JP2000324525A - Individual call receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable even a receiver of an individual call system, wherein a complete synchronous time correcting function is not set, to automatically make accurate time correction without user's operation. SOLUTION: The individual call receiver 10 is adaptive to the services of a POCSAG(postoffice code standardization group) system for a service company where the cover areas of the POSCSAG system and a FLEX (high-level radio calling) overlap with each other and equipped with an RF unit which selectively receives a signal of the POCSAG system and a signal of the FLEX system, a decoder 13, an internal timer 15 which clocks the time according to time information provided by the FLEX system, and a CPU 14 which receives time information provided in transmission timing stored in the FLEX system not in the operation timing of a receiving means of the POCSAG system according to the time contents of the internal timer 15 and corrects the time contents of the internal timer 15 by using the obtained time information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an individual paging receiver having a time correction function.

[0002]

2. Description of the Related Art POCSAG, which has been more widely used than before
(Post Office Code Standard
An individualized paging receiver of the iZation Association Group) is an advanced paging system (RCR STD-43 standard) (hereinafter referred to as “FL”), which has recently become popular.
The EX format is abbreviated, and the area to which the time correction information is added in the data format is not set, and the area to transmit the time correction information asynchronously is not set.

[0003] For this reason, it is general that the user manually adjusts the time in the POCSAG system receiver. In some cases, even in the POCSAG system receiver, a special format is defined in the message area. There is a model that corrects the time.

[0004]

However, when performing accurate time correction manually, time information is obtained by using another communication means for notifying time, such as a telephone time service, and the time information is obtained. The correction has to be performed on the basis of this, and the operation is very complicated and easy to make a mistake.

[0005] Further, even for a model that transmits the above-mentioned special format as a message, although the operation is simpler than the case of performing the above-mentioned manual, it is necessary to perform accurate time correction since it is asynchronous. Was difficult.

[0006] The present invention has been made in view of the above-described circumstances, and an object of the present invention is to use a receiver of an individual paging method in which a completely synchronous time correction function is not set. It is an object of the present invention to provide an individual call receiver capable of automatically executing accurate time correction without bothering the user.

[0007]

According to the first aspect of the present invention,
The first individual paging method that does not provide the completely synchronous time information and the first individual paging method that provides the completely synchronous time information. An individual paging receiver corresponding to an individual paging method service, comprising: first receiving means for receiving a signal in the first individual paging method; and a second receiving means for receiving a signal in the second individual paging method. (2) receiving means, storing means for storing the transmission timing of the time information provided by the second individual calling method, time measuring means for measuring the current time, and the first means based on the timed content of the time measuring means.
Switching means for selecting and switching the second receiving means outside the operation timing of the receiving means and at the transmission timing stored in the storage means to receive the provided time information, and the time obtained by the switching means And a time correction means for correcting the clock content of the clock means using the information.

With such a configuration, the first individual paging system such as the POCSAG system which does not provide the completely synchronous time information, and the second individual system such as the FLEX system which provides the completely synchronous time information are not provided. An individual paging receiver corresponding to the service of the first individual paging method, which is provided by a service provider in which each coverage area of both of the individual paging methods overlaps, wherein the self-frame of the first individual paging method is provided. Since the time is switched to the second individual calling method at the timing and accurate time information is acquired and time correction is performed, a receiver corresponding to the individual calling method which is not originally provided with a completely synchronous time correction function is provided. Even if it does, it is possible to automatically and accurately execute the time correction without bothering the user.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to a service provider in which the coverage areas of both the POCSAG system which does not provide fully synchronous time information and the FLEX system which provides fully synchronous time information are duplicated. An embodiment in which the present invention is applied to an individual paging receiver corresponding to a POCSAG service is described with reference to the drawings.

FIG. 1 shows a circuit configuration of an individual call receiver 10 as a portable terminal. In FIG. 1, an individual call receiver 10 includes an antenna 11, an RF unit 12, a decoder 13, a CPU 14, an internal clock 15, a non-volatile memory 16, a RAM 17, and a P-programmable ROM 1.
8, key input unit 19, display driver 20, LCD 21,
It comprises a notification driver 22, an LED 23, a vibrator 24, a speaker 25 and the like.

The antenna 11 receives data transmitted from a transmitting antenna of a base station of an individual call service provider (not shown) and outputs the data to the RF unit 12.

The RF unit 12 includes a decoder 13 and C
The PU 14 is connected to the PU 14 and selectively switches and tunes a plurality of preset frequencies, performs demodulation and detection of received data, and selectively outputs the obtained data to the decoder 13.

After the CPU 14 compares the address data in the received signal with the address data registered in the nonvolatile memory 16 by the CPU 14, the decoder 13 receives a detection signal output at the time of matching from the CPU 14. It has a function of instructing the RF unit 12 to continuously receive a frame in a signal including the address data.

The CPU 14 performs overall operation control such as reception, notification, and display of message data addressed to itself according to an operation program stored in the P-ROM 18, or time correction described later.

The internal clock 15 clocks current time information, and the CPU 14 corrects the clock value.

The nonvolatile memory 16 is, for example, an EEPROM.
M, and has an area in which a plurality of ID address data for the POCSAG system and the FLEX system are fixedly written. The RAM 17 has a work area for temporarily storing processing data of the CPU 14 and a message data area for storing received message data. At least the message data stored in the message data area is in a power-on state. Power is backed up regardless.

The P-ROM 18 has a character generator for reading dot pattern data of a character corresponding to the operation program of the CPU 14 and the code data.

The key input unit 19 has keys for instructing power-on, mode change setting, display and switching of received message data, and the like.

The display driver 20 is a dot matrix type LCD based on display data from the CPU 14.
21 is driven to display and output the received message data, comments, warnings, and the like.

The notification driver 22 drives one or all of the LED 23, vibrator 24, and speaker 25 selected by the user, and notifies that there is an incoming call addressed to itself by flashing light, vibration, and ringer. Notify by sound or the like.

Next, a detailed configuration of the RF unit 12 and the decoder 13 will be mainly described with reference to FIG.

As shown, the RF unit 12 comprises a PLL.
It has a synthesizer RF circuit 12a and a switch 12b, executes a preset receiving operation at a frequency assigned to the POCSAG system or the FLEX system based on a control signal from the CPU 14, and converts received data. Similarly, the signal is sent to the decoder 13 via the switching unit 12b which performs switching control by a control signal from the CPU 14.

The decoder 13 is a POCSAG decoder 1
3a and a FLEX decoder 13b.
The received data of the POCSAG system switched and selected in 2b is decoded by the POCSAG decoder 13a and
4 and received by the FLEX system, which is also switched and selected by the switch 12b.
And sent to the CPU 14.

Next, the operation of the above embodiment will be described.

First, when the power is turned on by operating the power switch provided on the key input section 19, mainly C
FIG. 3 shows the control operation by the PU 14.

At the beginning of the operation, the CPU 14 first sets the RF
The control signal to the PLL synthesizer RF circuit 12a and the switch 12b of the unit 12 sets the reception frequency in the FLEX system to the PLL synthesizer RF circuit 12a (step A01), and operates the FLEX decoder 13b side of the decoder 13 by Establish synchronization in the FLEX system by receiving data from the nearest base station (step A)
02).

Since the FLEX system is a synchronous system,
As long as the internal clock does not go out of sync, it will not be out of sync for some time,
Here, the control signal to the PLL synthesizer RF circuit 12a and the switch 12b of the RF unit 12 again
This time, the reception frequency in the POCSAG system is switched and set to the PLL synthesizer RF circuit 12a (step A0).
3) Operate the POCSAG decoder 13a side of the decoder 13 and receive P from the nearest base station.
Establish synchronization in the OCSAG scheme (step A0)
4).

Then, a self-frame is detected based on the address data stored in the P-ROM 18 (step A05), and an incoming call is detected in the self-frame (step A06). After performing processing such as notification and display corresponding to the received data (step A10), the flow returns to the detection of the own frame from step A05 again.

If it is determined in step A06 that an incoming call addressed to the own frame has not been detected in the own frame, the control signal to the PLL synthesizer RF circuit 12a and the switch 12b of the RF unit 12 is again transmitted. The receiving frequency in FLEX system is set to PLL synthesizer RF
The setting is switched to the circuit 12a, and the FLEX decoder 13b side of the decoder 13 is operated (step A07).
It is determined whether it is the transmission timing of the preset time information (step A08).

If it is not the transmission timing, the next POC
It is determined whether or not the timing of the self-frame of the SAG method has come (step A09). If it is determined that the timing has not been reached, the process returns to step A08 again.

By repeating the processing of steps A08 and A09 in this manner, the system waits for the transmission timing of the time information in the FLEX system until the timing of the next POCSAG self-frame.
If it is determined in step A09 that the timing of the POCSAG self-frame has come before the time information transmission timing of the FLEX system has come, the flow returns to the POCSAG self-frame incoming detection processing from step A03 at that time.

As described above, at the timing of the own frame of the POCSAG system, the above-described step A is performed when it is determined that there is no incoming call while detecting the incoming call addressed to the own device.
The flow shifts to the processing from 07 to A09, and waits for the transmission timing of the time information in the FLEX method.

When it is determined in step A08 that the time for transmitting the time information has come, the time information is received and an accurate correction process for the current time held by the internal clock 15 is executed (step A11). Then, the process of FIG. 3 is completed, and the process shifts to a normal standby state.

Next, a description will be given, with reference to FIG. 4, of a process in a state of waiting for an incoming call after the time is corrected for the internal clock 15 as described above.

That is, initially, the RF unit 1
2 PLL synthesizer RF circuit 12a and switch 12b
, The reception frequency in the POCSAG system is set by the PLL synthesizer RF circuit 12a, and the POCSAG decoder 13a side of the decoder 13 is operated.
It is determined whether there is an incoming call in the POCSAG system by receiving data from the nearest base station (step B01),
If not, the processing of checking the contents of the internal clock 15 (step B02) and judging whether or not the time has become the time to correct the time information (step B03) is repeatedly executed to thereby receive an incoming call to the own device. Waits until there is a time or when the time information should be corrected.

When it is determined in step B01 that there is an incoming call addressed to the own device, a normal reception process is executed each time (step B11), and the process returns to step B01.

When it is determined in step B03 that the time to correct the time information has come, the RF unit 1
2 PLL synthesizer RF circuit 12a and switch 12b
The reception frequency in the FLEX system by the control signal to
The switch is set to the L synthesizer RF circuit 12a (step B04), and the FLEX decoder 13b side of the decoder 13 is operated to receive F from the nearest base station by receiving data.
The LEX synchronization is established (step B05).

In this state, it is determined whether or not it is a preset time information transmission timing (step B0).
6) If it is not the transmission timing, it is determined whether or not it is the timing of the next frame of the POCSAG system (step B07). POC
It waits for the timing of its own frame of the SAG method.

When it is determined in step B07 that the timing of the own frame has come, the RF unit 12
In response to the control signal to the PLL synthesizer RF circuit 12a and the switch 12b, the receiving frequency in the POCSAG system is set again in the PLL synthesizer RF circuit 12a (step B08), and the switch 12b is switched to the POCSAG decoder 13a side of the decoder 13 (Step B)
09), POC by receiving data from the nearest base station
The synchronization by the SAG method is established (step B10).

Then, the self-frame is detected based on the address data stored in the P-ROM 18 (step B14), and the incoming call is detected in the own frame (step B15). Then, processing such as notification and display corresponding to the received data is performed (step B16), and F from step B04 is performed again.
Return to the processing after switching to the LEX system.

When it is determined in step B06 that the time information transmission timing has come, the time information is received and an accurate correction process is performed on the current time held by the internal clock 15 (step B12). Again, the PLL synthesizer RF circuit 12a of the RF unit 12
The receiving frequency in the POCSAG system is switched and set to the PLL synthesizer RF circuit 12a according to the control signal to the switch 12b (step B13), and the process returns to the step B01.

The transmission timing of the time information for time correction in the FLEX system occurs at a frequency of, for example, about once an hour, but the internal clock 15 measures the time every hour. There is no such a case that the time information of the received frame is greatly deviated, and the detection timing of the own frame is not completely deviated. It is sufficient to perform the time correction process about once a day. The series of processing shown is processing in a very short time of day, and the time correction processing can be omitted in other time zones.

After the time information correction process is executed by the process shown in FIG. 3 when the power is turned on, the process shown in FIG. 4 is executed after a predetermined time interval to correct the time information again. Thus, the degree of deviation of the internal clock 15 within the predetermined time may be calculated, and thereafter, the time of the internal clock 15 may be corrected based on the calculated correction value.

In the present embodiment, the POCS
The case has been described where the present invention is applied to an individual paging receiver corresponding to the service of the POCSAG system for a service provider having the same coverage area in both the AG system and the FLEX system. However, the present invention is not limited to this. The first individual paging method for a service provider in which the respective coverage areas of both the first individual paging method that does not provide the time information of the formula and the second individual paging method that provides the time information of the completely synchronous method overlap. It goes without saying that the present invention is applicable to any individual paging receiver that supports paging service.

In addition, the present invention can be variously modified and implemented without departing from the gist thereof.

[0046]

According to the first aspect of the present invention, the first individual paging system such as the POCSAG system which does not provide the completely synchronous time information and the FLEX system which provides the completely synchronous time information are not provided. An individual paging receiver corresponding to the service of the first individual paging method of a service provider in which each of the cover areas of the second individual paging method overlaps with each other, wherein Switching to the second individual paging method at the timing of the own frame to acquire accurate time information and execute time correction, so that it corresponds to the individual paging method which is not originally provided with a fully synchronous time correction function. Receiver
It is possible to automatically and accurately correct the time without bothering the user.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an overall circuit configuration according to an embodiment of the present invention.

FIG. 2 is a block diagram mainly showing a detailed circuit configuration of an RF unit and a decoder in FIG. 1;

FIG. 3 is an exemplary flowchart showing the contents of an operation process when the power is turned on according to the embodiment;

FIG. 4 is an exemplary flowchart showing the contents of an operation process from a call waiting state according to the embodiment;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Individual call receiver 11 ... Antenna 12 ... RF unit 12a ... PLL synthesizer RF circuit 12b ... Switch 13 ... Decoder 13a ... POCSAG decoder 13b ... FLEX decoder 14 ... CPU 15 ... Internal clock 16 ... Non-volatile memory 17 ... RAM 18 ... P-ROM 19 ... Key input unit 19 20 ... Display driver 21 ... LCD 22 ... Notification driver 23 ... LED 24 ... Vibrator 25 ... Speaker

Claims (1)

[Claims] 1. A first method which does not provide time information of a completely synchronous type.
Individual call reception corresponding to the service of the first individual call method of a service provider whose coverage areas of both the individual call method and the second individual call method for providing time information of perfect synchronization are overlapped. A first receiving means for receiving a signal in the first individual paging method, a second receiving means for receiving a signal in the second individual paging method, and the second individual Storage means for storing the transmission timing of the time information provided by the calling method; clock means for clocking the current time; and, based on the clock content of the clock means, outside the operation timing of the first receiving means, and Switching means for switching and selecting the second receiving means at the transmission timing stored in the storage means to receive provided time information; and using the time information obtained by the switching means. Serial individual call receiver characterized by comprising a time correction means for correcting the clocking time of the time measuring means.