Data transmission method and device
View Patent ↗Embodiments of the present disclosure provide a data transmission method and a terminal. The method includes mapping, by the terminal, a first-stage sidelink control information (SCI) onto a physical sidelink control channel (PSCCH); and transmitting, by the terminal, the PSCCH and associated physical sidelink shared channel (PSSCH). The first-stage SCI includes an indication information of a second-stage SCI for the associated PSSCH transmission that is mapped onto the associated PSSCH.
1. A method for data transmission, comprising:
mapping, by a first terminal, a first-stage sidelink control information (SCI) onto a physical sidelink control channel (PSCCH); and
transmitting, by the first terminal, the PSCCH and associated physical sidelink shared channel (PSSCH),
wherein the first-stage SCI comprises an indication information of a second-stage SCI for the associated PSSCH transmission that is mapped onto the associated PSSCH;
wherein the second-stage SCI is mapped to resource elements (REs) on a demodulation reference signal (DMRS) for PSSCH symbols;
wherein REs on DMRS symbols not mapping the second-stage SCI are reused for mapping PSSCH data transport block (TB).
2. The method according to claim 1 , wherein the first-stage SCI further comprises at least one of the following information:
a time location or duration of the associated PSSCH transmission;
a frequency location or size of the associated PSSCH transmission;
a PSSCH-DMRS pattern comprising a location, a number of symbols, or a pattern index; or
a size or aggregation level of the second-stage SCI.
3. The method according to claim 1 , wherein the second-stage SCI comprises at least one of the following information:
a source identifier used to identify a transmitter terminal; or
a hybrid automatic response request (HARQ) identifier used to identify an exact HARQ process number.
4. The method according to claim 1 , wherein the REs mapping of the second-stage SCI over the DMRS symbols is performed in frequency direction first, then time direction.
5. A terminal, comprising:
a memory storing computer programs;
a transceiver; and
a processor,
wherein the processor is configured to execute the computer programs to:
map a first-stage SCI on a PSCCH; and
control the transceiver to transmit the PSCCH and an associated PSSCH,
wherein the first-stage SCI comprises indication information of a second-stage SCI for the associated PSSCH transmission that is mapped onto the associated PSSCH;
wherein the second-stage SCI is mapped to REs on a DMRS for PSSCH symbols;
wherein REs on DMRS symbols not mapping the second-stage SCI are reused for mapping PSSCH data transport block (TB).
6. The terminal according to claim 5 , wherein the first-stage SCI further comprises at least one of the following information:
a time location or duration of the associated PSSCH transmission;
a frequency location or size of the associated PSSCH transmission;
a PSSCH-DMRS pattern comprising a location, a number of symbols, or a pattern index; or
a size or aggregation level of the second-stage SCI.
7. The terminal according to claim 5 , wherein the second-stage SCI comprises at least one of the following information:
a source identifier used to identify a transmitter terminal; or
a hybrid automatic response request (HARQ) identifier used to identify an exact HARQ process number.
8. The terminal according to claim 5 , wherein the REs mapping of the second-stage SCI over the DMRS symbols is performed in frequency direction first, then time direction.
9. A terminal, comprising:
a memory storing computer programs;
a transceiver; and
a processor,
wherein the processor is configured to execute the computer programs to:
control the transceiver to receive a first-stage SCI transmitted on a PSCCH; and
determine that a second-stage SCI transmitted on an associated PSSCH is based on indication information contained in the first-stage SCI,
wherein the second-stage SCI is used for associated PSSCH reception;
wherein the second-stage SCI is mapped to REs on a DMRS for PSSCH symbols;
wherein REs on DMRS symbols not mapping the second-stage SCI are reused for mapping PSSCH data transport block (TB).
10. The terminal according to claim 9 , wherein the first-stage SCI further comprises at least one of the following information:
a time location or duration of the associated PSSCH transmission;
a frequency location or size of the associated PSSCH transmission;
a PSSCH-DMRS pattern comprising a location, a number of symbols, or a pattern index; or
a size or aggregation level of the second-stage SCI.
11. The terminal according to claim 9 , wherein the second-stage SCI comprises at least one of the following information:
a source identifier used to identify a transmitter terminal; or
a hybrid automatic response request (HARQ) identifier used to identify an exact HARQ process number.
12. The terminal according to claim 9 , wherein the REs mapping of the second-stage SCI over the DMRS symbols is performed in frequency direction first, then time direction.