METHOD FOR BASE STATION TO MULITIPLEX DOWNLINK CONTROL CHANNEL IN WIRELESS COMMUNICATION SYSTEM AND APPARATUS THEREFOR
First Claim
1. A method for transmitting a downlink control channel via one or more resource blocks (RBs) at a base station in a wireless communication system, the method comprising:
- assigning a predetermined number of resource element (RE) subsets for the downlink control channel, among a plurality of RE subsets in the one or more RBs;
mapping REs included in the predetermined number of RE subsets to the downlink control channel in increasing order of first a subcarrier index and then a symbol index; and
transmitting the downlink control channel to a user equipment (UE),wherein the plurality of RE subsets are defined using REs included in the one or more RBs except for REs reserved for a demodulation reference signal (DMRS) of all antenna ports, on an assumption that any RE reserved for a Cell specific Reference Signal (CRS) or any RE reserved for a Channel Status Information Reference Signal (CSI-RS) does not exist.
1 Assignment
0 Petitions
Accused Products
Abstract
Disclosed is a method for a base station to transmit a downlink control channel in a wireless communication system. Specifically, the method comprises the steps of: separating each resource block, of which there are at least one, into a preconfigured number of subsets; structuring basic resource allocation units for an downlink control channel as one of the subsets comprised in one or more resource blocks; configuring the basic resource allocation units, the number of which correspond to the aggregation level of the downlink control channel, as transmission resources; and using the transmission resource to transmit the downlink control channel to a terminal.
17 Citations
16 Claims
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1. A method for transmitting a downlink control channel via one or more resource blocks (RBs) at a base station in a wireless communication system, the method comprising:
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assigning a predetermined number of resource element (RE) subsets for the downlink control channel, among a plurality of RE subsets in the one or more RBs; mapping REs included in the predetermined number of RE subsets to the downlink control channel in increasing order of first a subcarrier index and then a symbol index; and transmitting the downlink control channel to a user equipment (UE), wherein the plurality of RE subsets are defined using REs included in the one or more RBs except for REs reserved for a demodulation reference signal (DMRS) of all antenna ports, on an assumption that any RE reserved for a Cell specific Reference Signal (CRS) or any RE reserved for a Channel Status Information Reference Signal (CSI-RS) does not exist. - View Dependent Claims (2, 3, 4)
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5. A base station in a wireless communication system, the base station comprising:
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a radio frequency (RF) unit; and a processor operatively connected to the RF unit and configured to assign a predetermined number of resource element (RE) subsets for a downlink control channel, among a plurality of RE subsets in one or more resource blocks (RBs), map REs included in the predetermined number of RE subsets to the downlink control channel in increasing order of first a subcarrier index and then a symbol index, and transmit the downlink control channel to a user equipment (UE), wherein the plurality of RE subsets are defined using REs included in the one or more RBs except for REs reserved for a demodulation reference signal (DMRS) of all antenna ports, on an assumption that any RE reserved for a Cell specific Reference Signal (CRS) or any RE reserved for a Channel Status Information Reference Signal (CSI-RS) does not exist. - View Dependent Claims (6, 7, 8)
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9. A method for receiving a downlink control channel at a user equipment (UE) in a wireless communication system, the method comprising:
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receiving the downlink control channel from a base station, on predetermined number of resource element (RE) subsets assigned for the downlink control channel among a plurality of RE subsets in one or more resource blocks (RBs), wherein REs included in the predetermined number of RE subsets are mapped to the downlink control channel in increasing order of first a subcarrier index and then a symbol index, wherein the plurality of RE subsets are defined using REs included in the one or more RBs except for REs reserved for a demodulation reference signal (DMRS) of all antenna ports, on an assumption that any RE reserved for a Cell specific Reference Signal (CRS) or any RE reserved for a Channel Status Information Reference Signal (CSI-RS) does not exist. - View Dependent Claims (10, 11, 12)
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13. A user equipment (UE) in a wireless communication system, the UE comprising:
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a radio frequency (RF) unit; and a processor operatively connected to the RF unit and configured to receive a downlink control channel from a base station on predetermined number of resource element (RE) subsets assigned for the downlink control channel among a plurality of RE subsets in one or more resource blocks (RBs), wherein REs included in the predetermined number of RE subsets are mapped to the downlink control channel in increasing order of first a subcarrier index and then a symbol index, wherein the plurality of RE subsets are defined using REs included in the one or more RBs except for REs reserved for a demodulation reference signal (DMRS) of all antenna ports, on an assumption that any RE reserved for a Cell specific Reference Signal (CRS) or any RE reserved for a Channel Status Information Reference Signal (CSI-RS) does not exist. - View Dependent Claims (14, 15, 16)
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Specification