JPH0357659B2 - - Google Patents

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, high-quality wireless lines can be configured quickly and accurately, and the service range can be improved to make effective use of wireless channels. is divided into multiple zones, and each zone has one MCA control station.
The size of this zone is determined by the service range within 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-mentioned MCA system, for example, when a mobile station a located in the #1 wireless zone communicates with a mobile station b located in the adjacent #5 wireless zone, the following sequence is used.

Using the control channel, station A sends a communication request signal containing the group number to which station A belongs and the code of the radio zone (called a calling zone) to which station B, with which you wish to make a call, belongs, to the radio station to which station A belongs. Send the zone to the #1 control station that covers the service using the control channel.

When the #1 control station receives this signal, it communicates with the #5 control station whose service range is the #5 wireless zone to which the desired station B belongs, and uses it for calls between stations A and B. Each communication channel is determined, and each station can communicate with each other between wireless zones via the control station it is included in.

#1 A channel designation signal containing the number of the group to which station a belongs, the code of the wireless zone to which station b belongs, and the call channel number is sent from the control station to a.
sent to the station using the control channel. Similarly b
A channel designation signal is also sent to the station from the #5 control station. Here, the wireless zone of the partner station that can be spoken to from the control station is referred to as the call zone.

When station a receives the signal, it communicates with station b via the control stations #1 and #5 on the designated communication channel.

End the call within a predetermined call time (for example, 1 minute). The device then returns to the control channel receiving state again and enters the standby state.

As explained above, in the mobile radio system using the MCA system, conventionally, station A knows the calling zone, but each station in the same group other than station A does not display the specified calling zone code. So,
Unable to recognize this calling zone.

Here, despite high traffic like the MCA system, there are only a few call channels that can be allocated, and the important point is to make call reservations and complete as many calls as possible within the designated call time.

Therefore, if it is within the specified call time, station A and station B
Using the remaining call time after the end of the call with station A, other stations in the same group as station A can use the connected line to talk to stations in the group to which station B belongs. It's summery. Furthermore, each station has means for determining and displaying whether or not its own device is ready for communication based on a signal from the control station (for example, a channel designation number, a call termination signal).

However, even if another station in the same group as station A wants to talk to a station in the group to which station B belongs, the other stations do not know which wireless zones they can talk to, so the call time will be longer. Don't make calls even if you stay. Then, after the line was opened, the above ~
After carrying out the sequence up to this point, a conversation is made with a partner station in the group to which station b belongs. This is a waste of time for other stations and increases unnecessary traffic for the MCA system.

In addition, the number of invalid calls increases as calls are made by using the remaining call time to call and check the desired station without being able to confirm whether or not the desired station belongs to the wireless zone. .

That is, there is a problem in that the rate of effective use of communication channels decreases due to an increase in unnecessary traffic and an increase in invalid calls.

(c) Purpose of the Invention The present invention has been devised in view of the problems of the prior art described above, and is capable of efficiently transmitting the calling zone code not only to the station that made the request but also to other stations within the group to which the station belongs. The object is to provide a display device that can display images.

(d) Structure of the Invention The above object is to divide the service range into a plurality of wireless zones, provide a control station in each wireless zone, and, in response to a call request, control each wireless zone to which the desired station and the other party belong. In a transmitting/receiving device used in a multi-channel access system in which a station specifies a communication channel and each station in the wireless zone to which each station belongs can make a line connection for a certain period of time using the communication channel, sent via,
A call channel is specified by the call request, and a control signal including a radio zone code (callable zone code) to which the station that becomes talkable belongs, a group number to which the station that becomes talkable belongs, and a call channel number is received. a determining means for reproducing the group number to determine whether or not the group number belongs to the own station; and a display device for displaying the callable zone code when the determining means determines that the group number is the group number to which the own station belongs. This is achieved by providing a transmitting/receiving device characterized in that the user can determine the callable zone by the code displayed on the display.

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

In the figure, RX is the receiver, DET-3 is the call channel designation signal detector, DET-2 is the call zone code extractor, DET-1 is the detection controller, SW-2 is the display switch, and SW-1 is the caller. Zone code changeover switch, DISP means display, and CON means channel changeover control. In addition, DTE-3, DTE-2 and
CON and SW ₂ are constituent parts of the number/code extraction means and display switching means claimed in the claims.

The connections between these blocks are as follows.

The input terminal of the call channel designation signal detector DET-3 is connected to the antenna via the receiver RX, and the first output terminal is connected to the second input of the display switch SW-2 via the call zone code extractor DET-2. to the terminal, the second
The output terminals of are respectively connected to the third input terminals of the display switching device SW-2 via the channel switching controller CON. Also, calling zone code switch
SW-1 is connected to the first terminal of the display switch SW-2 via the detection controller DET-1 and the display switch SW-2.
The output terminals of each are 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 ₁ is turned on, this is detected and a counter (not shown) included in the detection controller DET-1 operates.
This operating state is displayed on the display device DISP via the display switch SW-2. So, for example, if you want to talk to station B in wireless zone #5, use the display.
Turn ON the calling zone code changeover switch SW ₁ until the number "5" is displayed on the DISP. When "5" is displayed, turn this switch SW ₁ off. This number can be changed to the detection controller DET-1. While station a is on standby, "5" is displayed on the DISP display, and the calling zone code "5" is sent as a call request signal along with the group number to which station a belongs to #1. It is sent to the control station using a control channel.

On the other hand, as mentioned in the above section, 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 #1 control station to all stations in the group to which station a belongs. sent using the control channel. This signal is reproduced by the receiver RX, and when the channel designation signal addressed to the group is detected from a predetermined position in the data string reproduced by the communication channel designation number detector DET-3, the communication channel designation number detector DET-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 specified communication channel using the signal from 3. At the same time, the channel switching controller CON switches the oscillation circuit (not shown) of the transmitting/receiving device so that the specified communication channel can be transmitted/received. The display switch SW-2 is controlled so that the zone code can be displayed.

On the other hand, the call channel designation number detector DET-3
From the reproduced signal that has passed through, a call zone code signal contained in another predetermined location is extracted by a call zone code extractor DET-2 and stored. This call zone code is then displayed on the display device DISP via the display switch SW-2.

When the call ends, the reception input level monitored by the receiver RX becomes 0, so the output from this detection circuit (not shown) switches the transmitting and receiving device to a state where it can receive the control channel again. , the display switch SW-2 is returned to its original state, so the display DISP again displays the calling zone code stored in the detection controller DET-1.

If, for example, "1" is initially displayed as the calling zone code in the other stations in the same group as station a, then the control signal will be received in the same way as station a due to the request operation of station a, and the display will show Code "5" will be displayed. Therefore, other stations can determine that the callable zone is the code "5" zone at that point. Then, when the callable time has passed, the code "1" is displayed again.

In this case, as described in the conventional example, the transmitting/receiving device used for MCA has a means for determining and displaying whether or not the own device is currently in a callable state. Even if the code of the callable zone is displayed, it is easy to determine which code is currently displayed.

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

Therefore, as shown in the present invention, by displaying call zones in which calls can be made to all stations within the same group that have received a call channel designation number from a control station, it is possible to talk to which zone when switching to a call channel. Since it is possible to visually confirm whether a call is being made to a zone, a station desiring to make a call to that zone can respond immediately, and invalid calls to a zone where calls are not possible can be prevented.

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

[Brief explanation of drawings]

FIG. 1 shows a block connection diagram of an embodiment of the present invention. In the figure, RX is the receiver, DET-3 is the call channel designation signal detector, DET-2 is the call zone code extractor, DET-1 is the detection controller, SW-2 is the display switch, and SW-1 is the caller. Zone code changeover switch, DISP means display, and CON means channel changeover control.

Claims (1)

[Scope of Claims] 1. The service range is divided into a plurality of wireless zones, a control station is provided in each wireless zone, and in response to a call request, each control station of the wireless zone to which the desired station and the other station belong establishes a call channel. In a transmitting/receiving device used in a multi-channel access system that specifies and connects a line so that each station in the radio zone to which each station belongs can talk for a certain period of time using the communication channel, the control station transmits data via the control channel. was done,
A call channel is specified by the call request, and a control signal including a radio zone code (callable zone code) to which the station that becomes talkable belongs, a group number to which the station that becomes talkable belongs, and a call channel number is received. a determining means for reproducing the group number to determine whether or not the group number belongs to the own station; and a display device for displaying the callable zone code when the determining means determines that the group number is the group number to which the own station belongs. A transmitting/receiving device comprising: a transmitting/receiving device, wherein a user can determine a callable zone based on a code displayed on the display.