Patent ID: 8526376
Filing Date: 2013-09-03
Classification: H04B,H04J,H04L,H04W

Abstract:
1. A terminal apparatus comprising: a deciding section, embodied on a processor, configured to decide a resource index of an uplink control channel to which a response signal to downlink data is mapped; and a control section configured to determine a sequence, which is used for the response signal, from the decided resource index of the uplink control channel, wherein: a downlink control channel is allocated to one or several consecutive control channel element(s) (CCE(s)) in a search space, which is comprised of CCEs corresponding to a plurality of downlink control channel candidates to be attempted to be decoded; said deciding section decides the resource index of the uplink control channel based on the CCE(s), to which the downlink control channel is allocated; and the search space for each aggregation size corresponding to a number of the CCE(s), to which the downlink control channel is allocated, is comprised of CCEs that are defined by starting on a CCE with a CCE number, which depends on both a total number of CCEs in a subframe and the aggregation size, and at least part of the search space for the each aggregation size is comprised of CCEs with consecutive CCE numbers.