Method and apparatus for transmitting and receiving downlink control channel in wireless communication system
AssigneeSamsung Electronics Co., Ltd.
InventorsTae-Hyoung Kim, Yong-Jun Kwak, Dong-Han Kim, Young-Bum Kim, Seung-Hoon Choi
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Abstract
Disclosed is a 5G or a pre-5G communication system provided to support a higher data transmission rate than a 4G communication system such as LTE. A method and an apparatus are provided for transmitting and receiving a downlink control channel in a wireless communication system. The method includes transmitting, on a first resource region, a detection signal indicating that a downlink control channel is transmitted; and transmitting a signal of the downlink control channel on a search space related to the first resource region.
Claims16
A method of transmitting a downlink control channel in a wireless communication system, the method comprising:
- setting a length of a detection sequence based on an aggregation level for the downlink control channel;
- generating a first detection signal including the detection sequence;
- transmitting, on a first resource region, the first detection signal indicating that the downlink control channel is transmitted, among a plurality of detection signals;
- allocating the downlink control channel to a resource based on the first resource region;
- and
- transmitting a signal of the downlink control channel on the resource in a search space,
- wherein the length of the detection sequence is set to be long for a high aggregation level of the downlink control channel, and is set to be short for a low aggregation level of the downlink control channel.
A method of receiving a downlink control channel in a wireless communication system, the method comprising:
- determining whether a first detection signal among a plurality of detection signals, which indicates that a downlink control channel is transmitted, is received on a first resource region from a base station;
- and
- when the detection signal is determined as being receive on the first resource region, performing blind decoding of the downlink control channel received on a resource in a search space, the resource determined based on the first resource region,
- wherein each of the plurality of detection signals includes a detection sequence, which is set by the based station based on an aggregation level for the downlink control channel, and
- wherein the length of the detection sequence is set to be long for a high aggregation level of the downlink control channel, and is set to be short for a low aggregation level of the downlink control channel.
An apparatus of a base station that transmits a downlink control channel in a wireless communication system, the apparatus comprising:
- a transceiver;
- and
- a processor configured to:
- set a length of a detection sequence based on an aggregation level for the downlink control channel,
- generate a first detection signal including the detection sequence,
- control the transceiver to transmit the first detection signal indicating that a downlink control channel is transmitted, among a plurality of detection signals, on a first resource region,
- allocate the downlink control channel to a resource based on the first resource region,
- generate a signal of the downlink control channel, and
- control the transceiver to transmit the downlink control channel on the resource in a search space,
- wherein the length of the detection sequence is set to be long for a high aggregation level of the downlink control channel, and is set to be short for a low aggregation level of the downlink control channel.
An apparatus of a user equipment (UE) that receives a downlink control channel in a wireless communication system, the apparatus comprising:
- a transceiver configured to receive a signal on a radio channel;
- and
- a processor configured to:
- determine whether a first detection signal among a plurality of detection signals, which indicates that a downlink control channel is transmitted, is received on a first resource region based on the received signal from a base station, and
- when the detection signal is determined as being received on the first resource region, perform blind decoding of the downlink control channel received on a resource in a search space, the resource being determined based on the first resource region, wherein each of the plurality of detection signals includes a detection sequence which is set by the based station based on an aggregation level for the downlink control channel, and
- wherein the length of the detection sequence is set to be long for a high aggregation level of the downlink control channel, and is set to be short for a low aggregation level of the downlink control channel.
Dependencies are inferred from the claim text.