Qualcomm Incorporated

Tugcan Aktas

Seyedkianoush Hosseini

Wei Jennifer Yang

Yi Huang

Wanshi Chen

Hwan Joon Kwon

Peter S Gaal

Krishna Kiran Mukkavilli

Tingfang Ji

Ahmed Elshafie

Yeliz Tokgoz

Wei Yang

Gabi Sarkis

Juan Montojo

Hung Dinh Ly

Tien Viet Nguyen

Sourjya Dutta

Kianoush Hosseini

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

Examples of the disclosure relate to generating a packet for transmission over a sidelink resource pool and transmitting the packet to a second UE on a set of sidelink resources of the sidelink resource pool. The set may be selected based on a resource selection procedure of a plurality of resource selection procedures. The resource selection procedure may be selected based at least in part on one or more utilization parameters corresponding to one or more resources of the sidelink resource pool. Other examples, and features are also claimed and described.

Resource allocation techniques for sidelink transmissions, and dynamic selection between resource allocation techniques based on sidelink communication reliability

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may determine, based at least in part on a weighted number of UEs that is based at least in part on respective resource utilizations by the UEs, a resource utilization limit for the UE. The UE may selectively transmit a communication based at least in part on the resource utilization limit for the UE. Numerous other aspects are provided.

Congestion control in a sidelink communication network

Methods, systems, and devices for wireless communications at a user equipment (UE) are described. A user equipment (UE) may receive a first data message in a sub-slot of a slot and in a sub-channel of a sidelink data channel. The UE may select a resource of a sidelink feedback channel based on a first index associated with the slot and a second index associated with the sub-slot within one or more slots comprising the slot. Additionally or alternatively, the UE may select a resource of a sidelink feedback channel from periodic resources having a slot-based periodicity based on an index associated with the sub-slot within one or more slots comprising the slot. The UE may transmit a feedback message associated with the first data message according to the selected resource.

Feedback designs for sidelink sub-slots

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may select a set of available sidelink resources in a selection window for communication by a second UE. The first UE may transmit, to the second UE, an inter-UE coordination message that indicates inter-UE coordination information identifying the set of available sidelink resources, wherein the selection window is of a length different than a length of a resource selection window of the first UE. Numerous other aspects are provided.

Timeline for sidelink inter-user equipment coordination

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a first user equipment (UE) may receive, in a first broadcast message from a second UE, an indication of one or more sidelink resources in a resource selection window of a sidelink channel that are available for transmission by the second UE to a third UE. The UE may sense the sidelink channel. The UE may select one or more candidate sidelink resources that are available for a fourth UE to use for transmission to the first UE based at least in part on the indication in the broadcast message and the sensing of the sidelink channel. The UE may transmit, to the fourth UE in a second broadcast message, an indication of the candidate sidelink resources that are available for the fourth UE. Numerous other aspects are described.

Broadcast of sidelink resource indication

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration of a set of resources for sidelink coordination information reports. The UE may transmit a sidelink coordination information report message in at least one resource selected from the set of resources for sidelink coordination information reports. Numerous other aspects are provided.

Resource selection for sidelink coordination information report messages

Aspects of the disclosure relate to transmitting, from a first user equipment (UE) to a second UE, a resource report indicative of an availability of a set of resources among a sidelink resource pool based on a measurement of interference in the set of resources. The resource report includes resource availability information indicating that a reserved set of resources reserved for a third UE is available based on an interference parameter associated at least in part with the second UE or the third UE. Other aspects, and features are also claimed and described.

Receiver assisted sidelink resource allocation using an adaptive threshold

Wireless communications systems and methods related to transmitting sidelink channel state information (CSI) from one user equipment (UE) to another UE using a L1 signal. A first UE requests a CSI report from a second UE. The first UE sends a reference signal which the second UE measures to determine channel characteristics. The second UE forms a CSI report which includes a rank indicator, a channel quality indicator, and potentially a precoding matrix index indicator. The second UE forms the CSI report at the PHY level. The CSI report is included in reserved field(s) of a second stage sidelink control information (SCI-2). The first UE receives and processes the CSI report at a PHY level.

L1 CSI feedback via SCI-2 for V2X and SL communications

Methods, systems, and devices for wireless communications are described. Generally, a user equipment (UE) may generate statistical modeling of sensing outcomes (e.g., may identify one or more measurement statistics), and may transmit values that are quantized based on the one or more measurement statistics. Measurement statistics may include one or more of mean and variance of sensing results (e.g., channel quality measurements such as signal to interference ratio (SIR)), auto-correlation of measurements or measurement statistics over time, auto-covariance, or the like. In some examples, a UE may incorporate channel measurement statistics into a waveform (e.g., the coordination report) or otherwise compress the measurements. The UE may measure its own self-interference, and may indicate (e.g., in the coordination message) resource availability that reflects the measured self-interference. A receiving UE may use the coordination message to schedule subsequent sidelink communications (e.g., with the transmitting UE or with other UEs).

Sensing report quantization for inter-user equipment coordination

Example implementations include a method, apparatus and computer-readable medium of wireless communication over a sidelink between a first user equipment (UE) and a second UE. The first UE may identify a configuration for discontinuous reception (DRX) for direct link communications with a second UE. The first UE may determine a channel busy ratio (CBR) based on a plurality of CBR measurement occasions within a time window prior to a direct link transmission based on the configuration for DRX. The first UE may determine whether to perform a congestion control on the direct link transmission based on the CBR. The first UE may perform a direct link transmission subject to a channel occupancy ratio limit.

Congestion control for power savings in user equipment for direct link communications

Methods, systems, and devices for wireless communications are described. In some systems, a first user equipment (UE) may operate in accordance with a multi-user (MU) multiple input-multiple output (MIMO) communication mode and may communicate with multiple other UEs over a same physical sidelink shared channel (PSSCH) resource. In some implementations, the first UE may transmit an indication of an MU-unicast mode for multiple sidelink transmissions to the multiple other UEs and may transmit the multiple sidelink transmissions to the multiple other UEs over the same PSSCH resource. In such implementations, the multiple other UEs may select physical sidelink feedback channel (PSFCH) resources to transmit feedback associated with the multiple sidelink transmissions in accordance with a PSFCH resource selection procedure associated with the MU-unicast mode. In accordance with the PSFCH resource selection procedure, the multiple other UEs may each select different PSFCH resources for their respective feedback transmissions.

Feedback designs for multi-user multiple input-multiple output sidelink communication

Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may receive, from a base station, control signaling indicating a set of resources of a sidelink channel available for sidelink communication with a second UE. The first UE may receive a sidelink preemption indication indicating that at least a first resource from the set of resources is preempted. The first UE may communicate a sidelink transmission over the sidelink channel with the second UE based on the sidelink preemption indication. In some cases, the first UE may determine whether the SPI satisfies one or more thresholds and the first UE may communicate the sidelink transmission, or refrain from communicating the sidelink transmission, based on determining whether the SPI satisfies the one or more thresholds.

Techniques for sidelink preemption indications in wireless communications systems

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive a configuration of a set of resources for sidelink coordination information requests. The UE may transmit a sidelink coordination information request message in at least one resource selected from the set of resources for sidelink coordination information requests. Numerous other aspects are provided.

Resource selection for sidelink coordination information request messages

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a transmitting (Tx) user equipment (UE) may receive, from a plurality of receiving (Rx) UEs, indications of channel busy ratios (CBRs) associated with the plurality of Rx UEs, respectively. The Tx UE may combine the CBRs to obtain a combined CBR associated with the Tx UE. The Tx UE may adjust a resource utilization based at least in part on the combined CBR associated with the Tx UE. Numerous other aspects are described.

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La Jolla, CA, United States of America

Tugcan Aktas