JPS5936442A - State display system of radio device - Google Patents

Abstract

PURPOSE:To make effective use of a call time and to improve the contained traffic of a system, by starting a timer in interlocking with the receiving operation of a channel number receiving section and performing an alarming display before a prescribed notice assigning time is elapsed. CONSTITUTION:The own group of an MCA terminal station receives a calling with an outgoing control signal from a base station and an operating communication channel is instructed, in a state display system of a radio device performing a system call end predicting display where a line is cut off automatically after a call is elapsed for a prescribed time such as in a multi-channel access system (MCA) of two-frequency semi-duplex system. This signal is transferred to a frequency synthesizer 6, a transmission/receiving signal is selected, the channel changeover is attained automatically to bring the mode into the communicating state. When a receiving section receives the operating channel, a timer 3 (60sec) is started and the count of the elapsed time is started. A display signal generating section 4 starts at the point of 45-second, for example, an alarm tone is generated from a display 5 for a short time and the end call prediction is attained.

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) where the line is automatically disconnected after a certain period of time has elapsed. The present invention relates to a status display method for a wireless device that displays a preview.

Conventional configuration and its problems Consisting of a plurality of base stations and a plurality of terminal stations classified into groups, the radio channel between the base station and the terminal station consists 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 a communication channel. An MCA system is known that enables communication with terminal stations of the same group by relaying a base station 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, one 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 conventional art, the present invention provides a system to notify the caller of the elapsed time by an alarm before the call line is disconnected, to encourage conversation, and to terminate the call within a predetermined time. The purpose is to prevent traffic from decreasing.

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 summation allotment time elapses.

Description of examples The present invention will be explained 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 that generates a signal sound for announcing the end of a call, and 5 is a warning loudspeaker. The display used, 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 transmission/reception channel is selected, the channel is automatically switched, and a communication state is established.

When the receiving section 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, emitted multiple times, such as "binobik," or emitted continuously at regular intervals, or the level may be increased in sequence at regular intervals. Further, there are methods such as once at 45 seconds, twice at 50 seconds, continuously after 55 seconds, or a combination thereof.

In addition, 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 combination with an acoustic warning. However, 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 breath 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 in 2, according to the present invention, in the MCA system, a warning is issued to the user and a notice of termination is given before the end of the permissible call time. This system aims to end a call within a time period of 100 ms, which has the advantage of making effective use of call time and contributing to improving the capacity of the system, and has great industrial value.

[Brief explanation of the drawing]

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 generation section, 5...Display device.

Claims (1)

[Claims] It consists of a plurality of base stations and a plurality of terminal stations classified into groups, the radio 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 is a control channel. Broadcast various control signals,
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,
Each terminal station in the group communicates with the terminal stations in the same group by relaying the base station in a two-frequency half-duplex system using the assigned communication channel, and the communication channel assignment is forcibly disconnected at a certain time. On the other hand, the terminal station that has been assigned a call channel switches to the call channel, starts a timer for measuring the call time, and issues a pre-promised call end notice before the end of the predefined call time. A method of displaying the status of a wireless device by displaying means for displaying the status.