公开(公告)号：US20230037694A1

公开(公告)日：2023-02-09

申请号：US17968044

申请日：2022-10-18

Applicant: Apple Inc.

Inventor： Candy YIU ,  Yujian ZHANG ,  Yi GUO ,  Jaemin HAN

IPC: H04W36/00 ,  H04W76/30 ,  H04W12/037 ,  H04W12/0431 ,  H04W28/06

Abstract: Techniques to configure a user equipment (UE) for a multi-connectivity handover with a source base station (SBS) and a target base station (TBS) include encoding a measurement report for transmission to the SBS. The measurement report is triggered based on a measurement event configured by the SBS. Radio resource control (RRC) signaling from the SBS is decoded, the RRC signaling including a handover command in response to the measurement report. The handover command includes an indication for multi-connectivity support by the SBS and the TBS during the handover. A first protocol stack associated with the SBS and a second protocol stack associated with the TBS are configured at the UE. A packet data convergence protocol (PDCP) protocol data unit (PDU) received at the UE during the handover is processed using the first protocol stack or the second protocol stack.

公开(公告)号：US20220225428A1

公开(公告)日：2022-07-14

申请号：US17442506

申请日：2020-06-05

Applicant: Apple Inc.

Inventor： Gang XIONG ,  Seau S. LIM ,  Yushu ZHANG ,  Yujian ZHANG ,  Sergey SOSNIN

IPC: H04W74/08 ,  H04W74/00 ,  H04W72/04 ,  H04W72/14 ,  H04W72/12 ,  H04L1/18 ,  H04L5/00 ,  H04L1/00

Abstract: Systems, devices, and techniques for random access in a wireless communication network are described. A described technique performed by a user equipment (UE) includes transmitting a first message of a two-step random access procedure to a node of a wireless communication network; receiving, in response to the first message, a downlink control information (DCI) message via a physical downlink control channel (PDCCH) and a second message of the two-step random access procedure via a physical downlink shared channel (PDSCH) in accordance with the DCI message; determining, by the UE, a physical uplink control channel (PUCCH) resource based on the second message; and transmitting, by the UE, hybrid automatic repeat request-acknowledgement (HARQ-ACK) feedback for the second message on the determined PUCCH resource.