BASE STATION APPARATUS, TERMINAL DEVICE, AND RANK SETTING METHOD

摘要

A base station apparatus, in a wireless communication system supporting band aggregation, able to limit drops in throughput while lowering the amount of control information for the rank of an added band; and a terminal device and rank setting method of the same.  An added band rank setting unit (108) includes a memory (1084) which defines, as a rank and from the eigenvalue distributions of the channel matrices of the master band and added band, the number of eigenvalues of the channel matrix of the added band that satisfy channel quality according to the rank of the master band, and associates that number with the frequency band and rank of the master band and the frequency band of the added band.  The added band rank setting unit (108) acquires, from the memory (1084), the rank that is associated with the information on the frequency band and rank of the master band and the information on the frequency band of the added band, and sets the same as the rank of the added band.