Techniques for scheduling multi-user sidelink communications in multiple time periods
Some aspects described herein relate transmitting a first stage sidelink control information (SCI) that schedules multiple transport blocks (TBs) of shared channel communications in multiple time divisions, wherein each of the multiple TBs is for a different receiving UE of multiple receiving UEs, transmitting, to a first receiving UE of the multiple receiving UEs and based on the first stage SCI, at least a first TB of the multiple TBs of shared channel communications in a first time division of the multiple time divisions, and transmitting, to a second receiving UE of the multiple receiving UEs and based on the first stage SCI, at least a second TB of the multiple TBs of shared channel communications in a second time division of the multiple time divisions. Other aspects relate to receiving the first stage SCI and at least one TB.
1 . An apparatus for wireless communication, comprising:
a transceiver;
a memory configured to store instructions; and
one or more processors communicatively coupled with the memory and the transceiver, wherein the one or more processors are configured to:
transmit a first stage sidelink control information (SCI) that schedules multiple transport blocks (TBs) of shared channel communications in multiple time divisions, wherein each of the multiple TBs is for a different receiving UE of multiple receiving UEs;
transmit one or more second stage SCIs including separate SCI for each of the multiple receiving UEs;
transmit, to a first receiving UE of the multiple receiving UEs and based on the first stage SCI and the one or more second stage SCIs, at least a first TB of the multiple TBs of shared channel communications in a first time division of the multiple time divisions; and
transmit, to a second receiving UE of the multiple receiving UEs and based on the first stage SCI and the one or more second stage SCIs, at least a second TB of the multiple TBs of shared channel communications in a second time division of the multiple time divisions,
wherein the one or more processors are configured to transmit at least the first TB at least in part by transmitting a first second stage SCI of the one or more second stage SCIs with at least the first TB,
wherein the one or more processors are configured to transmit at least the second TB at least in part by transmitting a second second stage SCI of the one or more second stage SCIs with at least the second TB, and
wherein the one or more processors are configured to transmit the first stage SCI in a slot preceding at least the first TB and at least the second TB.
2 . The apparatus of claim 1 , wherein the one or more processors are further configured to transmit, with the first stage SCI, multiple second stage SCIs for the multiple receiving UEs.
3 . The apparatus of claim 2 , wherein the first stage SCI further indicates at least one of a time domain resource allocation for the multiple TBs, a frequency domain resource allocation for the multiple TBs, a common demodulation reference signal (DMRS) pattern for the multiple TBs, or a priority field for the multiple TBs.
4 . The apparatus of claim 2 , wherein the first stage SCI further indicates at least one of a modulation and coding scheme (MCS) and beta offset for the second stage SCI, or a reserved transmit beam for each of multiple reserved TBs in a future reserved burst.
5 . The apparatus of claim 2 , wherein the multiple second stage SCIs indicate at least one of a destination identifier for each of the multiple receiving UEs, a hybrid automatic repeat/request (HARQ) process identifier for each of the multiple TBs, a separate indication of a modulation and coding scheme (MCS) for each of the multiple TBs, a sidelink acknowledgement index (SAI) for each of the multiple TBs, a K1 offset or a physical uplink control channel (PUCCH) resource indicator (PRI) value for each of the multiple TBs, or a transmission configuration indicator (TCI) states for each of the multiple TBs.
6 . The apparatus of claim 1 , wherein the one or more processors are configured to transmit at least the first TB at least in part by transmitting the first stage SCI in at least the first TB.
7 . The apparatus of claim 6 , wherein the first second stage SCI indicates at least one of an identifier of the apparatus or transmission configuration indicator (TCI) states for each of the multiple TBs.
8 . The apparatus of claim 1 , wherein the one or more processors are configured to transmit, with the first stage SCI, a common second stage SCI, wherein the common second stage SCI indicates at least one of an identifier of the apparatus or transmission configuration indicator (TCI) states for each of the multiple TBs.
9 . The apparatus of claim 1 , wherein the first stage SCI indicates at least one of a quasi-colocation (QCL) states for each of the multiple TBs, an identifier of a transmitting UE, or a common modulation and coding scheme (MCS) and beta offset for rate matching the second stage SCI in each of the multiple TBs.
10 . The apparatus of claim 1 , wherein the first second stage SCI indicates at least one of first scheduling parameters, a first updated modulation and coding scheme (MCS), or a first K1 offset or first physical uplink control channel (PUCCH) resource indicator (PRI) value, for at least the first TB, and wherein the second second stage SCI indicates at least one of second scheduling parameters, a second updated MCS, or a second K1 offset or second PRI value, for at least the second TB.
11 . An apparatus for wireless communication, comprising:
a transceiver;
a memory configured to store instructions; and
one or more processors communicatively coupled with the memory and the transceiver, wherein the one or more processors are configured to:
receive a first stage sidelink control information (SCI) that schedules multiple transport blocks (TBs) of shared channel communications in multiple time divisions, wherein each of the multiple TBs is for a different receiving UE of multiple receiving UEs;
receive one or more second stage SCIs including separate SCI for each of the multiple receiving UEs; and
receive, based on the first stage SCI and a second stage SCI of the one or more second stage SCIs that is for the apparatus, at least a first TB of the multiple TBs of shared channel communications in a first time division of the multiple time divisions,
wherein the one or more processors are further configured to receive, with the first stage SCI, multiple second stage SCIs for the multiple receiving UEs,
wherein the first stage SCI further indicates at least one of a time domain resource allocation (TDRA) for the multiple TBs, a frequency domain resource allocation (FDRA) for the multiple TBs, a common demodulation reference signal (DMRS) pattern for the multiple TBs, or a priority field for the multiple TBs, and
wherein the one or more processors are configured to receive at least the first TB based at least in part on at least one of the TDRA, the FDRA, the common DMRS pattern, or the priority field.
12 . The apparatus of claim 11 , wherein the first stage SCI further indicates a modulation and coding scheme (MCS) and beta offset for the second stage SCI, and wherein the one or more processors are further configured to rate match the second stage SCI based at least in part on the MCS and beta offset.
13 . The apparatus of claim 11 , wherein the first stage SCI indicates a reserved transmit beam for each of multiple reserved TBs in a future reserved burst.
14 . The apparatus of claim 11 , wherein the multiple second stage SCIs indicate at least one of a destination identifier for each of the multiple receiving UEs, and
wherein the one or more processors are configured to receive at least the first TB based at least in part on the destination identifier associated with at least the first TB in the second stage SCI.
15 . The apparatus of claim 11 , wherein the multiple second stage SCIs indicate a hybrid automatic repeat/request (HARQ) process identifier for each of the multiple TBs, and wherein the one or more processors are further configured to transmit, to a transmitting UE, feedback for the at least the first TB based on the HARQ process identifier.
16 . The apparatus of claim 11 , wherein the multiple second stage SCIs separately indicate a modulation and coding scheme (MCS) for each of the multiple TBs, and
wherein the one or more processors are configured to receive at least the first TB based at least in part on the MCS indicated for the at least the first TB.
17 . The apparatus of claim 11 , wherein the multiple second stage SCIs indicate a sidelink acknowledgement index (SAI) for each of the multiple TBs, and wherein the one or more processors are further configured to transmit, to a transmitting UE, feedback for the at least the first TB based on the SAI.
18 . The apparatus of claim 11 , wherein the multiple second stage SCIs indicate K1 offset or a physical uplink control channel (PUCCH) resource indicator (PRI) value for each of the multiple TBs, and
wherein the one or more processors are configured to receive at least the first TB based at least in part on the K1 offset or PRI indicated for the at least the first TB.
19 . The apparatus of claim 11 , wherein the multiple second stage SCIs indicate transmission configuration indicator (TCI) states for each of the multiple TBs, and
wherein the one or more processors are configured to receive at least the first TB based at least in part on the TCI state indicated for the at least the first TB.
20 . The apparatus of claim 11 , wherein the one or more processors are configured to receive at least the first TB at least in part by receiving the second stage SCI with at least the first TB.
21 . The apparatus of claim 20 , wherein the one or more processors are configured to receive at least the first TB at least in part by receiving the first stage SCI in at least the first TB.
22 . The apparatus of claim 21 , wherein the first stage SCI indicates at least one of an identifier of a transmitting UE or transmission configuration indicator (TCI) states for each of the multiple TBs, and
wherein the one or more processors are configured to receive at least the first TB based at least in part on the TCI state indicated for the at least the first TB.
23 . A method for wireless communication by a transmitting user equipment (UE) in sidelink communications, comprising:
transmitting a first stage sidelink control information (SCI) that schedules multiple transport blocks (TBs) of shared channel communications in multiple time divisions, wherein each of the multiple TBs is for a different receiving UE of multiple receiving UEs;
transmitting one or more second stage SCIs including separate SCI for each of the multiple receiving UEs;
transmitting, to a first receiving UE of the multiple receiving UEs and based on the first stage SCI and the one or more second stage SCIs, at least a first TB of the multiple TBs of shared channel communications in a first time division of the multiple time divisions; and
transmitting, to a second receiving UE of the multiple receiving UEs and based on the first stage SCI and the one or more second stage SCIs, at least a second TB of the multiple TBs of shared channel communications in a second time division of the multiple time divisions,
wherein transmitting at least the first TB includes transmitting a first second stage SCI of the one or more second stage SCIs with at least the first TB,
wherein transmitting at least the second TB includes transmitting a second second stage SCI of the one or more second stage SCIs with at least the second TB, and
wherein transmitting the first stage SCI includes transmitting the first stage SCI in a slot preceding at least the first TB and at least the second TB.
24 . The method of claim 23 , further comprising transmitting, with the first stage SCI, multiple second stage SCIs for the multiple receiving UEs.
25 . A method for wireless communication by a receiving user equipment (UE) in sidelink communications, comprising:
receiving a first stage sidelink control information (SCI) that schedules multiple transport blocks (TBs) of shared channel communications in multiple time divisions, wherein each of the multiple TBs is for a different receiving UE of multiple receiving UEs;
receiving one or more second stage SCIs including separate SCI for each of the multiple receiving UEs;
receiving, based on the first stage SCI and a second stage SCI of the one or more second stage SCIs that is for the UE, at least a first TB of the multiple TBs of shared channel communications in a first time division of the multiple time divisions; and
receiving, with the first stage SCI, multiple second stage SCIs for the multiple receiving UEs,
wherein the first stage SCI further indicates at least one of a time domain resource allocation (TDRA) for the multiple TBs, a frequency domain resource allocation (FDRA) for the multiple TBs, a common demodulation reference signal (DMRS) pattern for the multiple TBs, or a priority field for the multiple TBs, and
wherein receiving at least the first TB is based at least in part on at least one of the TDRA, the FDRA, the common DMRS pattern, or the priority field.
26 . The method of claim 25 , further comprising receiving, with the first stage SCI, multiple second stage SCIs for the multiple receiving UEs.