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US-20260129658-A1 - METHOD AND APPARATUS FOR SCHEDULING MULTIPLE PSSCHS BY A SINGLE SCI

US20260129658A1US 20260129658 A1US20260129658 A1US 20260129658A1US-20260129658-A1

Abstract

Embodiments of the present disclosure relate to methods and apparatuses for multiple PSSCHs scheduling by a single SCI. According to some embodiments of the disclosure, a UE may: receive a plurality of PSSCHs scheduled by a first SCI, wherein the plurality of PSSCHs carry at least one TB; determine, based on an indicator in the first SCI, a number of the at least one TB; generate HARQ-ACK information bits for the plurality of PSSCHs, wherein a number of the HARQ-ACK information bits is based on the number of the at least one TB; and transmit the HARQ-ACK information bits.

Inventors

  • Haipeng Lei
  • Xin Guo
  • Xiaodong Yu
  • Zhennian Sun

Assignees

  • LENOVO (BEIJING) LIMITED

Dates

Publication Date
20260507
Application Date
20220715

Claims (20)

  1. 1 . A first user equipment (UE) for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: receive a plurality of physical sidelink shared channels (PSSCHs) scheduled by first sidelink control information (SCI), wherein the plurality of PSSCHs carry at least one transport block (TB); determine, based on an indicator in the first SCI, a number of the at least one TB; generate hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits for the plurality of PSSCHs, wherein a number of the HARQ-ACK information bits is based on the number of the at least one TB; and transmit the HARQ-ACK information bits.
  2. 2 . (canceled)
  3. 3 . The UE of claim 1 , wherein each of the at least one TB is mapped to an approximately equal number of PSSCHs of the plurality of PSSCHs.
  4. 4 . The UE of claim 3 , wherein each of the number of the at least one TB is mapped to a first number of PSSCHs of the plurality of PSSCHs and each of the remaining TBs of the at least one TB is mapped to a second number of PSSCHs of the plurality of PSSCHs; and wherein a difference between the first number and the second number is equal to 0 or 1.
  5. 5 . The UE of claim 1 , wherein the at least one processor is further configured to cause the UE to receive a TB repetition number, and the at least one TB is mapped to the plurality of PSSCHs based on the TB repetition number.
  6. 6 . The UE of claim 5 , wherein each of a first number of TBs of the at least one TB is transmitted on a number of PSSCHs equal to the TB repetition number among the plurality of PSSCHs, and each of the remaining TBs of the at least one TB is transmitted on a number of PSSCHs smaller than the TB repetition number among the plurality of PSSCHs.
  7. 7 . The UE of claim 1 , wherein the number of the at least one TB is an X-number, and the at least one TB is one-to-one mapped to a first X-number PSSCHs of the plurality of PSSCHs and then repeatedly one-to-one mapped to remaining PSSCHs of the plurality of PSSCHs until there are no remaining PSSCHs in the plurality of PSSCHs.
  8. 8 . The UE of claim 1 , wherein the indicator indicates whether a single TB is repeated on the plurality of PSSCHs or each of the plurality of PSSCHs carries a different TB.
  9. 9 . The UE of claim 1 , wherein a first TB of the at least one TB is mapped to a first set of PSSCHs of the plurality of PSSCHs, the first SCI indicates a first redundancy version (RV) for a first scheduled PSSCH of the first set of PSSCHs, and one or more RVs for remaining one or more PSSCHs of the first set of PSSCHs follows the first RV based on an RV pattern.
  10. 10 . The UE of claim 9 , wherein the RV pattern is one of: configured by at least one of radio resource control (RRC) signaling, or predefined, or preconfigured for the first UE; or indicated by the first SCI from a set of RV patterns, which is configured by at least one of the RRC signaling, or predefined, or preconfigured for the UE.
  11. 11 . The UE of claim 1 , wherein a first TB of the at least one TB is mapped to a first set of PSSCHs of the plurality of PSSCHs, the first SCI indicates a redundancy version (RV) pattern for the first set of PSSCHs, and one or more RVs for the one or more PSSCHs of the first set of PSSCHs follows the RV pattern in order.
  12. 12 . The UE of claim 1 , wherein the first SCI further schedules a second SCI, and the second SCI is multiplexed on at least one of a first scheduled PSSCH of the plurality of PSSCHs, each of the plurality of PSSCHs, or a set of PSSCHs of the plurality of PSSCHs.
  13. 13 . The UE of claim 12 , wherein: the first SCI includes the indicator, and a payload size of the second SCI is determined based on at least one of the number of the at least one TB, a maximum number of TBs schedulable by the first SCI, or the indicator and the maximum number of TBs schedulable by the first SCI; or the second SCI includes the indicator, and the payload size of the second SCI is determined based on the maximum number of TBs schedulable by the first SCI.
  14. 14 . A user equipment (UE) for wireless communication, comprising: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: transmit first sidelink control information (SCI) and a plurality of physical sidelink shared channels (PSSCHs), wherein the plurality of PSSCHs is scheduled by the first SCI for carrying at least one transport block (TB) and the first SCI includes an indicator indicating a number of the at least one TB; and receive hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits for the plurality of PSSCHs, wherein a number of the HARQ-ACK information bits is based on the number of the at least one TB.
  15. 15 . A method performed by a first user equipment (UE), the method comprising: receiving a plurality of physical sidelink shared channels (PSSCHs) scheduled by first sidelink control information (SCI), wherein the plurality of PSSCHs carry at least one transport block (TB); determining, based on an indicator in the first SCI, a number of the at least one TB; generating hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits for the plurality of PSSCHs, wherein a number of the HARQ-ACK information bits is based on the number of the at least one TB; and transmitting the HARQ-ACK information bits.
  16. 16 . A processor for wireless communication, comprising: at least one controller coupled with at least one memory and configured to cause the processor to: receive a plurality of physical sidelink shared channels (PSSCHs) scheduled by first sidelink control information (SCI), wherein the plurality of PSSCHs carry at least one transport block (TB); determine, based on an indicator in the first SCI, a number of the at least one TB; generate hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits for the plurality of PSSCHs, wherein a number of the HARQ-ACK information bits is based on the number of the at least one TB; and transmit the HARQ-ACK information bits.
  17. 17 . The processor of claim 16 , wherein each of the at least one TB is mapped to an approximately equal number of PSSCHs of the plurality of PSSCHs.
  18. 18 . The processor of claim 17 , wherein each of the number of the at least one TB is mapped to a first number of PSSCHs of the plurality of PSSCHs and each remaining TBs of the at least one TB is mapped to a second number of PSSCHs of the plurality of PSSCHs; and wherein a difference between the first number and the second number is equal to 0 or 1.
  19. 19 . The processor of claim 16 , wherein the at least one controller is configured to cause the processor to receive a TB repetition number, and the at least one TB is mapped to the plurality of PSSCHs based on the TB repetition number.
  20. 20 . The processor of claim 19 , wherein each of a first number of TBs of the at least one TB is transmitted on a number of PSSCHs equal to the TB repetition number among the plurality of PSSCHs, and each remaining TBs of the at least one TB is transmitted on a number of PSSCHs smaller than the TB repetition number among the plurality of PSSCHs.

Description

TECHNICAL FIELD Embodiments of the present disclosure generally relate to wireless communication technology, and more particularly to scheduling a plurality of physical sidelink shared channels (PSSCHs) by single sidelink control information (SCI). BACKGROUND Wireless communication systems are widely deployed to provide various telecommunication services, such as telephony, video, data, messaging, broadcasts, and so on. Wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of wireless communication systems may include fourth generation (4G) systems, such as long term evolution (LTE) systems, LTE-advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems which may also be referred to as new radio (NR) systems. In the above wireless communication systems, a user equipment (UE) may communicate with another UE via a data path supported by an operator's network, e.g., a cellular or a Wi-Fi network infrastructure. The data path supported by the operator's network may include a base station (BS) and multiple gateways. Some wireless communication systems may support sidelink communications, in which devices (e.g., UEs) that are relatively close to each other may communicate with one another directly via a sidelink, rather than being linked through the BS. The term “sidelink” may refer to a radio link established for communicating among devices (e.g., UEs), as opposed to communicating via the cellular infrastructure (e.g., uplink and downlink). Sidelink transmissions may be performed on a licensed spectrum and an unlicensed spectrum. There is a need for handling sidelink transmissions on an unlicensed spectrum. SUMMARY Some embodiments of the present disclosure provide a first user equipment (UE). The first UE may include a transceiver, and a processor coupled to the transceiver. The processor may be configured to: receive a plurality of physical sidelink shared channels (PSSCHs) scheduled by first sidelink control information (SCI), wherein the plurality of PSSCHs carry at least one transport block (TB); determine, based on an indicator in the first SCI, a number of the at least one TB; generate hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits for the plurality of PSSCHs, wherein a number of the HARQ-ACK information bits is based on the number of the at least one TB; and transmit the HARQ-ACK information bits. In some embodiments of the present disclosure, the indicator may indicate whether a single TB is repeated on the plurality of PSSCHs or each of the plurality of PSSCHs carries a different TB. In some examples, the indicator is specific for multi-PSSCH scheduling. In some examples, an SCI format indicator in the first SCI is reused as the indicator. Some embodiments of the present disclosure provide a second user equipment (UE). The second UE may include a transceiver, and a processor coupled to the transceiver. The processor may be configured to: transmit first sidelink control information (SCI) and a plurality of physical sidelink shared channels (PSSCHs), wherein the plurality of PSSCHs is scheduled by the first SCI for carrying at least one transport block (TB) and the first SCI includes an indicator indicating a number of the at least one TB; and receive hybrid automatic repeat request acknowledgement (HARQ-ACK) information bits for the plurality of PSSCHs, wherein a number of the HARQ-ACK information bits is based on the number of the at least one TB. In some embodiments of the present disclosure, the indicator may indicate the number of the at least one TB being X. In some embodiments of the present disclosure, each of the at least one TB may be mapped to an approximately equal number of PSSCHs of the plurality of PSSCHs. In some embodiments, each of a number of the at least one TB may be mapped to a first number of PSSCHs of the plurality of PSSCHs and each of the remaining TBs of the at least one TB may be mapped to a second number of PSSCHs of the plurality of PSSCHs. The difference between the first number and the second number may be equal to 0 or 1. In some embodiments of the present disclosure, the processor may be further configured to transmit a TB repetition number. The at least one TB may be mapped to the plurality of PSSCHs based on the TB repetition number. In some embodiments, each of a first number of TBs of the at least one TB may be transmitted on a number of PSSCHs equal to the TB repetition number among the plurality of PSSCHs, and each of the remaining TBs of the at least one TB may be transmitted on a number of PSSCHs smaller than the TB repetition number among the plurality of PSSCHs. In some embodiments of the present disclosure, the at least one TB may be one-to-one mapped to the first X PSSCHs of the plurality of PSSCHs and then repeatedly one-to-one mapped to the remaining PS