JPS601934A - Display device - Google Patents

Abstract

PURPOSE:To confirm visually with which zone a station is to be communicated in a selected talking channel by displaying talking zones possible for talking to all stations in the same group receiving a talking channel designation number from a control station. CONSTITUTION:In turning on a call zone code changeover switch SW1, a counter included in a detection controller DET-1 is activated by detecting the turning on and this operating state is displayed on a display device DISP via a display changeover device SW-2. In desiring talking with a station (b) in a radio zone 5 for examle, the call zone code changeover switch SW1 is kept turned on until the numeral ''5'' is displayed on the display device DISP, this numeral is stored in the display device DET-1 by turning off the switch SW1 when the numeral ''5'' is displayed, ''5'' is displayed on the display device DISP while the station (a) is awaiting, and also the calling zone code ''5'' is transmitted to a control station together with a group number to which the station (a) belongs by using the control channel.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Technical Field of the Invention The present invention relates to a display device, and particularly to a display device used in a multi-channel access (abbreviated as MCA) transmitting/receiving device.

(b) Prior art and problems In order to communicate between mobile units and between mobile units and business offices,
In addition to quickly and accurately configuring a high-quality wireless line, 1.
For effective use of wireless channels, the service range is divided into a plurality of zones, and one MCA control station is provided in each zone.

The size of this zone is determined by the service range in which the MCA control station can relay radio waves from mobile objects, etc., and is called a wireless zone. This wireless zone includes one or more groups (eg, companies, organizations, etc.) that receive the service.

According to the above MCA system, for example, when mobile station a in the 1st radio zone (() wants to make a call with a mobile station in the adjacent φ5 radio zone, this is done by the following sequence. .

■ Using the control channel, station a sends a communication request signal containing the number to which station a belongs and the zone code to which station b belongs to the φ1 control station whose service range is the wireless zone to which station a belongs. 'l Send using the TAL channel.

(2) When the φ1 control station receives this signal, it determines the communication channel to be used for the communication of the desired station.

■Su1 fJ! ! A channel designation number 1d containing the group number of station a, the zone code to which station b belongs, and the communication channel number is sent from the control station to station a using the control (Illll channel). When the 0■a station receives the 0-term signal, the channel designation signal is sent from the control station.
Talk to station b using 5 system φX1 station times and reasons.

■ End all calls within a set call time (for example, 1 minute). Then, it returns to the state of receiving one channel on the bow side diameter and enters the standby state.

As explained above, in mobile radio systems using the MCA system (in the past, station A was called a call zone (when a call channel was specified, the wireless zone where calls were possible at that point was called a call zone). I know that, but within the same group, a
Stations other than the station do not display the designated call zone code, so it is difficult to recognize this call zone. Therefore, even though stations other than station A in the same group can talk to the group to which station B belongs (of course, only within the set time after station A's call ends), they do not talk to station A. Wait for the call to end, and either perform the sequence from ■ to ■ above to make a call, or send a thermal call charge to a calling zone where you cannot make a call (the wireless zone to which the other party's station belongs when you wish to make a call is called a calling zone). Then there was a problem.

It is an object of the present invention to provide a display device that can efficiently display a call zone code not only to the station that made the request but also to other stations in the group to which the station belongs.

(d) Structure of the Invention The above object is to detect the operation of a paging zone code changeover switch in a multi-channel access transmitting/receiving device, and to display the paging zone code on a display via a display switch. means for extracting a call channel designation signal and a call zone code from the received radio waves from the control station; and operating the display switch by the call channel designation signal obtained from the extracting means to read the call zone code. This is achieved by providing a means for displaying the call zone code on the display, and a display device whose function is to operate the display switch again to display the calling zone code when the transmitting/receiving device detects the end of the call. be done.

(e) Examples of the invention FIG. 1 is a block connection diagram of an embodiment of the present invention.

In the figure, RX is a receiver, DET-3 is a communication channel designation signal detector, DET-2 is a communication zone code extractor, and DE
T-1 is a detection controller, 5W-2 is a display switch, 5W-1
is the calling zone code changeover switch, DISP is the display,
CON indicates a channel switching controller.

The connections between these blocks are as follows.

The input terminal of the communication channel designation signal detector DET-3 is connected to the antenna via the receiver RX, and the first output terminal is connected to the display switch SW-2 via the communication zone code extractor DET-2.
The second output terminals of the water landing switch SW-2 are respectively connected to the third input terminals of the water landing switch SW-2 via the channel switching controller CON. Also, the calling zone code changeover switch 5W-1 is connected to the first terminal of the display changeover device 5W-2 via the detection controller DET-1, and the output terminal of the display changeover device SW-2 is connected to the display device DISP. .

The operation of the display device connected in this way is as follows.

When the calling zone code changeover switch SW+k is turned ON, this is detected and a counter (not shown) included in the tjli output controller DET-1 operates, and this operating state is displayed on the display changeover 5W- 2 on the display device DISP. So, for example, if you wish to make a call to station b in wireless zone φ5, turn on the calling zone code changeover switch SW1 until the number "5'" is displayed on the display DISP, and when 151 is displayed, switch SW1 By turning off this number, the detection controller DET-
1, and while station a is on standby, the display DIS
151 is displayed on P, and the calling zone code "5" is displayed.
The call request signal mentioned in ``lr'' is sent to the ◆1 control station using the control channel together with the group number to which station a belongs.

On the other hand, as in item 0 above, a channel designation signal containing the group number to which station a belongs, the call zone code to which station b belongs, and the call channel number is sent from the φ1 control station to all stations in the group to which station a belongs. Sent using the control channel. This signal is reproduced by the reception ta RX, and when the communication channel designation number detector DET-3 detects channel designation No. 16 addressed to the group from a predetermined place in the reproduced data string, the communication channel designation number detector DET-3 detects channel designation number 16 addressed to the group. -3
The channel switching controller CON switches, for example, the oscillation circuit (not shown) of the transmitting/receiving device so that transmission/reception can be performed on the designated communication channel, and at the same time switches the display DI.
The display switching unit 5W-2 is controlled so that the SP calling zone code can be changed to the designated call zone code.

On the other hand, the playback signal that has passed through the saliva channel designation number detector DET-3 extracts the call zone code signal contained in another predetermined location by the call zone code extractor DET-2.
Extract and memorize it. This call zone code is then displayed on the display device DISP via the display switch 5W-2.

When the call ends, the reception input level monitored by the reception IM and rear RX becomes O, so the output from this detection circuit (not shown) makes it possible to receive the control channel again. Since the transmitter/receiver is switched and the display switch dw-2 is returned to its original state, the display DISP again displays the calling zone code stored in the detection controller DET-1.

(f) Effects of the Invention As explained above, in mobile radio communication using the MCA system, for example, the display of the calling zone code of station a is necessary only when station a requests a call; When another station makes a call request and a call channel is specified by the control station, it is important to know which zone the call can be made to using the specified call channel.

Therefore, as shown in the present invention, by displaying the call zone in which calls can be made to all stations within the same group that have received the call channel designation number from the control station, the control station can select which zone to call when switching to a call channel. Since it is possible to visually confirm whether a call can be made, a station that wishes to make a call to that zone can respond immediately, and it also prevents invalid calls to a zone where it is difficult to make a call. Can be done.

Further, by switching and using two related pieces of information on one display, it is also possible to eliminate the hardware.

[Brief explanation of the drawing]

FIG. 1 shows a block diagram of an embodiment of the present invention. In the figure, RX is a receiver, DET-3 is a communication channel designation signal detector, DET-2 is a communication zone code extractor, and DE
T=1 is the detection controller, 8W-2 is the display switcher, 5W-1
is the calling zone code changeover switch, DISP is the display,
CON indicates a channel switching controller.

Claims (1)

[Claims] means for displaying a calling zone code on a display device used in a multi-channel access communication system; means for extracting a calling channel designation signal and calling zone code from received radio waves from a control station; means for displaying the call zone code on the display by operating the display switch in response to a call channel designation signal; and when the transmitter/receiver detects the end of the call, the display switch is operated again to display the call. A display device characterized by displaying a zone code again.