INTEGRATED CIRCUIT FOR SPREADING RESPONSE SIGNAL

摘要

A radio communication apparatus receives control information on one or more control channel elements (CCEs) with consecutive CCE number(s). The radio communication apparatus first-spreads a response signal with a sequence defined by a cyclic shift value that is determined among a plurality of cyclic shift values from an index of physical uplink control channel (PUCCH), which is associated with a first CCE number of the one or more CCEs, and second-spreads the first-spread response signal with an orthogonal sequence that is determined among a plurality of orthogonal sequences from the index. One of cyclic shift values used for an orthogonal sequence is determined from an index of the PUCCH, which is associated with an odd CCE number, and another one of the cyclic shift values used for the same orthogonal sequence is determined from an index of the PUCCH, which is associated with an even CCE number.

主权项

1. A radio communication device comprising:
a receiving unit configured to receive control information on one or a plurality of control channel elements (CCEs) with consecutive CCE number(s); a spreading unit configured to first-spread a response signal with a sequence defined by a cyclic shift value, which is determined from a starting CCE number of the one or more CCE(s) on which the control information is received, and configured to second-spread the first-spread response signal with an orthogonal sequence, which is determined among a plurality of orthogonal sequences from said starting CCE number; and a transmitting unit configured to transmit the second-spread response signal; wherein, in case the control information is received on one CCE, the cyclic shift value is associated with the starting CCE number of said one CCE, the orthogonal sequence is determined from said starting CCE number, and a cyclic shift value consecutive to said cyclic shift value used with the same orthogonal sequence is associated with a starting CCE number of one or more CCE(s); and in case the control information is received on plural CCEs, the cyclic shift value is associated with the starting CCE number of said plural CCEs, the orthogonal sequence is determined from said starting CCE number, and a cyclic shift value consecutive to said cyclic shift value used with the same orthogonal sequence is associated with a starting CCE number of one CCE.