JP3001528B1 - Data reception method of wireless selective call receiver - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the reception efficiency of a selective radio call receiver capable of reception by plural channels. SOLUTION: By reception control signals from an intermittent reception control part 108, the reception of receivable plural channels is performed and the reception error rate of the respective channels is decided in an error rate decision part 105 and obtained from an error rate analysis part 106. When the error rate is analyzed in the respective channels, channel priority is decided from the error rate in the error rate analysis part 106 and the channel of a low error rate to reception data is set as a priority channel. After executing the judgement processing of the priority channel, intermittent reception control is performed, and in the case of obtaining information that the data of the plural channels overlap in a frame to be reception ON in the next time from a control part, control is performed so as to perform the reception by the priority channel.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio selective call receiver capable of receiving data at a plurality of frequencies (hereinafter referred to as channels), and more particularly to a data receiving system.

[0002]

2. Description of the Related Art A radio selective calling receiver performs intermittent reception for controlling ON / OFF of a power supply of a radio unit which requires a large power consumption in order to extend the life of a battery. Wireless selective call receiver,
For example, as shown in FIG. 7, for a transmission data sectioned at a fixed transmission interval (hereinafter referred to as a frame) from a base station transmitting data, a fixed interval is set in each channel of the receiver itself. The receiving part is ON /
It is turned off and data is acquired at the time of reception ON.

[0003]

At this time, the reception ON timing is set so as not to be duplicated in each channel. However, as shown in FIG. It is also conceivable that it exists over the frame, and under such conditions, the reception ON timing may overlap.

In such a case, in the conventional radio selective calling receiver, the priority is set in advance to the owned channel (in FIG. 8, F1 is the priority channel). Since the data of the high channel F1 is taken into the receiving unit, the reception is performed on the channel F1 regardless of the quality of the data such as the amount of error, and the reception is performed on the channel F2 having a low priority and not acquiring the data. However, even when there is a possibility that the reception efficiency may be improved with few data errors, the data of the channel F2 cannot be obtained.

Accordingly, an object of the present invention is to improve the reception efficiency of a radio selective call receiver capable of receiving on a plurality of channels in view of the above problems.

[0006]

According to the present invention, in a radio selective calling receiver having the above characteristics, when the reception ON timings of a plurality of channels overlap each other, both channels are simultaneously turned on. At this time, since information on only one of the channels can be obtained, at this time, an error rate at the time of data reception is analyzed and stored for each channel as a means for determining which channel information is to be obtained. When reception ON timings overlap, the priority of the channel from which data is to be acquired is determined based on the analyzed error rate of each channel.

In another aspect of the present invention, an electric field strength at the time of data reception for each channel is determined, analyzed and stored, and when reception ON timings overlap, the analyzed electric field strength for each channel is used. It is characterized in that the priority of a channel from which data is to be acquired is determined based on the strength.

According to the present invention, when reception timings overlap between channels, the problem of the prior art that fixedly acquires data of the highest priority channel (hereinafter referred to as main channel), By detecting data of a channel having a poor reception condition, it is possible to prevent a situation in which a call is lost without receiving a clear message addressed to itself of the other data.

[0009]

FIG. 1 is a block diagram showing a first embodiment of a radio selective call receiver according to the present invention.

A radio selective calling receiver according to the present invention includes an antenna 101 for receiving a signal transmitted from a radio transmitting station.
And a receiving unit 10 that receives data transmitted from a wireless transmitting station via an antenna, demodulates the data, and outputs the data as received data.
2, a synchronization signal detection unit 103 that receives the reception data output from the reception unit as an input and detects a synchronization signal from each frame of the reception data, and a CPU 109 that decodes the reception data and
A decoding unit 104 that outputs decoded data, an error rate determining unit 105 that detects an error from the decoded output data and determines an error rate for transmission data, and stores a data error rate analyzed by the error rate determining unit. The error rate analysis unit 106 determines the channel priority from the error rate and stores it. The system information included in the received data determines whether the signal is a reception signal addressed to the own device, and transfers the determination result to the CPU. System information determining section 107 (to be referred to as a decoder including decoding section 104 and system information determining section 107), display section 111 for displaying a message received from the output result from decoding section 104, and output result of decoding section 104 A speaker driving unit 110 and a speaker 113 that generate a notification sound when a message addressed to the own device is detected.
And an intermittent reception control unit 108 for intermittently turning on / off the power supply of the reception unit at a preset reception cycle, a judgment result from the system information judgment unit 107 and the decoding unit 104
And a memory unit 112 for storing a self-addressed message and the like received by output data from the server.

Next, the operation of the radio selective calling receiver of the present invention will be described with reference to the flowchart shown in FIG. Although the number of owned receiving channels is arbitrary, here, as an example, the owned receiving channels are two of F1 and F2.
Assume that the preset initial value of the main channel is F1.

When the power of the receiver is turned on, first, the initial value of the main channel F1 is obtained from the error rate analysis unit 106, and the channel flag MAINF of F1 is set to 1. The receiving channel is set to F1 based on the set flag, and the reception is performed.

When a synchronization signal is detected in the signal of F1, and data is obtained, the error rate determination unit 105 makes a determination. When data is not obtained, the reception unit 102 is turned off to perform an intermittent reception operation. After acquiring data in F1 and analyzing the error rate, it is determined whether the error rate has been analyzed in the acquired data of both the F1 and F2 channels.

If the error rate can be analyzed in both channels, the error rate analysis unit 106 determines the channel priority from the error rate, and sets MAINF so that the side with the lower error rate for the received data becomes the main channel. . After executing the main channel determination process, intermittent reception control is performed, and when information that the data of the channels F1 and F2 overlap in the next frame to be received ON is obtained from the control unit, the set MAI is set.
The receiving unit 102 is turned on by determining the channel from which data is to be acquired in the next overlapping frame from the setting value of the NF. I do.

FIG. 3 shows an example of the ON timing of the receiving section of the radio selective calling receiver according to the present invention. Here, the main channel is F1 in the initial setting. Also, it is assumed that the intermittent reception control unit 108 is controlled to turn on the reception at the timings of frames 0, 4, 8,..., F2, 2, 6, 10,.

When the receiving unit is turned on from the power-on state, the data of F1 is received in frame 0, and the error rate of F1 is analyzed. At this point, the error rate of F2 has not been obtained, and the main channel is switched. Does not perform the error rate determination. In frame 2, when F2 data is received, the error rate of F2 is analyzed, and the error rates of both channels are compared. (When the receiving unit of frame 2 is OFF) At this time, the error rate is
If the F1 side is large, it is determined that the main channel is F2, and MAINF is set to 0.

When the data of F1 is received in frame 4 and information indicating that the received data of frame 8 which is the next reception timing of F1 is long data extending to frames 9 and 10 is obtained from the obtained data, the MAINF determination processing is performed. At this time, since the MAINF value is 0, it is determined that the data of F2 is valid, and the data of only F2 is obtained. At this time, channel F in frames 8, 9, and 10
1 is not turned on. That is, as shown in FIG.
As shown in the figure, on the receiver side,
Turn on the (frequency) receiver to obtain data
It is known beforehand that the sending station can send a long sentence
The previous frame of the channel that will be the data (the frame in FIG. 3
In the data transmitted in step 4), the next frame (in FIG.
In frame 8), long sentence data over frames 9 and 10
By sending data containing the information that
The device determines whether data collision occurs between channels.
You can do another. In the example of FIG. 3, the receiver side
F1 data of the next frame 8 from the data received in frame 4
Data is a continuous frame over frames 8-10.
Can be recognized, so that the frames F1 and F
2 can be predicted beforehand. So frame 8
In the case of -10, the receiving unit ON of the frequency (channel) F1 is performed.
Instead, only the receiving part of channel F2 in frame 10
Is turned on to acquire data of the channel F2.

FIG. 4 is a block diagram showing a second embodiment of the radio selective calling receiver according to the present invention. In the second embodiment, an error rate determination unit 40 that determines an error rate
5 and the data error rate analyzed by the error rate determination unit, and determine the channel priority from the error rate;
In addition to the error rate analysis unit 406 for storing, an error rate statistics unit 414 is incorporated.

The operation of the second embodiment is basically the same as that of the first embodiment, except that the priority of the channel is determined by the statistical value of the error rate. This is different from the first embodiment. That is, the error rate of each channel analyzed by the error rate analysis unit 406 is received by the error rate statistics unit 414 and turned on.
The priority is prioritized for each channel in the error rate analysis unit 406 based on the statistical result at the current time, and the main channel is determined.

The statistical value can be obtained by, for example, a method of obtaining an average value of the error rate for each channel and updating the stored content thereof for each reception.

In FIG. 4, the error rates of all the channels are statistically stored since the power is turned on, and the main channel is determined. The operation example in which the statistical operation is changed depending on the region will be described with reference to FIG. Will be explained.

When a user moves between areas having different channels and one or more of the receiving channels of the receiver cannot receive data, or an error occurs even though data is being received. When the rate has increased, the error rate statistics of the corresponding channel in the error rate statistics unit 414 are reset, and the statistical operation is stopped.

Also, the error rate at the time of data reception determined by the error rate determination unit 405 is reduced when the difference in error rate between channels of the receiver is reduced, that is, when reception channels coexist in the same area. In some areas, statistical operation of the error rate of only mixed channels is performed.

FIG. 6 is a block diagram showing a third embodiment of the radio selective calling receiver according to the present invention. The third embodiment employs a method of determining a priority channel based on an electric field strength at the time of data reception, instead of a method of determining a priority channel based on an error rate of a decoded signal.

That is, instead of the error rate determination unit and the error rate analysis unit in the first and second embodiments, an electric field intensity analysis unit 605 that determines and analyzes the electric field intensity of the received signal to determine the channel priority. have.

The electric field intensity analysis unit 605 includes a receiving unit 60
2, when receiving data of the own channel (for example, F1 and F2), obtains the respective received field strength data,
The obtained electric field intensity data for each channel is compared for each channel, and the comparison data is notified to the CPU 608. CPU6
08 sends a control signal to the intermittent reception control unit 607 based on the comparison data from the electric field intensity analysis unit 605 so as to preferentially acquire data of a channel determined to have high electric field intensity.

[0027]

According to the present invention, an error rate determining unit for analyzing an error rate of data and an error rate analysis unit for storing an error rate for each channel, comparing the error rates between channels, and determining a priority channel. By incorporating the unit, in the case of data duplication between channels, information with a low error rate of received data is preferentially obtained, so that in a radio selective call receiver having a plurality of reception channels, transmitted data is It is possible to receive efficiently.

An error rate judging section for analyzing an error rate of data and an error rate analyzing section for storing an error rate for each channel, comparing an error rate between channels, and determining a priority channel are built in. However, data is not obtained for data of a channel having a high error rate, and continuous error data such as noise is regarded as having a high error rate, and the receiving channel is automatically switched to a channel having a small error. Even if erroneous data or the like is received for some reason, such as noise, on the owned channel of, the reception and notification of the erroneous data can be reduced beforehand.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a radio selective calling receiver of the present invention.

FIG. 2 is an operation flowchart of the radio selective calling receiver of the present invention.

FIG. 3 is a diagram showing ON timing of a radio selective calling receiver of the present invention when data is duplicated.

FIG. 4 is a block diagram showing another configuration of the radio selective calling receiver of the present invention.

FIG. 5 is a diagram showing another operation example of the radio selective calling receiver of the present invention.

FIG. 6 is a block diagram showing another configuration of the radio selective calling receiver of the present invention.

FIG. 7 is a diagram showing a receiver ON timing of a conventional receiver having a plurality of channels.

FIG. 8 is a diagram showing ON timing of a conventional receiver having a plurality of channels when data is duplicated.

[Explanation of symbols]

 101, 401, 601 Antenna 102, 402, 602 Receiver 103, 403, 603 Synchronous signal detector 104, 404, 604 Decoder 105, 405 Error rate determiner 106, 406 Error rate analyzer 107, 407, 606 System information Judgment unit 108, 408, 607 Intermittent reception control unit 109, 409, 608 CPU 110, 410, 609 Speaker control unit 111, 411, 610 Display unit 112, 412, 611 Memory unit 113, 413, 612 Speaker 414 Error rate statistics unit 605 Electric field strength analysis unit

Claims (7)

(57) [Claims] 1. A receiving unit is turned on / off by a frame with a certain interval from transmission data divided by a certain frame from a base station side for transmitting data, and reception is turned on.
In the data receiving method of a radio selective call receiver capable of receiving data on a plurality of channels, acquiring data at the timing of: analyzing an error rate when data is received for each of the plurality of receivable channels. And remember,
If the reception ON timing overlaps between channels,
A data receiving method for a radio selective call receiver, comprising: determining a priority of a channel from which data is to be obtained based on an error rate of each analyzed channel, and receiving a channel having a higher priority. 2. A receiving unit is turned on / off by a frame at a fixed interval with respect to transmission data divided by a certain frame from a base station transmitting data, and a receiving ON is performed.
In the data receiving method of a radio selective call receiver capable of receiving data on a plurality of channels, acquiring data at the timing of: analyzing an error rate when data is received for each of the plurality of receivable channels. In addition, the reception error rate statistics are obtained and stored for each channel, and when reception ON timings overlap between channels, the priority of the channel from which data is to be acquired is determined based on the error rate statistical results at that time. A data receiving method for a radio selective calling receiver, characterized by determining a degree and receiving a channel with a high priority. 3. For a receiving channel that cannot be received or has a high receiving error rate among the receiving channels of the receiver, the statistics of the error rate of the corresponding channel are reset and the statistical operation of the corresponding channel is stopped. 3. The data receiving method of a radio selective calling receiver according to claim 2, wherein: 4. A receiving unit is turned on / off by a frame at a fixed interval with respect to transmission data divided by a certain frame from a base station transmitting data, and a receiving ON is performed.
In the data receiving method of a radio selective call receiver capable of receiving data on a plurality of channels, acquiring data at the timing of: analyzing an electric field strength when data is received for each of the plurality of receivable channels. If reception ON timings overlap between channels, the priority of the channel from which data is to be obtained is determined based on the electric field strength of each analyzed channel, and the channel with the higher priority is received. A data receiving method for a wireless selective call receiver, characterized by comprising: 5. A receiving section for receiving data transmitted from a wireless transmitting station, demodulating the data, and outputting the data as received data, and detecting a synchronous signal from each frame of the received data by inputting the received data. And a decoding unit that decodes the received data and outputs the decoded data to the CPU, and determines whether or not the received signal is addressed to the own device from system information included in the decoded received data, and A system information judging unit for transferring to the CPU, a display unit for displaying an output result from the decoding unit as a received message, and a notification for generating a notification sound when a message addressed to the own device is detected from the output result of the decoding unit. And an intermittent reception control unit for intermittently turning on / off the power supply of the reception unit in each reception cycle of a plurality of channels preset by a control signal from the CPU. And a memory unit for storing a determination result from the system information determination unit and a self-addressed message received based on output data from the decoding unit. An error rate detector for detecting an error from the output data, and determining an error rate for transmission data; storing a data error rate analyzed by the error rate determiner; and determining a channel to be received from the data error rate. A radio selective call receiver having an error rate analysis unit for determining a priority order and sending the result to the CPU. 6. An error rate for each channel analyzed by the error rate analysis unit is calculated and stored as a statistic value for each reception ON, and the statistic value is used to determine a priority of a reception channel. 6. The radio selective call receiver according to claim 5, further comprising an error rate statistic unit to be supplied to the rate analysis unit. 7. A receiving unit for receiving data transmitted from a wireless transmitting station, demodulating the data, and outputting the data as received data, and detecting a synchronization signal from each frame of the received data by inputting the received data. And a decoding unit that decodes the received data and outputs the decoded data to the CPU, and determines whether or not the received signal is addressed to the own device from system information included in the decoded received data, and A system information judging unit for transferring to the CPU, a display unit for displaying an output result from the decoding unit as a received message, and a notification for generating a notification sound when a message addressed to the own device is detected from the output result of the decoding unit. And an intermittent reception control unit for intermittently turning on / off the power supply of the reception unit in each reception cycle of a plurality of channels preset by a control signal from the CPU. A radio selective call receiver capable of receiving on a plurality of channels, comprising: a memory unit for storing a determination result from the system information determination unit and a self-addressed message received based on output data from the decoding unit; When receiving the data of the own channel in the section, obtain the respective received field strength data, compare the obtained field strength data for each channel for each channel, the comparison data as a channel priority determination signal CP
A radio selective call receiver comprising an electric field strength analysis unit for outputting to U.