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Base station apparatus, terminal apparatus, communication method, integrated circuit, and communication system

  • US 9,510,337 B2
  • Filed: 03/07/2013
  • Issued: 11/29/2016
  • Est. Priority Date: 03/15/2012
  • Status: Active Grant
First Claim
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1. A base station apparatus that is configured to and/or programmed to communicate with a terminal apparatus, the base station apparatus comprising:

  • a transmitter configured to and/or programmed to transmit an Enhanced Physical Downlink Control CHannel (EPDCCH) in an EPDCCH region, whereinphysical resource block pairs corresponding to the EPDCCH region are indicated by higher layers,the EPDCCH is transmitted using one or a plurality of enhanced control channel elements,the enhanced control channel element consists of a plurality of enhanced resource element groups in one physical resource block pair in a case that the enhanced control channel element is subject to a localized mapping,the enhanced control channel element consists of a plurality of enhanced resource element groups in a plurality of physical resource block pairs in a case that the enhanced control channel element is subject to a distributed mapping,in a case of the localized mapping, an EPDCCH UE-specific search space monitored by the terminal apparatus at an aggregation level is defined by a plurality of EPDCCH candidates, n-th EPDCCH candidate and (n+1)-th EPDCCH candidate in the plurality of EPDCCH candidates correspond to enhanced control channel elements in different physical resource block pairs, anda relationship between a number assigned to each EPDCCH candidate and a number assigned to each enhanced control channel element does not vary regardless of whether the enhanced control channel element is subject to the localized mapping or the distributed mapping.

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