公开(公告)号：US11218924B2

公开(公告)日：2022-01-04

申请号：US16479628

申请日：2018-08-28

Applicant: Apple Inc.

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

IPC: H04W36/00 ,  H04W12/04 ,  H04W36/02 ,  H04W40/36 ,  H04W36/18

Abstract: Techniques are disclosed relating to handover between cellular base stations. In some embodiments that use dual-connectivity handover, disclosed techniques may facilitate synchronization of a security configuration switch. In some embodiments, the base station and/or mobile device determine activation sequence numbers for the security configuration switch (e.g., by estimating when a path switch will occur). In some embodiments, the security configuration switch is implicitly detected based in deciphering failure. In some embodiments, the security configuration switch is explicitly signaled and is checked based on deciphering failure. In some embodiments that use make before break handover techniques, a source base station may be retained after the path switch.

公开(公告)号：US20210368318A1

公开(公告)日：2021-11-25

申请号：US16500846

申请日：2018-08-07

Applicant: Apple Inc.

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

IPC: H04W4/90 ,  H04W4/12 ,  H04W68/00

Abstract: This disclosure relates to detecting duplicate public warning system messages in a cellular communication system. A wireless device may receive a public warning system indication from a cellular base station during a paging occasion. The public warning system indication may indicate that system information provided by the cellular base station includes a public warning system message. The wireless device may determine whether the public warning system message is a duplicate public warning system message. The wireless device may determine whether to decode the system information including the public warning system message based at least in part on whether the public warning system message is a duplicate public warning system message. The system information including the public warning system message may not be decoded if the public warning system message is determined to be a duplicate public warning system message.

公开(公告)号：US20210360674A1

公开(公告)日：2021-11-18

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：US11178547B2

公开(公告)日：2021-11-16

申请号：US16293521

申请日：2019-03-05

Applicant: Apple Inc.

Inventor： Xiangying Yang ,  Shu Guo ,  Lijia Zhang ,  Qian Sun ,  Huarui Liang ,  Fangli Xu ,  Yuqin Chen ,  Haijing Hu ,  Dawei Zhang ,  Hao Duo ,  Lanpeng Chen

IPC: H04W12/10 ,  H04W72/04 ,  H04W12/106 ,  H04L9/32 ,  H04W74/00 ,  H04W12/069 ,  H04W12/0433 ,  H04W72/00

Abstract: Techniques for identity-based message integrity protection and verification between a user equipment (UE) and a wireless network entity, include use of signatures derived from identity-based keys. To protect against attacks from rogue network entities before activation of a security context with a network entity, the UE verifies integrity of messages by checking a signature using an identity-based public key PKID derived by the UE based on (i) an identity value (ID) of the network entity and (ii) a separate public key PKPKG of a private key generator (PKG) server. The network entity generates signatures for messages using an identity-based private key SKID obtained from the PKG server, which generates the identity-based private key SKID using (i) the ID value of the network entity and (ii) a private key SKPKG that is known only by the PKG server and corresponds to the public key PKPKG.

公开(公告)号：US20210345455A1

公开(公告)日：2021-11-04

申请号：US16478951

申请日：2018-08-03

Applicant: Apple Inc.

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

IPC: H04W88/18 ,  H04W68/00 ,  H04W52/02

Abstract: A device may operate within a specified frequency band within a specified coverage area of a wireless cellular network served by a cell. The device may monitor, during a cell-specific paging window, paging messages transmitted by the cell within the cell-specific paging window to devices operating within the specified coverage area and targeted to receive paging messages. The device may enter an idle state if the monitoring indicates that the paging messages do not include a respective paging message intended for the device. If the monitoring indicates that the paging messages include a paging message intended for the device, the device may process the paging message. Furthermore, the device may indicate to the cell, when attaching to the cell, whether the device has a capability to support standalone operation within the specified frequency band. If the indication is that the device does not support such standalone operation, the cell may not issue paging messages to the device.

公开(公告)号：US11166336B2

公开(公告)日：2021-11-02

申请号：US16264885

申请日：2019-02-01

Applicant: Apple Inc.

Inventor： Sethuraman Gurumoorthy ,  Srirang A. Lovlekar ,  Murtaza A. Shikari ,  Srinivasan Nimmala ,  Haijing Hu ,  Fangli Xu ,  Yuqin Chen ,  Longda Xing ,  Xu Ou ,  Li Su ,  Vijay Venkataraman ,  Dawei Zhang ,  Muthukumaran Dhanapal ,  Sree Ram Kodali ,  Srinivas Burugupalli

IPC: H04W76/27 ,  H04W76/28 ,  H04W76/38

Abstract: This disclosure relates to performing implicit radio resource control state transitions in a cellular communication system. A wireless device may establish a radio resource control (RRC) connection with a cellular base station. A data inactivity timer length and a target RRC state for implicit RRC transitions may be determined. A data inactivity timer having the determined data inactivity timer length may be initiated. It may be determined that the data inactivity timer has expired. The wireless device may transition to the target RRC state based at least in part on determining that the data inactivity timer has expired.

公开(公告)号：US20210251015A1

公开(公告)日：2021-08-12

申请号：US17174315

申请日：2021-02-11

Applicant: Apple Inc.

Inventor： Chunhai Yao ,  Haitong Sun ,  Chunxuan Ye ,  Dawei Zhang ,  Fangli Xu ,  Haijing Hu ,  Hong He ,  Jie Cui ,  Oghenekome Oteri ,  Weidong Yang ,  Wei Zeng ,  Yang Tang ,  Yuchul Kim ,  Yuqin Chen ,  Yushu Zhang

IPC: H04W74/08 ,  H04W72/04 ,  H04W76/27

Abstract: The implementations disclosed provide apparatus, systems, and methods for channel structure construction for a two-step random access channel (RACH) using a new radio (NR) user equipment (UE) wireless device. The wireless device includes one or more computer processors configured to generate a physical RACH (PRACH) preamble mapped to a physical uplink shared channel (PUSCH) resource unit. The PRACH preamble is associated with a preamble group indicating a configuration of the PUSCH. The preamble group has a size indicated by radio resource control (RRC) signaling performed by the wireless device. A message is encoded including the PRACH preamble and a payload carried by the PUSCH. The configuration of the PUSCH includes parameters for decoding the message. The wireless device couples communicatively to a base station using the PUSCH. The message is transmitted to the base station. The base station decodes the message based on the parameters of the PUSCH configuration.

公开(公告)号：US20210100022A1

公开(公告)日：2021-04-01

申请号：US17024215

申请日：2020-09-17

Applicant: Apple Inc.

Inventor： Yushu Zhang ,  Haitong Sun ,  Wei Zeng ,  Hong He ,  Yuchul Kim ,  Dawei Zhang ,  Haijing Hu ,  Yakun Sun

IPC: H04W72/12 ,  H04W72/04 ,  H04L1/00

Abstract: Apparatuses, systems, and methods for providing downlink control for multi-TRP transmission. A cellular base station may provide a downlink control information transmission to a wireless device scheduling downlink transmissions to the wireless device from multiple transmission reception points. The downlink control information may include information that can be used by the wireless device to determine any or all of physical resource block bundling sizes, frequency domain resource allocations, modulation and coding schemes, redundancy versions, phase tracking reference signal configurations, and any of various other possible types of configuration information for the downlink transmissions. The wireless device may receive the downlink transmissions from the plurality of transmission reception points in accordance with the downlink control information.

公开(公告)号：US20210051748A1

公开(公告)日：2021-02-18

申请号：US16858142

申请日：2020-04-24

Applicant: Apple Inc.

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

IPC: H04W76/16 ,  H04W76/27 ,  H04W8/24 ,  H04W8/18

Abstract: Apparatuses, systems, and methods for a user equipment device (UE) to perform intra-UE co-existence between non-stand-alone (NSA) and stand-alone (SA) mode. The UE may be configured to connect to a first radio access network (RAN) operating according to a first radio access technology (RAT) via a first radio and connect to a second RAN operating according to a second RAT via a second radio. The UE may provide, to the first RAN, configuration information during a radio resource control (RRC) connection procedure. The configuration information may indicate a dual connectivity status of the UE. The dual connectivity status may include indication disabling (enabling) dual connectivity for the UE, working frequencies associated with the second RAN, and/or configurations associated with the second RAN. The UE may receive, from the first RAN, a dual connectivity configuration that may be based on the dual connectivity status of the UE and operate accordingly.

公开(公告)号：US20210051534A1

公开(公告)日：2021-02-18

申请号：US16985952

申请日：2020-08-05

Applicant: Apple Inc.

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

IPC: H04W36/00 ,  H04W36/08 ,  H04W36/38

Abstract: This disclosure relates to techniques for performing consecutive conditional handovers. A cellular base station may provide conditional handover information for multiple conditional handovers to a wireless device. The conditional handover information may include information for performing a conditional handover from a cell provided by the cellular base station to at least one cell, and information for performing a conditional handover from one or more of those cells to at least one cell. The wireless device may perform multiple consecutive conditional handovers using the conditional handover information.