JPH08204595A - Radio communication equipment - Google Patents

Abstract

PURPOSE: To reduce the consumption of a battery as the supply power source for a radio communication equipment by temporarily turning off the power source of the equipment body at the time of continuation of the state that the equipment is in the outside of the service area. CONSTITUTION: When it is discriminated by a reception signal 11 from a reception part 1 that the equipment is on the outside at the service area, a control part 2 sets a repeat count N1 and an operation time T1 of channel scan to scan the channels; and if the time T1 elapses without reception of the radio wave from a base station, the control part 2 sets a reception part power source off duration time T2 to turn off the reception part power source. After the time T2 elapses in this state, the control part 2 turns on the reception part power source and subtracts one from the value of the repeat count N1. When the repeat count reaches 0 by repeating this operation, the control part 2 sets an equipment body power source off duration time T3 and instructs an equipment power source control part 4 to turn off the equipment body power source by a control signal 12. When the equipment power source control part 4 sends a control signal 14 to an equipment power supply part 7, power supply to the equipment main body is immediately cut off; and when the time T3 elapses thereafter, power supply to the equipment main body is restarted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wireless communication device, and more particularly to a wireless communication device in which consumption of a main power supply for supplying power to the device main body by power control is reduced.

[0002]

2. Description of the Related Art A radio communication device receives a radio wave emitted from a base station, acquires a control channel transmitted on the radio wave, and enters a standby state in which a call from the base station can always be received. enter.

This standby state must be a state in which the radio communication device can sufficiently and sufficiently receive the radio waves from the base station.

On the other hand, mobile radio communication devices do not always receive radio waves from base stations in a stable manner. For example, when moving to an area beyond the reach of radio waves from the base station, or when moving to a location where the radio waves are blocked, such as underground, the radio waves from the base station cannot be received and the mobile station leaves the standby state. To do. This is called "out of service".

As described above, when the wireless communication device leaves the standby state, the wireless communication device performs a so-called channel scan for switching the reception frequency to acquire another control channel.

Therefore, the wireless communication device outside the range of the base station repeats the channel scan until it moves into the range where radio waves can be received.

Conventionally, since the wireless communication device is out of service, when the channel scan is repeated for a certain period of time, the channel scan is stopped and the power supply of only the receiving section is turned off for a certain period of time.

When the power-off state continues for a predetermined time, the power supply to the receiving unit is turned on again to restart the channel scan. After that, when the wireless communication device is still out of range, the receiving unit power supply is turned off. The on / off control was repeated.

[0009]

In this conventional wireless communication device, the power supply to only the receiving section is cut off as much as possible while it is out of the service area, but the power supply to the entire device is always in the ON state. It was.

Therefore, even if the wireless communication device is out of the service area, each circuit other than the receiving unit in the device consumes current, and if the out-of-service condition persists, the consumption of the battery of the power supply is accelerated. There is a problem that the usable time of the wireless communication device is shortened.

An object of the present invention is to provide a main power supply which is a power supply to the apparatus main body by temporarily turning off the power of the apparatus main body without user's operation when the wireless communication apparatus continues to be out of range. Another object of the present invention is to provide a wireless communication device that reduces battery consumption.

[0012]

According to the present invention, a detecting means for detecting that it is impossible to receive a radio wave from a base station, and the detecting means detects the inability to receive the radio wave. A wireless communication device characterized by comprising a measurement means for starting measurement at times and a device power supply control means for cutting off the power supply to the device body when the value measured by the measurement means exceeds a preset value. can get.

Further, there can be obtained a wireless communication device characterized in that the device power supply control means is supplied with required power from a backup power supply different from the power supply to the device body.

Further, the counting means issues a command to the apparatus power supply control means to cut off the power supply to the apparatus main body when the number of times of repeating disconnection / connection of the power supply to the receiving section exceeds a preset number. Alternatively, the device power supply control means may be instructed to cut off the power supply to the device main body when the measurement time from the first power off to the receiving unit exceeds a preset time. It may be a timekeeping means.

Furthermore, the apparatus power source control means is provided with a second time measuring means for starting measurement when the power supply to the apparatus main body is cut off, and the time measured by the second time measuring means is set to a preset time. A wireless communication device is obtained in which the device power supply control means restarts power supply to the device main body when the power is exceeded.

[0016]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a power supply control section in an embodiment of a wireless communication apparatus of the present invention.

Referring to FIG. 1, in this embodiment, a receiving unit 1 for receiving radio waves from a base station through an antenna, and a receiving unit 1.
A control unit 2 which receives a reception signal 11 from the control unit 2 to control power supply to each circuit, a reception unit power supply unit 3 which supplies power to the reception unit 1 according to a control signal 13 from the control unit 2, and an apparatus. Power is supplied from a backup power supply 6 that is separate from the main power supply (main battery) 8 that supplies power to the main body, and a power supply to the device main body is turned on or off by operating the control signal 12 from the control unit 2 or the power switch 5. And a device power supply controller 7 for supplying power from the main power supply 8 to the device body according to a control signal 14 from the device power supply controller 4.
It has and.

Even if the apparatus main body is in the power-off state, if the backup power supply 6 has a voltage enough to drive the apparatus power-supply control section 4, only the apparatus power-supply control section 4 is turned on. ing.

Next, the operation of this embodiment will be described with reference to FIGS.

FIG. 2 is a timing chart showing the ON / OFF state of the power supply of the receiver and the ON / OFF state of the power supply of the apparatus main body in FIG. 1, and FIG. 3 is a flowchart showing the operation procedure of this embodiment.

The control unit 2 determines from the received signal 11 from the receiving unit 1 whether or not the own wireless communication device is out of range (step S1).

If it is out of range (YES in S1), the number of times N1 for repeating the channel scan operation (S4) and the receiver power-off operation (S8) is set (S2), and the timer for the channel scan operation time T1 is set. Perform (S3).

Then, a channel scan operation is performed (S
4) If the control channel can be acquired by receiving the radio wave from the base station (YES in S5), the channel scan operation time T1 is reset (S17) and the standby state is set (S18).

Further, since the radio wave from the base station cannot be received, the control channel cannot be acquired (S5
NO) when the channel scan operation time T1 has elapsed (YES in S6). After setting the timer of the receiver power off duration T2 (S7), the receiver power off operation is performed (S8).

When the receiver power-off duration T2 elapses in this state (YES in S9), the receiver 1 is powered on (S10), and the value of the number N1 is decreased by -1 (S).
11).

When this operation is repeated N1 times and N1 = 0 (YES in S12), the apparatus main body power-off continuation time T
3 is set as the timer (S13), and the control unit 2 sets the control signal 12
Instruct the device power supply controller 4 to turn off the power supply of the device main body and to inform the set power off duration T3 of the device main body.

Upon receiving this instruction, the device power supply control unit 4 sends a control signal 14 to the device power supply unit 7, and the device power supply unit 7 immediately turns off the power supply to the device body (S14).
When the apparatus main body power-off continuation time T3 elapses in this state, the power supply to the apparatus main body is turned on again (S1).
6).

Further, this apparatus main body power-off continuation time T3
If the user operates the power switch 5 before the
The power supply to the device body can be forcibly turned on.

In the above description, the counting means S3 is used.
The power supply to the apparatus main body is turned off by repeating the procedure from S1 to S11 N1 times, but the power supply to the apparatus main body is turned off after the elapse of a predetermined time by using the time measuring means as the measuring means. May be.

[0031]

As described above, according to the present invention, the detection means for detecting the inability to receive the radio wave from the base station and the measurement when the detection means detects the radio wave inability to be received. A state in which the wireless communication device is out of range by including a measuring means for starting the operation and a device power control means for cutting off the power supply to the device body when the value measured by the measuring means exceeds a preset value. Since the power of the main body of the apparatus is temporarily turned off without any operation by the user when continues, there is an effect that it is possible to reduce consumption of the main power supply battery that is the power supply to the main body of the apparatus.

Further, the apparatus power supply control means is provided with a second timing means for starting measurement when the power supply to the apparatus main body is cut off, and when the time measured by the second timing means exceeds a preset time. The device power supply control means restarts the power supply to the device main body, so that the power supply to the device main body is turned on again when the time in which the reception state of the radio wave is changed and the signal can be received has passed. This has the effect that the wireless communication device can be put into the standby state after the time.

[Brief description of drawings]

FIG. 1 is a block diagram showing a power supply control section in an embodiment of a wireless communication apparatus of the present invention.

FIG. 2 is a timing chart showing an on / off state of the power supply of the receiving section and an on / off state of the power supply of the apparatus main body in FIG.

FIG. 3 is a flowchart showing an operation procedure of this embodiment.

[Explanation of symbols]

 1 receiver 2 control unit 3 receiver power supply unit 4 device power supply control unit 5 power switch 6 backup power supply 7 device power supply unit 8 main power supply 11 received signal 12, 13, 14 control signal N1 number of times T1 channel scan operation time T2 reception Part power off duration T3 Device power off duration

Claims (5)

[Claims] 1. A detection means for detecting that it is impossible to receive a radio wave from a base station, a measurement means for starting measurement when the detection means detects that the radio wave cannot be received, A wireless communication device, comprising: a device power supply control device that cuts off power supply to the device body when a value measured by the measurement device exceeds a preset value. 2. The wireless communication device according to claim 1, wherein the device power supply control means is supplied with required power from a backup power supply different from a power supply to the device body. 3. The counting means for instructing the device power supply control device to cut off the power supply to the device body when the number of times of repeating disconnection and connection of the power supply to the receiving unit exceeds a preset number. The wireless communication device according to claim 1, wherein the wireless communication device is means. 4. The timekeeping for instructing the device power supply control device to cut off the power supply to the device main body when the measuring time exceeds a preset time from the first power-off to the receiving unit. The wireless communication device according to claim 1, wherein the wireless communication device is means. 5. The apparatus power source control means comprises a second timing means for starting measurement when the power supply to the apparatus main body is cut off, and the time measured by the second timing means exceeds a preset time. The wireless communication device according to any one of claims 1 to 4, wherein the device power supply control means restarts power supply to the device body at the point of time.