Method for transceiving data in unlicensed band and apparatus for same
The present invention relates to a wireless communication system, and more particularly, to a method for transceiving data in an unlicensed band and an apparatus for same. In particular, disclosed in the present invention are a method and an apparatus for same, the method comprising: a terminal receiving, from a base station, listen before talk (LBT)-type information and information relating to an uplink data transmission interval during which the data is transmitted from within one subframe; and transmitting the data to the base station only during the uplink data transmission interval from within the one subframe, based on an LBT operation indicated by the LBT-type information, thereby efficiently transceiving data between the terminal and the base station in the unlicensed band.
1. A method for transmitting an uplink signal by a user equipment in a wireless communication system, the method comprising:
receiving, from a base station, downlink control information (DCI) scheduling the uplink signal, wherein the DCI comprises channel sensing operation type information and information related to an uplink signal transmission period, and
wherein the channel sensing operation type information indicates one of a plurality of predetermined channel sensing operation types;
based on that the channel sensing operation type information indicates a first type channel sensing operation:
performing the first type channel sensing operation; and
based on the first type channel sensing operation, transmitting, to the base station, the uplink signal in the uplink signal transmission period;
based on that the channel sensing operation type information indicates a second type channel sensing operation:
performing the second type channel sensing operation; and
based on the second type channel sensing operation, transmitting, to the base station, the uplink signal in the uplink signal transmission period,
wherein the channel sensing operation type information comprises at least one bit,
wherein one of the plurality of predetermined channel sensing operation types is indicated based on the at least one bit,
wherein the at least one bit with a first value is mapped to the first type channel sensing operation, and
wherein the at least one bit with a second value is mapped to the second type channel sensing operation.
2. The method of claim 1 , wherein the plurality of predetermined channel sensing operation types comprises:
the first type channel sensing operation type related to performing channel sensing operation based on random back-off, and
the second type channel sensing operation related to performing channel sensing operation based on a clean channel assessment (CCA) result value after CCA is performed in a predetermined time.
3. The method of claim 2 , wherein based on that the channel sensing operation type information indicates the first type channel sensing operation, the DCI further comprises information on identifying a priority class among a plurality of priority classes, and
wherein a parameter value configured for the first type channel sensing operation is identified based on the priority class.
4. The method of claim 3 , wherein the parameter value comprises at least one of a defer period length, a minimum contention window size (CWS), a maximum contention window size, or maximum channel occupancy time (MCOT).
5. The method of claim 1 , wherein the information related to the uplink signal transmission period comprises starting position information on a starting position in a subframe of the uplink signal transmission period.
6. The method of claim 5 , wherein the starting position information is one among a plurality of positional information,
wherein the plurality of positional information comprises:
a start position of a symbol #0 of the subframe,
a start position of a symbol #1 of the subframe,
timing after 25μ from the start position of the symbol #0 of the subframe, and timing after 25μ+TA (timing advance) applied to the user equipment from the start position of the symbol #0 of the subframe, and
wherein the subframe comprises symbols from the symbol #0 to a symbol #13.
7. The method of claim 5 , wherein the channel sensing operation type information and the starting position information are jointly coded.
8. The method of claim 5 , wherein the information on the uplink signal transmission period further comprises transmission gap configuration information on the transmission of the uplink signal restricted in N number of contiguous symbols with a last symbol in time domain among a plurality of symbols included in the subframe, where N denotes an integer greater than or equal to zero.
9. The method of claim 1 , wherein the information on the uplink signal transmission period comprises:
first transmission gap configuration information on the transmission of the uplink signal restricted in M number of contiguous symbols with a 1 st symbol in time domain among a plurality of symbols included in the subframe, where M denotes an integer greater than or equal to zero, and
second transmission gap configuration information on the transmission of the uplink signal restricted in N number of contiguous symbols with a last symbol in time domain among a plurality of symbols included in the subframe, where N denotes an integer greater than or equal to zero.
10. The method of claim 1 ,
wherein the first type channel sensing operation and the second channel sensing operation are performed during a period in a subframe which is different from the uplink data transmission period in the subframe, respectively.
11. A method for receiving an uplink signal by a base station in a wireless communication system, the method comprising:
transmitting, to a user equipment, downlink control information (DCI) scheduling the uplink signal, wherein the DCI comprises channel sensing operation type information and information related to an uplink signal transmission period,
wherein the channel sensing operation type information indicates one of a plurality of predetermined channel sensing operation types; and
based on that the channel sensing operation type information indicates a first type channel sensing operation, receiving, from the user equipment, the uplink signal in the uplink transmission period based on the first type channel sensing operation performed by the user equipment, and
based on that the channel sensing operation type information indicates a second type channel sensing operation, receiving, from the user equipment, the uplink signal in the uplink transmission period based on the second type channel sensing operation performed by the user equipment,
wherein the channel sensing operation type information comprises at least one bit,
wherein one of the plurality of predetermined channel sensing operation types is indicated based on the at least one bit,
wherein the at least one bit with a first value is mapped to the first type channel sensing operation, and
wherein the at least one bit with a second value is mapped to the second type channel sensing operation.
12. A user equipment for transmitting an uplink signal in a wireless communication system, the user equipment comprising:
a memory; and
at least one processor coupled with the memory and configured to:
receive, from a base station, downlink control information (DCI) scheduling the uplink signal,
wherein the DCI comprises channel sensing operation type information and information related to an uplink signal transmission period, and
wherein the channel sensing operation type information indicates one of a plurality of predetermined channel sensing operation types;
based on that the channel sensing operation type information indicates a first type channel sensing operation:
perform the first type channel sensing operation; and
based on the first type channel sensing operation, transmit, to the base station, the uplink signal in the uplink signal transmission period;
based on that the channel sensing operation type information indicates a second type channel sensing operation:
perform the second type channel sensing operation; and
based on the second type channel sensing operation, transmit, to the base station, the uplink signal in the uplink signal transmission period,
wherein the channel sensing operation type information comprises at least one bit,
wherein one of the plurality of predetermined channel sensing operation types is indicated based on the at least one bit,
wherein the at least one bit with a first value is mapped to the first type channel sensing operation, and
wherein the at least one bit with a second value is mapped to the second type channel sensing operation.
13. The user equipment of claim 12 , wherein the information related to the uplink signal transmission period comprises starting position information on a starting position, in a subframe of the uplink signal transmission period.
14. The user equipment of claim 13 , wherein the starting position information is one among a plurality of positional information,
wherein the plurality of positional information comprises:
a start position of a symbol #0 of the subframe,
a start position of a symbol #1 of the subframe,
timing after 25μ from the start position of the symbol #0 of the subframe, and timing after 25μ+TA (timing advance) applied to the user equipment from the start position of the symbol #0 of the subframe, and
wherein the subframe comprises symbols from the symbol #0 to a symbol #13.
15. A base station for receiving an uplink signal in a wireless communication system, the base station comprising:
a memory; and
at least one processor coupled with the memory and configured to:
transmit, to a user equipment, downlink control information (DCI) scheduling the uplink signal,
wherein the DCI comprises channel sensing operation type information and information related to an uplink signal transmission period,
wherein the channel sensing operation type information indicates one of a plurality of predetermined channel sensing operation types; and
based on that the channel sensing operation type information indicates a first type channel sensing operation, receive, from the user equipment, the uplink signal in the uplink transmission period based on the first type channel sensing operation performed by the user equipment, and
based on that the channel sensing operation type information indicates a second type channel sensing operation, receive, from the user equipment, the uplink signal in the uplink transmission period based on the second type channel sensing operation performed by the user equipment,
wherein the channel sensing operation type information comprises at least one bit,
wherein one of the plurality of predetermined channel sensing operation types is indicated based on the at least one bit,
wherein the at least one bit with a first value is mapped to the first type channel sensing operation, and
wherein the at least one bit with a second value is mapped to the second type channel sensing operation.