Radio commnication device and response signal diffusion method

Abstract

A radio communication apparatus comprises a spreading unit and a transmitting unit. The spreading unit spreads an ACK/NACK signal or a CQI signal with a sequence defined by one of a plurality of cyclic shift values. The transmitting unit transmits the ACK/NACK signal or the CQI signal. In each symbol that forms the ACK/NACK signal or the CQI signal, the spreading unit uses one of first cyclic shift values, which form a portion of the plurality of the cyclic shift values and which are adjacent to each other, for the ACK/NACK signal, and uses one of second cyclic shift values, which are not within the portion of the plurality of the cyclic shift values, for the CQI signal. At least one cyclic shift value that is cyclically subsequent to the first cyclic shift values or the second cyclic shift values is not used for either the ACK/NACK signal or the CQI signal.

What is claimed is: 
     
         1 . A mobile station apparatus comprising:
 a first spreading unit configured to spread an ACK/NACK signal with a sequence defined by one of twelve cyclic shift values, the sequence being one of twelve sequences that are mutually separable because of mutually different cyclic shift values of the twelve cyclic shift values;   a second spreading unit configured to spread a CQI signal with a sequence defined by another one of the twelve cyclic shift values, the sequence being another of the twelve sequences;   a third spreading unit configured to spread the ACK/NACK signal, after the ACK/NACK signal has been spread with the sequence defined by one of twelve cyclic shift values, with a sequence that is one of three orthogonal sequences that each have a different respective orthogonal sequence number of first, second and third orthogonal sequence numbers;   a control section configured to:   control the spreading of the ACK/NACK signal by the first spreading unit by setting a code-multiplexing cyclic shift value, of first cyclic shift values for spreading ACK/NACK signals, in accordance with a code-multiplexing structure for code-multiplexing ACK/NACK signals and CQI signals from a plurality of mobile stations;   control the spreading of the CQI signal by the second spreading unit by setting a code-multiplexing cyclic shift value, of second cyclic shift values for spreading CQI signals, in accordance with the code-multiplexing structure; and   control the spreading of the ACK/NACK signal by the third spreading unit by setting a code-multiplexing orthogonal sequence number, of the first, second and third of orthogonal sequence numbers, in accordance with the code-multiplexing structure; and   a transmitting unit configured to transmit the ACK/NACK signal, and configured to transmit the CQI signal,   wherein the first cyclic shift values for spreading ACK/NACK signals and the first, second and third orthogonal sequence numbers are arranged in a 2-cyclic shift interval mesh structure in the code-multiplexing structure, according to which ACK/NACK signals for which the second orthogonal sequence number is set have 2-cyclic-shift-interval cyclic shift values set that are offset by one cyclic shift value with respect to 2-cyclic-shift-interval cyclic shift values that set for the ACK/NACK signals for which the first and third orthogonal sequence numbers are set,   wherein the CQI signals in the code-multiplexing structure are not spread with any of the orthogonal sequences, and   wherein an unusable cyclic shift value is positioned after an immediately preceding cyclic shift value for spreading CQI signals, and before an immediately subsequent cyclic shift value for spreading ACK/NACK signals, in the code-multiplexing structure.   
     
     
         2 . The mobile station apparatus of  claim 1 , wherein the unused cyclic shift value forms a predefined interval in the code-multiplexing structure, between the cyclic shift values for spreading CQI signals and the cyclic shift values for spreading ACK/NACK signals, which is equal to the 2-cyclic-shift interval in cyclic shift values between the ACK/NACK signals in the mesh structure. 
     
     
         3 . The mobile station apparatus of  claim 1 , wherein both a symbol that forms the ACK/NACK signal and a symbol that forms a CQI signal transmitted from another radio communication apparatus are mapped to a same symbol; or both a symbol that forms the CQI signal and a symbol that forms an ACK/NACK signal transmitted from another radio communication apparatus are mapped to a same symbol. 
     
     
         4 . The mobile station apparatus of  claim 1 , wherein both the ACK/NACK signal and a CQI signal which is transmitted from another mobile station, or both the CQI signal and an ACK/NACK signal which is transmitted from another mobile station, are mapped to a resource in a same frequency and in a same slot. 
     
     
         5 . The mobile station apparatus of  claim 1 , wherein the ACK/NACK signal is code-multiplexed with a CQI signal transmitted from another mobile station, or the CQI signal is code-multiplexed with an ACK/NACK signal transmitted from another mobile station. 
     
     
         6 . The mobile station apparatus of  claim 1 , wherein said third spreading unit is configured to use a sequence having a length  4  as the orthogonal sequence. 
     
     
         7 . The mobile station apparatus of  claim 1 , wherein a further unused cyclic shift value is positioned after an immediately preceding cyclic shift value for spreading ACK/NACK signals, and before an immediately subsequent cyclic shift value for spreading CQI signals, in the code-multiplexing structure. 
     
     
         8 . The mobile station apparatus of  claim 1 , wherein the cyclic shift values for spreading ACK/NACK signals consist of a single set of consecutive cyclic shift values. 
     
     
         9 . The mobile station apparatus of  claim 1 , comprising a receiver configured to receive control information on a control channel element, CCE, wherein
 the CCE is determinative of the code-multiplexing cyclic shift value which is set to the control the spreading of the ACK/NACK signal by the first spreading unit.   
     
     
         10 . The mobile station apparatus of  claim 1 , wherein the 2-cyclic shift interval mesh structure is determinative of a physical uplink control channel, PUCCH. 
     
     
         11 . The mobile station apparatus of  claim 1 , wherein the first, second and third spreading units comprise processor circuitry. 
     
     
         12 . A base station apparatus comprising:
 a transmitting unit configured to transmit data to a mobile station; and   a receiving unit configured to receive an ACK/NACK signal or a CQI signal, which is spread in accordance with a code-multiplexing structure for code-multiplexing ACK/NACK signals and CQI signals from a plurality of mobile stations, from the mobile station, wherein:   the ACK/NACK signal is spread with a sequence defined by one of twelve cyclic shift values, the sequence being one of twelve sequences that are mutually separable because of mutually different cyclic shift values of the twelve cyclic shift values;   the CQI signal is spread with a sequence defined by another one of the twelve cyclic shift values, the sequence being another of the twelve sequences;   the ACK/NACK signal, after the ACK/NACK signal has been spread with the sequence defined by one of twelve cyclic shift values, is spread with a sequence that is one of three orthogonal sequences that each have a different respective orthogonal sequence number of first, second and third orthogonal sequence numbers;   the spreading of the ACK/NACK signal is controlled by setting a code-multiplexing cyclic shift value, of first cyclic shift values for spreading ACK/NACK signals, in accordance with the code-multiplexing structure;   the spreading of the CQI signal is controlled by setting a code-multiplexing cyclic shift value, of second cyclic shift values for spreading CQI signals, in accordance with the code-multiplexing structure; and   the spreading of the ACK/NACK signal is controlled by setting a code-multiplexing orthogonal sequence number, of the first, second and third orthogonal sequence numbers, in accordance with the code-multiplexing structure,   wherein the first cyclic shift values for spreading ACK/NACK signals and the first, second and third orthogonal sequence numbers are arranged in a 2-cyclic shift interval mesh structure in the code-multiplexing structure, according to which ACK/NACK signals for which the second orthogonal sequence number is set have 2-cyclic-shift-interval cyclic shift values set that are offset by one cyclic shift value with respect to 2-cyclic-shift-interval cyclic shift values that are set for the ACK/NACK signals for which the first and third orthogonal sequence numbers are set,   wherein the CQI signals in the code-multiplexing structure are not spread with any of the orthogonal sequences, and   wherein an unused cyclic shift value is positioned after an immediately preceding cyclic shift value for spreading CQI signals, and before an immediately subsequent cyclic shift value for spreading ACK/NACK signals, in the code-multiplexing structure.   
     
     
         13 . The base station apparatus of  claim 12 , wherein the unused cyclic shift value forms a predefined interval in the code-multiplexing structure, between the cyclic shift values for spreading CQI signals and the cyclic shift values for spreading ACK/NACK signals, which is equal to the 2-cyclic-shift interval in cyclic shift values between the ACK/NACK signals in the mesh structure. 
     
     
         14 . The base station apparatus of  claim 12 , wherein the transmitter is configured to transmit control information on a control channel element, CCE, and
 wherein the CCE is determinative of the code-multiplexing cyclic shift value which is set to the control the spreading of the ACK/NACK signal.   
     
     
         15 . A method for spreading an ACK/NACK signal and a CQI signal in accordance with a code-multiplexing structure for code-multiplexing ACK/NACK signals and CQI signals from a plurality of mobile stations, the method comprising:
 spreading the ACK/NACK signal with a sequence defined by one of twelve cyclic shift values, the sequence being one of twelve sequences that are mutually separable because of mutually different cyclic shift values of the twelve cyclic shift values;   spreading the CQI signal with a sequence defined by another one of the twelve cyclic shift values, the sequence being another of the twelve sequences;   spreading the ACK/NACK signal, after the ACK/NACK signal has been spread with the sequence defined by one of twelve cyclic shift values, with a sequence that is one of three orthogonal sequences that each have a different respective orthogonal sequence number of first, second and third orthogonal sequence numbers;   controlling the spreading of the ACK/NACK signal by setting a code-multiplexing cyclic shift value, of first cyclic shift values for spreading ACK/NACK signals, in accordance with the code-multiplexing structure;   controlling the spreading of the CQI signal by setting a code-multiplexing cyclic shift value, of second cyclic shift values for spreading CQI signals, in accordance with the code-multiplexing structure; and   controlling the spreading of the ACK/NACK signal by setting a code-multiplexing orthogonal sequence number, of the first, second and third orthogonal sequence numbers, in accordance with the code-multiplexing structure,   wherein the first cyclic shift values for spreading ACK/NACK signals and the first, second and third orthogonal sequence numbers are arranged in a 2-cyclic shift interval mesh structure in the code-multiplexing structure, according to which ACK/NACK signals for which the second orthogonal sequence number is set have 2-cyclic-shift-interval cyclic shift values set that are offset by one cyclic shift value with respect to 2-cyclic-shift-interval cyclic shift values that are set for the ACK/NACK signals for which the first and third orthogonal sequence numbers are set,   wherein the CQI signals in the code-multiplexing structure are not spread with any of the orthogonal sequences, and   wherein an unused cyclic shift value is positioned after an immediately preceding cyclic shift value for spreading CQI signals, and before an immediately subsequent cyclic shift value for spreading ACK/NACK signals, in the code-multiplexing structure.   
     
     
         16 . The method of  claim 15 , wherein the unused cyclic shift value forms a predefined interval in the code-multiplexing structure, between the cyclic shift values for spreading CQI signals and the cyclic shift values for spreading ACK/NACK signals, which is equal to the 2-cyclic-shift interval in cyclic shift values between the ACK/NACK signals in the mesh structure. 
     
     
         17 . The method of  claim 15 , wherein a further unused cyclic shift value is positioned after an immediately preceding cyclic shift value for spreading ACK/NACK signals, and before an immediately subsequent cyclic shift value for spreading CQI signals, in the code-multiplexing structure. 
     
     
         18 . The method of  claim 15 , wherein the cyclic shift values for spreading ACK/NACK signals consist of a single set of consecutive cyclic shift values. 
     
     
         19 . The method of  claim 15 , comprising receiving control information on a control channel element, CCE, wherein the CCE is determinative of the code-multiplexing cyclic shift value which is set to the control the spreading of the ACK/NACK signal by the first spreading unit. 
     
     
         20 . The method of  claim 15 , wherein the 2-cyclic shift interval mesh structure is determinative of a physical uplink control channel, PUCCH.