Qualcomm Incorporated

Other

Tien Viet Nguyen

Kapil Gulati

Sudhir Kumar Baghel

Shailesh Patil

Gabi Sarkis

Shuanshuan Wu

Arjun Bharadwaj

Junyi Li

Zhibin Wu

Sourjya Dutta

Libin Jiang

Hong Cheng

Wanshi Chen

Seyedkianoush Hosseini

Naga Bhushan

Anantharaman Balasubramanian

Durga Prasad Malladi

Tao Luo

Peter S Gaal

Jing X Sun

Qing Li

Gene Wesley Marsh

Xiaoxia Zhang

Yisheng Xue

Sony Akkarakaran

Navid Abedini

Wei Jennifer Yang

Juan Montojo

Alexandros Manolakos

Hung Dinh Ly

Linhai He

Aamod Dinkar Khandekar

Shay Landis

Assaf Touboul

Gideon Shlomo Kutz

Soumya Das

Karthika Paladugu

Ralph Akram Gholmieh

Wei Yang

Arthur Gubeskys

Georgios Tsirtsis

Guangyi Liu

Hui Guo

Gene Fong

Cheol Hee Park

Chang-Sik Choi

Marco Papaleo

Tal Oved

Tugcan Aktas

Srinivasan Rajagopalan

Subramanya P Rao

Ashish Shankar Iyer

Sean Vincent Maschue

Chu-Hsiang Huang

Stelios Stefanatos

John Forrester

Praveen Kumar Appani

Hamza Ijaz Abbasi

Pinaki Sarkar

Michael Alexander Ruder

Scott Trimber

Basheer Janjua

Dong Hoang

Ping Ma

Junyl Li

Amy Thorne

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a sidelink transmission that includes a transport block, and may transmit sidelink feedback, for each of a plurality of code block groups included in the transport block, in respective physical sidelink feedback channel (PSFCH) resources. In some aspects, a UE may receive a sidelink transmission that spans a plurality of slots, and may transmitting, for the sidelink transmission, sidelink feedback in at least one of: first one or more PSFCH resources that occur during the sidelink transmission, or second one or more PSFCH resources that occur after the sidelink transmission. Numerous other aspects are provided.

Feedback for sidelink transmissions

Certain aspects of the present disclosure provide techniques for using physical resource blocks (PRBs) of a sidelink resource pool that, in some cases, might not belong to a sub-channel in sidelink or are assigned to a special sub-channel. When a user equipment (UE) is transmitting a sidelink communication, the sidelink communication often takes place in resource pools that include sub-channels in frequency domain and slots in a time domain. A first subset of PRBs of the resource pool may be assigned to one or more sub-channels in the frequency domain. The disclosed methods, devices, and systems provide for identifying PRBs not assigned to the first subset (e.g., remaining or unused PRBs or PRBs assigned to a special sub-channel). In some aspects of the present disclosure, the UE may use these PRBs for various purposes.

Techniques for using physical resource blocks (PRBS) in a sidelink resource pool

Methods, systems, and devices for wireless communications are described. In some systems (e.g., sidelink systems, such as vehicle-to-everything (V2X) systems), wireless devices may perform dynamic resource reservations to schedule packet transmissions (e.g., data packet transmissions). Different packets may correspond to different priority levels. To support flexible resource reservation for high priority packets, wireless devices may implement techniques for preempting lower priority reservations. For example, a wireless device may identify reservations for transmitting different packets during a same transmission time interval (TTI). The device may determine whether a first or second packet has a higher relative priority and may communicate in the V2X system during the TTI according to the relative priorities. For example, a device that reserved the TTI for the lower priority packet may refrain from transmitting the packet during the TTI, while a device that reserved the TTI for the higher priority packet may transmit the packet.

Handling packets with different priorities in sidelink systems

Apparatus, methods, and computer-readable media for facilitating a SL communication for moderesource allocation are disclosed herein. An example method includes performing sensing on one or more SL resources to identify a first set of available resources. The example method further includes adjusting a first measurement threshold to a second measurement threshold based on a size of the first set of available resources being below an availability threshold. The example method further includes transmitting a sidelink message indicating a second set of available resources based on the second measurement threshold.

Receiver side sensing for sidelink inter-UE-coordination

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may identify multiple candidate sets of physical sidelink feedback channel (PSFCH) transmissions that include hybrid automatic repeat request (HARQ) feedback for sidelink communications received from one or more peer UEs. The UE may select, from one or more of the multiple candidate sets that satisfy a PSFCH transmit power constraint, at least one candidate set that has a highest value for a utility parameter among utility parameters associated with each of the one or more candidate sets that satisfy a PSFCH transmit power constraint. The UE may transmit, on a PSFCH, the plurality of PSFCH transmissions included in the at least one candidate set in a HARQ feedback occasion. Numerous other aspects are provided.

Concurrent physical sidelink feedback channel transmission

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive an indication of a time offset for synchronization signal resources for synchronization signals associated with a first radio access technology (RAT). The UE may determine the synchronization signal resources and a synchronization periodicity based on the indication and a penetration ratio of UEs associated with the first RAT. The UE may selectively transmit the synchronization signals on the synchronization signal resources and according to the synchronization periodicity. Additionally, or alternatively, the UE may determine that other synchronization signal resources are allocated for a second RAT and may select resources for communications associated with the first RAT based on determining that the other synchronization signal resources are allocated. The UE may perform communications associated with the first RAT based on selecting the resources.

Resource sharing between sidelink devices using different radio access technologies

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a mobile station may transmit, from the mobile station to an encoding device, acknowledgement or negative acknowledgement (ACK-NACK) feedback based at least in part on a transmission by the encoding device, wherein the ACK-NACK feedback is associated with a feedback bin, and wherein the feedback bin is associated with a location of the mobile station. The mobile station may receive, at the mobile station from the encoding device, a network coding transport block, wherein the network coding transport block is formed based at least in part on the transmission and the ACK-NACK feedback associated with the feedback bin. Numerous other aspects are described.

Network coding using feedback associated with feedback bins

Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may receive a sidelink message via a sidelink transmission resource of a shared sidelink resource pool that is shared between a communications according to a first radio access technology (RAT) and communications according to a second RAT. The UE may map sidelink transmission resource occasions of the shared resource pool to a physical sidelink feedback channel (PSFCH) occasion and map subchannels of the sidelink transmission occasions to respective resources of the PSFCH occasion. The UE may transmit a sidelink feedback message corresponding to the sidelink message using a resource of the PSFCH occasion corresponding to a subchannel carrying sidelink control information of the sidelink message.

Feedback transmissions with adaptive and dynamic sidelink cochannel coexistence

Methods, systems, and devices for wireless communications are described. A first user equipment (UE) sense sidelink transmissions to determine a set of resources that may be reserved by one or more other UEs. The set of resources may include a first subset of resources associated with a first radio access technology (RAT) and a second subset of resources associated with a second, different RAT. The first UE may transmit a message to a second UE indicating resource information for transmissions by the second UE, and the resource information may indicate that the first subset of resources is associated with the first RAT and that the second subset of resources is associated with the second RAT. Additionally, or alternatively, the first UE may transmit an indication of collisions between resources reserved for transmissions associated with the first RAT and resources reserved for transmissions associated with the second RAT.

Techniques for inter-user equipment (UE) coordination-based sidelink communications

This disclosure provides systems, methods, and devices for wireless communication that support blind reTx for sidelink communication. In a first aspect, a method of wireless communication includes determining a first threshold based on a first number of re-transmissions per packet associated with a first time window, a second threshold based on a first reference signal receive power (RSRP) threshold for resource selection/exclusion associated with the first time window, or a combination thereof. The method further includes initiating a blind transmission (Tx) based on a determination that a second number of re-transmissions per packet associated with a second time window is greater than or equal to the first threshold, a determination that a second RSRP threshold associated with the second time window is less than or equal to the second threshold, or a combination thereof. Other aspects and features are also claimed and described.

Blind re-transmission (reTx) for sidelink communications

A first user equipment (UE) receives, via first sidelink resources from a second UE, a reservation message that includes an indication of second sidelink resources via which the first UE will subsequently receive a data packet. The first UE may at least one of: determine if the first UE is an intended recipient of the data packet, or compare a reference signal received power (RSRP) value of the reservation message to a threshold value. The first UE may transmit a first reservation forwarding message, via one or more third sidelink resources, including at least the indication of the second sidelink resources to at least a third UE in response to at least one of: determining that the first UE is the intended recipient of the data packet, or determining that the RSRP value is less than the threshold value. The first UE subsequently receives the data packet.

Resource reservation forwarding procedure in new radio sidelink

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may reserve a transmission resource for transmitting a transmission block (TB) via a sidelink communication; reserve a retransmission resource for retransmitting the TB, wherein the retransmission resource is reserved such that at least one hybrid automatic repeat request acknowledgement (HARQ-ACK) feedback occasion occurs between transmission of the TB and a first retransmission of the TB; and communicate with another UE via the sidelink communication based at least in part on the transmission and retransmission resources. Numerous other aspects are provided.

Reservation periodicity for NR V2X periodic scheduling

Some aspects described herein relate to determining, by a transmitter user equipment (UE) in sidelink communications with a receiver UE, a feedback forwarding timing capability based at least in part on a first timing for receiving and processing feedback from the receiver UE, and receiving, from an access point and based on the feedback forwarding timing capability, at least an uplink resource grant for transmitting feedback for at least one of sidelink communications or downlink communications. Other aspects relate to determining, by a transmitter UE in sidelink communications with a receiver UE, a timing capability for the receiver UE to at least one of receive sidelink communications from the transmitter UE or report feedback for the sidelink communications to the transmitter UE.

Techniques for determining feedback timing capability in sidelink wireless communications

Method and apparatus for a prioritization of synchronization signals for NR-LTE in-band coexistence. The apparatus detects a first sidelink synchronization signal from a first RAT and a second sidelink synchronization signal from a second RAT. The apparatus determines a priority between a synchronization source associated with the first RAT and the second RAT. The apparatus transmits data using a timing based on a determination of the priority between the first RAT and the second RAT. The apparatus determines to transmit a sidelink synchronization signal to be the synchronization source in response to detecting the first sidelink synchronization signal from the first RAT. The apparatus determines to transmit at least one of the first sidelink synchronization signal or the second sidelink synchronization signal.

Method for prioritization of synchronization signals for NR-LTE in-band coexistence

Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may be configured to trigger a sidelink message to one or more UE of set of multiple other UEs. The first UE may then generate the sidelink message based at least in part on the triggering. In some cases, the sidelink message may include time and frequency resource information associated with sidelink control information received and processed by the first UE. The first UE may multiplex the sidelink message with a sidelink data message. The first UE may then transmit the sidelink message multiplexed with the sidelink data message to the one or more UE of the set of multiple other UEs.

Techniques for sidelink resource information forwarding

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Bridgewater, NJ, United States of America

Tien Viet Nguyen