Qualcomm Incorporated

Mohammad Ashraf

Ankur Srivastava

Rahul Maringanti

Vivek Bindal

Tom Chin

Shailesh Maheshwari

Ansah Ahmed Sheik

Vishnu Namboodiri Karakkad Kesavan Namboodiri

Arun Prasanth Balasubramanian

Arnab Pal

Jason Tan

Karthik Thirukannan

Anushka Nayse

Sandeep Kumar Aitha

A wireless communication device is described. The wireless communication device includes a memory and a processor in electronic communication with the memory. The processor is configured to determine a packet data convergence protocol (PDCP) packet count corresponding to a last radio link control (RLC) packet received in-sequence. The processor is also configured to detect a missing PDCP packet based on a comparison of the PDCP packet count and a sequence number of a last PDCP packet received in-sequence.

Layered missing packet detection

Methods and apparatus to handle unordered signaling radio bearer (SRB) packets are disclosed. In some aspects, the apparatus may be a user equipment (UE) or a base station. The apparatus may receive a signaling radio bearer (SRB) packet, buffer it in a radio link control (RLC)-to-Packet Data Convergence Protocol (PDCP) reordering window, and selectively forward or discard the SRB packet based upon a reordering timer with a first expiration period that is greater than a second expiration period associated with a data radio bearer (DRB) reordering timer, to give the apparatus extra time to receive a missing SRB packet while maintaining a shorter latency for DRB packets. In some aspects, the apparatus may detect an out-of-order (OOO) SRB packet and request retransmission without waiting for a sending communications device to check on receive status.

Handling unordered signaling radio bearer (SRB) packets

Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive information identifying a recovery time associated with packet data convergence protocol (PDCP) communication using a reordering timer, wherein a distribution of recovered PDCP counts associated with the PDCP communication is associated with a configured characteristic for a packet recovery time. The UE may communicate on a link using a communication configuration associated with a correlation between the packet recovery time and a link characteristic. Numerous other aspects are described.

Latency management for data traffic

Certain aspects of the present disclosure provide techniques for A method for wireless communication by a user equipment (UE), comprising initiating a timer upon reception of a first segmented packet of a plurality of packets of an RLC physical data unit (PDU) at radio link control (RLC) layer, resetting the timer when a packet data convergence protocol (PDCP) layer receives an RLC PDU from the RLC layer, and upon expiry of the timer, initiating a radio recourse control (RRC) connection reestablishment (RRE) procedure with a network.

Mechanism to recover receiver radio link control after multiple unsuccessful automatic repeat query attempts

In a particular implementation, a method of wireless communication includes searching, at a user equipment (UE) having a first subscriber identity module (SIM) and a second SIM, transmit beams from a base station and receive beams from the UE to determine a subset of transmit beams. The method also includes storing indicators of the subset of transmit beams in a database accessible to the UE in response to the second SIM performing a particular operation that causes the first SIM to perform a tune away operation. The method further includes, after completion of the particular operation, performing measurement operations on the subset of transmit beams to select a particular transmit beam of the subset of transmit beams and a corresponding particular receive beam for attachment to the base station.

Beam selection for multi-subscriber identity module (MSIM) devices

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Cuttack, India

Mohammad Ashraf