Method and apparatus for receiving control information through blind decoding of an enhanced physical downlink control channel (EPDCCH)
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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Abstract
One embodiment of the present invention provides a method for enabling a terminal to receive control information in a wireless communication system, comprising the steps of: determining resource units for Enhanced Physical Downlink Control Channel (EPDCCH) of a plurality of resource units, with respect to each of one or more resource sets; and blind-decoding the resource units for the EPDCCH with respect to each of the one or more resource sets, wherein each of the one or more resource sets is set for one of localized EPDCCH transmission or distributed EPCCH transmission.
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Citations
12 Claims
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1. A method for receiving control information by a user equipment (UE) in a wireless communication system, the method comprising:
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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, and wherein the scrambling identity nSCID for the EPDCCH DMRS does not depend on scrambling identity information contained in downlink control information (DCI). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A user equipment in a wireless communication system, comprising:
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a receiver configured to receive, via higher layer signaling, an enhanced physical downlink control channel (EPDCCH) configuration; and a processor configured to perform 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, and wherein 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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Specification