JPH0653881A - Mobile communication system and receiving equipment to be used for the system - Google Patents

Abstract

PURPOSE:To reduce the power consumption of a mobile terminal by turning off a power supply to a disabled state only for a fixed time when the mobile terminal can not execute communication, and setting up the standstill time in accordance with a communication disabled time. CONSTITUTION:An intermittent receiving timing signal formed by an intermittent receiving power supply setting part 6 is outputted to an AND circuit 7 and the receiving level of a signal received by a receiving part 3 is judged by a level judging part 4. When the receiving level does not satisfies a prescribed value even when the intermittent receiving timing signal rises, a control part 5 outputs a standstill time setting signal to the AND circuit 7. The circuit 7 finds out AND between the intermittent receiving timing signal and the standstill time setting signal and sends the AND operation result to a power supply switching part 8. The switching part 8 receives the AND result from the circuit 7 and drives or stops the power supply. Thereby power consumption on a stand-by state can be reduced.

Description

Detailed Description of the Invention

[0001]

The present invention is used in mobile communications. In particular, it relates to a technology for reducing power consumption of mobile terminals such as mobile phones and radio call receivers.

[0002]

2. Description of the Related Art In mobile terminals, reduction of power consumption is an important technology for downsizing mobile terminals. As a method for reducing power consumption, there is a so-called discontinuous reception method. This divides mobile terminals into groups and limits the timing of signal transmission from the base station to each group mobile terminal to a specific timing, and the mobile terminal operates the power supply only during the timing of signal transmission to its own group. However, it is stopped at other timings. When the base station wants to call a mobile terminal, the base station sends out a call signal of the mobile terminal at the timing when the mobile terminal is operating the power supply. In the intermittent reception method, power consumption can be reduced depending on the ratio of the time when the power supply is in the operating state or the stopped state.

Next, a conventional intermittent reception system will be described with reference to FIGS. 3 and 4. FIG. 3 is an overall configuration diagram of the mobile communication system. FIG. 4 is a time chart showing the intermittent reception method. As shown in FIG. 3, from the base station 20 to the mobile terminal 3
Signals including call signals for 0, 31, and 32 are shown in FIG.
As shown in (a), each mobile terminal 30, 31,
32 are transmitted in a time-divided manner into time slots for each of the groups A, B, and C to which 32 belongs.

The group to which the mobile terminal belongs is group A.
Then, the power supply state in the intermittent reception system is shown in FIG.
As shown in. The power consumption can be reduced by the ratio of the time during which the power supply is in the operating state or the stopped state.

[0005]

According to this method, when the mobile terminal goes out of the area where communication is possible, or the antenna of the mobile terminal is stored even if the mobile terminal exists in the area, the mobile terminal itself is If the device is housed in a bag or the like and the reception level required for communication cannot be obtained, the call signal from the base station cannot be received even when the reception power supply is in the operating state. In such a case, even if the receiving power supply is in the operating state, its function cannot be fulfilled.
It is desirable to put the receiving power supply in a stopped state (sleep state). Such a reception method is called a sleep reception method.

[0006] The conventional intermittent reception system can reduce the power consumption to a certain extent according to the ratio of the operation or stop time, but cannot reduce the power consumption in the state where communication is impossible.

The present invention has been made against such a background. When the mobile terminal is in a state in which communication is not possible, the power supply is stopped for a certain period of time, and the power supply is stopped during communication. The setting is made according to the time of the impossible state to reduce the power consumption of the mobile terminal and prolong the usable time of the battery.

[0008]

The first aspect of the present invention is to:
Mobile communication provided with a receiving unit for receiving a radio signal from a base station and an intermittent reception power setting unit for opening and closing the power of the receiving unit in synchronization with a specific time slot from the signal received by the receiving unit It is a receiving device for.

Here, a feature of the present invention is that the means for detecting the reception level of the received signal, and the power source when the reception level detected by the detection means is below a predetermined value And a control unit for stopping over the time.

When the reception level detected by the detecting means after the elapse of the first time continues to be equal to or less than a predetermined value, n (n is a natural number) times consecutively occurs in the control unit. It is desirable to include means for shutting down the power supply for a second time period longer than the first time period.

Further, it is desirable to provide a manual operation means for invalidating the operation of the control section.

[0012] A second aspect of the present invention is a mobile communication system comprising a base station and the mobile communication receiving device.

[0013]

If the reception signal level does not satisfy the predetermined value even at the timing of receiving the time slot of the group to which the own mobile terminal belongs, the reception power supply is stopped for a certain period of time.
After the receiving power source is stopped for a certain period of time, the power source is put into the operating state and the intermittent signal is restarted if the call signal can be received.
If the call signal cannot be received yet, the power supply is stopped again. However, the number of times the reception state is confirmed can be reduced by making the second stop time longer than the first stop time. Power consumption can be reduced by lengthening the stop time, but the probability that the power supply will be in the stopped state in spite of the state that the call signal can be received increases, so set the maximum value for the stop time. .

It is also possible to provide means for invalidating the operation of the control unit so as to set the power supply so as not to be stopped even when the call signal cannot be received. As a result, the power consumption cannot be reduced, but it is possible to avoid a situation in which the calling signal cannot be received because the power supply is stopped for important communication.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of an embodiment of the present invention will be described with reference to FIG. FIG. 1 is a block diagram showing the configuration of the apparatus of the present invention.

According to the present invention, the receiving section 3 for receiving a radio signal from the base station 20, and the intermittent reception for opening and closing the power source of the receiving section 3 in synchronization with a specific time slot from the signal received by the receiving section 3 It is a receiving device for mobile communication, which is provided with a power supply setting unit 6 for mobile communication.

Here, the feature of the present invention is that the level determining section 4 which is means for detecting the reception level of the received signal, and the reception level detected by the level determining section 4 are below a predetermined value. And a control unit 5 for stopping the power supply for a first time at a certain time.

The control unit 5 is longer than the first time when the reception level detected by the level determination unit 4 continues to be below a predetermined value once after the first time has elapsed. A means for shutting down the power supply for a second time period.

Further, there is provided a switch 10 which is a manual operation means for invalidating the operation of the control section 5.

Next, the operation of the apparatus of the present invention will be described with reference to FIG. FIG. 2 is a time chart showing the operation of the apparatus of the present invention. As shown in FIG. 2A, the mobile terminals 30, 31, 32 are divided into groups A, B, C, respectively. Here, a case where the mobile terminal 30 receives a signal will be described.

As shown in FIG. 2B, the device of the present invention, which is the receiving device of the mobile terminal 30, receives the time slot of the group A to which the mobile terminal 30 belongs in synchronization with the timing. .

At this time, the intermittent reception timing signal generated by the intermittent reception power supply setting unit 6 is as shown in FIG. 2C, and this is output to the AND circuit 7.

The level of the signal received by the receiving unit 3 is judged by the level judging unit 4. If the reception level does not satisfy the predetermined value even though the intermittent reception timing signal has risen, the control unit 5 causes the control unit 5 in FIG.
The stop time setting signal is output to the AND circuit 7 as shown in FIG.

The AND circuit 7 calculates the logical product of the intermittent reception timing signal and the stop time setting signal, and sends the logical product result to the power supply switching section 8. The power supply switching unit 8 receives the logical product result from the AND circuit 7, and operates or stops the power supply as shown in FIG.

In this case, since the reception level was higher than the predetermined value when the reception was restarted again after a fixed time, the intermittent reception was restarted thereafter. 2 within this fixed time
The power corresponding to the slots can be reduced. That is, the power consumption during standby is reduced.

If the reception level does not satisfy the predetermined value when the reception is resumed, the control section 5 again generates the stop time setting signal, but at this time, the time is longer than the previous stop time (for example, 10 seconds). Stop the output for the number of slots). The intermittent reception power supply setting unit 6 continues to operate in the synchronized state even while the control unit 5 instructs the sleep state.

Further, by operating the switch 10, the stop time setting signal can be forcibly raised at all times.
This is used when priority is given to receiving a contact even if the power saving is neglected when waiting to receive an important contact.

[0028]

As described above, according to the present invention, when the mobile terminal is in the incommunicable state, the power supply is stopped for a certain period of time, and the power supply is in the inactive state for the communication is impossible. The power consumption of the mobile terminal can be reduced and the usable time of the battery can be lengthened by setting it according to the state time.

If the usable time of the battery is the same as the conventional one, the battery can be downsized and the mobile terminal can be downsized.

[Brief description of drawings]

FIG. 1 is a block diagram of an apparatus according to an embodiment of the present invention.

FIG. 2 is a time chart showing the operation of the device of the present invention.

FIG. 3 is an overall configuration diagram of a mobile communication system.

FIG. 4 is a time chart illustrating an intermittent reception system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 antenna 2 input terminal 3 receiving section 4 level determination section 5 control section 6 intermittent reception power setting section 7 AND circuit 8 power switching section 9 output terminal 10 switch 20 base station 30, 31, 32 mobile terminal A, B, C group

Claims (4)

[Claims] 1. A receiver for receiving a radio signal from a base station, and an intermittent reception power setting unit for opening and closing the power of the receiver in synchronization with a specific time slot from the signal received by the receiver. In a receiving device for mobile communication comprising: means for detecting the reception level of the received signal, and the power supply for a first time when the reception level detected by the detecting means is below a predetermined value. A receiver for mobile communication, comprising: a control unit for stopping. 2. The control unit continuously generates a reception level detected by the detecting unit after the elapse of the first time, which is equal to or less than a predetermined value, n times (n is a natural number) in succession. The receiving device for mobile communication according to claim 1, further comprising means for stopping the power supply for a second time longer than the first time. 3. The receiving device for mobile communication according to claim 1, further comprising a manual operation unit that invalidates the operation of the control unit. 4. A mobile communication system comprising a base station and the receiving device according to claim 1.