process returns to step S3. If it is determined that C≧C1, the movement given to the mobile station 6 is determined. Station number + Nf transmitter 8
In addition to this (step S5), the mobile station number +N is thereby sent to the base station 1 via the transmitter 8, cutoff circuit 7, carrier detection circuit 6, hybrid 5, and antenna 4. Next, the processing device 10 sets its output signal bf to "1" (step S6), and turns the cutoff circuit 7 into a cutoff state, thereby putting the p mobile station 3 into a transmission disabled state (press time limit state).

When canceling the press time limit of the mobile station B which has entered the press time limit state as described above, the base station 1 sends a release signal containing the mobile station number ΦN of the mobile station 3 and release information instructing the cancellation of the press time limit. Send out.

After entering the press time limit state, the processing device 10-: decodes the signal applied via the constant reception section 9, determines whether the received signal is a release signal addressed to the mobile station, and then sends the signal (step S7). ), if it is determined that the cancellation signal is addressed to the own mobile station, the count value C is set to 10'' (step S8), and then the signal is set to 0 (step S9). As a result, the p1 cutoff circuit 7 becomes conductive, the press time limit is released, and the post-processing device 10 returns to step S1.

Similarly, the release signal sent from the base station may be a tone signal or a digital signal, and the signal format can be arbitrarily selected. Although not explained in the above embodiment, the press time limit may be canceled after a certain period of time has passed after receiving the cancellation signal. Of course, it is also possible to completely cancel the press time limit after it has elapsed.

Effects of the Invention As explained above, the present invention has a detection means (in the embodiment, °C is a carrier wave detection circuit) for fully detecting whether or not the C transmission time has exceeded a certain time in connection with eight moving stations. 6. Processing device 10
(consisting of), a press timer (consisting of a cutoff circuit 7 in the embodiment) for making the mobile station unable to transmit or capable of transmitting, and a sending means (consisting of the cutoff circuit 7 in the embodiment) for transmitting the mobile station number (in the embodiment The system comprises a processing device 10, a transmitting section 8, etc., a decoding means (consisting of the processing device 10 in the embodiment) for decoding signals from the base station, and a control device for controlling the press timer means and the sending means. means (comprised of a processing device in the embodiment), and when the control means determines that it has received a release signal addressed to its own mobile station based on the decoding result of the decoding means, the control means activates all press time limit means. Since the mobile station is controlled to make the mobile station ready for transmission 43, and the press timer is released in response to a release signal from the base station, it has the advantage of increasing the effect of the press timer and also allows the press timer to be released. This has the advantage that the time limit can be easily released.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention, and FIG. 2 is a flowchart 1 showing the processing contents of the processing device 2. In FIG. 1 is a base station, 2 and 4 are antennas, 6 is a mobile station, 5 is a high print, 6 is a carrier detection circuit, 7 is a cutoff circuit, 8 is a transmitting section, 9 is a receiving fH section, and 10 is a processing device. Patent applicant Gobe Tamamushi, patent attorney representing Fujitsu Ten Ltd. (1 other person)

Claims (1)

[Claims] In a method of transmitting and receiving information between a base station and a plurality of mobile stations using one channel, each of the mobile stations has a detection means for detecting whether or not a continuous transmission time has exceeded a certain time. , a press timer for setting the mobile station in a transmitting disabled state or a transmitting enabled state, a transmitting means for transmitting the mobile station number of the own mobile station, a decoding means for decoding the signal from the base station, and the press timer means and a control means for controlling all of the sending means, and the control means controls all of the sending means to send the mobile station number when the detecting means detects that the continuous transmission time exceeds a certain time. Then, when the press timer is controlled to put the mobile station in a transmission-disabled state, and the base station puts the mobile station in a transmission-disabled state into a transmission-enabled state, the mobile station of the mobile station in a transmission-disabled state is A release signal including a number is sent, and when the control means determines that a release signal addressed to the mobile station has been received based on the decoding result of the decoding means, the control means controls the press timer to cause the mobile station to transmit. A press time limit release method characterized by making it possible.