JPH02104140A - Multichannel radio call receiver - Google Patents

Abstract

PURPOSE:To improve radio calling service by switching a current channel another channel to receive a radio call signal when the call number of a time slot previously allocated to a self-group is outside the range of the call number of the self-group at the time of receiving the radio call signal. CONSTITUTION:A control part 7 in a multi-channel radio call receiver reads out all channel numbers stored in a ROM 7a, controls the local oscillation frequency of a synthesizer 4 and waits and receives a call signal of the channel. At the time of decoding a signal from the detector 6 and detecting the frame synchronizing signal of the call signal, the time slot call number stored in the ROM 7a is detected and whether the number is included in the call number group of itself or not is decided. When the time slot call number allocated to the self-group is not included in the call numbers of the self-group, the current channel is switched. At the time of moving to another service area, a call signal to another receiver to which the same call number is allocated in the area is not terminated. Thus, radio calling service can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a multi-channel radio paging receiving device that selectively switches and receives radio signals of a plurality of channels from a radio base station to call a user.

BACKGROUND TECHNOLOGY In general, this type of multi-channel radio calling involves dividing one pre-assigned service area into multiple regions.
A radio base station is installed in each region, and this radio base station switches between a plurality of channels and transmits a radio paging signal to a multichannel radio paging receiver located in the region.

In this case, radio base stations in adjacent service areas are each configured to transmit paging signals on channels with different frequencies in order to prevent crosstalk and interference.

The multi-channel radio paging device in this building is carried by the user and used as a mobile station, and when it receives a paging signal of a predetermined channel from a radio base station in its service area, it emits a buzzer, vibrates, and displays a message. The system is configured to notify the user of an incoming call, etc.

Problems to be Solved by the Invention However, in the above multi-channel radio paging receiving device,
Since the system is configured to receive a paging signal of a predetermined channel from a radio base station located in the service area, if the user moves to another service area, the same paging number in that area will be used. There is a problem in that a paging signal is received for another receiving device to which the wireless paging device is assigned, and therefore, the wireless paging service is poor.

SUMMARY OF THE INVENTION In view of the above-mentioned conventional problems, it is an object of the present invention to provide a multi-channel radio paging receiving device that can improve radio paging services.

Means for Solving the Problems In order to achieve the above object, the present invention transmits data from a base station on multiple channels, and also assigns different groups of calling numbers to each time slot for each channel and service area. When a radio paging signal is received, it is determined whether the calling number of the time slot assigned in advance to the self is within the range of the calling number of the own group, and if it is outside the range, the other The system is designed to receive a call signal by switching to a channel.

Effect of the Invention With the above configuration, when the present invention moves to another service area, a paging signal to another receiving device assigned the same calling number in that area will not arrive, and therefore, the wireless paging service will be interrupted. can be improved.

EXAMPLES Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a multi-channel radio paging receiving device according to the present invention, and FIG. 2 is an explanatory diagram showing data set in the multi-channel radio paging receiving device of FIG. 3
1 is a flowchart for explaining the operation of the multi-channel radio paging receiver shown in FIG. 1, FIG. 4 is a schematic configuration diagram showing a system in which the multi-channel radio paging receiving device shown in FIG. is a flowchart for explaining the operation of the terminal station in FIG. 4, FIGS. 6 and 7 are explanatory diagrams showing a paging signal transmitted from the base station in FIG. 4, and FIG.
FIG. 8 is an explanatory diagram of the calling signal of FIG. 7;

First, a system in which this multi-channel radio paging receiver is used will be explained with reference to FIGS. 4 to 8.

In FIG. 4, 30 is a subscriber telephone that calls the multi-channel radio paging receiving device shown in FIG. a terminal station that performs radio paging control when the multi-channel radio paging receiving device is called via the terminal station 33;
1 to 333 are base stations that are installed in the calling area Al-A3 and transmit wireless paging signals under the control of the terminal station 32, respectively.

In the terminal station 32, the calling area and the time slot for each area are set in advance for each multi-channel radio paging receiving device number, and as shown in FIG.
When the multi-channel radio paging receiving device is called (step 41), the pre-stored calling number, calling area, and time slot for each area are read out (step 42), and each base station 331 to 333 is called. Send a signal.

Here, the number of the receiving device is 4 as illustrated in FIG.
,000 (group Gl-(bs)), and has calling areas A1 to A3.
□Up to 60,0 in the wide service area A
00 receiving device can be called.

As shown in FIG. 6, each of the base stations 331 to 333 transmits a paging signal on a plurality of channels F1 and F2- with different frequencies in order to prevent crosstalk and interference.
This call signal is sent to groups 01 to G, which differ for each channel.
15 numbers are assigned to each time slot TS1 to TS15, and as shown in FIG. 8, a frame periodic signal, an area number indicating service area A, and 15 coded call numbers are assigned to each frame. It is added and sent.

As shown in FIG. 7, in the case of another service area B, a paging signal in the same frequency band as that of service area A (channels Fl, F2~) is similarly transmitted, and this service area B A number that is different from the group number assigned to each time slot of each channel in service area B is transmitted in each time slot of each channel.

Next, returning to FIG. 1, the configuration of the multi-channel radio paging receiver according to the present invention will be explained.

In FIG. 1, 1 is a built-in antenna for receiving radio signals from base stations 334 to 333, 2 is a high-frequency amplification unit that amplifies the high-frequency signal received by the built-in antenna 1, and 3 is a high-frequency amplification unit that amplifies the high-frequency signal received by the built-in antenna 1. A mixer converts the amplified high frequency signal and a signal from a frequency synthesizer 4 (to be described later) into an intermediate frequency signal; 5 is an intermediate frequency amplifier that amplifies the intermediate frequency signal from the mixer 4; 6 is a mixer that converts the signal from the intermediate frequency amplifier 5 into an intermediate frequency signal; This is a detector that detects low frequency signals.

The frequency synthesizer 4 uses a read-only memory 9 (ROM
) 7a, the local oscillation frequencies for n t layers are outputted to the mixer 3 under the control of the control unit (CPU) 7, and the control unit 7 also outputs the local oscillation frequencies for n t layers stored in advance in the mixer 3 as shown in FIG. Controls the entire multi-channel radio paging receiver.

As shown in FIG. 2, R, 0M7 stores in advance n channels for receiving a calling signal, a time slot for each channel, a calling number, and a service area code.

8, the speaker 8a is driven under the control of the CPU 7 to emit a ringtone; 9, the green (R) LED is displayed when a call is made;
8 b blinks, red when not receiving frame synchronization signal of paging call from base station (LED 3c of uniform)
It is an alarm controller that lights up.

9 is an LCD driver for driving the channel display 9a, 10a is a reset switch (Rs-sw) for stopping the call display and buzzer sound, and 10b is a channel changeover switch for switching the channel of the call signal. (CH-8W), IOC is a power switch.

Next, the operation of the above embodiment, particularly the operation of the control section 7, will be explained with reference to FIG.

In step 11, all channel numbers stored in the ROM 7a are read out, and in step 12, the local oscillation frequency of the synthesizer 4 is controlled by the first number of the channel numbers, and a call signal for that channel is received in the standby mode.

In step 13, the signal from the detector 6 is decoded to determine whether or not a frame synchronization signal of the calling signal is detected, and if no frame synchronization signal is detected, the process proceeds to step 14 and a counter Tl is activated. This counter T
If l does not time up, return to step 12,
When the time is up, the process advances to step 15.

Note that this counter Tl is for establishing a frame of one channel, and is set to about 1 second, for example.

On the other hand, when a frame synchronization signal is detected in step 13, the process branches to step 20, in which the calling number of the time slot stored in the ROM 7a is detected, and in the subsequent step 21, it is determined whether the number belongs to the own calling number group. By determining , it is determined whether or not the own aircraft is located in its own service area.

Here, a serial calling number of 60,000 is 16
It can be transmitted in bits, and therefore it can be determined whether the detected number belongs to the group of the calling number itself or not based on the upper five bits of the signal.

If located in another service area, step 21
The process proceeds to step 15, where the counter T2 is started, and if the calling number of another group is detected a predetermined number of times, the process proceeds to step 15.

In step 15, the frequency synthesizer 4 is controlled to receive the calling signal of the frequency of the next channel, and the ROM
7. The above process is executed for the n number of channels preset in a (steps 16→12).

When the above processing is executed for n channels, the process proceeds to step 17, and by controlling the LCD driver 9, "0" indicating that all assigned channels are unreceivable is displayed on the channel display 9a. At the same time, the LED 3c is blinked.In the following step 18, the counter T3 is activated, and when this counter T3 times up (about 1 to 5 minutes), the process proceeds to step 19, where all counters T1, T2, and T3 are cleared. , the display "0" is stopped and the process returns to step 11.

Therefore, according to the above embodiment, even if the calling signal is for the channel assigned to the own device, if the calling number of the time slot assigned to the self does not belong to the calling number of the own device, the channel is switched. Therefore, when the user moves to another service area, it is possible to prevent the user from waiting for a channel in that area, and therefore to receive a paging signal from the base station in the own service area.

On the other hand, in step 21, when a paging signal from a base station in its own service area is detected, the process branches to step 23, and the time slot of the channel stored in the ROM 7a is read out, and the LCD is set to display the channel number. It controls the driver 9 and channel display 9a, clears all counters T111'2 and T3, and waits for a call based on the call number.

In step 25, when the own calling number is received, the process proceeds to step 26, where the speaker 8a is made to ring, the LE
The alarm controller 8 is controlled to blink D8b.

In the subsequent step 27, if the ringing time exceeds the time limit or the reset switch 10a is operated, the process advances to step 28, where the ringing is stopped and the process returns to step 11.

In the above embodiment, the number "0" is continuously displayed to indicate that reception is not possible.
The warning may be given using a tone or the like.

As described in detail, the present invention provides a wireless communication system that is transmitted from a base station over multiple channels, and in which calling numbers of different groups are assigned to each time slot for each channel and each service area. When a call signal is received,
It is possible to determine whether or not the calling number of the time slot assigned in advance to oneself is within the range of the calling number of the own group, and if it is outside the range, it is possible to switch to another channel and receive the calling signal. To prevent the arrival of a paging signal to other receiving devices assigned the same calling number in that area when moving to another service area, thus improving radio paging service. Can be done.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of a multi-channel radio paging receiving device according to the present invention, and FIG. 2 is an explanatory diagram showing data set in the multi-channel radio paging receiving device of FIG. 3 is a flowchart for explaining the operation of the multi-channel radio paging receiver of FIG. 1, FIG. 4 is a schematic configuration diagram showing a system in which the multi-channel radio paging receiver of FIG. 1 is used, and FIG. The figure is a flow chart for explaining the operation of the terminal station in Figure 4, and Figures 6 and 7 are for explaining the operation of the terminal station in Figure 4.
Explanatory diagram showing a paging signal transmitted from the base station in Fig. 8.
The figure is an explanatory diagram of the calling signal of FIG. 7. DESCRIPTION OF SYMBOLS 1... Antenna, 2... High frequency amplifier, 3... Mixer, 4... Seso-sizer, 5... Intermediate frequency amplifier,
6. Detector, 7. Control unit (CPU), 7a Read only memory (IL (, OM), 8. Alarm controller, 9 LCD driver, 9a Channel indicator (warning means). Name of agent: Patent attorney Awa Takashi Noshige and 1 other person 1st
Figure 2: Tomao to the Goth area

Claims (2)

[Claims] (1) Means for selectively receiving radio paging signals for each channel, which are transmitted from a base station in multiple channels and in which a different group of calling numbers is assigned to each time slot for each channel and each service area. and means for detecting a calling number of a time slot pre-allocated to the self from a radio paging signal of a channel received by the receiving means, and the calling number detected by the detecting means is within the range of the calling number of the own group. 1. A multi-channel radio paging receiving device, comprising: means for determining whether or not the radio paging signal is within the range, and controlling the receiving means to receive a radio paging signal of another channel if the receiving means is outside the range. (2) The calling number is composed of a serial number and is encoded and transmitted, and the control means determines whether the calling number of the own group is within the range of the calling number of the own group based on the upper few bits of the serial number detected by the detecting means. 2. The multi-channel radio paging receiving device according to claim 1, wherein the multi-channel radio paging receiving device determines whether or not there is a radio paging receiving device.