JP2806091B2 - Battery saving method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a battery saving method, and more particularly to a method for intermittently supplying power to a transceiver when a base station, a plurality of repeaters and a slave station constitute a wireless communication line. The present invention relates to a battery saving method that reduces power consumption during standby.

[0002]

2. Description of the Related Art Conventionally, in this kind of battery saving system, as shown in a general circuit diagram of FIG. 4, one base station 41 and a relay station 42 for relaying a signal of the base station 41 are provided. , 43 and a slave station 44 that communicates with the base station 41 via the relay station.
There is a battery saving system that saves power by intermittently supplying power by remote control from a user. Further, when the radio communication system adopts the time division system, since each channel uses the same frequency, the relay stations 42 and 4 are required to connect the lines correctly.
3. The slave station 44 needs to detect the synchronization signal from the base station 41. Accordingly, the battery saving signal transmitted from the base station 41 is also synchronized, so that all the relay stations and slave stations turn off the power of the radio in synchronization, and the synchronization signal for channel identification from the base station is output from the base station. Make sure that it is transmitted to the slave station. That is, as shown in the signal format of FIG. 5, a specific synchronization signal for battery saving (hereinafter, referred to as a BS-SYNC signal) is transmitted from the base station 41 after a synchronization signal of a time slot of a fixed period. . Upon detecting this BS-SYNC signal, the wireless devices of the relay stations 42 and 43 and the slave station 44 start a battery saving operation. That is, the battery saving is performed by transmitting the BS-SYNC signal transmitted from the base station 41 at a predetermined cycle while the radio equipment of the relay stations 42 and 43 and the slave station 44 is supplied with power and operates. The time interval of the intermittent operation of the power supply is determined so that the signal can always be received. In this way, the power supply of the wireless device is intermittently performed to reduce the power consumption.

On the other hand, when communication is performed between the base station 41 and the slave station device 44, the slave station device
4 transmits a call signal, and the base station 41
When the base station 41 receives the calling signal from the base station 41, the base station 41
The transmission of the YNC signal is stopped, and the base station 41 and the slave station 44 can enter a communication state. Also, in the case of an incoming call operation, an incoming signal is sent from the base station 41 to the slave station device 44 during the time when power is supplied, and when the incoming signal is received by the slave station 44, a response signal is sent to the base station. It is sent out to 41. When the base station 41 can receive the response signal, the base station 41
Stops transmission of the BS-SYNC signal, and the base station 41 and the slave station 44 can enter a communication state.

[0004] By the way, the relay station device and the slave station device perform a battery saving operation by the BS-SYNC signal from the base station. As shown in FIG. 6, it is set in advance in the relay station device and the slave station device, and this time is a constant value. A power-off time T off (hereinafter referred to as T1) and a power-on time T on (hereinafter T)
2), the larger the ratio T2 / T1 is, the more the power consumption by the battery saving operation can be reduced.

However, if the power-off time is long,
In some cases, the time required for the call connection between the slave station device 44 and the base station 41 becomes longer, and the possibility that a plurality of slave station devices perform a call operation at the same time increases, so that the call operation cannot be performed.
In the former case, it is the time from when the telephone connected to the slave station device 44 is off-hook to when it enters the communication state.
It can be a problem even for a long time. However, in the latter case, since the calling operation cannot be performed, this state must be avoided. Therefore, the time for turning off the power cannot be too long. Conversely, the longer the power-on time is, the lower the possibility that a plurality of child station devices will make a call at the same time is, and more call processing and incoming call processing can be performed.

The occurrence of calls by a plurality of telephones greatly varies depending on the time zone. Usually, there are many during the day and few during the night. In general, such battery saving is required for remote telephones which have to rely on batteries or solar cells for powering the relay station apparatus and the slave station apparatus.

Therefore, as shown in FIG. 6, the time interval for transmitting the BS-SYNC signal from the base station is changed so that the battery saving operation is performed at a predetermined cycle for each predetermined time zone. In a time zone with few calls at night, the power consumption by the battery saving operation is set to be lower than in the daytime, which is a time zone with many calls.

That is, T2 / T1 at night is set to be larger than T2 / T1 at the middle, and at night when the solar cell does not operate, the consumption of power stored in the battery is reduced. Conventionally, such time measurement for changing the time interval of T2 / T1 has been performed by clock measurement.

[0009]

In the conventional battery saving system described above, the actual time and the time measured in the base station slightly deviate due to the accuracy of the clock when operated for a long time. So you need to adjust the clock regularly. Also, the occurrence of calls is not limited to time zones,
Since the month, the season, the weather, the day of the week, and the area change, the ratio of T2 / T1 is determined by dividing the time into a certain time and a midnight time zone in which no call is expected to occur. Therefore, even in the daytime when there is no call, the relay station device and the slave station device cannot change the operation cycle of the battery saving, and more effectively reduce the power consumption stored in the battery. It has the disadvantage that it cannot be done.

[0010]

A battery saving system according to the present invention includes a base station, a plurality of slave stations, and a relay station device for relaying time-division communication information between the base station and the slave station. A battery saving method in a wireless communication line, wherein the base station determines a battery saving synchronization signal for synchronously turning off the power supply of the relay station device and all or some of the slave stations. Means, and the number of generated calls of the communication performed between the base station and the slave station or the relay station device is accumulated daily for one hour at a time, and the cumulative number of generated calls is at least 7 days or more. Measuring means for calculating the average number of calls per hour and outputting information on the average number of calls per hour, and measuring the transmission time interval of the battery saving synchronization signal transmitted from the base station. It is changed corresponding to the average number of calls per a certain time.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of a base station as a main part of one embodiment of the present invention, FIG. 2 is a block diagram of a relay station device of the present embodiment, and FIG. 3 is a time chart for explaining the present embodiment.

The base station of the embodiment shown in FIG.
Antenna duplexer 10, receiver 11, decoders 13A and 13B for decoding received signals, transmitter 12, encoders 14A and 14B for modulating transmission signals, and battery saving (B
S) A subscriber line interface circuit 16 serving as an interface between the wireless device having the signal generator 3A and the exchange 17
A, 16B, a switching interface unit having a line concentrator circuit 15, a control unit 6 for counting the number of calls output from this interface unit, a time generation circuit 7, and a call number processing unit 6A having a storage circuit 8. ing.

Next, the operation of this embodiment will be described. The concentrator circuit 15 is connected to the subscriber line interface circuits 16A and 16B, and the subscriber line interface circuits 16A and 16B are connected to the exchange 17 via a telephone line (2W). The signal from the concentrator 15 is sent to external relay stations via the encoders 14A and 14B, and further via the transmitter 12, the antenna duplexer 10, and the antenna 9. A signal from the external relay station is input to the concentrator 15 via the antenna 9, the antenna duplexer 10, the receiver 11, and the decoders 13A and 13B.

Next, the synchronization signal generation circuit 2 in the BS signal generation section 3A generates a synchronization signal based on a periodic signal (see time slot 0 in FIG. 5) sent from the periodic signal generation circuit 1. As shown in FIG. 5, the BS-SYNC signal generating circuit 3 generates a synchronizing signal BS-SYNC signal for battery saving in response to the generation of the synchronizing signal. The generation cycle of this BS-SYNC signal is controlled by the BS cycle generation circuit 10, and the setting change control of this cycle is performed by the time setting circuit 5. The BS cycle generating circuit 4 includes a frequency dividing circuit 4A for dividing the frequency of the periodic signal from the periodic signal generating circuit 1, and a timing circuit 4B for determining the transmission time of the BS-SYNC signal. The control unit 6 includes a concentrator circuit 15,
Subscriber interface circuits 16A, 16B, decoder 13
A, 13B and control signals from the encoders 14A, 14B. The control unit 6 further includes a time generation circuit 7 for counting 24 hours, a storage circuit 8 for storing the traffic of communication between the slave station device and the base station device.
Connected to

Next, the configuration and operation of the relay station apparatus shown in FIG. 2 will be described. The one-way communication is input to the reproduction circuit 29 via the antenna 22, the antenna duplexer 24, and the receiver 27, reproduced, and transmitted to, for example, a base station via the transmitter 25, the antenna duplexer 23, and the antenna 21. . The communication signal in the other direction is the antenna 21, the antenna duplexer 23, the receiver 28
Is input to the reproduction circuit 30 via the
6, transmitted to the next station via the antenna duplexer 24 and the antenna 22. Now, when the transmission signal from the base station is received by the receiver 28, a BS-SYNC signal detector 36 is connected to the reproduction circuit 30 for reproducing the reception signal of the receiver 28, The BS-SYNC signal is detected. On the other hand, the delay circuit 34 uses the BS-SYN
The RS flip-flop 33 is reset after a predetermined time from the detection timing of the C signal. The switch 32 is turned off in response to the reset of the flip-flop 33,
The power supply 31, which is a battery, is turned off. The timer 35 determines the set timing of the flip-flop 33.
The timer 35 detects the elapse of a preset time from the detection timing of the BS-SYNC signal, and sets the flip-flop 33 in response thereto. In response to this set, the switch 32 is turned on and the power supply 31 is turned on. Although the configuration of the slave station device is not particularly shown, the switch 32, the flip-flop 33, the delay circuit 34, the timer 35, and the BS-SYNC signal detector 36 in the relay station device of FIG. I have.

Next, the operation of the base station and the relay station device configured as described above as a battery saving system will be described. In the general circuit configuration shown in FIG. 4, in the initial state, the relay station devices 42 and 43 and the slave station device 44 always supply power to the transceiver and operate them.
Next, the base station sends out a BS-SYNC signal. Upon detecting the BS-SYNC signal, the relay station devices 42 and 43 and the slave station device 44 turn off T (T2) for a predetermined period of time.
Only do battery saving. The base station then BS-S
The transmission of the YNC signal occurs after a certain time T1. The relay station devices 42 and 43 and the slave station device 44 supply resources to the transceiver again after the elapse of the time T2, and then the BS-SY
The operation of detecting the NC signal and turning off the power again for a certain period of time is repeatedly performed.

Next, in this embodiment, as shown in FIG. 3, the transmission timing of the BS-SYNC signal transmitted from the base station is changed depending on the time zone. Therefore, the relay station device 4
2, 43, the time during which power is supplied to the transceiver of the slave station device 44 changes like TX1 and TX2. BS-
As a method of changing the SYNC signal transmission timing depending on the time zone, the number of calls per hour is used. That is, the call count data is stored every day. If these data are obtained for, for example, 30 days, the obtained call count data is averaged and stored in the storage circuit 8 every hour for 24 hours in a day. BS-S every hour based on this call count data
The transmission time interval of the YNC signal is changed.

In a time period when the number of calls generated is small, the BS-S
The transmission interval Tyn of the YNC signal is shortened. However, Tx3
(Or Tx4) << Tyn. As a result, in the relay station device and the slave station device, the time for turning on the power supply to the transceiver is shortened. In a time zone in which the number of calls generated is large, a transmission time interval Ty of the BS-SYNC signal transmitted from the base station.
Increase n. As a result, in the relay station device and the slave station device, the time during which the power supply to the transceiver is turned on becomes longer.

Next, the operation of the base station and the relay station device configured as described above will be described. In FIG. 1, a synchronization signal generation circuit 2 sends out a synchronization signal at a constant period according to a constant period signal from the period signal generation circuit 1, and further transmits a BS-SY signal.
An NC signal is generated by a BS-SYNC signal generation circuit 3,
The BS-SYNC signal is added to the synchronization signal. This BS
The transmission timing of the SYNC signal is determined by the BS cycle generation circuit 4.
Generated by That is, in FIG.
The timing of Ty2 is determined by the BS cycle generation circuit 4. The timing for transmitting the BS-SYNC signal according to the time zone is determined by the time setting circuit 5.
The BS cycle generating circuit 4 includes a frequency dividing circuit 4A for dividing the frequency of the periodic signal from the periodic signal generating circuit 1, and an output B of the frequency divided signal.
A timing circuit 4B for designating the transmission time of the S-SYNC signal is provided. The frequency dividing ratio to the frequency dividing circuit 4A is determined by the time setting circuit 5. The BS-SYNC signal transmitted from the BS-SYNC signal generation circuit 3 is transmitted to the relay station device via the transmitter 12, the antenna duplexer 10, and the antenna 9.

In order to communicate with the slave station, the BS-
After the transmission of the SYNC signal is stopped and the call connection and the incoming call are made for each time slot time-divided by the line concentrator 15, the digital signals are converted into analog signals by the decoders 13A and 13B and the encoders 14A and 14B. Then, the analog signal is converted into a digital signal, communication between the slave station device and the exchange 17 is performed, and a telephone call can be made with a telephone connected to the slave station device. The time generation circuit 7 connected to the control unit 104 can generate time every hour. The storage circuit 8 counts the number of calls generated every hour every day, and can store, for example, seven days (for one week). Based on this data, the average number of calls for each hour for seven days is obtained and stored in the storage circuit 103. The counting of the number of calls and the calculation of the average number of calls per time are repeated daily.

The counting of the number of calls is performed as follows. When an incoming call is received from the exchange 17, a ringing signal is transmitted from the exchange 17. Subscriber interface circuit 16A
Detects the ringing signal, it notifies the control unit 6 via the a-1 signal. The control unit 6 controls the switches, activates encoders and decoders that are not currently used, and calls the slave station device. As a result, the subscriber interface circuit 16A
Can communicate with the slave station device via the encoder and the decoder. That is, when the ringing signal is detected by the subscriber interface circuit 16A, the number of calls in this time zone is reduced by one.
Is counted. On the other hand, when a call is generated from the slave station device,
For example, when a call signal is received by the vacant decoder 13B, the control unit 104 can know that there is a call from the slave station device via the bn signal. The control unit 6 controls the switch and connects to the subscriber interface circuit 16B. That is, when a call signal is received from the slave station device, 1 is added to the number of calls in this time zone. For example, the above operation
The average of the number of calls for each hour for seven days is stored in the storage circuit 8. This average number of calls is constantly counted. Based on the stored call count information, the control unit 6 determines the value of the call count corresponding to the current time. Send out. This frequency division number is increased so that Tyn >> Tx2 in a time zone where the number of calls is large. As a result, in the relay station device and the slave station device, the time for turning on the power supply to the receiver can be longer than the time for turning off the power. Conversely, time setting circuit 5
Is set so that Tyn is close to T3 in a time period when the number of calls is small. As a result, in the relay station device and the slave station device, the time for turning on the transmission / reception power supply can be shorter than the time for turning off the power supply.

Next, the operation of the relay station device will be described with reference to FIG. The BS-SYNC signal from the base station passes through the antenna 21, the antenna duplexer 23, the receiver 28, and the reproduction circuit 30, and is detected by the BS-SYNC signal detection circuit 36. The signal from the BS-SYNC signal detection circuit 36 is delayed by a delay
Reset 3 In the reset state, the output of Q of the flip-flop 33 controls the switch 32 to be turned off, and the power supply 31 supplies the receivers 27 and 28 and the transmitters 25 and 2.
6. Power supply to 6 is cut off. Timer 35 is BS-SYNC
The operation is started by the output of the signal detection circuit 36, and a signal is sent out after a fixed time Tx3 (or Tx4) to set the flip-flop 33. As a result, flip-flop 3
When 3 is set, the switch 32 is turned on by the output from the Q terminal, and the power supply 31 is connected to the transmitters 25, 26,
Power is supplied to the receivers 27 and 28. In this way,
Since the relay station apparatus that has received the BS-SYNC signal transmitted from the base station performs battery saving for Tx3 and Tx4 hours, the relay station apparatus changes the time for transmitting the BS-SYNC signal transmitted from the base station to change the time. ,
The power supply time of the slave station device to the transceiver can be changed. The BS-SYNC signal is transmitted to the transceiver 2 at the times Tx1 and Tx2 when power is supplied to the transceiver.
6. The signal is transmitted to the lower-level relay station device or the slave station device via the antenna 22. The lower relay station device and the slave station device have a BS-SYNC signal detection circuit, a timer, a delay circuit, a flip-flop and a switch similarly to the above-described relay station device, and receive the detected BS-SYNC signal. The power supply of the built-in transceiver is turned on intermittently.
Off.

As described above, according to the present invention, the transmission time of the BS-SYNC signal can be set to an arbitrary value according to the number of calls that changes according to the time zone. Further, in the present embodiment, the time zone is described every hour, but the number of calls is counted every tens of minutes,
-SYNC signal transmission timing may be determined. Further, the transmission timing of the BS-SYNC signal is determined based on the number of calls, but the same effect can be obtained by counting the line holding time in each predetermined time zone. As an example of a method for detecting an outgoing call and an incoming call, the embodiment in which monitoring of 2W lines and operation of an encoder and a decoder provided for each time-division time slot are described. According to the method, by monitoring the control signal used in this common line, further in the communication between the base station and the slave station, the method of performing the call connection operation using a control time slot,
The same effect can be obtained by monitoring the call connection signal used in the control time slot.

[0024]

As described above, according to the present invention, a circuit for changing the transmission timing of a BS-SYNC signal from a base station in accordance with the traffic at regular intervals is provided. Therefore, in a time zone with a small number of calls, the time for turning on the power supply to the transceiver can be made shorter than in a time zone with a large number of calls. In a large time zone, the time during which power supply to the transceiver is turned on can be made longer than in a time zone in which calls do not frequently occur, so that there is an effect that call loss can be reduced.

[Brief description of the drawings]

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

FIG. 2 is a block diagram of a relay station device as a main part of the embodiment.

FIG. 3 is a timing chart for explaining the embodiment.

FIG. 4 is a line configuration diagram of a general communication line.

FIG. 5 shows a signal format common to the present embodiment and the conventional example.

FIG. 6 is a timing chart illustrating a conventional example.

[Explanation of symbols]

 Reference Signs List 1 periodic signal generation circuit 2 synchronization signal generation circuit 3 BS-SYNC signal generation circuit 4 BS synchronization generation circuit 5 time setting circuit 6 control unit 7 time generation circuit 8 storage circuit 9,21 antenna 10,23 antenna duplexer 11,27, 28 Receiver 12, 25, 26 Transmitter 13A, B Decoder 14A, B Encoder 15 Concentrator 16A, B Subscriber Line Interface 17 Switch 29, 30 Regeneration Circuit 31 Power Supply 32 Switch 33 Flip-Flop 34 Delay Circuit 35 Timer 36 BS-SYNC signal detection circuit

Claims (1)

(57) [Claims] 1. Battery saving in a wireless communication line having a base station, a plurality of slave stations, and a relay station device for relaying time-division communication information between the base station and the slave station.
A method, wherein the base station is the relay station apparatus and the terminal
Predetermined battery saving for synchronization signal for synchronization with off control of power supply to all or part of the slave station of the station
Means that are generated at the time intervals of 1 and the number of generated calls of the communication performed between the base station and the slave station or the relay station apparatus in units of one hour.
Cumulative calls that are accumulated daily for at least 7 days
Obtain the number and calculate the average number of calls / time to calculate the average number of calls per hour
Measuring means for outputting the information of the battery saving synchronization signal transmitted from the base station. The transmitting time interval corresponds to the average number of calls per time, which is the information of the measuring means.
Battery saving method which is characterized by varying Te.