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Method and apparatus for receiving control information through blind decoding of an enhanced physical downlink control channel (EPDCCH)

  • US 9,445,413 B2
  • Filed: 03/22/2013
  • Issued: 09/13/2016
  • Est. Priority Date: 03/22/2012
  • Status: Active Grant
First Claim
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1. A method for receiving control information by a user equipment (UE) in a wireless communication system, the method comprising:

  • receiving, via higher layer signaling, an enhanced physical downlink control channel (EPDCCH) configuration; and

    performing blind decoding on a plurality of physical resource block (PRB) pairs corresponding to each of at least one EPDCCH PRB set based on the EPDCCH configuration,wherein in performing the blind decoding, demodulation for an EPDCCH is performed by using a EPDCCH demodulation reference signal (DMRS),wherein the EPDCCH configuration indicates an EPDCCH DMRS scrambling sequence parameter for the EPDCCH DMRS other than a scrambling identity for the EPDCCH DMRS,wherein a scrambling sequence for the EPDCCH DMRS is initialized based on an equation ‘

    (|ns/2|+1)·

    (2X+1)·

    216+nSCID

    ,where ‘

    ns

    denotes a slot number, ‘

    X’

    denotes the EPDCCH DMRS scrambling sequence parameter indicated by the EPDCCH configuration and ‘

    nSCID

    denotes the scrambling identity,wherein the scrambling identity (nSCID) for the EPDCCH DMRS is always fixed to a specific value, andwherein the scrambling identity nSCID for the EPDCCH DMRS does not depend on scrambling identity information contained in downlink control information (DCI).

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