Data transmission method and device in wireless communication system
A method for mapping uplink data to a physical uplink shared channel (PUSCH) by a user equipment (UE) in a wireless communication system, the method includes receiving a configuration for a UE-specific aperiodic sounding reference signal (SRS) subframe from a base station; and mapping the uplink data to the PUSCH in the UE-specific aperiodic SRS subframe, wherein the UE-specific aperiodic SRS subframe includes a single carrier frequency division multiple access (SC-FDMA) symbol reserved for an aperiodic SRS, wherein the aperiodic SRS is selectively transmitted in the reserved SC-FDMA symbol to the base station, and the aperiodic SRS is transmitted in the reserved SC-FDMA symbol when triggered by the base station, and wherein the uplink data is mapped to SC-FDMA symbols other than the SC-FDMA symbol reserved for the aperiodic SRS in the UE-specific aperiodic SRS subframe in a case when the aperiodic SRS is not transmitted in the reserved SC-FDMA symbol.
1. A method for mapping uplink data to a physical uplink shared channel (PUSCH) by a user equipment (UE) in a wireless communication system, the method comprising:
receiving a configuration for a UE-specific aperiodic sounding reference signal (SRS) subframe from a base station; and
mapping the uplink data to the PUSCH in the UE-specific aperiodic SRS subframe,
wherein the UE-specific aperiodic SRS subframe includes a single carrier frequency division multiple access (SC-FDMA) symbol reserved for an aperiodic SRS,
wherein the aperiodic SRS is selectively transmitted in the reserved SC-FDMA symbol to the base station, and the aperiodic SRS is transmitted in the reserved SC-FDMA symbol when triggered by the base station, and
wherein the uplink data is mapped to SC-FDMA symbols other than the SC-FDMA symbol reserved for the aperiodic SRS in the UE-specific aperiodic SRS subframe in a case when the aperiodic SRS is not transmitted in the reserved SC-FDMA symbol.
2. The method of claim 1 , further comprising transmitting the uplink data to the base station via the UE-specific aperiodic SRS subframe.
3. The method of claim 1 , wherein the UE-specific aperiodic SRS subframe is one of a plurality of UE-specific subframes configured by the configuration.
4. The method of claim 3 , wherein the configuration indicates a periodicity and an offset of the plurality of UE-specific SRS subframes.
5. The method of claim 3 , wherein the configuration is received via a higher layer.
6. The method of claim 1 , wherein the SC-FDMA symbol reserved for the aperiodic SRS is a last SC-FDMA symbol of the UE-specific aperiodic SRS subframe.
7. The method of claim 1 , wherein the PUSCH is subject to rate matching except the SC-FDMA symbol reserved for the aperiodic SRS, and
wherein the rate matching is performed by determining, by the UE, a number of coded modulation symbols.
8. The method of claim 7 , wherein the number of coded modulation symbols is determined based on a number of SC-FDMA symbols per subframe for the PUSCH.
9. The method of claim 8 , wherein the number of SC-FDMA symbols per subframe for the PUSCH is determined based on Equation:
N symb PUSCH-initial =(2·( N symb UL −1)− N SRS )
where N symb UL denotes a number of SC-FDMA symbols in each slot in the UE-specific aperiodic SRS subframe, and N SRS =1.
10. A user equipment (UE) in a wireless communication system, the UE comprising:
a memory;
a transceiver; and
a processor, coupled to the memory and the transceiver,
controls the transceiver to receive a configuration for a UE-specific aperiodic sounding reference signal (SRS) subframe from a base station, and
maps uplink data to a physical uplink shared channel (PUSCH) in the UE-specific aperiodic SRS subframe,
wherein the UE-specific aperiodic SRS subframe includes a single carrier frequency division multiple access (SC-FDMA) symbol reserved for an aperiodic SRS,
wherein the aperiodic SRS is selectively transmitted in the reserved SC-FDMA symbol to the base station, and the aperiodic SRS is transmitted in the reserved SC-FDMA symbol when triggered by the base station, and
wherein the uplink data is mapped to SC-FDMA symbols other than the SC-FDMA symbol reserved for the aperiodic SRS in the UE-specific aperiodic SRS subframe in a case when the aperiodic SRS is not transmitted in the reserved SC-FDMA symbol.
11. The UE of claim 10 , wherein the processor further controls the transceiver to transmit the uplink data to the base station via the UE-specific aperiodic SRS subframe.
12. The UE of claim 10 , wherein the UE-specific aperiodic SRS subframe is one of a plurality of UE-specific subframes configured by the configuration.
13. The UE of claim 12 , wherein the configuration indicates a periodicity and an offset of the plurality of UE-specific SRS subframes.
14. The UE of claim 12 , wherein the configuration is received via a higher layer.
15. The UE of claim 10 , wherein the SC-FDMA symbol reserved for the aperiodic SRS is a last SC-FDMA symbol of the UE-specific aperiodic SRS subframe.
16. The UE of claim 10 , wherein the PUSCH is subject to rate matching except the SC-FDMA symbol reserved for the aperiodic SRS, and
wherein the rate matching is performed by determining, by the UE, a number of coded modulation symbols.
17. The UE of claim 16 , wherein the number of coded modulation symbols is determined based on a number of SC-FDMA symbols per subframe for the PUSCH.
18. The UE of claim 17 , wherein the number of SC-FDMA symbols per subframe for the PUSCH is determined based on Equation:
N symb PUSCH-initial =(2·( N symb UL −1)− N SRS )
where N symb UL denotes a number of SC-FDMA symbols in each slot in the UE-specific aperiodic SRS subframe, and N SRS =1.