公开(公告)号：US12035238B2

公开(公告)日：2024-07-09

申请号：US17593516

申请日：2020-10-14

Applicant: Apple Inc.

Inventor： Haitong Sun ,  Chunhai Yao ,  Chunxuan Ye ,  Dawei Zhang ,  Hong He ,  Hongbo Yan ,  Huaning Niu ,  Shengshan Cui ,  Sigen Ye ,  Wei Zeng ,  Weidong Yang ,  Yushu Zhang

IPC: H04W76/28 ,  H04W52/02 ,  H04W76/27

CPC classification number: H04W52/0229 ,  H04W76/27 ,  H04W76/28

Abstract: A user equipment (UE) receives reference signals during a discontinuous reception (DRX) cycle to perform frequency and timing tracking or automatic gain control (AGC). The UE receives configuration information corresponding to a reference signal that is to be transmitted to a user equipment (UE) when the UE is in a first operating state, receives the reference signal from a cell of a network when the UE is in the first operating state, performs one of frequency and timing tracking or automatic gain control (AGC) using the reference signal and receives a signal from the cell during a time window that the UE is scheduled to utilize an active mode of data exchange processing.

公开(公告)号：US20240106617A1

公开(公告)日：2024-03-28

申请号：US17935045

申请日：2022-09-23

Applicant: APPLE INC.

Inventor： Qunfeng He ,  Dietmar Gradl ,  Jie Cui ,  Hongbo Yan ,  Amir Farajidana ,  Yang Tang

IPC: H04L5/00 ,  H04W24/08

CPC classification number: H04L5/0096 ,  H04L5/0051 ,  H04W24/08

Abstract: Systems and methods provide multiple cell activation. A user equipment (UE) receives, from a wireless network, a command to activate multiple cells simultaneously. In response, the UE initiates cell activation procedures for the multiple cells. The cell activation procedures include waiting for an active transmission configuration indicator (TCI) indication. The UE monitors for the active TCI indication on any of the multiple cells. In response to receiving the active TCI indication on a first cell of the multiple cells, the UE determines one or more second cells of the multiple cells that share a same spatial relationship with the first cell according to one or more predetermined rule, and autonomously continues the cell activation procedures for the first cell and the one or more second cells.

公开(公告)号：US20230079512A1

公开(公告)日：2023-03-16

申请号：US17447831

申请日：2021-09-16

Applicant: APPLE INC.

Inventor： David Öhmann ,  Hongbo Yan ,  Amir Farajidana ,  Dietmar Gradl ,  Sami M. Almalfouh ,  Shengshan Cui

IPC: H04W76/28 ,  H04L5/00 ,  H04W56/00 ,  H04W72/04 ,  H04W52/02

Abstract: Systems and methods are provided for a user equipment (UE) to perform frequency offset (FO) delta tracking. For an anchor component carrier (CC), the UE wakes up to perform tracking updates on a plurality of successive DRX cycles. For the non-anchor CC, the UE determines a minimum update interval Δtupd, and schedules wake-ups on a first subset of the plurality of successive DRX cycles based on the minimum update interval Δtupd. For the first subset of the plurality of successive DRX cycles with scheduled wake-ups, the UE performs the tracking updates on the non-anchor CC and updates an FO delta between the anchor CC and the non-anchor CC. For a second subset of the plurality of successive DRX cycles without the scheduled wake-ups on the non-anchor CC, the UE applies the FO delta to correct for a frequency error.