Two-stage sidelink control information for sidelink communications
A method of two-stage sidelink control information (SCI) can include receiving a transport block, and transmitting from a transmission user equipment (Tx UE) to a reception user equipment (Rx UE) the transport block with two-stage SCI including a 1st-stage SCI and a 2nd-stage SCI. The 1st-stage SCI can be transmitted over a physical sidelink control channel (PSCCH). The 2nd-stage SCI and the transport block can share resources of a physical sidelink shared channel (PSSCH). The 2nd-stage SCI and the transport block can share a demodulation reference signal (DMRS).
1. A method, comprising:
receiving a transport block; and
transmitting from a transmission user equipment (Tx UE) to a reception user equipment (Rx UE) the transport block with two-stage sidelink control information (SCI) including a 1st-stage SCI and a 2nd-stage SCI, wherein
the 1st-stage SCI is transmitted over a physical sidelink control channel (PSCCH), wherein the 1st-stage SCI includes information of antenna port(s) used for transmission of the PSSCH,
the 2nd-stage SCI and the transport block share resources of a physical sidelink shared channel (PSSCH), and
the 2nd-stage SCI and the transport block share a demodulation reference signal (DMRS).
2. The method of claim 1 , wherein the transmitting from the Tx UE to the Rx UE the transport block with two-stage SCI includes:
transmitting the 2nd-stage SCI and the transport block using a same transmission scheme with same one or more antenna ports.
3. The method of claim 1 , wherein the transmitting from the Tx UE to the Rx UE the transport block with two-stage SCI includes:
applying polar coding to the 2nd-stage SCI.
4. The method of claim 1 , wherein the 1st-stage SCI includes fields for determining a time-frequency location of the 2nd-stage SCI.
5. The method of claim 1 , further comprising:
performing resource element (RE) mapping of the 2nd-stage SCI over resources of the PSSCH first in frequency domain and then in time domain.
6. The method of claim 1 , wherein the 1st-stage SCI indicates a modulation and coding scheme (MCS) for transmission of the transport block.
7. The method of claim 6 , further comprising:
determining a resource size of the 2nd-stage SCI based on the indicated MCS for transmission of the transport block.
8. The method of claim 1 , wherein the 1st-stage SCI and the 2nd-stage SCI are multiplexed in different symbols in time domain or in different physical resource blocks in frequency domain.
9. The method of claim 1 , wherein the 1st-stage SCI includes a field indicating whether a DMRS for the 1st-stage SCI is quasi-co-located (QCLed) with the 2nd-stage SCI and the transport block transmitted over the PSSCH.
10. An apparatus, comprising circuitry configured to:
receive a transport block; and
transmit from a transmission user equipment (Tx UE) to a reception user equipment (Rx UE) the transport block with two-stage sidelink control information (SCI) including a 1st-stage SCI and a 2nd-stage SCI, wherein
the 1st-stage SCI is transmitted over a physical sidelink control channel (PSCCH), wherein the 1st-stage SCI includes information of antenna port(s) used for transmission of the PSSCH,
the 2nd-stage SCI and the transport block share resources of a physical sidelink shared channel (PSSCH), and
the 2nd-stage SCI and the transport block share a demodulation reference signal (DMRS).
11. The apparatus of claim 10 , wherein the circuitry is further configured to:
transmit the 2nd-stage SCI and the transport block using a same transmission scheme with same one or more antenna ports.
12. The apparatus of claim 10 , wherein the circuitry is further configured to:
applying polar coding to the 2nd-stage SCI.
13. The apparatus of claim 10 , wherein the 1st-stage SCI includes fields for determining a time-frequency location of the 2nd-stage SCI.
14. The apparatus of claim 10 , wherein the circuitry is further configured to:
perform resource element (RE) mapping of the 2nd-stage SCI over resources of the PSSCH first in frequency domain and then in time domain.
15. The apparatus of claim 10 , wherein the 1st-stage SCI indicates a modulation and coding scheme (MCS) for transmission of the transport block.
16. The apparatus of claim 15 , wherein the circuitry is further configured to:
determine a resource size of the 2nd-stage SCI based on the indicated MCS for transmission of the transport block.
17. The apparatus of claim 10 , wherein the 1st-stage SCI and the 2nd-stage SCI are multiplexed in different symbols in time domain or in different physical resource blocks in frequency domain.
18. The apparatus of claim 10 , wherein the 1st-stage SCI includes a field indicating whether a DMRS for the 1st-stage SCI is quasi-co-located (QCLed) with the 2nd-stage SCI and the transport block transmitted over the PSSCH.
19. A non-transitory computer-readable medium storing instructions that, when executed by a processor, causing the processor to perform a method, the method comprising:
receiving a transport block; and
transmitting from a transmission user equipment (Tx UE) to a reception user equipment (Rx UE) the transport block with two-stage sidelink control information (SCI) including a 1st-stage SCI and a 2nd-stage SCI, wherein
the 1st-stage SCI is transmitted over a physical sidelink control channel (PSCCH), wherein the 1st-stage SCI includes information of antenna port(s) used for transmission of the PSSCH,
the 2nd-stage SCI and the transport block share resources of a physical sidelink shared channel (PSSCH), and
the 2nd-stage SCI and the transport block share a demodulation reference signal (DMRS).