Patent ID: 8073037
Filing Date: 2011-12-06
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A base station apparatus comprising: a transmitting unit configured to transmit data to a radio communication apparatus, and transmit, to the radio communication apparatus, control information on one or a plurality of control channel elements (CCEs) with consecutive CCE number(s); and a receiving unit configured to receive a response signal corresponding to the data, the response signal being transmitted from the radio communication apparatus, wherein: the response signal is spread with a sequence defined by a cyclic shift value, which is determined among a plurality of cyclic shift values from a resource associated with the CCE number, and with an orthogonal sequence, which is determined among a plurality of orthogonal sequences from said resource; and different cyclic shift values used for the same orthogonal sequence are respectively determined from the resource associated with an odd CCE number and the resource associated with an even CCE number.