JPS6359617B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a system such as a two-frequency half-duplex multi-channel access system (MCA) in which the line is automatically disconnected after a certain period of time has elapsed. The present invention relates to a status display method of a wireless device that performs display.

Configuration of the conventional example and its problems Consisting of a plurality of base stations and a plurality of terminal stations classified into groups, the wireless channel between the base station and the terminal station is composed of at least one control channel and a plurality of communication channels. The base station broadcasts various control signals on the control channel, and the terminal station accesses the control channel of the base station and receives a call channel assignment according to the group to which the terminal station belongs, and each terminal station in the group is assigned. An MCA system is known that enables communication with terminal stations of the same group by relaying base stations in a two-frequency half-duplex system over a communication channel.

In this type of MCA system, in order to ensure system fairness for each group and improve traffic, each call is limited to one minute, and the line is automatically disconnected after this one minute has elapsed. Therefore, the conversation becomes half-hearted and it is necessary to make a call again to continue the conversation. However, this has the problem of not only wasting time but also increasing traffic.

Purpose of the Invention In order to eliminate the above-mentioned drawbacks of the prior art, the present invention provides an alarm to notify the caller of the elapsed time before the call line is disconnected, to encourage conversation, and to terminate the call within a predetermined time. The purpose is to prevent a decline in traffic.

Structure of the Invention The present invention is intended to start a timer in conjunction with the reception operation of the channel number reception section, and to display a warning (including audio) before a predetermined allotted time has elapsed.

DESCRIPTION OF EMBODIMENTS The present invention will be described below by way of an embodiment thereof with reference to the drawings. In the drawing, 1 is an input terminal for data input from a control channel receiver, 2 is a call channel receiver, 3 is a timer, 4 is a display signal generator with a signal sound for announcing the end of a call, and 5 is a warning loudspeaker. 6 is a frequency synthesizer.

Next, the operation will be explained.

The MCA terminal station receives a call from its own group using a downlink control signal from the base station, and this control signal instructs the communication channel to be used. This signal is transferred as a sequential, digital signal to the frequency synthesizer 6, where a transmitting/receiving channel is selected, and the channel is automatically switched to establish a talking state.

When the reception unit receives the used channel, it starts a timer 3 consisting of a 60-second timer and starts counting the elapsed time. Then, for example, at the 45-second mark, the display signal generator 4 is activated to generate an alarm sound from the short-time display 5 to give notice of the end of the call. This end-of-talk warning sound may be emitted once for a short time, or may be emitted multiple times, for example, at regular intervals, and the level may be increased sequentially at regular intervals. Also,
There are methods such as once at 45 seconds, twice at 50 seconds, continuously after 55 seconds, or a combination of these.

Further, display methods include an optical method in which a call lamp is displayed at the time of switching the call channel and the lamp flashes, a method in which other lamps are flashed, and a method in which the call lamp is used in conjunction with an acoustic warning. Furthermore, the start point of the timer 3 may be set not at the channel assignment signal receiving point but at the synchronization signal when receiving the channel assignment or the ON point of the pre-talk switch (PS) at the time of making a call. The point is that it is sufficient to warn the user by using an audible or optical display before the end of the permissible call time.

Effects of the Invention As explained above, according to the present invention, the MCA
In this system, a warning is issued to the user before the end of the permissible call time to give notice of the end of the call, which is intended to encourage calls and end the call within a predetermined time. It has the advantage of being useful for effective utilization and contributing to improving the storage capacity of the system, and has great industrial value.

[Brief explanation of drawings]

The drawing is a block diagram of a device to which a wireless device status display method according to an embodiment of the present invention is applied. 1... Input terminal, 2... Call channel receiving section, 3... Timer, 4... Display signal generating section, 5
……display.

Claims (1)

[Claims] 1 Consisting of a plurality of base stations and a plurality of terminal stations classified into groups, a wireless channel between the base station and the terminal station consists of at least one control channel and a plurality of communication channels, and the base station has a control channel. The terminal station accesses the control channel of the base station and is assigned a communication channel according to the group to which the terminal station belongs, and each terminal station in the group receives two communication channels on the assigned communication channel. While communicating with terminal stations of the same group by relaying the base station in a frequency half-duplex method, and forcibly disconnecting the communication channel assignment after a certain period of time,
The terminal station that has been assigned a call channel switches to the call channel, starts a timer for measuring the call time, and, before the end of the pre-specified call time, sends a pre-arranged notice of the end of the call. A method of displaying the status of a wireless device using a display means.