Multiplexing sidelink-synchronization signal block (S-SSB) and physical sidelink control channel/physical sidelink shared channel (PSCCH/PSCCH) and fulfilment of occupancy channel bandwidth (OCB) for new radio-unlicensed (NR-U) sidelink
Wireless communications systems and methods related to multiplexing a sidelink-synchronization signal block (S-SSB) transmission with a physical sidelink control channel (PSCCH)/physical sidelink shared channel (PSSCH) transmission for occupancy channel bandwidth (OCB) fulfilment are provided. A user equipment (UE) determines a multiplex configuration for multiplexing a sidelink transmission with a S-SSB transmission in a sidelink bandwidth part (BWP). The UE communicates, in the sidelink BWP during a sidelink slot, the S-SSB transmission. The UE communicates, in the sidelink BWP during the sidelink slot, the sidelink transmission, where the S-SSB transmission and the sidelink transmission are communicated by multiplexing the sidelink transmission and the S-SSB transmission based on the multiplex configuration.
1 . A method of wireless communication performed by a user equipment (UE), the method comprising:
determining a multiplex configuration for multiplexing a sidelink transmission with a sidelink-synchronization signal block (S-SSB) transmission in a sidelink bandwidth part (BWP);
communicating, in the sidelink BWP during a sidelink slot, the S-SSB transmission; and
communicating, in the sidelink BWP during the sidelink slot, the sidelink transmission, wherein the communicating the S-SSB transmission and the communicating the sidelink transmission includes multiplexing the sidelink transmission and the S-SSB transmission based on the multiplex configuration.
2 . The method of claim 1 , wherein the communicating the S-SSB transmission comprises:
communicating the S-SSB transmission at an offset from a lowest frequency of the sidelink BWP based on a synchronization raster.
3 . The method of claim 1 , wherein the communicating the S-SSB transmission comprises:
communicating the S-SSB transmission aligned to a lowest frequency of the sidelink BWP.
4 . The method of claim 1 , wherein the communicating the sidelink transmission comprises:
communicating at least of a physical sidelink control channel (PSCCH) transmission or a physical sidelink shared channel (PSSCH) transmission.
5 . The method of claim 4 , wherein the communicating the sidelink transmission further comprises:
communicating the sidelink transmission in a first frequency interlace within the sidelink BWP, the PSCCH transmission and the PSSCH transmission being multiplexed in at least one of time or frequency.
6 . The method of claim 5 , wherein the first frequency interlace includes a plurality of resource blocks (RBs) spaced apart from each other by at least one other RB in the sidelink BWP, and wherein the communicating the sidelink transmission further comprises:
communicating the PSCCH transmission in a lowest frequency RB and a highest frequency RB of the plurality of RBs; and
communicating the PSSCH transmission in one or more remaining RBs of the plurality of RBs.
7 . The method of claim 5 , wherein the first frequency interlace includes a plurality of resource blocks (RBs) spaced apart from each other by at least one other RBs in the sidelink BWP, and wherein the communicating the sidelink transmission further comprises:
communicating the sidelink transmission in a subset of the plurality of RBs excluding at least a lowest frequency RB of the plurality of RBs based on the S-SSB transmission being aligned to a lowest frequency of the sidelink BWP.
8 . The method of claim 7 , wherein the communicating the sidelink transmission further comprises:
communicating the PSCCH transmission in a lowest frequency RB and a highest frequency RB of the subset of the plurality of RBs; and
communicating the PSSCH transmission in one or more remaining RBs of subset of the plurality of RBs,
wherein the method further comprises:
monitoring for sidelink control information (SCI) during the sidelink slot, the monitoring comprising:
performing blind decoding in the lowest frequency RB and the highest frequency RB of the subset of the plurality of RBs; and
performing blind decoding in a lowest frequency RB and a highest frequency RB of the plurality of RBs.
9 . The method of claim 5 , further comprising:
puncturing the PSSCH transmission based on the S-SSB transmission.
10 . The method of claim 5 , further comprising:
rate-matching the PSSCH transmission based on the S-SSB transmission.
11 . The method of claim 10 , wherein the communicating the sidelink transmission further comprises:
communicating, in the PSCCH transmission, sidelink control information (SCI) including rate-matching information for the PSSCH transmission.
12 . The method of claim 5 , wherein:
the communicating the S-SSB transmission comprises:
transmitting the S-SSB transmission, and
the communicating the sidelink transmission comprises:
transmitting at least one of a channel state information-reference signal (CSI-RS) or sidelink data in the first frequency interlace, the sidelink transmission multiplexed with the S-SSB transmission based an occupancy channel bandwidth (OCB) parameter.
13 . The method of claim 5 , wherein:
the communicating the S-SSB transmission comprises:
receiving the S-SSB transmission, and
wherein the communicating the sidelink transmission comprises:
receiving at least one of a channel state information-reference signal (CSI-RS) or sidelink data in the first frequency interlace.
14 . The method of claim 4 , wherein the communicating the sidelink transmission comprises:
communicating the PSCCH transmission and the PSSCH transmission in a first subchannel within the sidelink BWP non-overlapping with a frequency resource used for the S-SSB transmission, the PSCCH transmission and the PSSCH transmission being multiplexed in time.
15 . The method of claim 14 , further comprising:
determining whether to select a first resource pool including a plurality of frequency interlaces in the sidelink BWP or a second resource pool including a plurality of subchannels in the sidelink BWP for communicating the sidelink transmission in the sidelink slot based on whether the sidelink slot is configured for the S-SSB transmission, the plurality of subchannels including the first subchannel.
16 . The method of claim 15 , further comprising:
monitoring for sidelink control information (SCI) in the PSCCH transmission within the first subchannel in the second resource pool based on the sidelink slot being configured for the S-SSB transmission.
17 . The method of claim 15 , further comprising:
monitoring, for first sidelink control information (SCI) during a further sidelink slot different from the sidelink slot, the monitoring comprising performing blind decoding in at least one of the first resource pool or the second resource pool.
18 . The method of claim 15 , further comprising:
selecting the first subchannel from the plurality of subchannels for communicating the sidelink transmission based on an occupancy channel bandwidth (OCB) parameter.
19 . The method of claim 18 , wherein the selecting the first subchannel comprises:
prioritizing the first subchannel over a second subchannel of the plurality of subchannels for communicating the sidelink transmission based on the first subchannel being at a higher frequency than the second subchannel.
20 . A user equipment (UE) comprising:
a processor configured to:
determine a multiplex configuration for multiplexing a sidelink transmission with a sidelink-synchronization signal block (S-SSB) transmission in a sidelink bandwidth part (BWP); and
a transceiver configured to:
communicate, in the sidelink BWP during a sidelink slot, the S-SSB transmission; and
communicate, in the sidelink BWP during the sidelink slot, the sidelink transmission, wherein the transceiver configured to communicate the S-SSB transmission and the sidelink transmission is configured to multiplex the sidelink transmission and the S-SSB transmission based on the multiplex configuration.
21 . The UE of claim 20 , wherein the transceiver configured to communicate the S-SSB transmission is configured to:
communicate the S-SSB transmission at an offset from a lowest frequency of the sidelink BWP based on a synchronization raster.
22 . The UE of claim 20 , wherein the transceiver configured to communicate the S-SSB transmission is configured to:
communicate the S-SSB transmission aligned to a lowest frequency of the sidelink BWP.
23 . The UE of claim 20 , wherein the transceiver configured to communicate the sidelink transmission is configured to:
communicate at least of a physical sidelink control channel (PSCCH) transmission or a physical sidelink shared channel (PSSCH) transmission.
24 . The UE of claim 23 , wherein the transceiver configured to communicate the sidelink transmission is configured to:
communicate the sidelink transmission in a first frequency interlace within the sidelink BWP, the PSCCH transmission and the PSSCH transmission being multiplexed in at least one of time or frequency, and wherein the first frequency interlace includes a plurality of resource blocks (RBs) spaced apart from each other by at least one other RB in the sidelink BWP, and wherein the transceiver configured to communicate the sidelink transmission is configured to:
communicate the PSCCH transmission in a lowest frequency RB and a highest frequency RB of the plurality of RBs; and
communicate the PSSCH transmission in one or more remaining RBs of the plurality of RBs.
25 . The UE of claim 24 , wherein the first frequency interlace includes a plurality of resource blocks (RBs) spaced apart from each other by at least one other RBs in the sidelink BWP, and wherein the transceiver configured to communicate the sidelink transmission is configured to:
communicate the sidelink transmission in a subset of the plurality of RBs excluding at least a lowest frequency RB of the plurality of RBs based on the S-SSB transmission being aligned to a lowest frequency of the sidelink BWP.
26 . The UE of claim 25 , wherein the transceiver configured to communicate the sidelink transmission is configured to:
communicate the PSCCH transmission in a lowest frequency RB and a highest frequency RB of the subset of the plurality of RBs; and
communicate the PSSCH transmission in one or more remaining RBs of subset of the plurality of RBs, and
wherein the processor is further configured to:
monitor for sidelink control information (SCI) during the sidelink slot, the monitoring comprising:
performing blind decoding in the lowest frequency RB and the highest frequency RB of the subset of the plurality of RBs; and
performing blind decoding in a lowest frequency RB and a highest frequency RB of the plurality of RBs.
27 . The UE of claim 24 , wherein the processor is further configured to:
puncture the PSSCH transmission based on the S-SSB transmission.
28 . The UE of claim 24 , wherein the processor is further configured to:
rate-match the PSSCH transmission based on the S-SSB transmission,
wherein the transceiver configured to communicate the sidelink transmission is configured to:
communicate, in the PSCCH transmission, sidelink control information (SCI) including rate-matching information for the PSSCH transmission.
29 . The UE of claim 24 , wherein:
the transceiver configured to communicate the S-SSB transmission is configured to:
transmit the S-SSB transmission, and
the transceiver configured to communicate the sidelink transmission is configured to:
transmit at least one of a channel state information-reference signal (CSI-RS) or sidelink data in the first frequency interlace, the sidelink transmission multiplexed with the S-SSB transmission based an occupancy channel bandwidth (OCB) parameter.
30 . The UE of claim 24 , wherein:
the transceiver configured to communicate the S-SSB transmission is configured to:
receive the S-SSB transmission, and
the transceiver configured to communicate the sidelink transmission is configured to:
receive at least one of a channel state information-reference signal (CSI-RS) or sidelink data in the first frequency interlace.
31 . The UE of claim 23 , wherein the transceiver configured to communicate the sidelink transmission is configured to:
communicate the PSCCH transmission and the PSSCH transmission in a first subchannel within the sidelink BWP non-overlapping with a frequency resource used for the S-SSB transmission, the PSCCH transmission and the PSSCH transmission being multiplexed in time.
32 . The UE of claim 31 , wherein the processor is further configured to:
determine whether to select a first resource pool including a plurality of frequency interlaces in the sidelink BWP or a second resource pool including a plurality of subchannels in the sidelink BWP for communicating the sidelink transmission in the sidelink slot based on whether the sidelink slot is configured for the S-SSB transmission, the plurality of subchannels including the first subchannel.
33 . The UE of claim 32 , wherein the processor is further configured to:
monitor for sidelink control information (SCI) in the PSCCH transmission within the first subchannel in the second resource pool based on the sidelink slot being configured for the S-SSB transmission.
34 . The UE of claim 32 , wherein the processor is further configured to:
monitor, for first sidelink control information (SCI) during a further sidelink slot different from the sidelink slot, the monitoring comprising performing blind decoding in at least one of the first resource pool or the second resource pool.
35 . The UE of claim 32 , wherein the processor is further configured to:
select the first subchannel from the plurality of subchannels for communicating the sidelink transmission based on an occupancy channel bandwidth (OCB) parameter, and wherein the processor configured to select the first subchannel is configured to:
prioritize the first subchannel over a second subchannel of the plurality of subchannels for communicating the sidelink transmission based on the first subchannel being at a higher frequency than the second subchannel.