JPH0685732A - Radio selective calling receiver - Google Patents

Abstract

PURPOSE:To extend the battery service life by optimizing an intermittent reception operating timing so as to reduce an average current consumption in the receiver implementing intermittent reception operation. CONSTITUTION:A reception operation rising time measurement section 105 measures an operation rising time of a radio section 102 at the start of reception. A reception operation control section 104 decides an optimum intermittent reception operation timing based on the operation rising time and sends an intermittent reception operation signal to a stabilizing power supply section 106 at the timing. As a result, the radio section 102 reduces the average current consumption for the intermittent operation in the optimum timing to extend the service life of the battery.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio selective calling receiver for performing intermittent receiving operation, and more particularly, to a radio selective calling receiver for changing the operation interval of the intermittent receiving operation according to the rising time of a local oscillation signal (hereinafter referred to as a radio selective calling receiver. , Simply referred to as the receiver).

[0002]

2. Description of the Related Art Next, an example of the intermittent operation of a conventional receiver will be described with reference to FIGS.

FIG. 4 is a block diagram showing the configuration of an embodiment of a conventional receiver.

A radio signal sent from a base station is supplied to a radio section 402 via an antenna 401 and demodulated. At this time, the radio unit 402 performs a radio signal reception operation using a local oscillation signal oscillated by the local oscillation unit. The demodulated signal is decoded by the decoding unit 403 and ID-RO
If the two numbers match with the selective call number stored in M406, a notification sound signal according to a predetermined pattern is sent to the amplifier 407. Amplifier 407
Then, the notification sound signal is amplified and sent to the speaker 408 to generate a notification sound. On the other hand, the reception operation control unit 40
4 is a stabilized power supply unit 4 based on the signal from the decoding unit 403.
A reception operation control signal is sent to 05. In the stabilized power supply unit 405, the radio unit 402 is operated according to the reception operation control signal.
A constant voltage is supplied to. As a result, the wireless unit 402
Performs an intermittent reception operation according to the reception operation control signal. The interval of the intermittent reception operation varies depending on the system used, but here, as an example, the international standard code CCI
RADI recommended in R REQ584-1
O PAGING CODE No. 1 (hereinafter, simply RP
The description will be made based on C1).

FIG. 5A shows the code format of RPC1. The receiver establishes bit synchronization by first receiving the preamble signal PA formed by the repeated data of I / O of 576 bits. Next, the receiver establishes frame synchronization by receiving the frame synchronization signal SC composed of 32 bits. The frame sync signal SC is followed by a selective call signal time-divided from frame F0 to frame F7.

FIG. 5B shows the frame F0 of FIG.
5 is an enlarged view of the frame F1 and FIG.
(C) represents a reception operation control signal transmitted from the reception operation control means 404 to the radio section 402 of the receiver belonging to the frame F1, and indicates (L) level that reception is impossible and (H) level that reception is possible. There is. Therefore, reception is possible from (a) to (c). Since the data of the frame F1 is transmitted only during the period (b) to (c), the receiving operation may be performed only during that time, but the receiving unit 402 immediately receives a constant voltage from the stabilized power supply unit 405. Since the receiving operation is not stable, the conventional receiver is provided with a receiving operation start-up margin (between (a) and (b)) to receive data normally. Further, the reception operation start-up margin is set to a constant value in advance.

[0007]

As described above, in the conventional receiver, the reception operation start-up margin is fixed to a fixed value in advance, so that the intermittent reception operation is inefficient.
That is, the reception operation start-up margin is equal to the radio unit 40 of FIG.
2 has a margin that takes into account variations in the oscillation start-up time of the local oscillator (not shown), which causes an extra reception operation time, resulting in battery life. The problem is that it is getting shorter.

In view of the above-mentioned drawbacks, the present invention is to provide a radio selective calling receiver which performs an intermittent receiving operation for extending the battery life.

[0009]

According to the present invention, there is provided a radio section for receiving a radio signal using a local oscillation signal oscillated by a local oscillation section, and the radio section intermittently performs the reception operation. In the radio selective call receiver, the reception operation rise time measuring means for measuring the oscillation rise time of the local oscillation signal generated at the start of the reception operation and outputting a time signal representing the oscillation rise time, and the time. A radio selective calling receiver having a reception operation control means for determining an intermittent reception operation interval for causing the radio section to intermittently perform a reception operation based on a signal.

Further, according to the present invention, the reception operation control means determines the intermittent reception operation interval on the basis of the time signal, and the reception operation control part determines the intermittent reception operation interval during the determined interval. A radio selective calling receiver having a power supply unit for supplying an operating voltage to the radio unit.

[0011]

Embodiments of the present invention will now be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of a receiver of the present invention. The radio signal sent from the base station is supplied to the radio unit 102 via the antenna 101 and demodulated. At this time, the radio unit 402 converts the radio signal into an intermediate frequency signal using the local oscillation signal oscillated by the local oscillation unit, and demodulates the intermediate frequency signal into a baseband signal, thereby performing the reception operation of the radio signal. To do. The demodulated signal is decoded in the decoding unit 103, and the ID-ROM
Compared with the selective call number stored in 107, if both match, a notification sound signal according to a predetermined pattern is sent to the amplifier 108. The amplifier 108 amplifies the notification sound signal and sends it to the speaker 109 to generate a notification sound. On the other hand, the reception operation control unit 10
Reference numeral 4 indicates the stabilized power supply unit 1 based on the signal from the decoding unit 103.
A reception operation control signal is sent to 06.

At this time, the reception operation rise time measuring section 105 monitors the waveform of the intermediate frequency signal generated by the radio section 102, measures the reception operation rise time from the waveform, and receives the measurement result. It is sent to the reception operation control unit 104 as a rising time signal. The reception operation control unit 104 resets the reception operation startup margin time according to the reception operation startup time signal, and sends the reception operation control signal to the stabilized power supply unit 106 according to the reception operation startup margin time at the next reception operation. To do. As a result, the wireless unit 102 becomes the stabilized power supply unit 106.
A voltage is supplied from the terminal to perform intermittent reception operation.

Next, the operation of the reception operation rise time measuring section 105 will be described in detail with reference to FIGS. 2 and 3. Radio section 1
The intermediate frequency signal A input from the
, The DC component is removed and a signal as shown in waveform B is obtained. Next, the signal is amplified by the amplifier circuit 202 (waveform C), the AC component is removed by the rectifier circuit 203 (waveform D), and input to the comparison circuit 205. On the other hand, the reference voltage generation circuit 204 has a predetermined reference voltage (waveform E), and the comparison circuit 205 compares the input waveform D with the waveform E voltage, and the waveform D voltage is lower than the waveform E voltage. When the voltage is low, the signal of L level is output, and when the voltage of the waveform D is higher than the voltage of the waveform E, the H level signal (waveform F) is output.

EXCLUSIVE-OR gate 206
(Hereinafter referred to as EX-OR 206) takes the exclusive OR of the output signal (waveform F) of the comparison circuit 205 and the reception operation control signal (waveform G) generated by the reception operation control unit 104 (waveform H). , The waveform is input to the AND gate 207.

In the AND gate 207, the clock signal (waveform I) is input from the decoding unit 103, the logical product of the clock signal (waveform I) and the reception operation control signal is obtained, and the result is output to the counting circuit 208 (waveform J). The counting circuit 208 counts the number of pulses of the input signal (waveform J) and outputs the result to the reception operation control unit 104 as a reception operation rising time signal. In the reception operation control unit 104, the reception operation rise time signal input from the reception operation rise time measurement unit 105 and the synchronization establishment signal input from the decoding unit 103 when the SC is received and the frame synchronization is established. , Determines the optimum reception operation control timing, and outputs the reception operation control signal to the stabilized power supply unit 106.

[0016]

As described above, according to the present invention, the receiving operation rise time measuring means for measuring the rising time of the oscillation signal generated in the local oscillating unit at the start of the receiving operation, and the operation interval of the intermittent receiving operation are determined. And a function of inputting the time signal obtained by the measuring means to the receiving operation means and determining an intermittent receiving operation interval based on the time signal. Since such a configuration can be realized, there is an effect that a wasteful start-up margin of a receiving operation as in a conventional receiver can be omitted and wasteful use of a battery can be significantly reduced.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a receiver of the present invention.

FIG. 2 is a block diagram showing a configuration of an embodiment of a reception operation rise time measuring section in the receiver of the present invention.

FIG. 3 is a diagram showing waveforms of respective parts in the reception operation rise time measuring part of FIG.

FIG. 4 is a block diagram showing a configuration of a conventional receiver.

[Figure 5] DADIO PAGING CODE No. 1
FIG. 6 is a diagram showing the data configuration of the above and the reception operation timing.

[Explanation of symbols]

 101 Antenna 102 Radio Unit 103 Decoding Unit 104 Reception Operation Control Unit 105 Reception Operation Rising Time Measurement Unit 106 Stabilized Power Supply Unit 107 ID-ROM 108 Amplifier 109 Speaker 201 Capacitor 202 Amplification Circuit 203 Rectifier Circuit 204 Reference Voltage Generation Circuit 205 Comparison Circuit 206 EX-OR gate 207 AND gate 208 Counting circuit 401 Antenna 402 Radio part 403 Decoding part 404 Reception operation control part 405 Stabilized power supply part 406 ID-ROM 407 Amplifier 408 Speaker

Claims (2)

[Claims] 1. A radio selective call receiver including a radio unit for performing a radio signal reception operation using a local oscillation signal oscillated by a local oscillation unit, and the radio unit intermittently performing the reception operation. Receiving operation rise time measuring means for measuring an oscillation rise time of the local oscillation signal generated at the start of the reception operation and outputting a time signal representing the oscillation rise time; and an intermittent operation for the radio unit based on the time signal. And a receiving operation control means for deciding an intermittent receiving operation interval for performing a receiving operation selectively. 2. The radio selective calling receiver according to claim 1, wherein the receiving operation control means determines a receiving operation control interval based on the time signal, and the determined receiving operation control section. And a power supply unit that supplies an operating voltage to the wireless unit during a reception operation interval.