Patent ID: 9554380
Date: 2017-01-24
CPC Classifications: H04L,H04W

Claim:
1. A communication apparatus comprising: a division number calculator which, in operation, calculates a division number based on a number of OFDM symbols used for an Enhanced Physical Downlink Control CHannel (EPDCCH), the division number being a number of Control Channel Elements (CCEs) per resource block pair, the EPDCCH being a resource region that is defined in a data region of a subframe and that is configured to transmit either of downlink control information and downlink data, wherein the division number calculator, in operation, calculates the division number such that the division number for a subframe having a Normal cyclic prefix length is larger than the division number for a subframe having an Extended cyclic prefix length; a controller which, in operation, sets the division number of CCEs in the resource block pair according to the calculated division number, and sets a plurality of resource region candidates, each resource region candidate including at least one CCE; and a mapper which, in operation, maps the downlink control information to one of the plurality of resource region candidates.