公开(公告)号：US20230370966A1

公开(公告)日：2023-11-16

申请号：US18141878

申请日：2023-05-01

Applicant: Apple Inc.

Inventor： Tarakkumar G. Dhanani ,  Karan R. Sachdev ,  Rohit Thareja ,  Sanjeevi Balasubramanian ,  Sharad Garg ,  Vijay Gadde ,  Vijay Venkataraman

IPC: H04W48/20 ,  H04W74/08 ,  H04B17/309 ,  H04L5/14

CPC classification number: H04W48/20 ,  H04W74/0833 ,  H04B17/347 ,  H04L5/1469

Abstract: The present application relates to improving a roaming service. In an example, user equipment (UE) initiates a cell selection process to choose between a first cell and a second cell. The UE evaluates a first uplink (UL) channel condition of the first cell and a second UL channel condition of the second cell based on the initiation. The UE selects the first cell or the second cell based on the evaluated first UL channel condition and second UL channel condition. The UE initiates a random access channel (RACH) procedure based on the selected first cell or second cell.

公开(公告)号：US11540195B2

公开(公告)日：2022-12-27

申请号：US16834028

申请日：2020-03-30

Applicant: Apple Inc.

Inventor： Vijay Venkataraman ,  Amitabha Ghosh ,  Eyad Al-Shemali ,  Franco Travostino ,  Jinghua Ling ,  Lakshmi N. Kavuri ,  Muhammad R. Dar ,  Murtaza A. Shikari ,  Muthukumaran Dhanapal ,  Pankaj Subhash Vasandani ,  Ravish Samuel ,  Samuel J. Miller ,  Shivani Suresh Babu ,  Sree Ram Kodali ,  Srinivasan Nimmala ,  Srirang A. Lovlekar ,  Yifan Zhu ,  Irfan Khasim Mohammed ,  Sofheem Mohammed ,  Raghuram Mungara ,  Vijay Gadde ,  Sharad Garg

IPC: H04W36/30 ,  H04W76/10 ,  H04W24/08 ,  H04W36/00 ,  H04W36/08 ,  H04W76/19 ,  H04W80/12

Abstract: Apparatuses, systems, and methods for a wireless device to perform detection and mitigation of data stalls. The mitigation may occur during and/or at initiation of a data connection. The wireless device may establish a data connection(s) with a network over a Wi-Fi or cellular interface and monitor the data connection(s) for a data stall condition(s)/hint(s). The wireless device may perform a remedial action(s) responsive to detection of a data stall condition(s)/hint(s), including initiating a service recovery of the cellular interface, initiating a radio access technology (RAT) upgrade procedure, and/or initiating a handover procedure to a neighbor cell.

公开(公告)号：US11464065B2

公开(公告)日：2022-10-04

申请号：US16905620

申请日：2020-06-18

Applicant: APPLE INC.

Inventor： Tarakkumar G. Dhanani ,  Vijay Ventkataraman ,  Karan R. Sachdev ,  Neeraj R. Vaghela ,  Raghuram Mungara ,  Sharad Garg ,  Vijay Gadde

IPC: H04W76/25 ,  H04W76/27 ,  H04L5/00 ,  H04W24/08 ,  H04B17/318 ,  H04W24/10

Abstract: Systems and methods for extending connectivity with a cellular network are disclosed herein. A UE may monitor a serving cell of the UE and a neighbor cell of the UE to determine whether there is a network condition wherein the UE is to transition to an out-of-service (OOS) state if it were to fall to an Radio Resource Control (RRC) Idle state. The UE may react by, before expiration of an inactivity period corresponding to a transition to an RRC Idle mode, initiating signaling activity with a radio access network (RAN) node of the serving cell. In other embodiments, the UE may determine, based on a number of secondary devices connected to the UE, to initiate signaling with the RAN node of the serving cell before expiration of an inactivity period and according to whether a maximum number of extensions of an extension activity period has been reached.

公开(公告)号：US20130053093A1

公开(公告)日：2013-02-28

申请号：US13663342

申请日：2012-10-29

Applicant: Apple Inc.

Inventor： Giri Prassad Deivasigamani ,  Venkatasubramanian Ramasamy ,  Sharad Garg ,  Srinivasan Vasudevan

IPC: H04W36/24 ,  H04W24/02

CPC classification number: H04W36/08 ,  H04W24/08 ,  H04W36/30 ,  H04W36/36 ,  H04W48/20 ,  H04W64/003

Abstract: A method and apparatus for fast cell selection by a mobile wireless device. The mobile wireless device detects when a first wireless cell fails a set of stored suitability criteria and searches for and locates a set of candidate wireless cells to associate with. The mobile wireless device measures at least one received signal metric for each candidate wireless cell in the set of candidate wireless cells. When a candidate cell in the set of candidate wireless cells is identically the first wireless cell, the mobile wireless device evaluates the suitability of the candidate wireless cell using the stored set of suitability criteria for the first wireless cell and the measured at least one received signal metric for the candidate wireless cell. The mobile wireless communication device associates with the candidate wireless cell when the candidate wireless cell meets the stored set of suitability criteria.