Method and apparatus for performing transmission
Embodiments of the present disclosure provide a method of performing transmission between a base station and a terminal device according to a frame structure over an unlicensed spectrum in a wireless network that supports communications over both a licensed spectrum and the unlicensed spectrum. The method comprises signaling information indicating the frame structure and performing transmission between the base station and the terminal device on an unlicensed carrier in the unlicensed spectrum according to the frame structure. There is also provided the corresponding apparatus.
1. A method performed by a base station, the method comprising:
transmitting first information to a user equipment (UE);
determining second information,
wherein the first information indicates a start position and a duration of a Physical Uplink Control Channel (PUCCH) transmission, and the second information indicates a time duration of an uplink transmission that is performed based on a channel access procedure, wherein the time duration starts after a first channel is sensed to be idle and after a reserved time duration, and wherein the time duration is a duration of time that precedes the start position of the PUCCH transmission; and
receiving the PUCCH transmission and the uplink transmission on the first channel.
2. The method according to claim 1 , wherein the first information indicates the start position in terms of a symbol in time domain.
3. The method according to claim 1 , further comprising transmitting third information indicating first n symbols in a subframe occupied by a downlink transmission, wherein other symbols in the subframe are not occupied.
4. The method according to claim 3 , wherein the third information is transmitted by using a downlink control information (DCI) format.
5. A base station comprising:
a transceiver configured to:
transmit first information to a user equipment (UE);
determine second information,
wherein the first information indicates a start position and a duration of a Physical Uplink Control Channel (PUCCH) transmission, and the second information indicates a time duration of an uplink transmission that is performed based on a channel access procedure, wherein the time duration starts after a first channel is sensed to be idle and after a reserved time duration, and wherein the time duration is a duration of time that precedes the start position of the PUCCH transmission; and
receive the PUCCH transmission and the uplink transmission on the first channel.
6. The base station according to claim 5 , wherein the first information indicates the start position in terms of a symbol in time domain.
7. The base station according to claim 5 , wherein the transceiver is further configured to transmit third information indicating first n symbols in a subframe occupied by a downlink transmission, wherein other symbols in the subframe are not occupied.
8. A method performed by a user equipment (UE), the method comprising:
receiving first information from a base station;
determining second information,
wherein the first information indicates a start position and a duration of a Physical Uplink Control Channel (PUCCH) transmission, and the second information indicates a time duration of an uplink transmission that is performed based on a channel access procedure, wherein the time duration starts after a first channel is sensed to be idle and after a reserved time duration, and wherein the time duration is a duration of time that precedes the start position of the PUCCH transmission; and
performing the PUCCH transmission and the uplink transmission on the first channel.
9. The method according to claim 8 , wherein the first information indicates the start position in terms of a symbol in time domain.
10. The method according to claim 8 , further comprising receiving third information indicating first n symbols in a subframe occupied by a downlink transmission, wherein other symbols in the subframe are not occupied.