Method and apparatus for receiving control information through blind decoding of an enhanced physical downlink control channel (EPDCCH)
First Claim
Patent Images
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 demodulation for an EPDCCH using a EPDCCH demodulation reference signal (DMRS),wherein the EPDCCH configuration indicates an EPDCCH DMRS scrambling sequence parameter 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 a scrambling identity for the EPDCCH DMRS,wherein the scrambling identity (nSCID) for the EPDCCH DMRS is a fixed value, and does not depend on scrambling identity information of 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
20 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:
-
receiving, via higher layer signaling, an enhanced physical downlink control channel (EPDCCH) configuration; and performing demodulation for an EPDCCH using a EPDCCH demodulation reference signal (DMRS), wherein the EPDCCH configuration indicates an EPDCCH DMRS scrambling sequence parameter 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 a scrambling identity for the EPDCCH DMRS,wherein the scrambling identity (nSCID) for the EPDCCH DMRS is a fixed value, and does not depend on scrambling identity information of downlink control information (DCI). - View Dependent Claims (2, 3, 4, 5)
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6. A method for transmitting control information by a base station (BS) in a wireless communication system, the method comprising:
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transmitting, via higher layer signaling, an enhanced physical downlink control channel (EPDCCH) configuration; and transmitting an EPDCCH and a EPDCCH demodulation reference signal (DMRS) based on the EPDCCH configuration, wherein the EPDCCH configuration indicates an EPDCCH DMRS scrambling sequence parameter 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 a scrambling identity for the EPDCCH DMRS,wherein the scrambling identity (nSCID) for the EPDCCH DMRS is a fixed value, and does not depend on scrambling identity information of downlink control information (DCI). - View Dependent Claims (7, 8, 9, 10)
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11. A user equipment (UE) comprising:
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a receiver to receive, via higher layer signaling, an enhanced physical downlink control channel (EPDCCH) configuration; and a processor to perform demodulation for an EPDCCH using a EPDCCH demodulation reference signal (DMRS), wherein the EPDCCH configuration indicates an EPDCCH DMRS scrambling sequence parameter 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 a scrambling identity for the EPDCCH DMRS,wherein the scrambling identity (nSCID) for the EPDCCH DMRS is a fixed value, and does not depend on scrambling identity information of downlink control information (DCI). - View Dependent Claims (12, 13, 14, 15)
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16. A base station (BS) comprising:
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a transmitter; a processor controls the transmitter to transmit, via higher layer signaling, an enhanced physical downlink control channel (EPDCCH) configuration, and to transmit an EPDCCH and a EPDCCH demodulation reference signal (DMRS) based on the EPDCCH configuration, wherein the EPDCCH configuration indicates an EPDCCH DMRS scrambling sequence parameter 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 a scrambling identity for the EPDCCH DMRS,wherein the scrambling identity (nSCID) for the EPDCCH DMRS is a fixed value, and does not depend on scrambling identity information of downlink control information (DCI). - View Dependent Claims (17, 18, 19, 20)
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Specification