JPH0613955A - Radio communication equipment - Google Patents

Abstract

PURPOSE:To prevent useless transmission power consumption by allowing each radio station to control a transmission output level in response to a reception electric field detection level. CONSTITUTION:When a transmission reception section 11 of a radio equipment 200 detects a radio wave (a) from a radio equipment 100 and a reception electric field detection section 12 detects the electric field strength of the radio wave, a transmission output control section 13 sends a radio wave (b) with the absolute minimum transmission output in response to the detected level to the radio equipment 100. Upon the receipt of the radio wave (b), the reception electric field detection section 12 of the radio equipment 100 detects the electric field strength level and a transmission output control section 13 sets the transmission output of an absolute minimum and sends a radio wave (c) again to the radio equipment 200.

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 such as a portable wireless device which has a great limitation in battery life.

[0002]

2. Description of the Related Art Conventionally, in a communication system using a portable wireless device or the like, a system has been constructed so that at the time of transmission, communicators transmit to each other only with a preset transmission output.

[0003]

However, in the above-mentioned conventional communication system, even if the callers are located close to each other or far from each other, the transmission output is constant. Since a call was being made, as a result, there was a problem that excessive consumption of transmission power in communication (particularly in the former case) cannot be avoided.

The present invention solves such a conventional problem, and an object thereof is to provide an excellent wireless communication device capable of preventing wasteful transmission power consumption.

[0005]

In order to achieve the above object, the present invention comprises means for detecting the electric field strength of a received radio wave, and means for controlling a transmission output level according to the detected received electric field strength. It is equipped with.

[0006]

Therefore, according to the present invention, the radio devices communicating with each other switch the transmission output levels according to the electric field strength level at the time of reception to communicate with each other. It is possible to reduce waste and realize efficient use.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, reference numerals 100 and 200 denote radio devices that are in a one-to-one opposite talk with each other, and each includes a transmission / reception unit 11, a reception electric field detection unit 12 that detects electric field strength of a received radio wave, and a detected reception electric field intensity. And a transmission output control unit 13 that controls the transmission output level in accordance with the above. a is the first radio wave transmitted from the radio device 100 to the radio device 200, and b is the radio wave from the radio device 200 after the radio device 200 detects the level of the radio wave a and sets the transmission output to the required minimum level. This is a radio wave transmitted to the machine 100. Further, c is a radio wave which is transmitted to the radio device 200 again by the radio device 100 which has received the radio wave b, sets the transmission output to the necessary minimum according to the detection level of the radio wave b.

Next, the operation of the above embodiment will be described. In the above-described embodiment, when the wireless device 100 maximizes the set output and sends out the radio wave a from the transmission / reception unit 11, the wireless device 200 detects the reception level by the reception electric field detection unit 12 and transmits it to the wireless device 100. The output for control is switched to the minimum required level by the transmission output control unit 13 and the radio wave b is transmitted. On the other hand, the radio device 100 receives the radio wave b received from the radio device 200 when transmitting again to the radio device 200.
The electric field intensity is detected by the reception electric field detection unit 12, and the transmission output control unit 13 switches to the minimum required output level according to the intensity and sends the radio wave c. Hereinafter, between the wireless devices 100 and 200, the call is always performed while the transmission output level is controlled.

As described above, according to the above-described embodiment, since the radio devices 100 and 200 control the transmission output level according to the strength of their respective received electric field strengths, they are the minimum in communicating with each other. Therefore, it is possible to perform transmission only at the transmission output level required for the above, and as a result, it is possible to suppress wasteful consumption of transmission power and use it more efficiently.

[0010]

As is apparent from the above embodiment, the present invention comprises means for detecting the electric field strength of the received radio wave and means for controlling the transmission output level according to the detected received electric field strength. Therefore, each wireless device controls the transmission output level according to the received electric field detection level, so that even in communication using a communication device such as a portable wireless device, which has a great limitation in battery life, it is possible to Since transmission power can be sufficiently saved when a distance call is performed, the battery life of the wireless device can be extended.
In addition, it is possible to avoid wasteful transmission of radio waves to a wider area than the area required for a call, and it is possible to minimize interference with others.

[Brief description of drawings]

FIG. 1 is a block diagram showing a wireless communication device and a communication method thereof according to an embodiment of the present invention.

[Explanation of symbols]

 100 radio device 200 radio device 11 transmitter / receiver unit 12 reception electric field detection unit 13 transmission output control unit a radio wave with maximum set output b radio wave after output control c radio wave after output control

Claims (1)

[Claims] 1. A wireless communication apparatus comprising means for detecting the electric field strength of a received radio wave, and means for controlling a transmission output level according to the detected received electric field strength.