JP2003169006A - Device and method for radio communication - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To carry on communication service even if trouble relating to a transmission diversity function occurs to a base-station device having the transmission diversity function. <P>SOLUTION: A transmit signal of voice, data, etc., is encoded by an encoding part 101. In a signal processing system for an antenna A, a signal processing part 102 for the antenna A performs specific signal processing and a spreading/ modulation part 103 performs spreading and modulation. After a transmission power amplification part 104 performs power amplification, the signal is sent through the antenna A105, respectively. Even in a signal processing system for an antenna B, a transmit signal is similarly generated. If trouble occurs to a part relating to the transmission diversity function of the base-station device, a trouble detection part 110 detects the trouble and a processing switching setting part 111 stops the function of the signal processing system whose trouble is detected and performs switching to settings for normal transmission from the signal processing system where no trouble is detected. <P>COPYRIGHT: (C)2003,JPO

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 and a wireless communication method, and can be applied to, for example, a base station device having a transmission diversity function.

[0002]

2. Description of the Related Art FIG. 6 shows a configuration of a conventional radio communication system having a transmission diversity function disclosed in Japanese Patent Laid-Open No. 2001-044900, which includes a base station apparatus 10 and a radio station apparatus 20. ing. Base station device 10
Includes an STTD (Space Time Transmit Diversity) encoding unit 11 and a transmission antenna 12, and the wireless station device 2
0 includes a receiving antenna 21, a despreading unit 22, an open and closed loop diversity decoding unit 23, a deinterleaver 24, a channel coding unit 25, and a channel evaluation unit 26.

In the base station apparatus 10, the transmission signal subjected to the transmission diversity processing by the STTD encoding unit 11 is transmitted from the transmission antenna 12, and in the radio station apparatus 20, the reception antenna 21 receives the signal from the base station apparatus 10. , The despreading unit 22, the open / closed loop diversity decoding unit 23, the deinterleaver 24, the channel coding unit 25, and the channel evaluation unit 26 perform transmission diversity. As described above, according to the configuration of the base station device 10 having the transmission diversity function, it is possible to solve the problem of multipath by taking advantage of the characteristics of open loop diversity and closed loop diversity.
Incidentally, the open loop diversity is a transmission diversity method that does not use feedback from the receiving apparatus, and the closed loop diversity is a transmission diversity method that uses feedback from the receiving apparatus.

[0004]

However, when a failure related to the transmission diversity function (hereinafter, simply referred to as "failure") occurs, not only the effect of the transmission diversity is lost but also the communication service is continued. I had the problem that I couldn't. Here, failure means that normal functions cannot be performed due to failure of various parts or deterioration over time.

The reason for having the above problem is that when a failure occurs, the transmission diversity is performed only by the functional section that operates normally. In the time switching diversity, the transmission information is lost, and in the closed loop diversity, the control information is lost. If a malfunction occurs and the transmission power is reduced, and the transmission power is reduced in open loop diversity, the time required for the cell search by the wireless station device increases or the cell search becomes impossible. Cannot continue the communication service. In addition, when a failure occurs, the base station device may not be able to notify the higher-order control device of the power of the multiplex signal. And the actual multiplex signal does not match, the host controller cannot properly understand the user capacity of the base station device after the occurrence of the failure, and the call admission control cannot be performed correctly. Cannot continue the communication service.

The present invention solves the above-mentioned conventional problems. In a base station apparatus having a transmission diversity function, a base station apparatus capable of continuing communication service even when a failure related to the transmission diversity function occurs. The purpose is to provide.

[0007]

In order to solve the above problems, a wireless communication apparatus of the present invention is a wireless communication apparatus configured to perform transmission diversity by transmitting signals from a plurality of antennas. Forming a signal to be transmitted from the antenna, a plurality of transmission signal forming means provided corresponding to the plurality of antennas, to detect a failure that is an abnormal state that can not exhibit a normal transmit diversity function, Failure detection means for specifying the transmission signal forming means in which a failure has been detected, processing switching setting means for stopping the function of the transmission signal forming means in which a failure has been detected,
The configuration including is adopted.

In the wireless communication apparatus of the present invention, the processing switching setting means not only stops the function of the transmission signal forming means in which a failure is detected, but also changes the processing of the transmission signal forming means which is not stopped. .

According to these configurations, in the base station apparatus having the transmission diversity function, even if a failure related to the transmission diversity function occurs, the function of the transmission signal forming means in which the failure has occurred is stopped and the other one of the transmissions is transmitted. By performing transmission processing that does not apply transmission diversity using the signal forming means, it is possible to avoid the malfunction of control and the decrease in transmission power, which were problems in closed loop diversity when a failure occurs, and open loop diversity is used. It is possible to avoid a decrease in transmission power, which is a problem.

In the wireless communication apparatus of the present invention, when the processing switching setting means detects a failure related to the transmission diversity function, the transmission power of the transmission signal formed by the transmission signal forming means in which no failure is detected is applied to the transmission diversity application. Use a configuration that is larger than time.

According to this structure, when the transmission diversity is applied, the transmission signal formed by each transmission signal forming means is transmitted with low transmission power, but the function of the transmission signal forming means in which a failure is detected is stopped. Therefore, the transmission signal formed by the transmission signal forming unit in which no failure is detected has a higher transmission power than that at the time of applying the transmission diversity,
Normal communication can be performed.

The host control device of the present invention is a host control device that is connected to a plurality of wireless communication devices and administers the plurality of wireless communication devices. Information from the wireless communication device is indicative of a failure related to the transmission diversity function. A configuration is provided that includes failure information receiving means for receiving, and call setting information managing means for managing a call based on information indicating a failure related to the transmission diversity function from the wireless communication device.

In the host controller of the present invention, when the fault information receiving means receives the information indicating the fault relating to the transmission diversity function of the wireless communication device, the call setting information management means causes the fault information of each wireless communication device to A configuration is adopted in which whether or not a call can be accepted is comprehensively determined based on the call setting information of the wireless communication device and / or the antenna power value of each wireless communication device.

According to these configurations, in the base station apparatus having the transmission diversity function, even when a failure related to the transmission diversity function occurs, the function of the transmission signal forming means in which the failure has occurred is stopped and the other one of the transmissions is transmitted. The communication service can be continued by performing a normal transmission process that does not perform transmission diversity using the signal forming means. Further, since the content of the fault is managed by the upper control device, control (call setting control) corresponding to the change of the resource after the transmission diversity function is stopped can be performed based on the comprehensive judgment.

The wireless communication apparatus of the present invention comprises a failure notifying means for notifying the partner wireless station apparatus that the function of the transmission signal forming means in which a failure has been detected will be stopped when a failure related to the transmission diversity function is detected. Adopt a configuration that has.

The radio station apparatus of the present invention has a configuration in which the transmission diversity function is stopped upon receiving the above notification.

According to these configurations, in the base station device having the transmission diversity function, even when a failure related to the transmission diversity function occurs, the function of the transmission signal forming means in which the failure has occurred is stopped and the other one of the transmissions is transmitted. It is possible to continue the communication service by performing a normal transmission process without performing the transmission diversity using the signal forming means, and notify the counterpart wireless station device of the processing content for the failure to stop the transmission diversity function, By stopping the transmission diversity function of the wireless station device as well, the power consumption of the wireless station device can be suppressed. Further, there is a possibility that a noise signal may be received if reception processing is performed even though the base station apparatus does not transmit a signal that has been subjected to transmission diversity processing, and this can be avoided.

The radio communication method of the present invention is a radio communication method adapted to perform transmission diversity by transmitting signals from a plurality of antennas, and signals transmitted from the plurality of antennas by a plurality of processing systems, respectively. To detect whether or not there is an abnormal state in which one of the processing systems cannot exhibit the normal transmission diversity function, and stops the function of the processing system in which a failure is detected. The processing of the processing system that does not stop is changed so that the transmission power of the transmission signal formed by the processing system in which no failure is detected is made higher than that when the transmission diversity is applied.

According to this method, in a wireless communication device having a transmission diversity function, even when a failure related to the transmission diversity function occurs, the function of the processing system in which the failure has occurred is stopped and the other processing system is used. By performing transmission processing that does not apply transmission diversity by
When a failure occurs, it is possible to avoid a malfunction of control and a decrease in transmission power, which are problems in closed loop diversity, and it is possible to avoid a decrease in transmission power that is a problem in open loop diversity. In addition, the transmission signal formed by each processing system when transmitting diversity was transmitted with low transmission power, but since the function of the processing system in which the failure was detected is stopped, the transmission signal formed by the processing system in which no failure was detected is stopped. The transmission signal to be formed can perform normal communication by making the transmission power higher than that when the transmission diversity is applied.

A radio communication system of the present invention is a communication system comprising a plurality of base station devices and a host controller for controlling them, each base station device forming a signal to be transmitted from a plurality of antennas, A plurality of transmission signal forming means provided corresponding to the plurality of antennas, when detecting a failure related to the transmission diversity function, failure notification means for notifying the host controller of information indicating the detected transmission signal forming means, Receiving means for receiving information for stopping the function of the transmission signal forming means from the host controller, and processing for stopping the function of the transmitting signal forming means in which a failure is detected according to the information received by the process switching receiving means. And a switching setting means, wherein the higher-level control device receives the failure information reception information for receiving information indicating a failure related to the transmission diversity function from the wireless communication device. Means and the failure information receiving means, when receiving information indicating a failure related to the transmission diversity function of the wireless communication device, determines to stop the function of the transmission signal forming means of the wireless communication device in which the failure is detected. A configuration is provided that includes a process switching determining unit and a process switching notifying unit that notifies the wireless communication device of the content determined by the process switching determining unit.

According to this structure, in the base station apparatus having the transmission diversity function, even when a failure related to the transmission diversity function occurs, the host controller stops the function of the failed transmission signal forming means and leaves the rest. The communication service can be continued by using one of the transmission signal forming means and performing a normal transmission process without transmission diversity.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION The essence of the present invention is, in a base station device having a transmission diversity function, when a failure occurs in a processing system, the function of the processing system in which the failure has occurred is stopped, and no failure occurs. It is to perform communication that does not apply transmission diversity using a processing system. The processing system mentioned here means a functional block group that forms a transmission signal to be transmitted from the corresponding antenna.

Embodiments of the present invention will be described below with reference to the drawings.

(Embodiment 1) FIG.1 is a block diagram showing a configuration of a base station apparatus according to Embodiment 1 of the present invention. In FIG. 1, an encoding unit 101 encodes a transmission signal such as voice or data, and an antenna A signal processing unit 1
02 and antenna B signal processing section 106. The antenna A signal processing unit 102 performs signal processing for the antenna A on the encoded transmission signal, and the spreading / modulation unit 10
Output to 3. The spreading / modulating unit 103 spreads and modulates the signal-processed transmission signal, and the transmission power amplification unit 1
Output to 04. The transmission power amplification unit 104 amplifies the spread and modulated transmission signal to the transmission power for the transmission antenna A, and transmits it via the antenna A 105.

The antenna B signal processing unit 106 performs signal processing for the antenna B on the encoded transmission signal,
Output to the spreading / modulating unit 107. Spreading / modulating unit 107
Spreads and modulates the signal-processed transmission signal, and outputs the transmission signal to transmission power amplification section 108. The transmission power amplification unit 108 amplifies the spread and modulated transmission signal to the transmission power for the transmission antenna B, and transmits it via the antenna B109.

The fault detection unit 110 detects a fault location in each unit associated with each transmission antenna and notifies the process switching setting unit 111 of the fault location. The process switching setting unit 111
The processing content is switched so that the function of the processing system in which the failure has occurred is stopped and the transmission processing that does not apply the transmission diversity is performed using the other processing system.

Next, the operation of the base station apparatus having the above configuration will be described. Transmission signals such as voice and data are encoded by the encoding unit 101, and the antenna A signal processing unit 1
02 and antenna B signal processing section 106. The transmission signal for antenna A processed by the signal processing unit for antenna A 102 is spread and modulated by the spreading / modulating unit 103. The spread and modulated transmission signal for antenna A is amplified by the transmission power amplification section 104 to the transmission power requested by the wireless station device, and the antenna A1 is transmitted.
Sent via 05.

On the other hand, the transmission signal for antenna B processed by the signal processing unit for antenna B 106 is spread and modulated by the spreading / modulating unit 107. The spread and modulated transmission signal for the transmission antenna B is transmitted by the transmission power amplifier 1
08, the power is amplified to the transmission power requested by the wireless station device and transmitted via the antenna B109.

The transmission diversity method is an open loop
In the case of diversity, each antenna signal processing unit increases the transmission power of one transmission signal by 0.5. In addition, the transmission power of the other transmission signal is increased by 0.5 and STTD
(Space Time Transmit Diversity) Performs encoding processing. In the case of closed loop diversity, the transmission power of one transmission signal is set to 0.5 times, 0.2 times, or 0.8 times. The transmission power of the other transmission signal is 0.5 times when the transmission power of one transmission signal is 0.5 times, and 0.8 times when the transmission power of one transmission signal is 0.2 times. When the transmission power of the transmission signal is 0.8 times, it is 0.2 times and the phase on the IQ plane is rotated by 45 degrees. However, depending on the device configuration, the transmission power processing may be performed by the transmission power amplifier.

As described above, the base station apparatus implements the communication service by using the transmission diversity function, and the antenna A signal processing unit 102 and the spreading / modulation unit 103 which are the processing system for the antenna A related to the transmission diversity function. , Transmission power amplification section 104, antenna A 105 or antenna B signal processing section 106 which is a processing system for antenna B, spreading / modulation section 107, transmission power amplification section 108, antenna B
When a failure occurs in 109, the failure detection unit 110 detects the failure and identifies which of the processing system for the antenna A and the processing system for the antenna B has the failure. Possible causes of failure include component failure and aging deterioration in each block.

As a method of detecting a failure, each block in the processing system periodically sends a specific signal to the failure detecting section 110.
And the failure detection unit 110 determines that there is a failure when the periodic signal cannot be detected.
Periodically outputs a specific signal to each block in the processing system, each block replies to the specific signal, and the failure detection unit 110 determines a block that has not returned as a failure.

Then, the processing switching setting unit 111 stops the function for all blocks in the processing system in which the failure has occurred, and uses the remaining one processing system to perform the transmission processing without applying the transmission diversity. Switch.

Specifically, for example, in the case of a base station apparatus that has performed open loop diversity, the antenna A
It is assumed that the transmission signal processing unit 102 increases the transmission power of the transmission signal by 0.5, the antenna B signal processing unit 106 increases the transmission power of the transmission signal by 0.5, and the STTD encoding process is performed. In this base station device, when a failure occurs in the processing system for antenna A, the function of the processing system for antenna A is stopped, and the transmission power control and the encoding process performed by the signal processing unit for antenna B are performed. Stop and switch to processing that does not perform control related to transmit diversity.

As a result, it is possible to avoid the malfunction of the control and the reduction of the transmission power which are the problems in the closed loop diversity when the failure occurs, and to avoid the reduction of the transmission power which is the problem in the open loop diversity. be able to.

As described above, according to the embodiment of the present invention, in the base station apparatus having the transmission diversity function, even if a failure related to the transmission diversity function occurs, the function of the processing system in which the failure occurs is stopped. The communication service can be continued by performing the normal transmission process without the transmission diversity using the other processing system.

(Embodiment 2) FIG.2 is a block diagram showing a configuration of a base station apparatus according to Embodiment 2 of the present invention. 2, the same parts as those in FIG. 1 are designated by the same reference numerals as those in FIG. 1, and detailed description thereof will be omitted.

The fault detecting unit 201 detects a fault location in each unit associated with each transmitting antenna and notifies the fault notifying unit 202.

The fault notifying section 202 notifies the fault content detected by the fault detecting section 201 to the application for controlling the base station apparatus or the application for the wireless network control switch, which is the higher-level control apparatus.

The process switch receiving unit 203 receives the switch process contents determined by the base station device control application or the wireless network control switch application and outputs them to the process switch setting unit 204. The host controller having the application for base station control and the application for wireless network control exchange will be described later.

The process switching setting unit 204 switches the process contents so that the function of the process system in which the failure has occurred is stopped and the transmission process not applying the transmit diversity is performed using the other process system.

FIG. 3 is a block diagram showing the configuration of the host controller according to the second embodiment of the present invention. In FIG. 3, when a failure occurs in the base station apparatus, the failure information receiving unit 301 receives the details of the failure notified from the base station apparatus, and outputs it to the process switching determining unit 302.

The process switching decision unit 302 decides to switch the processing system of the base station device based on the fault information of the base station device received by the fault information receiving unit 301, and sets the decision contents to the process switching notification unit 303 and call setting. The information is output to the information management unit 306.

The process switching notifying unit 303 notifies the base station device that the processing system of the base station device in which the failure is detected is stopped based on the determination result output from the process switching determining unit 302.

Antenna power measuring section 304 measures the power of each antenna of the base station apparatus connected to the host control apparatus and outputs the measurement result to call setting information managing section 306.

The call setting information receiving unit 305 receives the call setting information of the base station apparatus connected to the upper control apparatus from each base station apparatus.

The call setting information management unit 306 collectively manages the call setting status of the base station apparatus connected to the host control apparatus. That is, it is possible to grasp the information (call setting information) on the resources that each base station device has allocated to the communication terminal. Then, each antenna power of the base station device output from the antenna power measurement unit 304 and the process switching determination unit 3
02 comprehensively determines whether to accept a call when a failure occurs in the base station device, based on the content of switching the processing system of the base station device determined by 02 and the call setting information notified from the call setting information receiving unit 305. Then, the determination content is output to the call admission control unit 307.

The call admission control unit 307 controls whether to accept the call or not to accept the call based on the determination content output from the call setting information management unit 306.

Next, the operation of the base station apparatus having the above configuration will be described. Usually, the base station device is the same as the first embodiment.
The communication service is carried out using the transmission diversity function in the same manner as the above, but the antenna A related to the transmission diversity function is used.
A signal processing unit 102 for antenna A, spread / modulation unit 103, transmission power amplification unit 104, antenna A1
05 or a failure occurs in the antenna B signal processing unit 106, the spreading / modulation unit 107, the transmission power amplification unit 108, and the antenna B 109, which is the processing system for the antenna B, the failure detection unit 201 detects the failure, After specifying which of the processing system for the antenna A and the processing system for the antenna B has a failure, the failure notification unit 202 is notified. Then, according to the failure content notified from the failure notification unit 202 to the base station device control application or the wireless network control switch application,
The base station device control application or the wireless network control exchange application determines the switching processing content.

This is because the setting environment of a part of the base station device is changed due to a decrease in user capacity as compared with the case where the transmission diversity is performed, so that the call setting control and the like are comprehensively judged. It is assumed that the transmission diversity function is stopped via the base station device control application or the wireless network control switch application.

The determined switching process contents are received by the process switching receiving unit 203 and notified to the process switching setting unit 204. The processing switching setting unit 204 switches the processing content so that the function of the processing system in which the failure has occurred is stopped and the transmission processing that does not apply the transmission diversity is performed using the remaining processing system.

Next, the operation of the host controller will be described with reference to the flowchart of FIG. The base station device assumed in FIG. 4 is one of the base station devices connected to the upper control device. In step (hereinafter, abbreviated as “ST”) 401, the antenna power of the base station device connected to the upper control device is measured.

In ST402, fault information indicating whether a fault is detected is received from the base station device.

In ST403, the presence / absence of a fault is determined from the fault information received in ST402. If a fault is detected, the process proceeds to ST404, and if no fault is detected, the process proceeds to ST406.

In ST404, the power of the antenna in which a failure is detected is set to "0". That is, it is decided to stop the processing system in which the failure is detected.

In ST405, the contents decided in ST404 are notified to the corresponding base station apparatus.

In ST406, the magnitude comparison between the antenna power values measured in ST403 and the upper limit power value per antenna is performed for each antenna. This is to determine whether the transmission power per antenna exceeds the upper limit power value specified by the Radio Law, etc., when a new call is accepted in a wireless communication system in which the transmission power increases as the number of calls increases. is there. When the measured antenna power value is equal to or higher than the upper limit power value per antenna, the operation proceeds to ST409, and when the measured antenna power value is smaller than the upper limit power value per antenna, the operation proceeds to ST407.

At ST407, the antenna power of the base station apparatus is added. At this time, it goes without saying that, in ST404, the antenna in which the failure has occurred in the base station apparatus sets the antenna power to "0".

In ST408, the antenna power value of the base station apparatus added in ST407 and the upper limit power value per sector are compared in magnitude. This is to determine whether the transmission power per sector exceeds the upper limit power value specified by the Radio Law etc. when a new call is accepted in a wireless communication system in which the transmission power increases as the number of calls increases. is there. When the added antenna power value is equal to or higher than the upper limit power value per sector, the operation proceeds to ST409, and when the added antenna power value is smaller than the upper limit power value per sector, the operation proceeds to ST410.

In ST409, control for not accepting the call is performed, and in ST410, control for accepting the call is performed.

As described above, according to the embodiment of the present invention, in the base station apparatus having the transmission diversity function, when a failure related to the transmission diversity function occurs, the content of the failure is given to the base station apparatus control application or the wireless network. The call admission control can be comprehensively determined by managing it with the control switching application.

(Embodiment 3) FIG.5 is a block diagram showing a configuration of a base station apparatus according to Embodiment 3 of the present invention. 5, parts common to those in FIG. 1 are designated by the same reference numerals as those in FIG. 1, and detailed description thereof will be omitted.

The processing switching setting unit 501 switches the processing contents so that the function of the processing system in which the failure has occurred is stopped and the transmission processing not applying the transmission diversity is performed using the other processing system. The switched contents are output to the process switching data creation unit 502.

The process switching data creation unit 502 switches to the transmission process to which the transmission diversity is not applied due to the switching of the process contents of the communication terminal device, that is, the occurrence of a failure according to the contents set by the process switching setting unit 501. Create data to notify that.

Next, the operation of the base station apparatus having the above configuration will be explained. Usually, the base station device is the same as the first embodiment.
Similarly, the communication service is performed using the transmission diversity function, but the signal processing unit 102 for the antenna A, which is the processing system for the transmission antenna A related to the transmission diversity function,
When a failure occurs in the spreading / modulating unit 103, the transmission power amplification unit 104, the antenna A 105 or the antenna B signal processing unit 106 that is the processing system for the antenna B, the spreading / modulation unit 107, the transmission power amplification unit 108, and the antenna B 109 The failure detection unit 110 detects the failure and identifies which of the processing system for the antenna A and the processing system for the antenna B has the failure. Then, the processing switching setting unit 501 switches the processing content so that the function of the processing system in which the failure has occurred is stopped and the transmission processing that does not apply the transmission diversity is performed using the remaining one processing system. In addition, according to the processing content set by the processing switching setting module 501, the processing switching data creation module 502 switches the processing content to the communication terminal device, that is, the transmission processing in which the transmission diversity is not applied due to the occurrence of a failure. Transmission data for notifying switching is created and notified to the communication terminal device.

Upon receiving the process switching data, the communication terminal device stops the transmission diversity function and establishes a wireless connection for normal transmission.

In the first to third embodiments described above,
The processing system refers to the antenna A signal processing unit 102, the spreading / modulation unit 103, the transmission power amplification unit 104, and the antenna A 105 for the antenna A. Regarding the antenna B, the signal processing unit 106 for the antenna B and the spreading / modulating unit 10 are provided.
7, the transmission power amplifier 108, and the antenna B109.
Here, the spreading / modulating unit 103 or the spreading / modulating unit 107
May not spread.

As described above, according to the embodiment of the present invention, in the base station apparatus having the transmission diversity function, even when a failure related to the transmission diversity function occurs, the function of the processing system in which the failure occurs is stopped. , The communication service can be continued by performing a normal transmission process that does not perform transmission diversity using the other processing system, and notifies the communication terminal device of the processing content for the failure to stop the transmission diversity function. ,
By stopping the transmission diversity function of the communication terminal device as well, the power consumption of the communication terminal device can be suppressed.
Further, although there is a possibility that a noise signal may be received if reception processing is performed even though the base station apparatus does not transmit a signal that has been subjected to transmission diversity processing, this can be avoided.

[0068]

As described above, according to the present invention, in a base station apparatus having a transmission diversity function, even when a failure related to the transmission diversity function occurs, the function of the processing system in which the failure has occurred is stopped and the remaining one The communication service can be continued by performing the transmission process that does not apply the transmission diversity by using the processing system.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a base station apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a block diagram showing the configuration of a base station apparatus according to Embodiment 2 of the present invention.

FIG. 3 is a block diagram showing a configuration of a host controller according to Embodiment 2 of the present invention.

FIG. 4 is a flowchart showing the operation of the host controller according to the second embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a base station apparatus according to Embodiment 3 of the present invention.

FIG. 6 is a block diagram showing a configuration of a conventional wireless communication system having a transmission diversity function.

[Explanation of symbols]

101 encoding unit 102 Signal processing unit for antenna A 103, 107 Spreading / modulating unit 104, 108 transmission power amplifier 105 Antenna A 106 Signal processing unit for antenna B 109 Antenna B 110, 201 Failure detection unit 111, 204, 501 process switching setting unit 202 Fault notification section 203 Process switching receiver 301 Fault information receiver 302 Process switching determination unit 303 Process switching notification unit 304 Antenna power measurement unit 305 Call setting information receiver 306 Call setting information management unit 307 Call admission control unit 502 Process switching data creation unit

Claims (9)

[Claims] 1. A wireless communication apparatus configured to perform transmission diversity by transmitting signals from a plurality of antennas, which forms signals to be transmitted from the plurality of antennas, and which corresponds to the plurality of antennas. A plurality of transmission signal forming means provided, a failure detecting means for detecting a failure which is an abnormal state in which normal transmission diversity function cannot be exerted, and which specifies the transmission signal forming means in which the failure is detected, A wireless communication apparatus comprising: a process switching setting unit that stops the function of the transmission signal forming unit in which a failure is detected. 2. The process switching setting means, in addition to stopping the function of the transmission signal forming means in which a failure is detected, changes the processing of the transmission signal forming means which is not stopped. The wireless communication device described. 3. When the processing switching setting means detects a failure related to the transmission diversity function, the processing switching setting means sets the transmission power of the transmission signal formed by the transmission signal forming means in which no failure is detected to be higher than that when the transmission diversity is applied. The wireless communication device according to claim 2. 4. A failure information receiving unit which is connected to a plurality of wireless communication devices and administers the plurality of wireless communication devices and which receives from the wireless communication devices information indicating a failure related to a transmission diversity function. And a call setting information management unit that manages a call based on information indicating a failure related to a transmission diversity function from the wireless communication device. 5. When the failure information receiving means receives information indicating a failure related to the transmission diversity function of the wireless communication device, the call setting information management means causes the failure information of each wireless communication device and the call setting of each wireless communication device. The host control device according to claim 4, wherein whether or not to accept the call is comprehensively determined based on the information and / or the antenna power value of each wireless communication device. 6. When a failure related to the transmission diversity function is detected, a failure notification means is provided for notifying the partner wireless station device that the function of the transmission signal forming means in which the failure is detected is stopped. The wireless communication device according to claim 3. 7. A radio station apparatus, which receives the notification according to claim 6 and stops the transmission diversity function. 8. A wireless communication method adapted to perform transmission diversity by transmitting signals from a plurality of antennas, wherein a signal to be transmitted from each of the plurality of antennas is formed by a plurality of processing systems, and the processing is performed. Detecting whether or not there is an abnormal state in which one of the systems cannot exhibit the normal transmission diversity function, and the function of the processing system in which the failure is detected is stopped, and the processing system is not stopped. The wireless communication method is characterized in that the transmission power of the transmission signal formed by the processing system in which no failure is detected is changed to be higher than that when transmission diversity is applied. 9. A communication system comprising a plurality of base station devices and a host controller for controlling them, each base station device forming a signal to be transmitted from a plurality of antennas and corresponding to the plurality of antennas. A plurality of transmission signal forming means provided as a unit and a failure notifying means for notifying the host controller of information indicating the detected transmission signal forming means when a failure related to the transmission diversity function is detected, and the functions of the transmission signal forming means Receiving means for receiving information for stopping the transmission from the upper control device, and processing switching setting means for stopping the function of the transmission signal forming means in which a failure is detected according to the information received by the processing switching receiving means. The upper control device is provided with a failure information receiving unit that receives information indicating a failure related to a transmission diversity function from a wireless communication apparatus, and the failure information receiving unit. When the means receives information indicating a failure related to the transmission diversity function of the wireless communication device, a process switching determination means that determines to stop the function of the transmission signal forming means of the wireless communication device in which the failure is detected, A process switching notifying unit that notifies the wireless communication device of the content determined by the process switching determining unit.