Qualcomm Incorporated

Chih-Hao Liu

Xiaoxia Zhang

Jing X Sun

Yisheng Xue

Srinivas Yerramalli

Tamer Adel Kadous

Tao Luo

Ozcan Ozturk

Peter S Gaal

Sony Akkarakaran

Piyush Gupta

Juan Montojo

Lik Hang Silas Fong

Giovanni Chisci

Xiaojie Wang

Junyi Li

Yongbin Wei

Seyed Ali Akbar Fakoorian

Rajat Prakash

Aleksandar Damnjanovic

Changlong Xu

Jung Ho Ryu

Chirag Dipak Patel

Shuanshuan Wu

Alberto Rico Alvarino

Qingjiang Tian

Yan Zhou

Wooseok Nam

Mostafa Khoshnevisan

Arumugam Chendamarai Kannan

Hua Wang

Chirag Sureshbhai Patel

Hao Xu

Andrei Dragos Radulescu

Kobi Ravid

Kapil Bhattad

Qing Li

Yi Huang

Jing Jiang

Linhai He

Jing Lei

Ahmed Kamel Sadek

June Namgoong

Srikant Jayaraman

Jae Ho Ryu

Stelios Stefanatos

Methods, systems, and devices for wireless communications are described. Generally, the described techniques provide for a user equipment (UE) to transmit feedback information via a configurable quantity of interlaced resource blocks (IRBs) in one or more interlaces of a sidelink feedback channel. For example, the UE may transmit feedback via multiple IRBs of an interlace. The UE may determine which IRBs to use in accordance with a configuration, which may indicate a quantity of IRBs, a distribution of the IRBs, a pattern of the IRBs, or any combination thereof. Additionally, or alternatively, the UE may determine to transmit feedback via multiple IRBs of an interlace that is different from a common interlace.

Sidelink feedback for increased capacity

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit communications on a plurality of physical sidelink channels with a plurality of beams for a plurality of subchannels. The UE may select a beam for transmission or reception from among the plurality of beams. Numerous other aspects are provided.

Beam sweep and beam indication on physical sidelink channels

Systems, devices, and methods for mapping wideband sidelink (SL) resources to SL feedback resources are provided. For example, a method of wireless communication performed by a user equipment (UE) comprises: receiving, based on at least a first interlace of resource blocks (RBs) and based on two or more RB-sets of a shared frequency band, a SL communication; and transmitting, using at least a second interlace of RBs and using resources from at least one RB-set of the two or more RB-sets of the shared frequency band, a SL feedback communication for the SL communication. In some aspects, the transmitting the SL feedback communication is based on a mapping of the two or more RB-sets to the at least one RB-set.

Interlaced physical sidelink feedback channel mapping for wideband sidelink transmissions

Wireless communications systems and methods related to stand-alone sidelink communication are provided. A first user equipment (UE) determines system parameter information to initiate a sidelink communication. The first UE transmits, in one or more first subbands of a plurality of subbands within a shared radio frequency during a first time period, the system parameter information. The first UE communicates, with a second UE in a second subband of the plurality of subbands during a second time period different from the first time period, sidelink data based on the system parameter information.

Stand-alone sidelink communication over unlicensed band

Wireless communications systems and methods related to stand-alone sidelink communication are provided. A first user equipment (UE) transmits a sidelink system information signal including an indication of a first preconfigured profile of a plurality of preconfigured profiles. The first UE communicates, with a second UE, a first sidelink transmission based at least in part on the first preconfigured profile.

Stand-alone sidelink for industrial internet of thing (IIoT)

Wireless communications systems, apparatuses, and methods are provided. A method of wireless communication performed by a first sidelink user equipment (UE) may include receiving, from a second sidelink UE, a configuration associated with multiplexing a first physical sidelink feedback channel (PSFCH) having a first format with a second PSFCH having a second format, wherein the second format is different from the first format, receiving, from the second sidelink UE, one or more transport blocks (TBs), and transmitting, to the second sidelink UE based on the configuration, an acknowledgement/negative-acknowledgment (ACK/NACK) associated with the one or more TBs via the first PSFCH multiplexed with the second PSFCH.

Multiplexing physical sidelink feedback channels in sidelink communication

Methods, systems, and devices for wireless communications are described. In some examples, a transmitting device associated with one or more non-coherent demodulation reference signal ports may transmit data including a phase change estimation reference signal with multiple reference signal groups. In some examples, multiple different phase change estimation reference signal ports may be code-division multiplexed to transmit the phase change estimation reference signal in the same set of reference signal groups using a different orthogonal cover code for each phase change estimation reference signal port. In some other examples, the different phase change estimation reference signal ports may be used for transmitting the phase change estimation reference signal in the different time-division multiplexed sets of reference signal groups. In such cases, by assigning two phase change estimation reference signal ports to two TDM sets, the two phase change estimation reference signal ports may be time-division multiplexed.

Multiple-port phase change estimation reference signals for discrete Fourier transform-spread orthogonal frequency-division multiplexing (DFT-S-OFDM) transmissions

Wireless communications systems, apparatuses, and methods are provided. A method of wireless communication performed by a first sidelink user equipment (UE) includes performing a listen-before-talk (LBT) procedure and transmitting, to a second sidelink UE based on the LBT procedure being successful, a sidelink synchronization signal block (S-SSB) in one of a plurality of candidate S-SSB locations of a slot.

Sidelink synchronization signal block patterns for multiple listen-before-talk opportunities

Wireless communications systems and methods related to communicating control information are provided. A method of wireless communication performed by a sidelink user equipment (UE) may include receiving, from a base station (BS), a configuration indicating a listen-before-talk (LBT) window, wherein the configuration indicates a start and an end associated with the LBT window, performing, during the LBT window, an LBT for a channel occupancy time (COT) in a shared radio frequency band, and transmitting, to another sidelink UE, based on the LBT being successful, one or more transport blocks (TBs) during the COT.

Channel occupancy time contention grant for sidelink communications

This disclosure provides systems, methods, and apparatus, including computer programs encoded on computer storage media, for distance-based channel occupancy time (COT) sharing. In one aspect, a first device, such as a user equipment (UE), may determine an approximate distance between itself and a second device. The first device may receive a COT sharing configuration including a set of COT sharing parameters for sharing a COT of the communications link with the second device based on the distance between the two devices. The first device may determine conditions for sharing the COT based on the COT sharing configuration and the approximate distance between the two devices. Additionally, or alternatively, the first device may determine conditions for sharing the COT based on the COT sharing configuration and a power metric of communications between the two devices.

Distance-based channel occupancy time (COT) sharing

Wireless communications systems and methods related to communicating ACK/NACK feedbacks for multi-user and unicast physical down-link shared channel (PDSCH) communications are provided. A UE may receive a multi-user PDSCH communication including a first transport block (TB) for the UE and may receive a unicast PDSCH communication including a second TB for the UE. The UE may determine a hybrid automatic repeat request (HARQ) codebook for the first TB associated with the multi-user PDSCH communication and the second TB associated with the unicast PDSCH communication. The UE may transmit a first acknowledgement/negative-acknowledgment (ACK/NACK) feedback for the first TB and a second ACK/NACK feedback for the second TB based on the determined HARQ codebook.

Dynamic hybrid automatic repeat request (HARQ) codebook for multi-user packet (MUP) and/or unicast communications

Aspects of the disclosure relate to a user equipment (UE) for establishing a sidelink communication channel and receive mapped channel state information-reference signals (CSI-RS) over a plurality of PSSCH resource blocks. The mapped CSI-RS may be interlaced with resource elements in at least a portion of the plurality of PSSCH resource blocks. The CSI-RS received over the plurality of PSSCH blocks is then processed to determine a channel quality of the sidelink channel from the portion of the plurality of PSSCH resource blocks including the mapped CSI-RS.

Interlaced sidelink data for communication

Methods, systems, and devices for wireless communication are described. In some cases, a first user equipment (UE) may perform a listen-before-talk (LBT) procedure to identify a channel occupancy time (COT). The COT may include some slots for transmitting a sidelink message and some sidelink synchronization signal block (S-SSB) slots for transmitting S-SSBs. In some examples, to fill a gap created by the S-SSB slots within the COT and thus maintain the COT across the S-SSB slots, the first UE or the second UE may transmit some signaling to provide transmissions in the S-SSB slots. For example, the first UE may transmit a padding signal, the second UE may transmit S-SSBs, or the UEs may use a gap control procedure. Upon filling the gap, the first UE may transmit a sidelink message to the second UE in slots of the COT excluding the S-SSB slots.

Maintaining channel occupancy time across sidelink synchronization signal block slots in unlicensed sidelink

A method of wireless communication performed by a first wireless communication device may maintain a channel occupancy time (COT) in a shared frequency band during at least one physical sidelink feedback channel (PSFCH) instance. In some aspects, the method includes transmitting, in a first portion of a COT based on a listen-before talk (LBT), a first sidelink (SL) communication comprising SL communication information (SCI), the SCI indicating a second wireless communication device to transmit a signal in at least one gap symbol preceding a PSFCH resource. The method further includes receiving, from the second wireless communication device, the signal during the at least one gap symbol. The method further includes transmitting, in a second portion of the COT based on the LBT, a second SL communication, wherein the second portion of the COT is subsequent to the PSFCH resource.

Channel occupancy time (COT) maintenance for sidelink communications in unlicensed bands

Wireless communications systems, apparatuses, and methods are provided. A method of wireless communication performed by a first sidelink user equipment (UE) may include transmitting, to a second sidelink UE, a configuration indicating at least one of a length associated with a sidelink synchronization signal block (S-SSB) burst, a quasi-colocation (QCL) index associated with the S-SSB burst, or a first QCL order associated with the S-SSB burst and transmitting, to the second sidelink UE, the S-SSB burst based on the at least one of the length associated with the S-SSB burst, the QCL index associated with the S-SSB burst, or the first QCL order associated with the S-SSB burst.

Dynamic synchronization signal blocks for sidelink communication

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San Diego, CA, United States of America

Chih-Hao Liu