公开(公告)号：US20220124723A1

公开(公告)日：2022-04-21

申请号：US17432827

申请日：2020-02-24

Applicant: Apple Inc.

Inventor： Qiming LI ,  Jie CUI ,  Yang TANG ,  Yuhan ZHOU ,  Shuang TIAN

IPC: H04W72/08

Abstract: A system, method, and apparatus is provided for performing carrier aggregation (CA) radio resource management (RRM). The system, method, and apparatus can receive a configuration message having configuration information from an access node; determine a measurement period for a secondary cell (SCell) and a cell identification delay based upon the configuration information; identify a new detectable cell on a secondary component carrier (SCC) as the SCell within the cell identification delay; perform a measurement for a CA operation within the measurement period; and report the measurement to the access node. The configuration message can be a Radio Resource Control (RRC) message. The measurement for the CA operation can be a measurement of the SCell on the SCC. The system, method, and apparatus can multiply a measurement control parameter by a factor less than five (5) to determine the measurement period and can multiply a measurement control parameter by a factor less than twenty (20) to determine the cell identification delay. The system, method, and apparatus can further perform an action with respect to the SCell in response to the measurement.

公开(公告)号：US20220191812A1

公开(公告)日：2022-06-16

申请号：US17436474

申请日：2020-03-06

Applicant: Apple Inc.

Inventor： Qiming LI ,  Jie CUI ,  Yang Tang ,  Yuhan ZHOU ,  Shuang TIAN

IPC: H04W56/00 ,  H04W4/02

Abstract: A method for enhanced autonomous uplink timing adjustment includes determining that a user equipment (UE) is traveling above a predetermined velocity. In response to the determination that the UE is traveling above the predetermined velocity, a maximum aggregate adjustment rate to an uplink timing for the UE and a maximum amount of a magnitude of a timing change to the uplink timing for the UE are determined. The uplink timing for the UE is adjusted based on the maximum aggregate adjustment rate and the maximum amount of the magnitude of the timing change.

公开(公告)号：US20220132344A1

公开(公告)日：2022-04-28

申请号：US17431286

申请日：2020-02-21

Applicant: Apple Inc.

Inventor： Yuhan ZHOU ,  Qiming LI ,  Shuang TIAN ,  Jie CUI ,  Rui HUANG ,  Yang TANG

IPC: H04W24/08 ,  H04L1/20

Abstract: Some embodiments of this disclosure include systems, apparatuses, methods, and computer-readable media for use in a wireless network for radio link monitoring for high speed user equipment (UE). For example, some embodiments are directed to a user equipment (UE) including radio front end circuitry and processor circuitry coupled to the radio front end circuitry. The processor circuitry can be configured to monitor a downlink associated with a cell using a reference signal and estimate a downlink radio link quality associated with the downlink. The processor circuitry can further be configured to compare the estimated downlink radio link quality with a threshold. The processor circuitry can further be configured to trigger an out-of-sync operation in response to the downlink radio link quality being worse than the threshold. The threshold can include a value less than 10%.

公开(公告)号：US20220240110A1

公开(公告)日：2022-07-28

申请号：US17439202

申请日：2020-03-27

Applicant: Apple Inc.

Inventor： Qiming LI ,  Yuhan ZHOU ,  Jie CUI ,  Yang TANG ,  Shuang TIAN

IPC: H04W24/08 ,  H04W24/10

Abstract: In a communication system comprising user equipment (UE) and a radio access network (RAN) comprising a plurality of cells is configured for receiving, by the UE, a radio resource control (RRC) information element (IE) indicating a high speed scenario (HST); and monitoring, by the UE in response to receiving the RRC IE indicating HST, a first number of frequency carriers that is reduced relative to a second number of frequency carriers monitored by the UE during a non-HST.

公开(公告)号：US20220182951A1

公开(公告)日：2022-06-09

申请号：US17432894

申请日：2020-02-21

Applicant: Apple Inc.

Inventor： Yuhan ZHOU ,  Qiming LI ,  Shuang TIAN ,  Jie CUI ,  Rui HUANG ,  Yang TANG

IPC: H04W56/00 ,  H04W24/10 ,  H04W52/52 ,  H04W4/06

Abstract: This disclosure provides techniques for activation of a secondary cell by a user equipment (UE) operating in a wireless network. For example, a UE receives a command to activate a secondary cell of the wireless network for wireless communication, and determines whether timing information is known by the UE for the secondary cell. Based on the determination, the UE performs a first secondary cell activation within first time period based on the timing information being known, or performs a second secondary cell activation within a second time period based on the timing information being unknown. After which, the UE wirelessly communicate data over the wireless network using the secondary cell, based on the secondary cell being activated.