Method and device for radio resource allocation in wireless communication system
The present disclosure relates to a pre-5th-Generation (5G) or 5G communication system to be provided for supporting higher data rates Beyond 4th-Generation (4G) communication system such as Long Term Evolution (LTE). An operation method of a base station in a radio communication system and an apparatus therefor are provided. The operation method includes transmitting, to a terminal, configuration information including a configuration of a bandwidth part in an unlicensed spectrum, the bandwidth part including a plurality of subbands, performing a channel access procedure for each of the plurality of subbands included in the bandwidth part, initiating channel access via at least one subband, among the plurality of subbands, determined to be an idle channel according to a result of the channel access procedure, transmitting, to the terminal, the result of the channel access procedure for each subband, among the plurality of subbands, and transmitting, to the terminal, a data channel according to the result of the channel access procedure for each subband, among the plurality of subbands.
1. A method for operating base station (BS) in wireless communication system, the method comprising;
obtaining a result of a listen before talk (LBT) procedure for a plurality of subbands by identifying that each of the plurality of subbands is available to be occupied or not; and
transmitting, to a user equipment (UE), information indicating the result of the LBT procedure and occupancy time of the each of the plurality of subbands,
wherein the occupancy time starts from a first symbol of a slot which the information is received by the UE,
wherein the information including a bitmap,
wherein a subband of the plurality of subbands is available to be occupied if each bit of the bitmap is ‘1’, and
wherein a subband of the plurality of subbands is not available to be occupied if each bit of the bitmap is ‘0’.
2. The method of claim 1 , wherein the information is transmitted on PDCCH.
3. The method of claim 1 , wherein the result of the LBT procedure includes time domain validity to indicate information of time for occupying channel.
4. The method of claim 1 , further comprising:
transmitting, to the UE, a data channel according to the result of the LBT procedure for each of the plurality of subbands.
5. The method of claim 1 , further comprising:
transmitting, to the UE, DCI for scheduling of uplink/downlink data channel transmission/reception.
6. The method of claim 3 , wherein the information indicating the result of the LBT procedure include the time domain validity.
7. A method for operating user equipment (UE) in wireless communication system, the method comprising;
receiving, from a base station (BS), information indicating a result of a listen before talk (LBT) procedure and occupancy time of each of a plurality of subbands, wherein the occupancy time starts from a first symbol of a slot which the information is received by the UE; and
identifying the information including a bitmap,
wherein a subband of the plurality of subbands is available to be occupied if each bit of the bitmap is ‘1’, and
wherein a subband of the plurality of subbands is not available to be occupied if each bit of the bitmap is ‘0’.
8. The method of claim 7 , wherein in the identifying of the information including the bitmap, each bit of the bitmap indicates whether a subband is available to be occupied or not based on index of subband set via higher-layer signal.
9. The method of claim 7 , wherein the result of the LBT procedure includes time domain validity to indicate information of time for occupying channel.
10. The method of claim 7 , further comprising:
receiving, from the BS, a data channel according to the result of the LBT procedure for each of the plurality of subbands.
11. The method of claim 7 , further comprising:
receiving, from the BS, DCI for scheduling of uplink/downlink data channel transmission/reception; and
performing uplink data channel transmission/reception according to the scheduling.
12. The method of claim 9 , wherein the information indicating the result of the LBT procedure include the time domain validity.
13. A device of a base station (BS) in wireless communication system, the device comprising;
a transceiver; and
at least one processor coupled with the transceiver;
wherein the at least one processor is configured to:
obtain a result of a listen before talk (LBT) procedure for a plurality of subbands by identifying that each of the plurality of subbands is available to be occupied or not, and
transmit, to a user equipment (UE), information indicating the result of the LBT procedure and occupancy time of the each of the plurality of subbands,
wherein the occupancy time starts from a first symbol of a slot which the information is received by the UE,
wherein the information including a bitmap,
wherein a subband of the plurality of subbands is available to be occupied if each bit of the bitmap is ‘1’, and
wherein a subband of the plurality of subbands is not available to be occupied if each bit of the bitmap is ‘0’.
14. The device of claim 13 , wherein the information is transmitted on PDCCH.
15. The device of claim 13 , wherein the result of the LBT procedure includes time domain validity to indicate information of time for occupying channel.
16. The device of claim 13 , wherein the at least one processor is further configured to:
transmit, to the UE, a data channel according to the result of the LBT procedure for each of the plurality of subbands.
17. The device of claim 13 , wherein the at least one processor is further configured to:
transmit, to the UE, DCI for scheduling of uplink/downlink data channel transmission/reception.
18. The device of claim 15 , wherein the information indicating the result of the LBT procedure includes the time domain validity.