公开(公告)号：US20220256490A1

公开(公告)日：2022-08-11

申请号：US17731578

申请日：2022-04-28

Applicant: Apple Inc.

Inventor： Yuqin Chen ,  Haijing Hu ,  Fangli Xu ,  Dawei Zhang

IPC: H04W56/00 ,  H04W72/12 ,  H04W74/08

Abstract: Techniques are disclosed relating to reporting channel state information (CSI) when synchronization state is altered. In some embodiments, a UE starts a timing alignment timer (TAT) in response to a time alignment command (TAC) from a cellular network for one or more serving cells. In some embodiments, the UE stores a configuration for a semi-persistent (SP) channel state information (CSI) report for the apparatus over a physical uplink shared channel (PUSCH). In some embodiments, the UE activates the SP-CSI report based on downlink control information (DCI) from the network. In some embodiments, the UE transmits one or more SP-CSI reports according to the configuration. In some embodiments, in response to expiration of the TAT, the UE deactivates all active stored configurations of SP-CSI reports that use the PUSCH and that correspond to the one or more serving cells. In some embodiments, this may avoid collisions with PUSCH transmissions from other UEs, e.g., when the UE returns to an in-sync state.

公开(公告)号：US11330538B2

公开(公告)日：2022-05-10

申请号：US16345397

申请日：2018-05-10

Applicant: Apple Inc.

Inventor： Yuqin Chen ,  Haijing Hu ,  Fangli Xu ,  Dawei Zhang

IPC: H04W56/00 ,  H04W72/12 ,  H04W74/08

Abstract: Techniques are disclosed relating to reporting channel state information (CSI) when synchronization state is altered. In some embodiments, a UE starts a timing alignment timer (TAT) in response to a time alignment command (TAC) from a cellular network for one or more serving cells. In some embodiments, the UE stores a configuration for a semi-persistent (SP) channel state information (CSI) report for the apparatus over a physical uplink shared channel (PUSCH). In some embodiments, the UE activates the SP-CSI report based on downlink control information (DCI) from the network. In some embodiments, the UE transmits one or more SP-CSI reports according to the configuration. In some embodiments, in response to expiration of the TAT, the UE deactivates all active stored configurations of SP-CSI reports that use the PUSCH and that correspond to the one or more serving cells. In some embodiments, this may avoid collisions with PUSCH transmissions from other UEs, e.g., when the UE returns to an in-sync state.

公开(公告)号：US11317375B2

公开(公告)日：2022-04-26

申请号：US16892031

申请日：2020-06-03

Applicant: Apple Inc.

Inventor： Sethuraman Gurumoorthy ,  Dawei Zhang ,  Fangli Xu ,  Haijing Hu ,  Longda Xing ,  Murtaza Shikari ,  Muthukumaran Dhanapal ,  Sree Ram Kodali ,  Srinivasan Nimmala ,  Srirang A. Lovlekar ,  Vijay Venkataraman ,  Yaoqi Yan ,  Yuqin Chen ,  Zhiwei Wang

IPC: H04W68/02 ,  H04W72/12 ,  H04W88/06

Abstract: This disclosure relates to systems, apparatuses, and methods for coordinating communication and avoiding and/or mitigating collisions for multi-subscriber identity module devices in a wireless communication system. A wireless device may coordinate communication associated with different subscriber identity modules and/or may mitigate collisions between communications associated with different subscriber identity modules. A network may provide information to improve coordination and/or mitigate collisions. A network may adjust paging schedules and/or provision of alert messages to improve coordination.

公开(公告)号：US20220124866A1

公开(公告)日：2022-04-21

申请号：US17562685

申请日：2021-12-27

Applicant: Apple Inc.

Inventor： Fangli Xu ,  Haijing Hu ,  Dawei Zhang ,  Longda Xing ,  Murtaza A. Shikari ,  Sethuraman Gurumoorthy ,  Sree Ram Kodali ,  Srinivasan Nimmala ,  Srirang A. Lovlekar ,  Xu Ou ,  Yuqin Chen

IPC: H04W76/27 ,  H04W76/10 ,  H04W68/00 ,  H04W74/08 ,  H04W36/04 ,  H04W36/00 ,  H04L69/28

Abstract: This disclosure relates to performing data communication while in an inactive state in a cellular communication system.

公开(公告)号：US11284428B2

公开(公告)日：2022-03-22

申请号：US16499178

申请日：2018-08-10

Applicant: Apple Inc.

Inventor： Junsung Lim ,  Wei Zhang ,  Sami M. Almalfouh ,  Johnson O. Sebeni ,  Yuchul Kim ,  Wei Zeng ,  Haitong Sun ,  Pengkai Zhao ,  Ping Wang ,  Dawei Zhang ,  Fangli Xu ,  Yuqin Chen ,  Haijing Hu

IPC: H04W72/12 ,  H04L5/00 ,  H04W52/02

Abstract: A device may monitor a first search space (SS) corresponding to an active first component carrier (CC), and detect first control information (CI) that identifies an inactive second CC. In response to receiving the first CI, the device may activate the inactive second CC to make it an active second CC. The device may also set up a second SS corresponding to the active second CC, and may monitor the second SS to schedule the active second CC and receive a physical data channel. The first CI may also include additional scheduling information and a start time for reception of the physical data channel. The device may operate in a first bandwidth part (BWP) according to a first communication configuration associated with the first bandwidth part, and may switch to operating in a second BWP and to operating according to a second communication configuration associated with the second BWP.

公开(公告)号：US20220086710A1

公开(公告)日：2022-03-17

申请号：US17534214

申请日：2021-11-23

Applicant: Apple Inc.

Inventor： Fangli Xu ,  Dawei Zhang ,  Haijing Hu ,  Murtaza A. Shikari ,  Sethuraman Gurumoorthy ,  Sree Ram Kodali ,  Srinivasan Nimmala ,  Srirang A. Lovlekar ,  Longda Xing ,  Xu Ou ,  Yuqin Chen

IPC: H04W36/00 ,  H04W36/30 ,  H04W48/16 ,  H04W88/06

Abstract: Apparatuses, systems, and methods for a wireless device to perform master cell group failure recovery in a dual connectivity cellular communication system. The wireless device may establish a first wireless link to a cellular network via a first cell group. The first cell group may be configured as a master cell group for the wireless device. The wireless device may establish a second wireless link to the cellular network via a second cell group. The second cell group may be configured as a secondary cell group for the wireless device. The wireless device may determine that link failure for the first wireless link has occurred. The wireless device may perform master cell group link failure recovery using the second wireless link based at least in part on the link failure for the first wireless link.

公开(公告)号：US20210368565A1

公开(公告)日：2021-11-25

申请号：US15734516

申请日：2019-11-04

Applicant: Apple Inc.

Inventor： Zhibin Wu ,  Clive E. Rodgers ,  Dawei Zhang ,  Fangli Xu ,  Haijing Hu ,  Hong He ,  Longda Xing ,  Murtaza A. Shikari ,  Sethuraman Gurumoorthy ,  Sree Ram Kodali ,  Srinivasan Nimmala ,  Srirang A. Lovlekar ,  Vijay Venkataraman ,  Yuqin Chen

IPC: H04W76/15 ,  H04W76/14 ,  H04W76/18

Abstract: Peer devices may wirelessly communicate with each other over a bidirectional sidelink logical channel (LCH) through an established bidirectional sidelink radio bearer. An initiating device of the peer devices may dynamically select a logical channel ID for establishing a fully bidirectional or semi-bidirectional SLRB. At least two alternative sidelink radio resource control (PC5-RRC) procedures may ensure the SLRB parameters are configured correctly in the established logical channel. The procedures also allow the network to configure a limited SLRB which is used to couple the SLRB configuration in the direction in which limited traffic (e.g. feedback information such as robust header compression feedback and/or status reports) is transmitted.

公开(公告)号：US20210368400A1

公开(公告)日：2021-11-25

申请号：US16487039

申请日：2018-08-28

Applicant: Apple Inc.

Inventor： Fangli Xu ,  Dawei Zhang ,  Haijing Hu ,  Longda Xing ,  Murtaza A. Shikari ,  Sethuraman Gurumoorthy ,  Sree Ram Kodali ,  Srinivasan Nimmala ,  Srirang A. Lovlekar ,  Xu Ou ,  Yuqin Chen

IPC: H04W36/00 ,  H04W36/32 ,  H04W48/20

Abstract: This disclosure relates to techniques for supporting cell set based mobility. A network may provide configuration information to a wireless device, relating to a current cell and possibly to one or more other cells in one or more cell sets. The wireless device and network may take various measurements. In response to the measurements and the configuration information, the wireless device may perform a cell change to one of the other cells.

公开(公告)号：US20210360495A1

公开(公告)日：2021-11-18

申请号：US17286393

申请日：2018-11-01

Applicant: Apple Inc.

Inventor： Srirang A. Lovlekar ,  Srinivasan Nimmala ,  Haijing Hu ,  Fangli Xu ,  Yuqin Chen ,  Longda Xing ,  Dawei Zhang ,  Murtaza A. Shikari ,  Sethuraman Gurumoorthy

IPC: H04W36/00 ,  H04W36/08 ,  H04W36/30

Abstract: This disclosure relates to techniques for performing conditional handovers and cell re-selections along known routes. A cellular base station may select a conditional handover set for a wireless device. The conditional handover set may include information for multiple conditional handovers. The wireless device may receive the conditional handover set. The wireless device may perform conditional handover to at least a first cell indicated in the conditional handover set based at least in part on the conditional handover set.

公开(公告)号：US20210352582A1

公开(公告)日：2021-11-11

申请号：US16480784

申请日：2018-08-10

Applicant: Apple Inc.

Inventor： Wei Zeng ,  Dawei Zhang ,  Haitong Sun ,  Wei Zhang ,  Tianyan Pu ,  Yuchul Kim ,  Yuqin Chen ,  Farouk Belghoul ,  Haijing Hu ,  Fangli Xu ,  Sami M. Almalfouh

IPC: H04W52/02 ,  H04W74/08 ,  H04W74/00 ,  H04W72/04

Abstract: This disclosure relates to using a wake up signal in conjunction with cellular communication in unlicensed spectrum. A cellular base station may provide a wake up signal on an unlicensed frequency channel after successful completion of a listen-before-talk procedure. The wake up signal may include a preamble configured for coherent detection, and information indicating channel occupancy time for a cellular communication by the cellular base station and a cell identifier for the cellular base station. A wireless device may monitor the unlicensed frequency channel for a wake up signal, and may determine whether to monitor the unlicensed frequency channel for control channel signaling based on whether a wake up signal is received, and potentially also based on the contents of the wake up signal if a wake up signal is received.