Qualcomm Incorporated

Shanyu Zhou

Jelena Damnjanovic

Tao Luo

Junyi Li

Juan Montojo

Aleksandar Damnjanovic

Arumugam Chendamarai Kannan

Sony Akkarakaran

Yan Zhou

Peter S Gaal

Ozcan Ozturk

Olufunmilola Omolade Awoniyi-Oteri

Jingchao Bao

Jing X Sun

Iyab Issam Sakhnini

Xiaoxia Zhang

Gabi Sarkis

Mahmoud Taherzadeh Boroujeni

Qian Zhang

Changhwan Park

Methods, systems, and devices for wireless communications are described. A network entity may configure one or more user equipments (UEs) with cell group configuration information for a single cell group or multiple cell groups. The configuration information may include parameters for each cell in the one or more cell groups. The configuration information may include a set of parameters for multiple candidate roles for each cell in the cell group. The network may then dynamically switch, update, or activate, cell groups, and may dynamically switch transmission reception points (TRPs) in a cell group from one role to another via dynamic signaling (e.g., level 1 (L1) or level 2 (L2) signaling). Additionally, or alternatively, the network may activate, deactivate, add, or remove, individual cells or cell groups from a set of configured cells via L1 or L2 signaling.

Group configuration for inter-cell mobility in multi-transmission reception point deployments

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for enhanced signaling related to beam failure prediction. A user equipment (UE) predicts a beam failure condition prior to a number of beam failure instances within a time period reaching a configured threshold number of beam failures. The UE transmits an indicator of the predicted beam failure condition to a serving cell. The indicator may include a request for a change to a beam failure detection reference signal (BFD-RS) or to UE scheduling. The serving cell transmits a notification of a change to the BFD-RS or to UE scheduling in response to the indicator. The UE may continue to monitor for a beam failure condition based on the change or may adjust reception during a predicted duration of the beam failure based on the change.

Enhanced signaling for beam failure detection reference signal with UE predicted beam failure

A method of wireless communication at a UE is disclosed herein. The method includes transmitting, at a first time instance, an indication of a first measurement on at least one DL-RS associated with a first cell, where the first cell is included in a L1 mobility configured cell set or a L2 mobility configured cell set. The method includes receiving, at a second time instance after the first time instance, an estimated TA associated with the first cell. The method includes performing a second measurement on the at least one DL-RS. The method includes accepting or rejecting the estimated TA for communication with the first cell based on at least one of the first measurement or the second measurement.

Timing advance validation techniques for L1/L2 inter-cell mobility

Methods, systems, and devices for wireless communications are described that provide for interference-aware beam failure detection procedures. One or more beam failure parameters may be adjusted based on a likelihood of temporary interference being present for a communications beam. The beam failure parameters may include beam failure indication (BFI) counts or count thresholds that may be adjusted based on a likelihood of BFIs being the result of temporary interference. Additionally or alternatively, one or more measurement thresholds that trigger a BFI may be adjusted based on a likelihood of a presence of temporary interference.

Techniques for interference-based beam failure detection

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, from a base station, a beam failure detection reference signal (BFD-RS). The UE may determine, autonomously at the UE based at least in part on the BFD-RS, a beam failure instance (BFI) count for different types of BFI including BFI noise and BFI interference. The UE may detect a beam failure based at least in part on the BFI count satisfying a threshold. Numerous other aspects are described.

Determining a beam failure instance count for beam failure detection

A method of wireless communication at a UE is disclosed herein. The method includes receiving a L1 or L2 mobility cell configuration for a set of multiple cell groups. Each cell group comprises multiple cells. Cell groups within the set of multiple cell groups are able to be activated or deactivated for L1 or L2 mobility. The method further includes receiving L1 or L2 signaling indicating a PCG from one or more activated cell groups, the PCG including a cell that serves as a SpCell.

L1/L2 mobility and cell group activation/deactivation

A method for wireless communication by a user equipment (UE) includes receiving an indication of a mobility configured cell set having a number of cells. The method also includes receiving signaling to release a selected cell from the mobility configured cell set. The method further includes releasing the selected cell from the mobility configured cell set in response to receiving the signaling. In some aspects, releasing the selected cell comprises removing the selected cell from a carrier aggregation configuration. In other aspects, releasing the selected cell comprises removing a mobility configuration for the selected cell.

Layer one/layer two (L1/L2) signaling to release cells configured for L1/L2 inter-cell mobility

Methods, systems, and devices for wireless communications are described for autonomous block error rate (BLER) threshold determination fur use in beam failure indication (BFI) procedures. A user equipment (UE) that is capable of autonomously determining a BLER threshold value may provide an indication of the capability to a base station. The base station may provide configuration information that enables the UE to perform autonomous BLER threshold determination, and the UE may determine the BLER threshold value based on the configuration information. The UE may determine that a BFI has occurred based on the determined BLER threshold, and thereby enhance beam failure detection procedures to provide more efficient and reliable communications.

Beam failure indication techniques based on user equipment autonomy capability

Methods, systems, and devices for wireless communications are described. A first user equipment (UE) may communicate with a network node via a first wireless link using a first beam according to a first beam configuration. In some examples, the first UE may transmit to the network node via a second wireless link with a second UE, a beam failure recovery (BFR) message in response to identifying a beam failure for the first beam. As such, the UE may receive, a message indicating a second beam configuration. For example, the network node transmit to the first UE via a third wireless link, the second beam configuration including a second beam for the first UE to use to communicate. Additionally, or alternatively, the network node may transmit to the second UE, a signal indicating for the second UE to relay traffic between the network node and the first UE.

Beam failure recovery via sidelink

Apparatus, methods, and computer program products for L1 or L2 mobility are provided. An example method may include receiving a carrier aggregation (CA) configuration associated with a L1 or L2 mobility configuration from a network node, the L1 or L2 mobility configuration including primary cell (PCell) configurations for multiple cells. The example method may further include receiving at least one activation or deactivation of one of the PCell configurations from the network node.

L1/L2 inter-cell mobility and CA

A UE may receive a BFD-RS and calculate, based on the BFD-RS, one or more of a value of an RSSI or at least one of a value of an SNR or a value of an RSRP, such that the UE may report a BFI based on the calculated values. The UE may initiate at least one of a total BFI timer or a consecutive BFI timer when a first BFI of a plurality of BFIs is stored, and increment at least one of a total BFI counter or a consecutive BFI counter when each of the plurality of BFIs is stored. A BFD procedure may be performed if at least one of the total BFI counter is greater than or equal to a maximum total count or the consecutive BFI counter is greater than or equal to a maximum consecutive count prior to an expiration of respective BFI timers.

Beam failure avoidance based on detected interference

Certain aspects of the present disclosure provide techniques for method of wireless communication by a target user equipment (UE), comprising receiving, from a network entity, signaling configuring the target UE with at least one set of parameters for a network coding scheme, receiving, while connected to a cooperative UE via a sidelink, network coded sub-packets from the network entity, receiving, from the cooperative UE via the sidelink, at least one of network coded sub-packets or original sub-packets, decoding the network coded sub-packets received from at least one of the network entity or the cooperative UE, based on the network coding scheme, to recover one or more original packets.

Network coding with user equipment cooperation

Aspects of the present disclosure address beam management enhancement with the assistance of a cooperative relay UE over a sidelink (SL) channel. A UE may include a memory and a processor. The processor may use machine learning and channel condition measurements to predict an upcoming Uu link beam failure (BF). Based on the prediction, the processor may request SL data resources from a base station, wherein the processor may receive an allocated SL channel and a relay UE. When the Uu link fails, the processor can transmit a beam failure recovery (BFR) signal to the base station using the relay UE over the SL channel. The present disclosure overcomes the deficiencies of conventional BFR processes in which the BF forces the UE to perform a contentious RACH procedure, causing time delays and power consumption.

Enhanced UE behavior in prediction and management of beam failures

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive, using a beam, a reference signal associated with a channel for wireless communication. The UE may generate a non-binary beam failure indicator based at least in part on a measurement associated with the beam, wherein the non-binary beam failure indicator comprises at least one non-binary beam failure indicator value. Numerous other aspects are described.

Non-binary beam failure indicators

Methods, systems, and devices for wireless communications are described. A user equipment (UE) may communicate with a network entity using one or more directional beams. The UE may detect a beam failure associated with at least one of the one or more directional beams, and the UE may calculate a duration between a detected beam failure and a subsequent random access occasion. The UE may transmit a beam failure recovery (BFR) message indicating the detected beam failure to the network entity or to a second UE based on whether the calculated duration satisfies a threshold duration. For example, the UE may transmit the BFR message to the second UE when the calculated duration is greater than or equal to the threshold duration. Alternatively, the UE may transmit the BFR message to the network entity when the calculated duration is less than the threshold duration.

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San Diego, CA, United States of America

Shanyu Zhou