Terminal apparatus and sequence assigning method

摘要

Provided is a sequence allocation method capable of reducing inter-cell interference of a reference signal when a ZC sequence is used as the reference signal in a mobile communication system. In the sequence allocation method, R×M sequences specified by a ZC sequence number r (r=1 to R) and a cyclic shift sequence number m (m=1 to M) are divided into a plurality of sequence groups X (X=1 to R) in accordance with the transmission band width of the reference signal, so that the ZC sequence is allocated to each cell in each sequence group unit. When it is assumed that R=9 and M=6, the number of sequences is 54. Each of the sequence groups is formed by two sequences. Accordingly, the number of sequence groups is 27. The 27 types of sequence groups are allocated to each cell.

主权项

1. An integrated circuit to control a process, the process comprising:
transmitting, to a mobile station, control information related to a sequence in one of multiple groups, into which sequences for each of multiple sequence lengths having at least two different lengths are divided; and receiving a reference signal, which is generated using the sequence in one of the multiple groups based on the control information and which is transmitted from the mobile station, wherein a first respective predefined number of sequence(s) contained in a first group of the multiple groups into which sequences having a first sequence length are divided is less than a second respective predefined number of sequences contained in a second group of the multiple groups into which sequences having a second sequence length are divided where the first sequence length is less than a threshold value and the second sequence length is greater than or equal to the threshold value.