JP2000341210A - Radio communication unit, its method and medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stably control transmission power even when a control signal to control the transmission power of a radio communication unit is affected by a surrounding environment. SOLUTION: A reliability information calculation section 51 calculates reliability information such as the strength of a residual signal. A discrimination section 42 compares the reliability information with a preset threshold. When the reliability information is the threshold or over, a gain of an amplifier 4 is set on the basis of a control signal extracted by a demultiplexer 6 and when the reliability information is the threshold or below, the gain of the amplifier 4 is maintained as it is.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a radio communication apparatus, method, and medium, and more particularly, to a radio communication apparatus, method, and method for improving the control power of transmission power by increasing the reliability of control signals. And media.

[0002]

2. Description of the Related Art FIG. 1 shows a configuration example of a radio communication system. In this example, the base station BS (Base Statio
n) and a mobile station MS (mobile Station) constitute a wireless communication system. In this system, communication data is transmitted and received by a cell relay method in which data is transmitted while being divided into small chunks called cells. The base station BS functions as an access point to a fixed (wired) network, and relays communication data in communication between a plurality of mobile stations MS. Such an arrangement is used in a wide area wireless network, such as a hub-oriented wireless local area network, a cellular telephone network, or a packet wireless network.

In such a wireless communication system, the distance between the base station BS and the mobile station MS and the environment around the mobile station MS (the presence or absence of a building that interferes with radio waves or causes interference) are not fixed. Absent. Therefore, in order to perform stable communication, it is necessary to perform communication with transmission power adapted to the situation at the time of communication.

For this reason, the base station BS and the mobile station MS control the transmission power of each other when transmitting and receiving information. When the base station BS controls the transmission power of the mobile station MS, the base station B
The control signal is inserted into the transmission signal from S and transmitted to the mobile station MS, and the mobile station MS controls the transmission power at the next transmission based on the control signal. On the other hand, if the mobile station MS is the base station B
Also, when controlling the transmission power of S, a control signal is inserted into a transmission signal from the mobile station MS and transmitted to the base station BS, and the base station B
At S, the transmission power at the next transmission is controlled based on the control signal.

FIG. 2 is a block diagram showing a configuration example of the base station BS.

[0006] The channel encoder 1 encodes a transmission signal. The multiplexer (MUX) 2
The control signal generated by the control signal generator 11 is multiplexed with the transmission signal output from the channel encoder 1. The modulator 3 modulates the transmission signal output from the multiplexer 2 by a predetermined method. Amplifier 4
(Hereinafter referred to as amplifier) is a demultiplexer (De-MU
X) The gain of the transmission signal is determined based on the control signal input from 6, and the transmission signal input from the modulator 3 is amplified and output.

[0007] The signal received by the base station BS is input to the demodulation unit 5 and demodulated. The demultiplexer 6 demultiplexes the received signal, extracts a control signal generated by the mobile station MS from the received signal, outputs the control signal to the amplifier 4, and outputs an original data signal other than the control signal to the channel decoder 7. Output. The channel decoder 7 decodes a data signal. The control signal generator 11 in the demodulator 5 generates a control signal for controlling the next transmission power of the mobile station MS.

FIG. 3 is a block diagram showing a configuration example of the mobile station MS.

The mobile station MS has a channel encoder 21 to a control signal generator 31 whose basic configuration is the same as that of the channel encoder 1 to the control signal generator 11 of the base station BS. Is omitted.

Next, referring to the flowchart of FIG.
A procedure for transmitting a signal from the base station BS to the mobile station MS will be described.

In step S1, the channel encoder 1 encodes a transmission signal. In step S2, the control signal generator 11 generates a control signal for controlling the transmission power of the next transmission signal of the mobile station MS as a transmission signal. In step S <b> 3, the multiplexer 2 multiplexes the control signal generated by the control signal generator 11 with the transmission signal generated by the channel encoder 1 and outputs the multiplexed signal to the modulator 3. In step S4, the modulation section 3 modulates the transmission signal and outputs it to the amplifier 4. In step S5, the amplifier 4 amplifies the input transmission signal based on the control signal input from the demultiplexer 6, outputs the amplified signal, and ends the processing.

Next, referring to the flowchart of FIG.
The detailed procedure of the process of generating the control signal in step S2 in FIG. 4 will be described.

First, in step S11, base station B
S receives the signal output from the amplifier 24 of the mobile station MS, and the received signal is input to the demodulation unit 5. In step S12, the control device generation unit 11 included in the demodulation unit 5 calculates a control signal for controlling the next transmission power of the mobile station MS according to the situation such as the reception power and the like.
At 3, the control signal is mapped to the symbol and output to the multiplexer 2, and the process ends.

Next, referring to the flowchart of FIG.
The detailed procedure of the process of amplifying the transmission signal in step S5 of FIG. 4 will be described.

First, in step S21, the demultiplexer 6 extracts a control signal from the received signal and inputs the control signal to the amplifier 4. In step S22, the amplifier 4
Determines the gain of the amplification of the transmission signal input from the modulation unit 3 based on the control signal input from the demultiplexer 6, and the process ends.

On the mobile station MS side, the same processing as that on the base station BS side is performed. Using the above procedure, the base station BS and the mobile station MS control each other's transmission power.

[0017]

However, when the transmission path of the transmission signal is in a poor environment due to, for example, Doppler shift or fading, a control signal is inserted into the transmission signal as in the conventional case. In some cases, the receiving side may not be able to correctly receive the control signal by simply transmitting the control signal. In this case, since the receiving side performs control based on the erroneous control signal, the amplification factor of the next transmission signal is erroneously controlled.

For example, despite the fact that the base station BS transmits a control signal for increasing the transmission power, the mobile station MS
If the transmission power is reduced by mistake, communication may be interrupted. In the opposite case, if the transmission power is erroneously increased by the mobile station MS despite the fact that the base station BS is transmitting the control signal for reducing the transmission power, interference given to other users Is increased, which may affect the entire system.

The present invention has been made in view of such circumstances, and determines the reliability of a control signal generated by another wireless communication device, and adds an error correction code to a transmission signal including the control signal. By doing so, the reliability of the control signal is increased, and the control capability of the transmission power is improved.

[0020]

According to a first aspect of the present invention, there is provided a radio communication apparatus comprising: a generation unit configured to generate a control signal for controlling transmission power of another radio communication apparatus at the time of next transmission; Transmitting means for transmitting a transmission signal including the generated control signal to another wireless communication device, receiving means for receiving a transmission signal including the control signal generated and transmitted by another wireless communication device, and receiving means Determining means for determining the reliability of a control signal included in a transmission signal received by the control means, and control means for controlling transmission power of a transmission signal transmitted by the transmission means based on a result determined by the determination means. It is characterized by.

According to a sixth aspect of the present invention, in the wireless communication method, a generating step of generating a control signal for controlling transmission power of another wireless communication apparatus at the time of next transmission, and a control generated by the processing of the generating step A transmission step of transmitting a transmission signal including a signal to another wireless communication apparatus, a reception step of receiving a transmission signal including a control signal generated and transmitted by another communication apparatus, and a reception step of receiving the transmission signal. A determination step of determining the reliability of the control signal included in the transmission signal; and a control step of controlling the transmission power of the transmission signal transmitted by the processing of the transmission step based on a result determined by the processing of the determination step. It is characterized by including.

According to a seventh aspect of the present invention, there is provided a medium program, comprising: a generating step of generating a control signal for controlling transmission power of another wireless communication apparatus at the time of next transmission; and a control generated by the processing of the generating step. A transmission step of transmitting a transmission signal including a signal to another wireless communication apparatus, a reception step of receiving a transmission signal including a control signal generated and transmitted by another communication apparatus, and a reception step of receiving the transmission signal. A determination step of determining the reliability of the control signal; and a control step of controlling the transmission power of the transmission signal transmitted by the processing of the transmission step based on the result determined by the processing of the determination step. .

[0023] The wireless communication apparatus according to claim 8 is a generating means for generating a control signal for controlling the transmission power at the time of the next transmission of another wireless communication apparatus, and generating the control signal generated by the generating means. Adding means for adding an error correction code to the transmission signal including, a transmission signal including the error correction code added by the addition means, a transmission means for transmitting to another wireless communication device, generated by another wireless communication device, Receiving means for receiving a transmission signal including the transmitted control signal, error correction means for performing error correction using an error correction code included in the transmission signal received by the reception means, and transmission signal transmitted by the transmission means. Control means for controlling transmission power.

According to a fourteenth aspect of the present invention, in the wireless communication method, a generating step of generating a control signal for controlling transmission power of another wireless communication apparatus at the time of next transmission, and a control generated by the processing of the generating step An additional step of adding an error correction code to a transmission signal including a signal, a transmission step of transmitting a transmission signal including the error correction code added by the processing of the addition step to another wireless communication apparatus, and another wireless communication apparatus Receiving a received signal including a control signal generated and transmitted by the receiving step, a correcting step of performing error correction using an error correction code included in the transmitted signal received by the processing of the receiving step, and a processing of the transmitting step And controlling a transmission power of a transmission signal transmitted by the control unit.

The program of the medium according to claim 15 is:
A generating step of generating a control signal for controlling transmission power at the time of the next transmission of another wireless communication apparatus, and an adding step of adding an error correction code to the transmission signal including the control signal generated by the processing of the generating step And a transmission step of transmitting a transmission signal including the error correction code added by the processing of the addition step to another wireless communication apparatus, and a reception signal including a control signal generated and transmitted by another wireless communication apparatus. A reception step of receiving, a correction step of performing error correction using an error correction code included in the transmission signal received by the processing of the reception step, and a control step of controlling the transmission power of the transmission signal transmitted by the processing of the transmission step And characterized in that:

A wireless communication device according to claim 1, claim 6
In the wireless communication method described in (1) and the medium described in (7), the reliability of the control signal included in the received signal is determined, and the transmission power is controlled based on the determination result.

A wireless communication device according to claim 8, wherein
In the wireless communication method according to the fourth aspect and the medium according to the fifteenth aspect, an error correction code is added after a control signal is inserted into a transmission signal, and the transmission signal is transmitted. Then, a reception signal including a control signal generated by another wireless communication device and having an error correction code added thereto is received, and error correction is performed using the error correction code.

[0028]

FIG. 7 is a block diagram showing a configuration of a first embodiment of a base station BS to which the present invention is applied. Parts corresponding to those in the conventional case are denoted by the same reference numerals, and description thereof will be omitted as appropriate (hereinafter the same).
That is, this base station BS is provided with a demodulation unit 41 to which a reliability information calculation unit 51 for calculating reliability information of a received signal is further provided instead of the demodulation unit 5, and the base station BS receives a control signal. The configuration is basically the same as that in FIG. 2 except that a determination unit 42 for determining the signal reliability is newly provided. In this example,
The mobile station MS is configured similarly to the conventional case shown in FIG.

In the first embodiment, the procedure for transmitting a signal from the base station BS to the mobile station MS and the generation of a control signal for controlling the next transmission signal of the mobile station MS to be inserted into the transmission signal The procedure is the same as that of the conventional case shown in FIG. 4 and FIG.

Next, a procedure for determining the gain of the transmission signal in the first embodiment will be described with reference to FIG.

First, in step S 31, the reliability information calculation section 51 calculates reliability information from a received signal and inputs the information to the determination section 42. That is, the reliability information calculation unit 51
Is used as the reliability information, the residual signal strength (RSSI (Residual Signal Strength Intensity)) of the received signal, the carrier-to-noise ratio (CNR), or the carrier-to-interference ratio (CIR). )).

In step S32, the demultiplexer 6 extracts a control signal generated by the mobile station MS from the input received signal and outputs the control signal to the determination unit 42. The signal from which the control signal has been extracted is input to the channel decoder 7 and decoded.

In step S33, the judgment unit 42
Based on the reliability information input from the reliability information calculation unit 51, it is determined whether the reliability information satisfies the condition. That is, the determination unit 42 sets a threshold value in the reliability information as a determination condition, and determines that the condition is satisfied if the value of the reliability information calculated by the reliability information calculation unit 51 is larger than the threshold value. If it is smaller, it is determined that the condition is not satisfied. Alternatively, the determination unit 42 sets two thresholds, an upper limit and a lower limit, and determines that the condition is satisfied when the value of the reliability information calculated by the reliability information calculation unit 51 is within the threshold range. If it is out of the threshold range, it is determined that the condition is not satisfied.

If it is determined in step S33 that the reliability information satisfies the determination condition, the determination unit 42 outputs a control signal to the amplifier 4 in step S34. Then, the amplifier 4 determines the gain of the transmission power based on the input control signal, and the process ends.

If it is determined in step S33 that the reliability information does not satisfy the determination condition, the determination unit 42 outputs a control signal that does not change the transmission power to the amplifier 4 in step S35. Therefore, the amplifier 4 terminates the processing with the gain maintained as it is.

FIG. 9 shows a base station B to which the present invention is applied.
FIG. 5 is a block diagram illustrating a configuration of a second embodiment of S. That is, the base medical station BS is basically the same as the case in FIG. 2 except that a majority decision unit 61 that newly determines the reliability of a plurality of control signals received from the mobile station MS is provided. It is configured.

In the second embodiment, as shown in FIG. 10, time division duplex (TD
D (Time Division Duplex) method is used. When transmitting a signal to the mobile station MS, the same control signal is temporally dispersed and inserted into a transmission signal of several bursts (blocks), so that the transmission quality of the control signal is expected to be improved by the time diversity effect.

Next, a procedure for transmitting a signal in the second embodiment will be described with reference to a flowchart of FIG.

In step S41, the channel encoder 1 encodes a transmission signal. In step S42, the control signal generation unit 11 generates a control signal for controlling the transmission power of the next transmission signal of the mobile station MS as a transmission signal.

In step S43, the multiplexer 2 determines whether it is time to transmit in the time division duplex system. If it is determined in step S43 that the timing is not the transmission timing but the reception timing,
The process of step S43 is repeated until the transmission timing comes. If it is determined in step S43 that it is the transmission timing, the process proceeds to step S44, where the multiplexer 2 multiplexes the control signal generated by the control signal generation unit 11 with the transmission signal generated by the channel encoder 1. Then, the signal is output to the modulation unit 3.

In step S 45, the modulation section 3 modulates the transmission signal and outputs it to the amplifier 4. Step S46
, The amplifier 4 amplifies the input transmission signal based on the control signal input from the demultiplexer 6, and outputs the amplified transmission signal.

In step S47, the amplifier 4 determines whether the same control signal has been transmitted a predetermined number, for example, three times. If it is determined in step S47 that the signal has not been transmitted three times, the process proceeds to step S48, where the channel encoder 1 encodes the transmission signal. Then, the processing of steps S43 to S46 is repeated until it is determined in step S47 that the data has been transmitted three times. If it is determined in step S47 that the data has been transmitted three times, the process ends.

The procedure for generating a control signal for controlling the next transmission signal of the mobile station MS to be inserted into the transmission signal in the second embodiment is the same as that shown in FIG.

Next, the procedure for determining the gain of the transmission signal in step S46 in FIG. 11 will be described with reference to FIG.

In step S 51, the demultiplexer 6 extracts a control signal generated by the mobile station MS from the input signal, and outputs the control signal to the majority decision unit 61. The signal after the control signal extraction is input to the channel decoder 7,
Decrypted.

In step S52, the majority decision unit 6
1 indicates that the number of input control signals is counted, for example, when the mobile station MS inserts the same control signal into three bursts (blocks) during transmission (the value of n in step S47 in FIG. 11 is 3). Case), the three control signals are determined by the majority decision unit 6
Step S51, Step S52 until input to Step 1
Is repeated.

In step S53, the majority decision unit 6
1 performs a majority decision on three control signals and inputs the result to the amplifier 4. That is, the majority decision unit 6
1 is that when two or three control signals are equal among the three control signals, the control signals are output to the amplifier 4, and when the three control signals are different from each other. Transmits a signal that the transmission power is not changed
Output to

Finally, in step S54, the amplifier 4 sets the gain of the transmission power based on the determination result in step S53, and the process ends.

FIG. 13 is a block diagram showing the configuration of the third embodiment of the base station BS to which the present invention is applied. That is, in the third embodiment, instead of the determination unit 42 of FIG. 7, a weighting unit 71 that weights the control signal and a maximum ratio combining of the control signal weighted to determine the reliability of the control signal are performed. Is newly provided, and other configurations are basically the same as those in FIG.

In the third embodiment, a time division duplex system is used for transmission and reception, as in the second embodiment.

In the third embodiment, the procedure for transmitting a signal from the base station BS to the mobile station MS and the generation of a control signal for controlling the next transmission signal of the mobile station MS to be inserted into the transmission signal The procedure is shown in FIG. 11 and FIG.
Is the same as the case shown in FIG.

Next, a procedure for determining the gain of a transmission signal (details of step S46 in FIG. 11) in the third embodiment will be described with reference to FIG.

In this case, in steps S71 and S72, as in the case of steps S31 and S32 in FIG. 8, the calculation processing of the reliability information and the extraction processing of the control signal are performed, and the process proceeds to step S73.

In step S73, the weighting section 71
Weights the control signal input from the demultiplexer 6 based on the reliability information input from the reliability information information calculation unit 51 so that a higher weight is given to a control signal having higher reliability. The result is input to the maximum ratio combining / determining section 72.

In step S74, the maximum ratio combining / determining section 72 counts the number of control signals. For example, when the mobile station MS inserts the same control signal into three bursts (blocks) during transmission, Steps S71 to S74 are repeated until three received signals are input.

After the three control signals are input, the maximum ratio combining / determining section 72 performs the maximum ratio combining of the three input control signals and inputs the determination result to the amplifier 4 in step S75. That is, the control signals weighted by the reliability information are added, and the result is input to the amplifier 4.

Finally, in step S76, the amplifier 4 sets the gain of the transmission power based on the determination result in step S75, and the process ends.

In the first to third embodiments, the present invention is applied to the base station BS in the radio communication system including the base station BS and the mobile station MS. It is also conceivable to apply the present invention to both the base station BS and the mobile station MS. However, when the present invention is applied only to the base station BS, it is considered that there is a sufficient effect in consideration of the mounting surface and the transmission power.

FIG. 15 shows a base station BS to which the present invention is applied.
FIG. 14 is a block diagram illustrating a configuration of a fourth embodiment.
That is, in the fourth embodiment, the multiplexer 2
Are arranged before the channel encoder 1, and
The demultiplexer 6 is arranged after the channel decoder 7. Other configurations are the same as those in FIG.

Next, using the flowchart of FIG.
In the fourth embodiment, the mobile station MS
The procedure for transmitting a signal to the server will be described.

In step S 91, the control signal generator 11 generates a control signal for controlling the transmission power of the next transmission signal of the mobile station MS from the received signal, and outputs the control signal to the multiplexer 2. In step S92, the multiplexer 2 multiplexes the control signal into the transmission signal,
Output to the channel encoder 1. In step S93, the channel encoder 1 encodes the transmission signal and adds an error correction code. That is, the error correction code is added to not only the original data signal but also the entire transmission signal including the control signal and the data signal. In step S94, the modulation section 3 modulates the transmission signal and outputs it to the amplifier 4. In step S95, the amplifier 4
Amplifies the input transmission signal based on the control signal input from the demultiplexer 6, outputs the amplified signal, and ends the processing.

The procedure for generating a control signal for controlling the transmission power of the next transmission signal of the mobile station MS in step S91 in FIG. 16 is the same as that in the conventional case shown in FIG. The details of the procedure for determining the gain setting value of the transmission signal in step S95 of FIG. 16 will be described with reference to the flowchart of FIG.

In step S101, the channel decoder 7 includes a control signal generated by the mobile station MS,
The received signal to which the error correction code is added is decoded. At this time, if an error is found in the received signal, this is corrected. Next, step S102 and step S103
In step S21 and step S2 in FIG.
Similarly to 2, the control signal extraction processing and the gain determination processing based on the extracted control signal are performed, and the processing ends.

FIG. 18 shows a base station BS to which the present invention is applied.
FIG. 14 is a block diagram showing a configuration of the fifth embodiment.
That is, the fifth embodiment has the same configuration as that of FIG. 7 except that the multiplexer 2 is arranged before the channel encoder 1 and the demultiplexer 6 is arranged after the channel decoder 7. Have been.

In the fifth embodiment, the procedure for transmitting a signal from the base station BS to the mobile station MS and the procedure for transmitting a signal from the mobile station M
The generation procedure of the control signal for controlling the transmission power of the transmission signal next to S is the fourth procedure shown in FIG. 16 or FIG.
This is the same as the embodiment.

Next, referring to FIG. 19, the procedure for determining the gain setting value of the transmission signal in the fifth embodiment (FIG. 1)
(Step S95 of Step 6) will be described.

In step S131, the channel decoder 7 includes the control signal generated by the mobile station MS,
The received signal to which the error correction code is added is decoded. At this time, if an error is found in the received signal, this is corrected. Next, in steps S132 to S136,
The same processing as in steps S31 to S35 in FIG. 8 is performed, and the processing ends.

FIG. 20 shows a base station BS to which the present invention is applied.
FIG. 16 is a block diagram illustrating a configuration of a sixth embodiment.
That is, the sixth embodiment has the same configuration as that in FIG. 9 except that the multiplexer 2 is arranged before the channel encoder 1 and the demultiplexer 6 is arranged after the channel decoder 7. Have been.

In the sixth embodiment, the procedure for transmitting a signal from the base station BS to the mobile station MS, and the procedure for transmitting a signal from the mobile station M
The generation procedure of the control signal for controlling the transmission power of the transmission signal following S is shown in FIG. 16 or FIG.
This is the same as the embodiment.

Next, a procedure for determining a gain setting value of a transmission signal in the sixth embodiment will be described with reference to FIG. Here, as in the second embodiment, the time division duplex system is used.

In step S151, the channel decoder 7 includes the control signal generated by the mobile station MS,
The received signal to which the error correction code is added is decoded. At this time, if an error is found in the received signal, this is also corrected. Next, in steps S152 to S155, the same processing as in steps S51 to S54 of FIG. 12 is performed, and the processing ends.

FIG. 21 shows a base station BS to which the present invention is applied.
It is a block diagram showing composition of a 7th embodiment.
That is, the seventh embodiment has the same configuration as that of FIG. 13 except that the multiplexer 2 is arranged before the channel encoder 1 and the demultiplexer 6 is arranged after the channel decoder 7. Have been.

In the seventh embodiment, the procedure for transmitting a signal from the base station BS to the mobile station MS and the procedure for transmitting the signal from the mobile station M
The generation procedure of the control signal for controlling the transmission power of the transmission signal following S is shown in FIG. 16 or FIG.
This is the same as the embodiment.

Next, a procedure for determining a gain setting value of a transmission signal in the seventh embodiment will be described with reference to FIG. Here, as in the second embodiment, the time division duplex system is used.

At step S171, the channel decoder 7 includes the control signal generated by the mobile station MS,
The received signal to which the error correction code is added is decoded. At this time, if an error is found in the received signal, this is corrected. Next, in steps S172 to S177, the same processes as those in steps S71 to S76 in FIG. 13 are performed, and the process ends.

In the fourth to seventh embodiments, the case where the present invention is applied to the base station BS has been described. However, the present invention may be applied to both the base station BS and the mobile station MS.

The series of processes described above can be executed by hardware, but can also be executed by software. When a series of processing is executed by software, a program constituting the software is installed in a wireless communication device as dedicated hardware, or various programs are installed by installing various programs. For example, it is installed in a general-purpose personal computer or the like that can execute the functions described above.

Next, referring to FIG. 24, a program for executing the above-described series of processes is installed in a computer, and a computer used for making the computer executable is a general-purpose personal computer. The following is an example of the case.

As shown in FIG. 24A, a program is stored in a hard disk 202 or a semiconductor memory 2 as a recording medium built in a personal computer 201.
03 in advance.

Alternatively, the program is executed as shown in FIG.
As shown in (B), the floppy disk 211 and the CD-R
OM (Compact Disk-Read Only Memory) 212, MO (Mag
neto-Optical) Disc 213, DVD (Digital Versatile)
Disk) 214, magnetic disk 215, semiconductor memory 21
6, etc., temporarily or permanently stored in a recording medium,
It can be provided as package software.

Further, as shown in FIG. 24C, the program is wirelessly transferred from a download site 221 to a personal computer 223 via an artificial satellite 222 for digital satellite broadcasting, a local area network, and the Internet. Network 224
, And can be transferred to the personal computer 223 by wire, and stored in a built-in hard disk or the like in the personal computer 223.

The personal computer 201 (the personal computer 223 is also a personal computer 201)
The configuration is the same as that of the CPU (not shown), for example, as shown in FIG.
Unit 341. The CPU 341 allows a user to input a keyboard,
When a command is input from an input unit 347 including a mouse or the like, the semiconductor memory 20 shown in FIG.
3 or executes a program stored in a ROM (Read Only Memory) 342 corresponding to
m Access Memory) 343, and the processing result is output to a display unit 346 such as an LCD (Liquid Crystal Display) via the input / output interface 345.

The medium in the present specification means a broad concept including all these media.

In this specification, the step of describing a program provided by a medium is not limited to processing performed in chronological order in the described order, but is not necessarily performed in chronological order. It also includes processes that are executed individually or individually.

In this specification, the system is
It represents the entire device composed of a plurality of devices.

[0086]

According to the wireless communication apparatus of the first aspect, the wireless communication method of the sixth aspect, and the medium of the seventh aspect, the reliability of a control signal received from another wireless communication apparatus. Is determined and the transmission power is controlled in accordance with the result of the determination, so that even if the received control signal is affected by the surrounding environment, it will affect the control signal that has lost reliability. , And stable transmission power control can be performed.

A wireless communication apparatus according to claim 8, wherein
According to the wireless communication method described in claim 4 and the medium described in claim 15, an error of a control signal for controlling transmission power is corrected by an error correction code. Thus, the transmission power is prevented from being controlled.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a configuration of a wireless communication system.

FIG. 2 is a block diagram showing a configuration of a base station BS in FIG.

FIG. 3 is a block diagram showing a configuration of a mobile station MS of FIG.

FIG. 4 is a flowchart for explaining a procedure in which the base station BS in FIG. 2 transmits a signal.

FIG. 5 is a flowchart for explaining details of a procedure for generating a control signal in step S2 of FIG. 4;

FIG. 6 is a flowchart for explaining details of a procedure for determining a gain of a transmission signal in step S5 of FIG. 4;

FIG. 7 is a block diagram illustrating a configuration example of a first embodiment of a base station BS to which the present invention has been applied.

8 is a flowchart illustrating details of a procedure in which a base station BS in FIG. 7 determines a gain of a transmission signal.

FIG. 9 is a block diagram illustrating a configuration example of a second embodiment of a base station BS to which the present invention has been applied.

FIG. 10 is a diagram for explaining a time division duplex method.

FIG. 11 is a flowchart illustrating details of a procedure for transmitting a signal by the base station BS in FIG. 9;

FIG. 12 is a flowchart illustrating details of a procedure for setting a gain of a transmission signal in step S46 in FIG. 11;

FIG. 13 is a block diagram illustrating a configuration example of a third embodiment of a base station BS to which the present invention has been applied.

14 is a flowchart illustrating details of a procedure in which a base station BS in FIG. 13 determines a gain of a transmission signal.

FIG. 15 is a block diagram illustrating a configuration example of a fourth embodiment of a base station BS to which the present invention has been applied.

FIG. 16 is a flowchart illustrating a procedure in which the base station BS in FIG. 14 transmits a signal.

FIG. 17 is a flowchart illustrating details of a procedure in which a base station BS in FIG. 14 determines a gain of a transmission signal.

FIG. 18 is a block diagram illustrating a configuration example of a fifth embodiment of a base station BS to which the present invention has been applied.

19 is a flowchart illustrating details of a procedure in which a base station BS in FIG. 18 determines a gain of a transmission signal.

FIG. 20 is a block diagram illustrating a configuration example of a sixth embodiment of the base station BS to which the present invention has been applied.

FIG. 21 is a flowchart illustrating details of a procedure in which a base station BS in FIG. 20 sets a gain of a transmission signal.

FIG. 22 is a block diagram illustrating a configuration example of a seventh embodiment of the base station BS to which the present invention has been applied.

FIG. 23 is a flowchart illustrating a procedure in which the base station BS in FIG. 22 determines a gain of a transmission signal.

FIG. 24 is a diagram showing a medium.

FIG. 25 is a block diagram illustrating a configuration of a personal computer.

[Explanation of symbols]

1 channel encoder, 2 multiplexers,
3 modulation section, 4 amplifier, 5 demodulation section,
6 demultiplexer, 7 channel decoder,
11 control signal generation section, 41 demodulation section, 42 determination section, 51 reliability information calculation section, 61 majority decision section, 71 weighting section, 72 maximum ratio combining / determining section

Claims (15)

[Claims] 1. A wireless communication device that wirelessly communicates with another wireless communication device, wherein: a generating unit that generates a control signal for controlling a transmission power of the another wireless communication device during a next transmission; Transmitting means for transmitting a transmission signal including a control signal generated by the means to the other wireless communication device; and receiving means for receiving a transmission signal including a control signal generated and transmitted by the other wireless communication device. Determining means for determining the reliability of a control signal included in the transmission signal received by the reception means; controlling transmission power of the transmission signal transmitted by the transmission means based on a result determined by the determination means A wireless communication device comprising: 2. The information processing apparatus according to claim 1, further comprising: a calculating unit configured to calculate reliability information of a control signal included in the transmission signal received by the receiving unit; and a setting unit configured to set a threshold value for the reliability information. The wireless communication device according to claim 1, wherein the reliability is determined by comparing the reliability information with the threshold. 3. The apparatus according to claim 1, further comprising an insertion unit that inserts the control signal generated by the generation unit into the transmission signal transmitted by the transmission unit at predetermined time intervals, wherein the determination unit includes the predetermined time interval. 2. The wireless communication apparatus according to claim 1, wherein the reliability is determined by majority decision based on a control signal included in the transmission signal received by the receiving unit, which is inserted every time. 4. A calculating means for calculating reliability information of a control signal included in a transmission signal received by the receiving means, and a control signal generated by the generating means, as a transmission signal transmitted by the transmitting means, Inserting means for inserting at a predetermined time interval; weighting means for weighting a control signal included in a transmission signal received by the receiving means using the reliability information; included in a transmission signal received by the receiving means. And a synthesizing unit that performs maximum ratio combining on the control signal weighted by the weighting unit, wherein the determining unit determines reliability using the maximum ratio combined control signal. The wireless communication device according to claim 1, wherein: 5. A calculating means for calculating reliability information of a control signal included in a transmission signal received by the receiving means, wherein the calculating means includes a residual signal strength, a propagation noise ratio as the reliability information. The wireless communication device according to claim 1, wherein any one of a propagation wave interference ratio and a propagation wave interference ratio is used. 6. A wireless communication method for wirelessly communicating with another wireless communication device, wherein: a generating step of generating a control signal for controlling transmission power of the another wireless communication device at the time of next transmission; A transmitting step of transmitting a transmission signal including the control signal generated by the processing of the step to the another wireless communication device; and a receiving step of receiving a transmission signal including the control signal generated and transmitted by the other communication device. Step, a determining step of determining the reliability of the control signal included in the transmission signal received by the processing of the receiving step, and transmitting by the processing of the transmitting step based on a result determined by the processing of the determining step. Controlling the transmission power of the transmission signal to be transmitted. 7. A program for wireless communication that wirelessly communicates with another wireless communication device, wherein a generation step of generating a control signal for controlling transmission power of the another wireless communication device at the time of next transmission is performed. Transmitting a transmission signal including a control signal generated by the processing of the generation step to the another wireless communication device; and a transmission signal including a control signal generated and transmitted by the other communication device. Receiving, receiving, a determining step of determining the reliability of the control signal received by the processing of the receiving step, and transmitting by the processing of the transmitting step based on a result determined by the processing of the determining step And a control step of controlling a transmission power of a signal. 8. A wireless communication device that wirelessly communicates with another wireless communication device, wherein: a generating unit that generates a control signal for controlling transmission power of the another wireless communication device at the time of next transmission; Adding means for adding an error correction code to the transmission signal including the control signal generated by the means, and transmitting means for transmitting the transmission signal including the error correction code added by the addition means to the other wireless communication device; Receiving means for receiving a transmission signal including a control signal generated and transmitted by the other wireless communication device; and error correction for performing error correction using an error correction code included in the transmission signal received by the reception means. Means, and control means for controlling transmission power of a transmission signal transmitted by the transmission means. 9. The image processing apparatus according to claim 1, further comprising a determination unit configured to determine a reliability of a control signal included in the transmission signal received by the reception unit, wherein the control unit transmits the control signal based on a result of the reliability determination unit. The wireless communication apparatus according to claim 8, wherein the transmission power of the transmitted transmission signal is controlled. 10. A calculating unit for calculating reliability information of a control signal included in a transmission signal received by the receiving unit, and a setting unit for setting a threshold value for the reliability information, wherein the determining unit includes: The wireless communication apparatus according to claim 9, wherein the reliability is determined by comparing the reliability information with the threshold. 11. An apparatus according to claim 11, further comprising: an insertion unit that inserts the control signal generated by the generation unit into a transmission signal transmitted by the transmission unit at predetermined time intervals. 10. The wireless communication apparatus according to claim 9, wherein the reliability is determined by majority decision based on a control signal included in the transmission signal received by the receiving unit, which is inserted every time. 12. A calculating means for calculating reliability information of a control signal included in a transmission signal received by the receiving means, and a control signal generated by the generating means, the transmission signal transmitted by the transmitting means, Inserting means for inserting the signal every predetermined time; weighting means for weighting a control signal included in the transmission signal received by the receiving means using the reliability information; control included in the transmission signal received by the receiving means Synthesizing means for maximizing the ratio of the signal based on the control signal weighted by the weighting means, wherein the judging means judges the reliability using the control signal having the maximal ratio synthesized. The wireless communication device according to claim 9. 13. A computer further comprising: calculating means for calculating reliability information of a control signal included in a transmission signal received by the receiving means, wherein the calculating means includes, as the reliability information, a residual signal intensity and a propagation noise ratio. 10. The wireless communication apparatus according to claim 9, wherein any one of the propagation wave interference ratio is used. 14. A wireless communication method for wirelessly communicating with another wireless communication device, wherein a generating step of generating a control signal for controlling a transmission power of the another wireless communication device at the time of next transmission; Adding an error correction code to the transmission signal including the control signal generated by the processing of the step, and transmitting the transmission signal including the error correction code added by the processing of the addition step to the other wireless communication device A receiving step of receiving a received signal including a control signal generated and transmitted by the other wireless communication device, and using an error correction code included in the transmitted signal received by the processing of the receiving step. A correction step of performing error correction; and a control step of controlling transmission power of a transmission signal transmitted by the processing of the transmission step. A wireless communication method comprising: 15. A program for wireless communication that wirelessly communicates with another wireless communication device, wherein a generating step of generating a control signal for controlling transmission power of the another wireless communication device at the time of next transmission. An adding step of adding an error correction code to the transmission signal including the control signal generated by the processing of the generation step; and transmitting the transmission signal including the error correction code added by the processing of the addition step to the other radio A transmitting step of transmitting to a communication device; a receiving step of receiving a received signal including a control signal generated and transmitted by the other wireless communication device; and an error correction included in the transmitted signal received by the processing of the receiving step. A correction step of performing error correction using a code, and a control step of controlling transmission power of a transmission signal transmitted by the processing of the transmission step. A medium which causes a computer to execute a program characterized by including: