Mobile station apparatus, base station apparatus, and communication method

摘要

The present invention enables a signal containing control information to be efficiently transmitted and received between a base station apparatus and a mobile station apparatus. The mobile station apparatus includes a first control unit configured to control, for a localized EPDCCH which is an EPDCCH constituted by a resource of one PRB pair, the EPDCCH being constituted by an aggregation of one or more ECCEs, a plurality of PRB pairs being configured as a region to which the EPDCCH is to be possibly mapped, an antenna port associated with a reference signal used for demodulation of a signal mapped to a corresponding ECCE constituted by a resource obtained by dividing the PRB pair.

主权项

1. A mobile station apparatus configured to communicate with a base station apparatus, comprising:
a control circuit configured to set, on the basis of higher layer signaling, two sets of PRB (Physical Resource Block) pairs for monitoring an EPDCCH (Enhanced Physical Downlink Control Channel); and a reception processing circuit configured to receive the EPDCCH, the EPDCCH transmitted through use of one or more ECCEs (Enhanced Control Channel Element) in either one of the two sets of PRB pairs, which is configured for localized EPDCCH transmission, and a demodulation reference signal, which is associated with the EPDCCH, wherein
an antenna port for the EPDCCH transmission is given by at least an index of the ECCE and a configured value based on the higher layer signaling,the demodulation reference signal is transmitted on the antenna port and on the PRBs upon which the EPDCCH is mapped,in a case that the number of the ECCEs for each of the PRB pairs is four, each of the PRB pairs includes a first ECCE, a second ECCE, a third ECCE and a fourth ECCE,indices of the first ECCE, the second ECCE, the third ECCE, and the fourth ECCE are consecutive,the antenna port of the EPDCCH, which is transmitted by using the first ECCE and the second ECCE, is a first antenna port or a second antenna port, andthe antenna port of the EPDCCH, which is transmitted by using the third ECCE and the fourth ECCE, is a third antenna port or a fourth antenna port.