CN103763075B - Wireless communication system and method - Google Patents

Abstract

The invention provides a wireless communication system and method. A wireless base station can correctly receive data from a mobile station. An error detection coding processing part (1a) of the wireless base station (1) conducts error detection coding processing with data comprising first control data required for receiving downlink signals and second control data required for sending uplink signals being the unit. A sending part (1b) sends the data on which error detection coding processing is conducted by the error detection coding processing part (1a) to the mobile station (2).

Description

Wireless communication system and wireless communication method

This application is a divisional application of the original patent application No. 200780100011.5 (international application number: PCT/JP2007/065786, filing date: August 10, 2007, invention name: wireless base station and mobile station).

technical field

The present invention relates to a radio base station and a mobile station, and more particularly to a radio base station and a mobile station that transmit and receive information indicating an error detection result of downlink data.

Background technique

When the wireless base station sends downlink data, it sends downlink scheduling information such as wireless resource allocation information and transmission format for sending downlink data in a downlink control channel (PDCCH: Physical Downlink Control Channel, physical downlink control channel) to the destination of the downlink data. ground mobile station. Then, the wireless base station performs coding, modulation, mapping to radio resources, etc. of downlink data according to the specified downlink scheduling information, and transmits on a downlink data channel (PSDCH: Physical Downlink Shared Channel, Physical Downlink Shared Channel). The mobile station detects whether there is a PDCCH sent to itself from multiple PDCCHs (candidates). When detecting the PDCCH sent to itself, the mobile station decodes the PDCCH, receives the PDSCH and receives downlink data according to the downlink scheduling information contained therein.

FIG. 26 is a diagram showing PDCCH and PDSCH. A subframe of 1 ms is shown in the figure. The vertical direction of the graph represents frequency, and the horizontal direction represents time.

As shown, a control channel (PDCCH) i, j, k and a data channel (PDSCH) i, j, k are allocated in frequency domain and time domain. Here, it is assumed that the control channel to be transmitted to a certain mobile station is control channel j. In this case, a certain mobile station receives the control channel j addressed to itself, and receives the data of the data channel j based on the received control channel j.

The mobile station detects the PDCCH sent to itself and receives downlink data. Then, the mobile station performs downlink data error detection. If the mobile station does not detect an error in the downlink data, it returns an ACK (ACKnowledgment, positive confirmation) to the wireless base station, and if an error is detected, it sends a NACK (Negative ACK, negative confirmation) to the wireless base station. The radio base station transmits the next data when receiving ACK, and retransmits the previously transmitted data when receiving NACK.

FIG. 27 is a diagram illustrating transmission of downlink data and a response thereto. In the figure, downlink data transmitted from the radio base station to the mobile station and ACK/NACK transmitted from the mobile station to the radio base station are shown.

As shown in the figure, a wireless base station transmits downlink data to a mobile station. The mobile station performs error detection on the received downlink data, and if no error is detected, it sends ACK to the wireless base station. On the other hand, when an error is detected in the received data, a NACK is sent to the radio base station as shown in the figure. At this time, as shown in the figure, the radio base station retransmits the previously transmitted downlink data.

When the mobile station sends uplink data, the radio base station sends uplink radio resource allocation information (UL allocation grant, uplink allocation grant) for sending uplink data to the mobile station to send uplink data in the PDCCH. The mobile station transmits uplink data using radio resources specified by the radio base station. When the mobile station transmits uplink data, if there is ACK/NACK for downlink data reception, it uses a part of radio resources allocated for uplink data transmission, multiplexes with uplink data, and then transmits.

FIG. 28 is a diagram showing uplink radio resource allocation information and uplink data corresponding thereto. The figure shows the uplink radio resource allocation information sent by the wireless base station to the mobile station, and the uplink data sent by the mobile station to the base station.

The radio base station transmits the uplink radio resource allocation information shown in the figure to the mobile station in the PDCCH. The mobile station transmits uplink data based on the uplink radio resource allocation information from the radio base station.

There are two methods of transmitting ACK/NACK information for downlink data: when the mobile station transmits uplink data and when it does not transmit uplink data. First, a case where uplink data is not transmitted will be described.

FIG. 29 is a diagram illustrating an ACK/NACK transmission method when no uplink data is transmitted. In the figure, an uplink control channel (PUCCH: Physical Uplink Control Channel, Physical Uplink Control Channel) transmitted from a mobile station to a radio base station is shown. In the case of not sending uplink data, the mobile station sends ACK/NACK in the pre-allocated (or associated with the radio resource for sending downlink data) PUCCH. In addition, as shown in the figure, changing the frequencies of PUCCHi and PUCCHj in units of slots (0.5 ms) is to obtain a frequency diversity effect.

Next, a case where uplink data is transmitted will be described.

FIG. 30 is a diagram illustrating an ACK/NACK transmission method when transmitting uplink data. In the figure, an uplink data channel (PUSCH: Physical Uplink Shared Channel, physical uplink shared channel) allocated by PDCCH (UL allocation grant on PDCCH) is shown.

When there is a PUSCH, as shown in the figure, the mobile station time-division-multiplexes ACK/NACK and uplink data, and then transmits it to the radio base station (for example, refer to Non-Patent Document 1).

Non-Patent Document 1: R1-073128, "HARQ symbol to RE mapping", 3GPP TSG RANWG1Meeting#49bis, Orlando, FL, USA, June25-29, 2007

However, in the above-mentioned ACK/NACK transmission method, there is a problem that there is a discrepancy between the uplink data format expected by the radio base station and the uplink data format actually transmitted by the mobile station, and the radio base station cannot correctly The case of receiving uplink data.

Fig. 31 is a diagram (part 1) for explaining format inconsistency. The figure shows downlink scheduling information 301 , uplink radio resource allocation information 302 , and downlink data 303 transmitted from a radio base station to a mobile station. Also, uplink data 304 transmitted from the mobile station to the radio base station is shown. Error correction coding is performed on the downlink scheduling information 301 and the uplink radio resource allocation information 302 respectively.

In FIG. 31 , it is assumed that the mobile station fails to detect the downlink scheduling information 301 and succeeds in detecting the uplink radio resource allocation information 302 . In this case, since the detection of the downlink scheduling information 301 fails, the mobile station does not perform the process of receiving the downlink data 303 . On the other hand, since the detection of uplink radio resource allocation information 302 was successful, the mobile station transmits uplink data 304 to the radio base station as shown in the figure.

Since the mobile station does not perform reception processing of the downlink data 303, it does not perform error detection of the downlink data 303. Therefore, the mobile station does not multiplex ACK/NACK with the uplink data 304 as shown in the figure, and transmits only the uplink data 304 to the radio base station.

Fig. 32 is a diagram (part 2) explaining format inconsistency. In FIG. 32 , the same reference numerals are attached to the same contents as those in FIG. 31 , and description thereof will be omitted.

In FIG. 32 , it is assumed that the mobile station successfully detects the downlink scheduling information 301 and the uplink radio resource allocation information 302 . In this case, since the mobile station receives downlink data 303, it performs error detection on downlink data 303, multiplexes ACK/NACK 305 and uplink data 304, and transmits it to the radio base station.

As shown in the uplink data 304 in FIG. 31 and the uplink data 304 and ACK/NACK 305 in FIG. 32 , when the ACK/NACK and uplink data are multiplexed and sent to the wireless base station, the PUSCH transmission format predicted by the wireless base station is different from the actual transmission format of the mobile station. Inconsistency occurs between PUSCH transport formats for transmission.

That is, when the downlink data is transmitted from the wireless base station, if the mobile station fails to detect the downlink scheduling information but succeeds in detecting the uplink radio resource allocation information, then only the uplink data must be sent after multiplexing ACK/NACK. data, the uplink data cannot be received correctly in the wireless base station.

Contents of the invention

The present invention has been made in view of this point, and an object of the present invention is to provide a radio base station and a mobile station capable of correctly receiving uplink data at the radio base station.

In the present invention, in order to solve the above-mentioned problems, a wireless base station 1 shown in FIG. The station 2 is characterized in that the radio base station 1 includes: an error detection coding processing unit 1a that performs error detection coding processing in units of data including both first control data and second control data; and a transmission unit 1b that The data subjected to the error detection coding processing by the error detection coding processing unit 1 a is transmitted to the mobile station 2 .

According to such a radio base station 1 , data including both the first control data and the second control data is subjected to error detection encoding processing and transmitted to the mobile station 2 .

In addition, in order to solve the above problems, the present invention provides a mobile station that receives first control data necessary for receiving downlink signals and second control data necessary for transmitting uplink signals from a radio base station. The data is characterized in that the mobile station has: a receiving unit that receives, from the radio base station, data that has undergone error detection coding processing in units of data including both the first control data and the second control data. an error detection decoding processing unit that performs error detection decoding processing on the data received by the receiving unit; and a separation unit that separates the data that has been error detection decoding processed by the error detection decoding processing unit into the first control data and the second control data.

According to such a mobile station, data that has been subjected to error detection encoding processing in units of data including both first control data and second control data is received, and error detection decoding processing is performed. Then, the first control data and the second control data after the error detection decoding process are separated.

In addition, in order to solve the above-mentioned problems, the present invention provides a radio base station that transmits to a mobile station first control data necessary for receiving downlink signals and second control data necessary for transmitting uplink signals. The radio base station is characterized in that it includes: an error detection coding processing unit that performs error detection coding processing on the first control data and the second control data respectively; multiplexing the first control data and the second control data subjected to the error detection encoding process; Both the data and the second control data are subjected to error correction encoding processing in units of data; and a transmission unit that transmits the data subjected to error correction encoding processing by the error correction encoding processing unit.

According to such a wireless base station, the error detection coding process is performed on the first control data and the second control data respectively, and the error correction coding process is performed in units of data including both the first control data and the second control data after the error detection coding process. .

In addition, in order to solve the above problems, the present invention provides a mobile station that receives first control data necessary for receiving downlink signals and second control data necessary for transmitting uplink signals from a radio base station. The data, wherein the mobile station includes: a receiving unit configured to receive, from the wireless base station, data subjected to error correction coding processing in units of data including both the first control data and the second control data; an error correction decoding processing unit that performs error correction decoding processing on the data received by the receiving unit; a separation unit that separates the data that has been subjected to error correction decoding processing by the error correction decoding processing unit into error detection coded, the first control data and the second control data; and an error detection decoding processing unit that separates the error detection encoded first control data and the second control data by the separating unit, respectively. Perform error detection decoding processing.

According to such a mobile station, data that has been subjected to error correction encoding processing in units of data including both first control data and second control data is received, and error correction decoding processing is performed. Then, the first control data and the second control data after the error correction decoding processing are separated, and the error detection decoding processing is performed on them respectively.

In addition, in order to solve the above-mentioned problems, the present invention provides a mobile station for wireless communication with a wireless base station, characterized in that the mobile station includes: an information generating unit that generates an error detection signal indicating a received downlink signal; the resulting information; and an information area securing unit for securing an area for transmitting the information to the radio base station in an uplink data channel regardless of whether the downlink signal is received.

According to such a mobile station, an area for transmitting information indicating an error detection result of a downlink signal to a radio base station is always reserved on the uplink data channel regardless of whether downlink data is received.

In addition, in order to solve the above-mentioned problems, the present invention provides a mobile station for wireless communication with a wireless base station, characterized in that the mobile station includes: an information generating unit that generates an error detection signal indicating a received downlink signal; result information; an information area securing unit that secures an area for transmitting the information to the wireless base station in an uplink data channel according to whether the downlink signal is received; Area information indicating whether or not the area is secured by the information area securing unit is assigned to the channel.

According to such a mobile station, according to whether or not downlink data is received, an area for transmitting information indicating the error detection result of the downlink signal to the radio base station is reserved on the uplink data channel, and an area indicating whether the area is reserved is assigned to the uplink data channel. information.

In addition, in order to solve the above-mentioned problems, the present invention provides a wireless base station for performing wireless communication with a mobile station, characterized in that the wireless base station includes: a control information acquisition unit that acquires control information indicating the presence or absence of information indicating the result of error detection of the downlink signal by the mobile station contained in the uplink data channel; the above information.

According to such a wireless base station, control information is obtained, and based on the obtained control information, information is obtained from an uplink data channel, and the control information indicates whether information indicating the result of error detection of a mobile station on a downlink signal is included in the uplink data channel. .

In addition, in order to solve the above problems, the present invention provides a wireless base station for performing wireless communication with a mobile station, characterized in that the wireless base station includes: a reception processing unit that, based on the first transmission format and the second transmission format, An uplink data channel reception process is performed, the first transmission format secures a region including information indicating the error detection result of the downlink signal by the mobile station, and the second transmission format does not secure a region including the information.

According to such a radio base station, an uplink data channel reception process is performed based on a first transmission format that secures an area including information indicating a result of error detection of a downlink signal by a mobile station, and a second transmission format that includes 2 The transmission format does not ensure the area containing the information.

In addition, in order to solve the above-mentioned problems, the present invention provides a mobile station for wireless communication with a wireless base station, characterized in that the mobile station includes: an information generating unit that generates an error detection signal indicating a received downlink signal; result information; and a transmitting unit that transmits the information on an uplink control channel and transmits an uplink signal on an uplink data channel.

According to such a mobile station, the information indicating the error detection result of the downlink signal is transmitted on the uplink control channel, and the uplink signal is transmitted on the uplink data channel.

And, in the present invention, in order to solve the above-mentioned problems, a radio base station for wireless communication with a mobile station is provided, characterized in that the radio base station has: an information receiving unit that receives a message indicating the mobile station in an uplink control channel; information on the error detection result of the downlink signal by the station; and an uplink signal receiving unit that receives the uplink signal from the mobile station in the uplink data channel.

According to such a radio base station, information indicating an error detection result of a downlink signal is received on an uplink control channel, and an uplink signal is received on an uplink data channel.

The effect of the invention

In the radio base station and mobile station of the present invention, the radio base station can correctly receive data from the mobile station.

The above and other objects, features, and advantages of the present invention will become more apparent from the following description in connection with the accompanying drawings showing preferred embodiments as examples of the present invention.

Description of drawings

FIG. 1 is a diagram showing an overview of a radio base station.

FIG. 2 is a diagram showing a configuration example of a wireless system according to the first embodiment.

FIG. 3 is a diagram showing operations of a radio base station and a mobile station when PDCCH detection is successful.

FIG. 4 is a diagram showing operations of a radio base station and a mobile station when PDCCH detection fails.

FIG. 5 is a diagram illustrating encoding of downlink scheduling information and uplink radio resource allocation information.

Fig. 6 is a functional block diagram of a radio base station.

Fig. 7 is a functional block diagram of a mobile station.

FIG. 8 is a diagram illustrating encoding of downlink scheduling information and uplink radio resource allocation information according to the second embodiment.

Fig. 9 is a functional block diagram of a radio base station.

Fig. 10 is a functional block diagram of a mobile station.

FIG. 11 is a diagram illustrating encoding of downlink scheduling information and uplink radio resource allocation information according to the third embodiment.

Fig. 12 is a functional block diagram of a radio base station.

Fig. 13 is a functional block diagram of a mobile station.

Fig. 14 is a diagram showing operations of a radio base station and a mobile station according to the fourth embodiment.

Fig. 15 is a functional block diagram of a wireless base station.

Fig. 16 is a functional block diagram of a mobile station.

Fig. 17 is a diagram showing operations of a radio base station and a mobile station according to the fifth embodiment.

Fig. 18 is a functional block diagram of a radio base station.

Fig. 19 is a functional block diagram of a mobile station.

FIG. 20 is a diagram showing operations of a radio base station and a mobile station according to the sixth embodiment.

Fig. 21 is a functional block diagram of a radio base station.

Fig. 22 is a functional block diagram of a mobile station.

Fig. 23 is a diagram showing operations of a radio base station and a mobile station according to the seventh embodiment.

Fig. 24 is a functional block diagram of a radio base station.

Fig. 25 is a functional block diagram of a mobile station.

FIG. 26 is a diagram showing PDCCH and PDSCH.

FIG. 27 is a diagram illustrating transmission of downlink data and a response thereto.

FIG. 28 is a diagram showing uplink radio resource allocation information and uplink data corresponding thereto.

FIG. 29 is a diagram illustrating an ACK/NACK transmission method when no uplink data is transmitted.

FIG. 30 is a diagram illustrating an ACK/NACK transmission method when transmitting uplink data.

Fig. 31 is a diagram (part 1) for explaining format inconsistency.

Fig. 32 is a diagram (part 2) explaining format inconsistency.

Label description

1 wireless base station

1a error detection coding processing unit

1b sending department

2 mobile stations

detailed description

Next, with reference to the accompanying drawings, the principle of the present invention will be described in detail.

FIG. 1 is a diagram showing an overview of a radio base station. As shown in the figure, the radio base station 1 has an error detection coding processing unit 1a and a transmission unit 1b. The radio base station 1 transmits to the mobile station 2 first control data necessary for the mobile station 2 to receive downlink signals and second control data necessary for the mobile station 2 to transmit uplink data. The first control data is, for example, downlink scheduling information transmitted on the PDCCH, and the second control data is, for example, uplink radio resource allocation information transmitted on the PDCCH.

The error detection coding processing unit 1a performs error detection coding processing in units of data including both the first control data and the second control data. That is, the error detection coding processing unit 1 a does not perform error detection coding processing on the first control data and the second control data individually, but performs error detection coding processing collectively.

The transmission unit 1b transmits to the mobile station 2 the first control data and the second control data after the error detection coding processing by the error detection coding processing unit 1a.

In this manner, the radio base station 1 performs error detection coding processing in units of data including both the first control data and the second control data. Therefore, the mobile station 2 does not perform an error detection on only one of the first control data and the second control data, so that only one control data is successfully received. For example, if the first control data has an error, the mobile station will fail to detect the second control data because the mobile station performs error detection on both the first control data and the second control data as a whole.

This prevents the mobile station 2 from failing to receive the first control data but successfully receiving the second control data and transmitting an uplink signal to the radio base station 1 based on the second control data. That is, the mobile station 2 transmits the uplink signal including the error detection result of the downlink signal after successfully receiving both the first control data and the second control data, so that the format of the data received by the wireless base station 1 does not match. . Therefore, the radio base station 1 can correctly receive uplink signals.

Next, a first embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 2 is a diagram showing a configuration example of a wireless system according to the first embodiment. The figure shows a radio base station 11 and a mobile station 12 . A wireless base station 11 and a mobile station 12 shown in the figure perform wireless communication based on, for example, LTE (Long Term Evolution, Long Term Evolution).

The radio base station 11 encodes both downlink scheduling information and uplink radio resource allocation information, and transmits them on the PDCCH.

The mobile station 12 detects the PDCCH transmitted to itself. When the PDCCH sent to itself is successfully detected and the detected PDCCH includes downlink scheduling information and uplink radio resource allocation information, the mobile station 12 performs reception processing of downlink data and performs error detection on the downlink data. Then, in the PUSCH based on the uplink radio resource allocation information, the uplink data and the ACK/NACK corresponding to the error detection result of the downlink data are multiplexed and transmitted. On the other hand, when the downlink PDCCH sent to itself fails to be detected, the mobile station 12 does not send any information in the PUSCH.

The downlink scheduling information and the uplink radio resource allocation information are coded together and sent to the mobile station. Therefore, it does not happen that the mobile station 12 successfully detects one message but fails to detect another message. That is, the mobile station 12 does not transmit only the uplink data 304 to the radio base station 11 as shown in FIG.

FIG. 3 is a diagram showing operations of a radio base station and a mobile station when PDCCH detection is successful. The figure shows control information 21 and downlink data 22 . In addition, uplink data 23 and ACK/NACK 24 time-multiplexed with the uplink data are shown.

The control information 21 is information obtained by encoding both downlink scheduling information and uplink radio resource allocation information. The radio base station 11 transmits this control information 21 on the PDCCH. In addition, the radio base station 11 transmits downlink data 22 on the PDSCH.

The mobile station 12 successfully detects the control information 21 and receives the downlink data 22 according to the downlink scheduling information of the control information 21 . The mobile station 12 performs error detection on the received downlink data 22 . Also, the mobile station 12 transmits uplink data 23 to the radio base station 11 based on the uplink radio resource allocation information. The mobile station 12 multiplexes the ACK/NACK 24 which is the error detection result of the downlink data 22 with the uplink data 23 and transmits the result to the radio base station 11 .

FIG. 4 is a diagram showing operations of a radio base station and a mobile station when PDCCH detection fails. In FIG. 4 , the same reference numerals are assigned to the same contents as those in FIG. 3 , and description thereof will be omitted.

The radio base station 11 transmits control information 21 obtained by encoding downlink scheduling information and uplink radio resource allocation information in a PDCCH. In addition, the radio base station 11 transmits downlink data 22 on the PDSCH.

Assume that the mobile station 12 fails to detect the control information 21 including downlink scheduling information and uplink radio resource allocation information. In this case, the mobile station 12 cannot detect the downlink scheduling information, and therefore does not perform the reception process of the downlink data 22 . In addition, uplink resource allocation information cannot be detected, and thus uplink data transmission processing is not performed.

Although the radio base station 11 transmits the downlink data 22 in the PDSCH, nothing is received from the mobile station 12 . Therefore, the radio base station 11 detects DTX indicating that no ACK/NACK signal is transmitted. When DTX is detected, as shown in the control information 25 and the downlink data 26 in the figure, the wireless base station 11 retransmits the previously transmitted downlink data 22 to the mobile station 12 .

When retransmitted data is detected, the mobile station 12 transmits uplink data 23 and ACK/NACK 24 to the radio base station 11 in the same manner as described in FIG. 3 .

In FIG. 31 and FIG. 32 , downlink scheduling information 301 and uplink radio resource allocation information 302 are encoded separately. Therefore, only one of the downlink scheduling information 301 and the uplink radio resource allocation information 302 included in the PDCCH fails to be detected, while the other is successfully detected. As a result, inconsistency occurs between the transmission format of the radio base station and the transmission format of the mobile station.

On the other hand, as shown in FIGS. 3 and 4 , the radio base station 11 in FIG. 2 encodes downlink scheduling information and uplink radio resource allocation information together. Therefore, at the mobile station 12, there will not be a phenomenon that only one piece of information fails to be detected, while the other information is detected successfully. upstream data.

That is, the mobile station 12 in FIG. 2 does not send uplink data of different formats, that is, uplink data after ACK/NACK multiplexing and uplink data without ACK/NACK multiplexing, but always sends ACK/NACK NACK the multiplexed uplink data, or do not send any data. Accordingly, the format from the mobile station 12 is unified, and the radio base station 11 can receive data from the mobile station 12 correctly.

FIG. 5 is a diagram illustrating encoding of downlink scheduling information and uplink radio resource allocation information. The figure shows downlink scheduling information 31 and uplink radio resource allocation information 32 .

As shown in the figure, the radio base station 11 performs error detection coding on the downlink scheduling information 31 and the uplink radio resource allocation information 32 together (as one piece of data). For example, CRC (Cyclic Redundancy Check, Cyclic Redundancy Check) encoding is performed. The wireless base station 11 also performs error correction coding (FEC: Forward Error Correction, forward error correction). For example, turbo encoding or convolutional encoding.

In this way, the radio base station 11 collectively performs error detection coding on the downlink scheduling information 31 and the uplink radio resource allocation information 32 . As a result, the mobile station 12 does not erroneously detect only one message. That is, when one of the downlink scheduling information 31 and the uplink radio resource allocation information 32 has an error, the mobile station 12 will detect that both the downlink scheduling information 31 and the uplink radio resource allocation information 32 have errors.

Fig. 6 is a functional block diagram of a radio base station. As shown in the figure, the radio base station 11 has a control unit 41 and a data processing unit 42 . The control unit 41 controls the data processing performed by the data processing unit 42 .

The downlink data control data generator 42a of the data processing unit 42 generates downlink scheduling information.

The uplink data control data generation unit 42b generates uplink radio resource allocation information.

The multiplexing unit 42c time-multiplexes the downlink scheduling information generated by the downlink data control data generation unit 42a and the uplink radio resource allocation information generated by the uplink data control data generation unit 42b.

The error detection coding unit 42d performs error detection coding on the multiplexed downlink scheduling information and uplink radio resource allocation information together. For example, CRC encoding.

The error correction coding unit 42e performs error correction coding on the downlink scheduling information and the uplink radio resource allocation information subjected to the error detection coding. For example, turbo encoding or convolutional encoding.

The downlink data generation unit 42f generates downlink data to be transmitted to the mobile station 12 .

The error detection coding unit 42g performs error detection coding on the downlink data. For example, CRC encoding.

The error correction coding unit 42h performs error correction coding on the downlink data. For example, Turbo coding or convolutional coding.

The transmission signal processing unit 42i performs signal processing on a signal to be transmitted to the mobile station 12 . For example, modulation or resource mapping is performed on encoded downlink scheduling information and uplink radio resource allocation information. In addition, modulation or resource mapping is performed on the coded downlink data.

The transceiver unit 42j wirelessly transmits the signal output from the transmission signal processing unit 42i to the mobile station 12 via an antenna. Also, the transceiver unit 42j receives a signal wirelessly transmitted from the mobile station 12, and outputs it to the received signal processing unit 42k.

The reception signal processing unit 42k performs demodulation, resource demapping, and the like on the wireless signal received by the transmission and reception unit 42j.

The decoding unit 42l decodes the signal output from the reception signal processing unit 42k, and decodes the ACK/NACK signal.

The ACK/NACK determination unit 42m determines whether the signal decoded by the decoding unit 42 is ACK or NACK. When the ACK/NACK determination unit 42m determines that it is NACK, it controls the downlink data control data generation unit 42a and the downlink data generation unit 42f to retransmit the downlink data.

The error correction decoding unit 42n performs error correction decoding on the uplink data output from the reception signal processing unit 42k.

The error detection decoding unit 42o performs error detection decoding on the uplink data output from the error correction decoding unit 42n. When the error detection decoding unit 42o detects an error in the uplink data, it controls the uplink data control data generation unit 42b so that the mobile station 12 transmits the uplink data again.

The uplink data processing unit 42p performs predetermined processing on the uplink data output from the error detection decoding unit 42o.

Fig. 7 is a functional block diagram of a mobile station. As shown in the figure, the mobile station 12 has a control unit 51 and a data processing unit 52 . The control unit 51 controls the data processing performed by the data processing unit 52 .

The transmission and reception unit 52a of the data processing unit 52 receives a radio signal from the radio base station 11 via an antenna.

The reception signal processing unit 52b performs demodulation, resource demapping, and the like on the radio signal received by the transmission and reception unit 52a.

The error correction decoding unit 52c performs error correction decoding on the multiplexed downlink scheduling information and uplink radio resource allocation information signals output from the received signal processing unit 52b.

The error detection decoding unit 52d performs error detection decoding on the signal output from the error correction decoding unit 52c.

The separation unit 52e separates the multiplexed downlink scheduling information output from the error detection decoding unit 52d and the uplink radio resource allocation information. The separated downlink scheduling information is output to the downlink data control data processing unit 52f, and the uplink radio resource allocation information is output to the uplink data control data processing unit 52g.

The control data processing unit 52f for downlink data controls the received signal processing unit 52b based on the downlink scheduling information.

The uplink data control data processing unit 52g controls the uplink data generation unit 52m based on the uplink radio resource allocation information.

The error correction decoding unit 52h performs error correction decoding on the downlink data signal output from the reception signal processing unit 52b.

The error detection decoding unit 52i performs error detection decoding on the downlink data signal output from the error correction decoding unit 52h.

The downlink data processing unit 52j performs predetermined processing on the downlink data output from the error detection decoding unit 52i.

The ACK/NACK generation unit 52k generates ACK/NACK based on the error detection decoding performed on the downlink data by the error detection decoding unit 52i. When the error detection decoding unit 52i detects an error in the downlink data, it generates NACK, and when no error in the downlink data is detected, it generates ACK.

The encoding unit 52l encodes the ACK and NACK output from the ACK/NACK generating unit 52k.

The uplink data generation unit 52m generates uplink data to be transmitted to the radio base station 11 under the control of the uplink data control data processing unit 52g. For example, when the radio resource of the mobile station 12 is allocated in the uplink radio resource allocation information, uplink data to be transmitted to the radio base station 11 is generated.

The error detection coding unit 52n performs error detection coding on the uplink data generated by the uplink data generation unit 52m.

The error correction coding unit 52o performs error correction coding on the uplink data output from the error detection coding unit 52n.

The transmission signal processing unit 52p performs modulation, resource mapping, etc. on the ACK/NACK signal output from the encoding unit 52l and the uplink data output from the error correction encoding unit 52o.

In this way, the radio base station 11 encodes both downlink scheduling information and uplink radio resource allocation information. As a result, uplink data having a uniform format is transmitted from the mobile station 12, and the radio base station 11 can correctly receive the uplink data.

Next, a second embodiment of the present invention will be described in detail with reference to the drawings. In the first embodiment, the radio base station performs error detection coding on downlink scheduling information and uplink radio resource allocation information together, and then performs error correction coding. In the second embodiment, the radio base station performs error-correcting coding together after performing error detection coding on downlink scheduling information and uplink radio resource allocation information respectively.

FIG. 8 is a diagram illustrating encoding of downlink scheduling information and uplink radio resource allocation information in the second embodiment. The figure shows downlink scheduling information 61 and uplink radio resource allocation information 62 .

As shown in the figure, the radio base station performs error detection encoding on the downlink scheduling information 61 and the uplink radio resource allocation information 62 respectively. For example, CRC encoding.

In addition, the radio base station performs error correction coding on the downlink scheduling information 61 and uplink radio resource allocation information 62 after the error detection coding. For example, turbo encoding or convolutional encoding.

In this way, error detection coding is performed on the downlink scheduling information 61 and uplink radio resource allocation information 62 respectively, and then error correction coding is performed on them together, thereby reducing the situation that the mobile station performs error detection on only one information. That is, when the downlink scheduling information 61 and the uplink radio resource allocation information 62 cannot be correctly error-corrected and decoded, the mobile station detects that both the downlink scheduling information 61 and the uplink radio resource allocation information 62 have errors.

Thereby, it is possible to reduce the cases where the mobile station fails to detect the downlink scheduling information and successfully detects the uplink radio resource allocation information, but only transmits uplink data to the radio base station, and suppresses the inconsistency of uplink data formats in the radio base stations.

Fig. 9 is a functional block diagram of a radio base station. Each part of FIG. 9 has the same function as each part of the base station 11 shown in FIG. 6 . However, the wireless base station in FIG. 9 is different from the wireless base station in FIG. 6 in the encoding process. In the following, only the parts different from those in Fig. 6 will be described.

As opposed to the radio base station 11 in FIG. 6, in the radio base station in FIG. 9, the downlink scheduling information output from the downlink data control data generator 72a and the uplink data control data generator 72b and 72d in the radio base station in FIG. The uplink radio resource allocation information output by 72c is respectively subjected to error detection coding and multiplexed by the multiplexing unit 72e. Then, error correction coding is performed on the multiplexed downlink scheduling information and uplink radio resource allocation information together by the error correction coding unit 72f.

Fig. 10 is a functional block diagram of a mobile station. The components in FIG. 10 have the same functions as those in the mobile station 12 shown in FIG. 7 . However, the mobile station in FIG. 10 has a different decoding procedure than the mobile station in FIG. 7 . In the following, only the parts different from those in Fig. 7 will be described.

The signal received by the mobile station in FIG. 10 is obtained by performing error detection coding on the downlink scheduling information and uplink radio resource allocation information respectively, and then performing error correction coding together. Therefore, in contrast to the mobile station 12 in FIG. 7 , in the mobile station in FIG. 10 , the error correction decoding unit 82 c performs error correction decoding on the received downlink scheduling information and uplink radio resource allocation information.

In addition, the mobile station in FIG. 10 separates the error-corrected downlink scheduling information and uplink radio resource allocation information into downlink scheduling information and uplink radio resource allocation information, respectively, by the separation unit 82d. Then, error detection decoding is performed on the separated downlink scheduling information and uplink radio resource allocation information by the error detection decoding units 82e and 82g.

In this way, the radio base station performs error detection encoding on the downlink scheduling information and uplink radio resource allocation information respectively, and then performs error correction encoding together. Accordingly, uplink data of a uniform format can be transmitted from the mobile station, and thus the radio base station can correctly receive the uplink data.

Next, a third embodiment of the present invention will be described in detail with reference to the drawings. In contrast to the second embodiment, in the third embodiment, the downlink scheduling information and the uplink radio resource allocation information are respectively subjected to error detection coding, followed by interleaving, and then error correction coding is performed together.

FIG. 11 is a diagram illustrating encoding of downlink scheduling information and uplink radio resource allocation information according to the third embodiment. The figure shows downlink scheduling information 91 and uplink radio resource allocation information 92 .

As shown in the figure, the radio base station performs error detection coding on the downlink scheduling information 91 and the uplink radio resource allocation information 92 respectively. For example, CRC encoding. In addition, the radio base station interleaves the downlink scheduling information 91 and the uplink radio resource allocation information 92 after error detection coding. Then, the radio base station 11 collectively performs error correction coding on the interleaved downlink scheduling information 91 and uplink radio resource allocation information 92 . For example, turbo encoding or convolutional encoding.

In this way, the downlink scheduling information 91 and the uplink radio resource allocation information 92 are respectively subjected to error detection encoding and then interleaved together, and error correction encoding is performed on them together, thereby also reducing the risk of the mobile station performing error detection on only one information. Condition. That is, when the downlink scheduling information 91 and the uplink radio resource allocation information 92 cannot be corrected for error correction and decoding, the mobile station will detect errors in both the downlink scheduling information 91 and the uplink radio resource allocation information 92 .

Thus, it is possible to reduce the cases where the mobile station fails to detect the downlink scheduling information 91 and succeeds in detecting the uplink radio resource allocation information 92, and only transmits uplink data to the radio base station, and suppresses inconsistencies in uplink data formats in the base stations.

Fig. 12 is a functional block diagram of a radio base station. Each part of FIG. 12 has the same function as each part of the wireless base station shown in FIG. 9 . However, the radio base station in FIG. 12 is different from the radio base station in FIG. 9 in that interleaving is performed. In the following, only the parts different from those in Fig. 9 will be described.

As opposed to the wireless base station in FIG. 9, in the wireless base station in FIG. 12, after multiplexing the downlink scheduling information and uplink wireless resource allocation information after the error detection code is multiplexed by the multiplexing unit 102e, the multiplexed data are interleaved. Then, error correction coding is performed on the interleaved data by the error correction coding unit 102g.

Fig. 13 is a functional block diagram of a mobile station. The components in FIG. 13 have the same functions as those in the mobile station shown in FIG. 10 . However, the mobile station in FIG. 13 is different from the mobile station in FIG. 10 in that interleaving is performed. In the following, only the parts different from those in Fig. 10 will be described.

The signal received by the mobile station in FIG. 13 is obtained by performing error detection coding on the downlink scheduling information and uplink radio resource allocation information respectively, and then performing interleaving and error correction coding. Therefore, in contrast to the mobile station in FIG. 10 , in the mobile station in FIG. 13 , the deinterleaving unit 112d deinterleaves downlink scheduling information and uplink radio resource allocation information after error correction decoding by the error correction decoding unit 112c.

In addition, the mobile station in FIG. 13 separates the deinterleaved downlink scheduling information and uplink radio resource allocation information by the separating unit 112e. Then, error detection decoding is performed on the separated downlink scheduling information and uplink radio resource allocation information by the error detection decoding units 112f and 112h, respectively.

In this way, the radio base station performs interleaving after performing error detection coding on the downlink scheduling information and uplink radio resource allocation information respectively. Then, error correction coding is performed on the interleaved downlink scheduling information and uplink radio resource allocation information together. Accordingly, uplink signals having a uniform format can also be transmitted from the mobile station, so that the radio base station can correctly receive uplink data.

Next, a fourth embodiment of the present invention will be described in detail with reference to the drawings. In the fourth embodiment, the mobile station reserves an area for ACK/NACK in the PUSCH regardless of whether there is downlink data addressed to itself. Then, when the downlink data sent to itself is received, ACK or NACK is multiplexed into this area, and when the downlink data sent to itself is not received (when the downlink scheduling information sent to itself is not detected), in NACKs are sent in this area.

Fig. 14 is a diagram showing operations of a radio base station and a mobile station according to the fourth embodiment. The figure shows downlink scheduling information 121, 126, uplink radio resource allocation information 122, 127, and downlink data 123, 128. In addition, uplink data 124, 129 and ACK/NACK fields 125, 130 secured in the PUSCH are shown. Furthermore, downlink scheduling information 121, 126 and uplink radio resource allocation information 122, 127 are respectively subjected to error detection coding and error correction coding, and then transmitted to the mobile station.

Assume that the mobile station detects the downlink scheduling information 121 successfully. The mobile station receives downlink data 123 according to the downlink scheduling information 121 .

In addition, it is assumed that the mobile station successfully detects the uplink resource allocation information 122 . The mobile station sends uplink data 124 to the radio base station according to the uplink radio resource allocation information 122 . At this time, the mobile station reserves an area 125 for storing ACK/NACK in the PUSCH, stores the ACK/NACK in this area 125, and transmits the ACK/NACK to the radio base station.

For example, when the mobile station does not detect an error in the received downlink data 123, it stores the ACK in the area 125 and transmits it to the radio base station. When an error is detected in the received downlink data 123, the mobile station stores NACK in the area 125 and transmits it to the radio base station. The radio base station receives ACK/NACK from the area 125, and judges retransmission of downlink data based on this.

Assume that the mobile station fails to detect the downlink scheduling information 126 . At this time, the mobile station does not perform the reception process of the downlink data 128 .

In addition, it is assumed that the mobile station successfully detects the uplink radio resource allocation information 127 . The mobile station transmits uplink data 129 to the radio base station based on the uplink radio resource allocation information 127 .

At this time, the mobile station reserves an area 130 for storing ACK/NACK in the PUSCH, stores the NACK in this area, and transmits it to the radio base station. This is because the mobile station has not received downlink data.

In this way, an area for storing ACK/NACK is secured in the PUSCH. When the mobile station successfully detects the downlink scheduling information and receives the downlink data, it stores the ACK/NACK as the error detection result of the downlink data in the area and then sends it. If the detection of the downlink scheduling information fails and the downlink data is not received For data, store NACK in the area and send it.

As a result, the mobile station always transmits data to the radio base station in the same transport format having uplink data and ACK/NACK fields, so that the radio base station can correctly receive uplink data.

Fig. 15 is a functional block diagram of a radio base station. Each part of FIG. 15 has the same function as each part of the wireless base station 11 shown in FIG. 6 . However, the radio base station in FIG. 15 differs from the radio base station 11 in FIG. 6 in that downlink scheduling information and uplink radio resource allocation information are respectively subjected to error detection coding and error correction coding before being transmitted to the mobile station. Also, the difference is that the radio base station in FIG. 15 receives a PUSCH in which an area for storing ACK/NACK is reserved. In the following, only the parts different from those in Fig. 6 will be described.

Compared with the wireless base station 11 in FIG. 6, the wireless base station in FIG. 15 uses the error detection coding parts 132b, 132e and the error correction coding parts 132c, 132f to compare the downlink scheduling information output from the downlink data control data generation part 132a and the uplink data Encoding is performed using the uplink radio resource allocation information output by the control data generation unit 132d.

Also, the received signal processing unit 132l of the wireless base station in FIG. 15 identifies the ACK/NACK region of the PUSCH, extracts the ACK/NACK from the region, and outputs it to the decoding unit 132m.

Fig. 16 is a functional block diagram of a mobile station. Each part of FIG. 16 has the same function as each part of mobile station 12 shown in FIG. 7 . However, the mobile station in FIG. 16 is different from the mobile station 12 in FIG. 7 in that it receives separately coded downlink scheduling information and uplink radio resource allocation information. Also, the difference is that an area for storing ACK/NACK is secured in the PUSCH. In the following, only the parts different from those in Fig. 7 will be described.

The signal received by the mobile station in FIG. 16 is obtained by encoding downlink scheduling information and uplink radio resource allocation information respectively. Therefore, as opposed to the mobile station shown in FIG. 7, in the mobile station shown in FIG. They perform error detection decoding respectively.

The ACK/NACK generating unit 1421 generates ACK/NACK based on the error detection result of the downlink data. Also, when downlink data is not received, NACK is generated.

The transmission signal processing unit 142q reserves an area for storing ACK/NACK in the PUSCH. Then, the coded ACK/NACK is stored in the reserved area, and transmitted to the radio base station together with the uplink data.

In this way, the mobile station always sets an area for storing ACK/NACK in PUSCH and transmits ACK/NACK. As a result, the radio base station can always receive the PUSCH with the same transport format, and can correctly receive uplink data.

Next, a fifth embodiment of the present invention will be described in detail with reference to the drawings. In the fifth embodiment, when the mobile station transmits uplink data, it provides information indicating the presence or absence of ACK/NACK as control information.

Fig. 17 is a diagram showing operations of a radio base station and a mobile station according to the fifth embodiment. The figure shows downlink scheduling information 151, 157, uplink radio resource allocation information 152, 158, and downlink data 153, 159. In addition, uplink data 154, 160, an ACK/NACK field 155 secured in the PUSCH, and control information 156, 161 indicating the presence or absence of ACK/NACK are shown. In addition, downlink scheduling information 151, 157 and uplink radio resource allocation information 152, 158 are coded and transmitted to the mobile station.

Assume that the mobile station detects the downlink scheduling information 151 successfully. The mobile station receives downlink data 153 according to the downlink scheduling information 151 .

In addition, it is assumed that the mobile station successfully detects the uplink radio resource allocation information 152 . The mobile station transmits uplink data 154 to the radio base station according to the uplink radio resource allocation information 152 .

At this time, the mobile station reserves an area 155 for storing ACK/NACK in the PUSCH, and provides control information 156 indicating that the area 155 is reserved. The control information is represented by, for example, bit information, where 1 indicates that the ACK/NACK area 155 is secured, and 0 indicates that the ACK/NACK area 155 is not secured.

In addition, the mobile station successfully detects the downlink scheduling information 151 and receives the downlink data 153 . Therefore, the mobile station transmits ACK/NACK indicating the error detection result in the area 155 to the radio base station, and transmits control information 156 (bit 1) indicating that the area 155 is set to the radio base station.

Assume that the mobile station fails to detect the downlink scheduling information 157 . In this case, the mobile station does not perform the reception process of the downlink data 159 .

In addition, it is assumed that the mobile station successfully detects the uplink radio resource allocation information 158 . The mobile station transmits uplink data 160 to the radio base station according to the uplink radio resource allocation information 158 .

At this time, since the mobile station has not received the downlink data 159, no error detection is performed on the downlink data 159. Therefore, the mobile station does not reserve an area for storing ACK/NACK in the PUSCH, and transmits control information 161 (bit 0) indicating that no ACK/NACK area is reserved to the radio base station.

In this way, when the mobile station transmits ACK/NACK to the radio base station, control information indicating whether or not an area for transmitting ACK/NACK is secured is provided and transmitted to the radio base station.

Accordingly, the radio base station can determine whether or not ACK/NACK information is given to the uplink data, and can correctly receive the uplink data.

Fig. 18 is a functional block diagram of a radio base station. Each part of FIG. 18 has the same function as each part of the radio base station shown in FIG. 15 . However, the difference is that the radio base station in FIG. 18 extracts control information indicating that ACK/NACK storage area is reserved transmitted from the mobile station, and judges the presence or absence of ACK/NACK based on the extracted control information. In the following, only the parts different from those in Fig. 15 will be described.

In contrast to the radio base station in FIG. 15 , in the radio base station in FIG. 18 , the reception signal processing unit 1721 acquires control information included in the PUSCH. The decoding unit 172m decodes the control information acquired by the received signal processing unit 172l.

The ACK/NACK control information determination unit 172n determines whether the decoded control information is "1" or "0". That is, it is determined whether or not ACK/NACK is included in the PUSCH. If ACK/NACK is included, it is notified to the ACK/NACK determination unit 172p and the uplink data processing unit 172s. When the ACK/NACK determination unit 172p and the uplink data processing unit 172s recognize that the ACK/NACK region is reserved in the PUSCH, they perform ACK/NACK determination and uplink data processing.

Fig. 19 is a functional block diagram of a mobile station. The parts in FIG. 19 have the same functions as those in the mobile station shown in FIG. 16 . However, the mobile station in FIG. 19 is different from the mobile station in FIG. 16 in that it provides control information indicating whether or not an ACK/NACK area is reserved in the PUSCH. In the following, only the parts different from those in Fig. 16 will be described.

The ACK/NACK control information generation unit 1821 generates control information indicating whether or not an ACK/NACK area is reserved. For example, since ACK/NACK is to be transmitted to the radio base station when detection of downlink scheduling information succeeds, the ACK/NACK control information generator 1821 generates control information (bit 1) indicating that an ACK/NACK area is secured. When detection of downlink scheduling information fails, ACK/NACK is not transmitted to the radio base station, so the ACK/NACK control information generation unit 1821 generates control information (bit 0) indicating that no ACK/NACK area is reserved.

When ACK/NACK is generated, the transmission signal processing unit 182s reserves an ACK/NACK area in the PUSCH, multiplexes control information and uplink data, and transmits the result to the radio base station.

In this way, the mobile station provides control information indicating whether or not the ACK/NACK field is set in the PUSCH, and transmits it to the radio base station. Thereby, the radio base station can determine whether ACK/NACK is included in the PUSCH, and thus can recognize the transport format transmitted from the mobile station, and can correctly receive uplink data.

Next, a sixth embodiment of the present invention will be described in detail with reference to the drawings. In the sixth embodiment, the radio base station tries to receive a signal transmitted from the mobile station using a format in which ACK/NACK is multiplexed and a format in which ACK/NACK is not multiplexed.

Fig. 20 is a diagram showing operations of a radio base station and a mobile station according to the sixth embodiment. The figure shows downlink scheduling information 191, 198, uplink radio resource allocation information 192, 199, and downlink data 193, 200. In addition, uplink data 194 and 201 and an area 195 for storing ACK/NACK are shown. Also, PUSCH formats 196 , 197 , 202 , and 203 that the radio base station can attempt to receive are shown.

Assume that the mobile station detects the downlink scheduling information 191 successfully. The mobile station receives downlink data 193 according to the downlink scheduling information 191 .

In addition, it is assumed that the mobile station successfully detects the uplink radio resource allocation information 192 . The mobile station transmits uplink data 194 to the radio base station based on the uplink radio resource allocation information 192 .

At this time, since the mobile station has successfully received the downlink scheduling information 191, it reserves an area 195 for storing ACK/NACK in the PUSCH, and transmits the ACK/NACK to the radio base station.

The radio base station tries to receive the data received from the mobile station in the format 196 including the ACK/NACK field 195 and in the format 197 not including the ACK/NACK field 195 . The radio base station receives the PUSCH in the successfully received format. In the example of FIG. 20 , since the mobile station transmits the PUSCH including the region 195 , the radio base station successfully receives the PUSCH using the format 196 and fails to receive the PUSCH using the format 197 . In addition, the success or failure of reception is determined based on, for example, error detection of uplink data.

Assume that the mobile station fails to detect the downlink scheduling information 198 . In this case, the mobile station does not perform the reception process of the downlink data 200 .

In addition, it is assumed that the mobile station successfully detects the uplink radio resource allocation information 199 . The mobile station transmits uplink data 201 to the radio base station based on the uplink radio resource allocation information 199 .

At this time, since the mobile station has not received the downlink data 200, no area for storing ACK/NACK is reserved in the PUSCH. Therefore, the mobile station transmits only uplink data 201 to the radio base station.

The radio base station tries to receive the data received from the mobile station in the format 202 including the ACK/NACK field and in the format 203 not including the ACK/NACK field. The radio base station receives the PUSCH in the successfully received format. In the example of FIG. 20 , since the mobile station transmits a PUSCH that does not include an ACK/NACK field, the radio base station succeeds in receiving the PUSCH using the format 203 and fails in receiving the PUSCH using the format 202 .

In this way, the radio base station attempts to receive data using both the transport format including the ACK/NACK field and the transport format not including the ACK/NACK field that can be transmitted from the mobile station.

This allows the radio base station to correctly receive uplink data even if data in a different transport format is transmitted from the mobile station.

Fig. 21 is a functional block diagram of a radio base station. Each part of FIG. 21 has the same function as each part of the radio base station shown in FIG. 15 . However, the difference is that the radio base station in FIG. 21 has a function for recognizing the format of data received from the mobile station. In the following, only the parts different from those in Fig. 15 will be described.

As opposed to the radio base station in FIG. 15, in the radio base station in FIG. 21, the reception format control unit 212m combines a reception signal processing unit 212l, a decoding unit 212n, an ACK/NACK determination unit 212o, an error correction decoding unit 212p, and an error detection decoding unit 212q. And the uplink data processing unit 212r controls to process the received data using both the format in which the ACK/NACK field is multiplexed and the format in which the ACK/NACK field is not multiplexed. The reception signal processing unit 212l, the decoding unit 212n, the ACK/NACK determination unit 212o, the error correction decoding unit 212p, and the uplink data processing unit 212r perform processing using a format in which an error has not been detected in the uplink data by the error detection decoding unit 212q.

Fig. 22 is a functional block diagram of a mobile station. The parts in FIG. 22 have the same functions as those in the mobile station shown in FIG. 16 . However, the mobile station in FIG. 22 is different from the mobile station in FIG. 16 in that ACK/NACK areas are not always secured. In the following, only the parts different from 16 will be described.

When error detection is performed on downlink data, the ACK/NACK generation unit 222n of the mobile station in FIG. 22 generates ACK/NACK. Therefore, since the ACK/NACK field is not generated when detection of downlink scheduling information fails, the mobile station in FIG. 22 transmits the PUSCH including the ACK/NACK field and the PUSCH not including the ACK/NACK field to the radio base station.

In this way, the mobile station transmits ACK/NACK to the radio base station based on error detection of downlink data, and therefore transmits two transport formats, PUSCH including the ACK/NACK field and PUSCH not including the ACK/NACK field, to the radio base station. The radio base station performs reception processing of the PUSCH from the mobile station using two types of transport formats including an ACK/NACK field and a transport format not including an ACK/NACK field. Thus, even if the transmission format transmitted from the mobile station is not uniform, the radio base station can correctly receive uplink data.

Next, a seventh embodiment of the present invention will be described in detail with reference to the drawings. In the seventh embodiment, when the mobile station transmits the ACK/NACK for the downlink data and the uplink data to the radio base station, the ACK/NACK for the downlink data and the uplink data are not time-multiplexed in the PUSCH. The mobile station sends ACK/NACK for downlink data in the pre-assigned PUCCH or the PUCCH associated with the radio resources for sending downlink data or downlink control data, and sends uplink data in the PUSCH assigned by the uplink radio resource allocation information.

FIG. 23 is a diagram showing operations of a radio base station and a mobile station according to the seventh embodiment. In the figure, downlink scheduling information 231, 238, uplink radio resource allocation information 232, 239, and downlink data 233, 240 are shown. In addition, PUSCHs 234, 236, 241, and 243 for transmitting uplink data and PUCCHs 235, 237, 242, and 244 for transmitting ACK/NACK are shown.

Assume that the mobile station successfully detects the downlink scheduling information 231 . The mobile station receives downlink data 233 according to the downlink scheduling information 231 . In addition, it is assumed that the mobile station successfully detects the uplink radio resource allocation information 232 . The mobile station sends uplink data according to the uplink radio resource allocation information 232 .

Since the mobile station has received the downlink data 233, it detects an error in the downlink data 233, and transmits ACK/NACK as the detection result to the radio base station. The mobile station transmits ACK/NACK to the radio base station in PUCCH235, and transmits uplink data to the radio base station in PUSCH234. That is, the mobile station multiplexes the ACK/NACK for the downlink data 233 and the uplink data in the frequency domain, and transmits the multiplexed data to the radio base station.

The radio base station attempts to receive the ACK/NACK for the downlink data 233 on the PUCCH assigned in advance or associated with the downlink data or the downlink data. Then, since the mobile station successfully detects the downlink scheduling information 231 , the radio base station receives ACK/NACK in the PUCCH 237 . In addition, uplink data is received in PUSCH236.

Assume that the mobile station fails to detect the downlink scheduling information 238 . In this case, the mobile station does not perform the reception process of the downlink data 240 .

In addition, it is assumed that the mobile station successfully detects the uplink radio resource allocation information 239 . The mobile station transmits uplink data through the PUSCH 241 according to the uplink radio resource allocation information 239 .

On the other hand, since the mobile station does not perform the reception process of the downlink data 240, it does not transmit ACK/NACK to the radio base station. In this case, the mobile station does not send any data in PUCCH 242 .

The radio base station tries to receive ACK/NACK in PUCCH244. However, since the mobile station does not transmit any data in PUCCH 242, the radio base station detects DTX. The radio base station receives uplink data in PUSCH243.

In this way, since the ACK/NACK for downlink data and the radio resources for transmitting uplink data are separated into PUCCH and PUSCH respectively, there will be no discrepancy between the transmission format of PUSCH transmitted by the mobile station and the transmission format of PUSCH predicted by the wireless base station. inconsistent. In addition, since uplink data is transmitted on the PUCCH regardless of whether uplink data is transmitted, ACK/NACK for downlink data can be transmitted and received independently of uplink data.

Fig. 24 is a functional block diagram of a radio base station. Each part of FIG. 24 has the same function as each part of the radio base station shown in FIG. 15 . However, the difference is that in the radio base station in FIG. 24 , ACK/NACK/DTX are decoded and determined by the PUCCH reception processing unit 253 . In addition, the difference lies in that the PUSCH reception processing unit 254 performs reception processing on uplink data. In the following, only the parts different from those in Fig. 15 will be described.

The decoding unit 252m of the PUCCH reception processing unit 253 decodes data transmitted from the mobile station on the PUCCH. The ACK/NACK/DTX determination unit 252n determines ACK/NACK based on the decoded data. If there is no decoded data, the ACK/NACK/DTX determination unit 252n detects DTX.

The error correction decoding unit 252o of the PUSCH reception processing unit 254 performs error correction decoding on the uplink data transmitted from the mobile station on the PUSCH. The error detection decoding unit 252p performs error detection decoding on the uplink data transmitted from the mobile station via the PUSCH. The uplink data processing unit 252q processes uplink data transmitted through the PUSCH.

Fig. 25 is a functional block diagram of a mobile station. The parts in FIG. 25 have the same functions as those in the mobile station shown in FIG. 16 . However, the difference is that in the mobile station shown in FIG. 25 , ACK/NACK is generated and encoded by the PUCCH transmission processing unit 263 . Also, the difference is that the PUSCH transmission processing unit 264 performs transmission processing on uplink data. In the following, only the parts different from those in Fig. 16 will be described.

The ACK/NACK generation unit 2621 of the PUCCH transmission processing unit 263 generates ACK/NACK from downlink data. The decoding unit 262m encodes the generated ACK/NACK and processes it so as to transmit it on the PUCCH.

The uplink data generation unit 262n of the PUSCH transmission processing unit 264 generates uplink data. The error detection coding unit 262o performs error detection coding on the uplink data. The error correction coding unit 262p performs error correction coding on the uplink data, and performs processing so as to transmit it on the PUSCH.

In this way, the mobile station sends ACK/NACK on the PUCCH and uplink data on the PUSCH. As a result, inconsistency between the PUSCH transmission format and the PUSCH transmission format does not occur at the radio base station, and thus uplink data can be correctly received.

The foregoing merely illustrates the principles of the invention. Moreover, for those skilled in the art, various modifications and changes can be made. The present invention is not limited to the exact structures and application examples shown and described above, and all corresponding modification examples and equivalents are deemed to fall within The scope of the invention is defined by the appended claims and their equivalents.

Claims (2)

1. a kind of wireless communication system, this wireless communication system has mobile station and wireless base station, wherein：

Described mobile station has：

Information generation unit, it receives down dispatch information in same subframe and ascending wireless resource distributes the situation of information Under, generate the error detection information representing the error detection of downstream signal receiving；And

Sending part, it sends described error detection information in ascending control channel, is started with sending in uplink data channels Time utilizes different transmission frequency transmission upstream datas with sending the end time mode consistent from described ascending control channel,

Described wireless base station has：

Ascending control channel acceptance division, it have sent described down dispatch information and described to described mobile station in same subframe In the case of ascending wireless resource distribution information, described ascending control channel receives described error detection information；And

Uplink data channels acceptance division, its receive described mobile station side, with described ascending control channel with comprise described up The sending the time started and send end time consistent mode, utilization different from the described of described uplink data channels of data The described uplink data channels that the transmission frequency of row control channel sends.

2. a kind of wireless communications method, wherein：

In the case that mobile station receives down dispatch information and ascending wireless resource distribution information in same subframe, generate table Show the error detection information of the error detection of the downstream signal receiving, and send described error detection in ascending control channel Information, in uplink data channels in the way of the transmission time started is consistent with described ascending control channel with the transmission end time Send upstream data using different transmission frequency,

Wireless base station have sent down dispatch information to mobile station in same subframe and ascending wireless resource distributes the feelings of information In ascending control channel, under condition, receive the error detection letter of the error detection of downstream signal representing that described mobile station receives Breath, and receive in described mobile station side, with the transmission of described ascending control channel and the uplink data channels comprising upstream data Time started with send end time consistent mode, the institute sending using the transmission frequency different from described ascending control channel State uplink data channels.