JPH11252626A - Low power consumption radio base station - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the radio base station that is efficiently operated with power consumption reduced. SOLUTION: The base station is provided with pluralities of radio sets 12-15, a power supply circuit 16 that supplies power to the radio set group, and switches 8-11 placed between each radio set of the radio set group and the power consumption circuit 16. When the traffic is lower than a set level consecutively for a prescribed period, power supply to prescribed radio sets of the radio set group is interrupted, and when the traffic is higher than the set level consecutively for a prescribed period, power supply to prescribed radio sets of the radio set group is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a low power consumption radio base station.

[0002]

2. Description of the Related Art Conventionally, a radio base station generally has a plurality of radios. The number of radios per radio base station is determined by the number of traffics set by predicting the number of mobiles to be processed by the radio base station and the frequency of use. The mobile device must also be available during high traffic hours, and the number of radios is considerably large. On the other hand, recently, a wireless base station is installed in a closed space such as a subway, and there is a case where there is almost no traffic at midnight. Apart from these extreme cases, the difference between day and night traffic is increasing. On the other hand, there are certain days and places where traffic increases, such as New Year's Eve, even at the same midnight.

FIG. 6 shows a schematic configuration of a wireless communication system. In this figure, a radio base station 2 is a base station controller 1
The wireless communication with the mobile station 17 is started by the control signal from. In the communication between the radio base station 2 and the mobile station 17, in the example shown in FIG. 7, one carrier is time-divided into six channels, and communication of six mobile units per carrier is possible.

[0004]

However, according to the above-mentioned method, a radio device installed in a time zone where traffic is heavy operates even when there is little use of a mobile device and there is almost no traffic. However, there is a problem that unnecessary current consumption occurs, which has been a problem. The present invention solves the above problems and provides a low power consumption radio base station capable of operating with low power consumption.

[0005]

According to the first aspect of the present invention, there are provided a plurality of wireless devices, a power supply circuit for supplying power to the wireless device group, each wireless device in the wireless device group, and the power supply circuit. And a control unit that generates a signal to turn on or off the power supply of a predetermined wireless device of the wireless device group to the switch in accordance with the frequency of use of traffic. A low power consumption radio base station characterized by comprising:

According to a second aspect of the present invention, when the frequency of use of the traffic is continuously lower than a set value for a predetermined period of time, the control unit supplies power to a predetermined wireless device of the wireless device group. Generating a signal to turn off the power supply of a predetermined wireless device of the wireless device group when the frequency of use of the traffic is higher than a set value continuously for a predetermined time; A low power consumption wireless base station according to claim 1 is provided.

According to a third aspect of the present invention, the control unit includes:
2. The low power consumption radio base station according to claim 1, wherein a signal for turning on a power supply of a predetermined number of the radios is generated based on traffic table data of the same time zone of the previous day. .

According to a fourth aspect of the present invention, the traffic table data is data obtained by calculating a required number of wireless devices by a value obtained by multiplying a maximum traffic number within a predetermined time by a safety factor. 4. The low power consumption wireless base station according to 3.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a low power consumption wireless base station according to an embodiment of the present invention. In this figure, reference numeral 2 denotes a radio base station, which includes a control unit 3, switches 8 to 11, and radios 12 to 15.
And a power supply circuit 16. The control unit 3 includes a communication unit 4, a main processing unit (hereinafter, CPU) 5, a timer 6
And a parallel input / output control unit (hereinafter, PIO) 7.

[0010] The control unit 3 receives a control signal from the base station control device 1 in the communication unit 4 and, based on the control signal, a CPU.
5 controls the wireless devices 12 to 15. This radio 12 ~
15 processes one carrier each. As shown in FIG. 7, the carriers are time-divided into six channels per carrier, and one mobile device can communicate with six mobile devices. That is, in FIG. 2, "the number of wireless devices × the number of channels 6 = 24", 24 channels can be used in this base station, and transmission ON / OFF control is performed for each channel.

The CPU 5 calculates the frequency of use of the radios 12 to 15 within a predetermined time based on the transmission ON state of each channel of the radios 12 to 15 and the timer value (interrupt) obtained from the timer 6. By controlling the signal, a power-off signal for the wireless devices 12 to 15 is generated. The switches 8 to 11 are connected to the power supply circuit 16 and the radios 12 to 1
The power supply to the wireless devices 12 to 15 can be interrupted or restarted by the power-off signal output from the PIO 7.

Next, the operation of the present embodiment will be described in detail with reference to FIGS. The wireless base station 2 is controlled by a control signal from the base station control device 1, and performs communication with the mobile device using the wireless devices 12 to 15. At this time, the transmission control of the wireless devices 12 to 15 is performed for each channel. The CPU 5 having received the transmission ON signal according to the control signal from the base station control device 1
5, the transmission ON control of each channel is performed.

FIG. 2 is a flow chart for explaining a one-minute interval interrupt process generated from the timer 6 to the CPU 5. Hereinafter, the radio 12
A description will be given of the power supply control to the power supplies 15 to 15. First, CP
When the interruption by the timer 6 is detected, U5 increments the data of the monitoring counter (Step A1 in FIG. 2). At this time, the CPU 5 holds the control state of the transmission of each of the channels “CH0 to 5” of the radios 12 to 15, and sums up the number of transmission ON channels of each radio to determine how many channels the radio base station 2 has. It is possible to know whether transmission is ON.

When the number obtained by dividing the number of transmission ON channels of the radio base station 2 by the number of radios supplied with power by 6 (the number of channels per radio) is greater than 0.5 ( Step A2), a transmission ON flag is set (step A3). Next, the data of the monitoring counter is checked, and if this data is larger than 10 (step A4), it is checked whether the transmission ON flag is set (step A5). When the transmission flag is not set, if more than two wireless devices are supplied with power (step A6), the power supply to the wireless device 15 or 14 is interrupted (step A7).

For example, if the number of transmission ON channels is 12 and the number of radios supplied with power is 4 in step A2, 12 ÷ (4 × 6) = 0.5, and the transmission ON flag is not set (step A2). A2). This state is repeated for the data values 1 to 11 of the monitoring counter, and the transmission is turned on.
When the flag is confirmed, since the transmission ON flag is not set (step A5), the number of wireless devices supplied with power is checked. The number of wireless devices supplied with power is the wireless devices 12 to 15, and power is supplied to all the wireless devices. Since the number of wireless devices is four (step A 6), the wireless device 1
Then, the power supply of the base station is interrupted to reduce the power consumption of the base station as a whole (step A7).

The power supply is interrupted by controlling the PIO 7 from the CPU 5 and turning off the switches 8 to 11 of the power supplied to the radios 12 to 15, respectively. The wireless devices to be interrupted for power supply are the wireless devices 14 and 15, and the power supply is interrupted in the order of the wireless devices 15 and 14. If the power supply to all the wireless devices is interrupted, it is not possible to cope with a new transmission ON control, so that the power supply to the wireless devices 13 and 14 is not interrupted.

When the transmission ON flag is set,
If there is a wireless device whose power supply has been interrupted (step A
8), the power supply to the wireless device 14 or 15 is restarted (step A9). After the power supply interruption or restart processing is completed, the monitoring counter and the transmission ON flag are cleared (step A1).
0), and the process ends.

Next, another embodiment of the present invention will be described in detail with reference to FIGS. 3, 4 and 5. FIG. Referring to FIG. 3, a different point from the configuration of FIG. 1 is that a clock 18 is connected to the CPU 5. With this configuration,
The processing of the flowchart shown in FIG. 4 is executed by interruption from the timer 6 to the CPU 5 at one-minute intervals.

When an interrupt occurs from the timer 6, the CP
U5 increments the monitoring counter (step B1 in FIG. 4). The current transmission O from the value of the transmission ON register
If the number of N channels is large (step B2), transmission is ON
The current number of transmission ON channels is overwritten in the register (step B3). If the data of the monitoring counter is greater than 10 (step B4), the time is read from the clock 18 (step B5), and from the read time, the data on the number of wireless devices used in the traffic table of FIG. 5 is read (step B6).

Based on the data on the number of wireless devices read from the traffic table, the power supply of the wireless devices is controlled (step B7). In the traffic table of FIG. 5, 24 hours a day is divided into 10 minutes per section, and the number of wireless devices used at each time is written. The value obtained by multiplying the value of the transmission ON register by 1.5 is divided by 6 and written into the immediately preceding (ten minutes before) traffic table (step B).
8). Therefore, the traffic cable data in the current transmission ON state is reflected after 24 hours. This embodiment is
Predict traffic in advance from the actual data of the previous day,
Since the power supply of the wireless device is controlled, there is a new effect that the power supply of the wireless device can be controlled without delay.

The operation of one embodiment of the present invention has been described above in detail with reference to the drawings. However, the present invention is not limited to this embodiment, and a design change or the like may be made without departing from the gist of the present invention. The present invention is also included in the present invention. For example, the number of wireless devices, the number of channels per wireless device, the safety factor, and other numerical values are not limited to the numerical values described in this embodiment.

[0022]

As described above, the first effect of the present invention is that a power supply switch is provided in each radio, and the power supply to an unused radio is interrupted in response to traffic fluctuation. Since it is made possible, the power consumption can be reduced and the base station can be operated efficiently. A second effect of the present invention is that power is supplied only to the required number of wireless devices based on the actual data in the traffic table on the previous day, so that power supply control of wireless devices without delay is performed. And power consumption can be reduced.
That is, efficient operation of the base station can be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a low power consumption wireless base station according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating power supply control for a wireless device according to an embodiment of the present invention.

FIG. 3 is a block diagram illustrating a configuration of a low power consumption radio base station according to another embodiment of the present invention.

FIG. 4 is a flowchart illustrating power supply control for a wireless device according to another embodiment of the present invention.

FIG. 5 is an example of a traffic table in the flowchart of FIG. 4;

FIG. 6 is a block diagram illustrating a schematic configuration of a wireless communication system.

FIG. 7 is a diagram for explaining channel time division in a carrier.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 base station control device 2 radio base station 3 control unit 4 communication unit 5 CPU 6 timer 7 PIO 8, 9, 10, 11 switch 12, 13, 14, 15 radio 16 power supply circuit 18 clock

Claims (4)

[Claims] 1. A plurality of wireless devices, a power supply circuit for supplying power to the wireless device group, a switch provided between each wireless device in the wireless device group and the power circuit, and a frequency of use of traffic And a control unit for generating a signal for turning on or off the power supply of a predetermined wireless device in the wireless device group to the switch according to Bureau. 2. The control unit according to claim 1, wherein when the frequency of use of the traffic is continuously lower than a set value for a predetermined time, a signal for turning off a power supply of a predetermined wireless device in the wireless device group is generated. 2. The signal according to claim 1, wherein when the traffic usage frequency is higher than a set value for a predetermined time continuously, a signal for turning on a power supply of a predetermined wireless device in the wireless device group is generated. Low power consumption wireless base station. 3. The control unit according to claim 1, wherein the control unit generates a signal for turning on a power supply of a predetermined number of the wireless devices based on traffic table data of the same time zone of the previous day. Low power consumption wireless base station. 4. The low power consumption according to claim 3, wherein the traffic table data is data obtained by calculating a required number of wireless devices by a value obtained by multiplying a maximum traffic number within a predetermined time by a safety factor. Wireless base station.