Patent ID: 9654259
Date: 2017-05-16
CPC Classifications: H04L,H04W

Claim:
1. A communication apparatus comprising: a receiver, which, in operation, receives a control channel transmitted on a search space, which is defined by candidates to be decoded by the communication apparatus; and a decoder, which, in operation, decodes the control channel, wherein: when the communication apparatus is configured to decode the candidates of the search space in each of a first region and a second region, the search space is configured according to each of a first rule that configures the search space in the first region and a second rule that configures the search space in the second region, each of the first and second rules defining an association between an aggregation level of a control channel element (CCE), on which the control channel is transmitted, and a number of the candidates to be decoded, and the association defined in the first rule being different from the association defined in the second rule; and when the communication apparatus is configured to decode the candidates of the search space in the first region, the search space is configured according to a third rule that configures the search space in the first region, the third rule defining an association between an aggregation level of the CCE, on which the control channel is transmitted, and a number of the candidates to be decoded.