JP2713454B2 - Multi-channel wireless call receiver - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-channel radio call receiving apparatus for selectively switching and receiving radio signals of a plurality of channels from a radio base station and calling a user.

2. Description of the Related Art In general, this type of multi-channel radio call divides one pre-allocated service area into a plurality of areas, installs a radio base station in each area, and locates the radio base station in that area. A plurality of channels are switched and a paging signal is transmitted to the multi-channel paging receiver.

In this case, each of the wireless base stations in the adjacent service areas is configured to transmit a paging signal on a channel having a different frequency in order to prevent interference and interference.

This type of multi-channel radio paging apparatus is carried by a user and used as a mobile station. When a paging signal of a predetermined channel is received from a radio base station in its service area, a buzzer, vibration, display It is configured to notify the user of the incoming call by the above method.

SUMMARY OF THE INVENTION However, since the above-mentioned multi-channel radio pager is configured to receive a paging signal of a predetermined channel from a radio base station located in the service area, the user can use the paging signal. Even if it is located in the service area, the call signal from the wireless base station does not arrive. For example, when moving to the shadow of a building or an underground mall, it is not possible to receive a call, so that there is a problem that the service of the wireless call is poor. .

SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-described conventional problems, and has as its object to provide a multi-channel wireless call receiving apparatus capable of improving a wireless calling service.

Means for Solving the Problems To achieve the above object, the present invention provides a first switch for selecting a channel of a radio paging signal transmitted from a base station in multiple channels, and a radio paging signal from the base station. And a second switch for stopping the notification when the own calling number is detected from the first switch. When the first switch is operated while the second switch is operated, the second switch is received. The channel is switched to the next channel.

Operation The present invention can receive a paging signal of a channel having a large electric field strength according to the above configuration, and switch channels by a combined operation of the first switch and the second switch. Switching can be prevented, and therefore, the service of wireless paging can be improved.

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of a multi-channel radio pager according to the present invention, FIG. 2 is an explanatory diagram showing data set in the multichannel radio pager of FIG. 1, and FIG. FIG. 1 is an external view showing the multi-channel radio pager of FIG. 1, FIG. 4 is a flowchart for explaining the operation of the multichannel radio pager of FIG. 1, and FIG. FIG. 6 is a schematic configuration diagram showing a system in which the multi-channel radio pager is used, FIG. 6 is a flowchart for explaining the operation of the terminal station in FIG. 5, and FIGS.
Explanatory diagram showing a call signal transmitted from the base station of FIG. 5,
FIG. 9 is an explanatory diagram of the calling signal of FIG.

First, a system in which this multi-channel radio pager is used will be described with reference to FIGS.

In FIG. 5, reference numeral 30 denotes a subscriber telephone for calling the multi-channel radio call receiver shown in FIG. 1, reference numeral 31 denotes a telephone station in which the subscriber telephone 30 is accommodated, and reference numeral 32 denotes a telephone station 31 end station for the wireless call control when you call a multi-channel radio call receiving device via, respectively 33 _to 333, installed in the calling area a ₁ to a _3, radio paging by the control of the terminal station 32 It is a base station that transmits signals.

In the terminal station 32, the calling area and the time slot for each area are set in advance for each number of each multi-channel radio call receiving apparatus, and as shown in FIG. When the channel paging receiver is called (step 41), the call number, the calling area and the time slot for each area stored in advance are read (step 4).
2), and it sends a calling signal to each base station 33 _to 333.

Here, the number of the receiving device is, as exemplified in FIG.
Grouping is performed every 4,000 (groups G _{1 to} G ₁₅ ), and assigned so that a maximum of 60,000 receiving devices can be called in a wide service area A having calling areas A _{1 to} A ₃ .

Then, each base station 33 _to 333, as shown in FIG. 8, in order to prevent interference or interference, transmits a call signal different channels F _1, F ₂ at ~ frequency,
This call signal, the group G ₁ ~G ₁₅ different for each channel
Is assigned to each of the time slots TS1 to TS15. As shown in FIG. 9, a frame synchronization signal and an area number indicating the service area A are added to each frame and transmitted.

In addition, as shown in FIG. 8, a paging signal of the same frequency band (channels F ₁ , F ₂ 〜) as that of the service area A is transmitted also in the case of the other service area B.

Next, returning to FIG. 1, the configuration of the multi-channel radio pager according to the present invention will be described.

In Figure 1, 1 is built-in antenna for receiving radio signals from the base station 33 _to 333, 2, built-in antenna 1
A high-frequency amplifier that amplifies the high-frequency signal received by the
Reference numeral 3 denotes a mixer for converting the high-frequency signal amplified by the high-frequency amplifier 2 and a signal from a frequency synthesizer 4 to be described later into an intermediate frequency signal. Reference numeral 5 denotes an intermediate frequency amplifier that amplifies the intermediate frequency signal from the mixer 4; Intermediate frequency amplifier 5
This is a detector that detects a low-frequency signal from a signal from the detector.

The frequency synthesizer 4 has a read-only memory (ROM) 7a for selectively receiving multi-channel (for example, several hundred channels) radio signals from the radio base station for each channel.
And outputs the local oscillation frequencies for n channels stored in advance to the mixer 3 under the control of the control unit (CPU) 7. The control unit 7 receives the multi-channel radio call reception as shown in FIG. Controls the entire device.

As shown in FIG. 2, the ROM 7a stores in advance n channels for receiving a call signal, a time slot for each channel, a call signal, and a service area code.

Reference numeral 8 denotes a case in which the speaker 8a is driven by the control of the CPU 7 to sound a ringing tone, a green (R) LED 8b is blinked at the time of calling, or a frame synchronization signal of a calling signal from the base station is not received. The alarm controller turns on the red (R) LED 8c.

9 is an LCD driver for driving the channel display 9a, 10a is a reset switch (RS-SW) for stopping the ringing display and buzzer sound, and 10b is a channel switch for switching the channel of the ringing signal. (CH-SW),
10c is a power switch.

The channel changeover switch 10b is, as shown in FIG.
It is turned on when it is attached to the side of the housing and pressed down.It also has a reset switch 10a and a power switch 10c.
The actuator is configured in common and mounted on the top surface of the housing.When the actuator is pressed, the reset switch 10a is turned on, and when the actuator slides, the power is turned off, the power is turned on, and the power is turned on. In this state, the volume of the speaker 8a is adjusted in three stages.

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

In step 11 shown in FIG. 4 (a), all the channel numbers stored in the ROM 7a are read, the local oscillation frequency of the synthesizer 4 is controlled by the first of these channel numbers, and the call signal of the channel is received and received. .

In step 12, the signal from the detector 6 is decoded to detect the frame synchronization signal of the paging signal, and the area number following the frame synchronization signal is compared with the service area code stored in the ROM 7a to determine the paging service. It is determined whether the area can be received.

Then, upon receiving its own calling number, the process proceeds to step 14, where the alarm controller 8 is controlled so as to sound the speaker 8a and blink the LED 8b.

In step 13, when the time of the calling signal times out, or when the reset switch 10a is operated in step 15, the process proceeds to step 16, stops the calling, and returns to step 11.

On the other hand, as shown in FIG.
b or when the reset switch 10a is pressed alone, the standby state is continued (steps 17 and 18), and when the channel switch 10b is pressed while the reset switch 10a is continuously pressed, the step The process proceeds from step 19 to step 20 to control the frequency synthesizer 4 so as to receive a call signal of the frequency of the channel next to the channel stored in the ROM 7a.

In the following step 21, it is determined whether or not the signal from the detector 6 is decoded to detect the frame synchronization signal of the calling signal.
While branching to 22 and 23, the channel display 9a displays "0" indicating that the channel is unreceivable,
Make LED8c blink.

Hereinafter, each time the channel switch 10b is pressed while the reset switch 10a is continuously pressed,
When the next channel is switched to standby and the frame synchronization signal is detected, the process proceeds from step 23 to step 24, and the channel is displayed on the channel display 9a.

Then, when the channel changeover switch 10b is pressed alone while the frame synchronization signal of this channel is being detected, the LED 8b blinks without switching the channel to notify the user of the malfunction.

Therefore, according to the above embodiment, the reset switch
When the channel switch 10b is pressed while the button 10a is continuously pressed, the channel is switched, so that careless channel switching by the user can be prevented.

Effect of the Invention As described above, according to the present invention, when a message is received from the other party, first, the notification of the notification means (for example,
By operating the second switch for stopping the ringing, and subsequently operating the first switch for selecting the channel by the user, the channel received by the receiving means is changed to the next channel. Since switching to the channel, it is possible to receive a message from the other party next time and prevent the already displayed message content from being overwritten and erased by a simple operation, and also to prevent careless channel switching This has the effect that it can be prevented.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a multi-channel radio pager according to the present invention. FIG. 2 is an explanatory diagram showing data set in the multichannel radio pager of FIG. FIG. 3 is an external view showing the multi-channel radio paging receiver of FIG. 1, FIG. 4 is a flowchart for explaining the operation of the multi-channel radio paging receiver of FIG. 1, and FIG. FIG. 6 is a schematic configuration diagram showing a system in which the multi-channel radio pager shown in FIG. 5 is used. FIG. 6 is a flowchart for explaining the operation of the terminal station shown in FIG. 5, and FIGS.
FIG. 9 is an explanatory diagram showing a call signal transmitted from the base station in FIG. 5, and FIG. 9 is an explanatory diagram of the call signal in FIG. 1 ... antenna, 2 ... high frequency amplifier, 3 ... mixer,
4 ... Synthesizer, 5 ... Intermediate frequency amplifier, 6 ... Detector, 7 ... Control unit (CPU), 7a ... Read only memory (ROM), 8 ... Alarm controller, 9 ... LCD driver, 9a ... Channel indicator (warning means).

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Seiji Nishikawa Nippon Telegraph and Telephone Corporation, 1-6-1, Uchisaiwaicho, Chiyoda-ku, Tokyo (56) References JP-A-62-245738 (JP, A) JP-A Sho 63-226123 (JP, A)

Claims (1)

(57) [Claims] 1. A means for selectively receiving a radio paging signal transmitted from a base station on multiple channels for each channel, a first switch for selecting a channel to be received by the receiving means, and the receiving means Means for notifying when the self-call number is detected from the received radio call signal,
A second switch for stopping the notification of the notifying unit, and a channel received by the receiving unit when the first switch is operated when the second switch is operated. Means for switching to the next channel.