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    TECHNIQUES FOR EMERGENCY SERVICE FALL BACK ERROR HANDLING
    2.
    发明申请
    TECHNIQUES FOR EMERGENCY SERVICE FALL BACK ERROR HANDLING 审中-公开

    公开(公告)号：WO2022098475A2

    公开(公告)日：2022-05-12

    申请号：PCT/US2021/054528

    申请日：2021-10-12

    Applicant: APPLE INC.

    Inventor： RAMAPPA, Shashanka Totadamane ,  KISS, Krisztian ,  CHERIPALLY, Madhusudhan ,  LEE, Michael ,  PANGI, Pradeep ,  KRISHNAPERUMAL, Rajkumar ,  PRAKASAM, Sridhar

    IPC: H04W76/18 ,  H04W76/50

    Abstract: A technique for establishing a voice call including receiving an indication that the first wireless system supports emergency service fallback, receiving an indication to establish an emergency voice call, transmitting an emergency service request to the first wireless system, determining that an unexpected error has occurred, selecting a second wireless system based on the determination that the unexpected error has occurred, and connecting to the second wireless system to complete the emergency voice call. Additionally, a technique for cancelling a voice call including receiving an indication that the first wireless system supports emergency service fallback, receiving an indication to establish an emergency voice call, transmitting an emergency service request to the first wireless system, receiving an indication to cancel the emergency voice call, and cancelling a connection to a second wireless system.

    OPTIMIZING USE OF PDU SESSION STATUS IE
    3.
    发明申请
    OPTIMIZING USE OF PDU SESSION STATUS IE 审中-公开

    公开(公告)号：WO2022099230A1

    公开(公告)日：2022-05-12

    申请号：PCT/US2021/071362

    申请日：2021-09-03

    Applicant: APPLE INC.

    Inventor： KOSHTA, Nirlesh ,  KUMAR, Anikethan Ramakrishna Vijaya ,  KUMAR, Basant ,  KISS, Krisztian ,  PRAKASAM, Sridhar ,  PANGI, Pradeep

    IPC: H04W60/00 ,  H04W48/18

    Abstract: Systems and methods for managing synchronization of protocol data unit (PDU) sessions between a user equipment (UE) and a network are disclosed herein. In some embodiments, a determination of whether a message comprising a PDU session status information element (IE) should be sent is based on previous messaging between peer entities of the network. In some embodiments, a determination that the peer entity is informed of a relevant PDU session status is made after expected reply messaging is received in response to prior messaging. In some cases, a reply message without a PDU session status IE is sent from one entity to a peer entity when it is determined that each entity has a matching PDU session status. Cases involving failures detected at the network, and cases where an entity activates a data radio bearer (DRB) of a PDU session that is inactive at its peer are also discussed.

    TRACKING AREA IDENTIFIER (TAI) CHANGE DURING AUTHENTICATION REQUEST PROCESSING
    4.
    发明申请
    TRACKING AREA IDENTIFIER (TAI) CHANGE DURING AUTHENTICATION REQUEST PROCESSING 审中-公开

    公开(公告)号：WO2021207084A1

    公开(公告)日：2021-10-14

    申请号：PCT/US2021/025798

    申请日：2021-04-05

    Applicant: APPLE INC.

    Inventor： KOSHTA, Nirlesh ,  KISS, Krisztian ,  PANGI, Pradeep ,  PRAKASAM, Sridhar ,  VENKATARAMAN, Vijay

    IPC: H04W12/06

    Abstract: Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive a first authentication request in response to a first triggering request from the UE to a mobility management node of a first Tracking Area (TA) in which the UE is located. In some embodiments, the UE may prepare and store an authentication response according to the first authentication request. In response to determining that the UE has moved from the first TA to a second TA, the UE may abort a sending of the authentication response, and may send the stored authentication response according to the first authentication request to the mobility management node of the second TA in response to the receipt of the second authentication request and in further response to a determination that a given parameter of each of the first and second authentication requests are the same.

    METHOD AND APPARATUSES FOR CALL PERFORMANCE IMPROVEMENT DURING IRAT RE-SELECTION PROCEDURE
    7.
    发明公开
    METHOD AND APPARATUSES FOR CALL PERFORMANCE IMPROVEMENT DURING IRAT RE-SELECTION PROCEDURE 审中-公开

    公开(公告)号：EP4142420A1

    公开(公告)日：2023-03-01

    申请号：EP22192230.5

    申请日：2022-08-25

    Applicant: Apple Inc.

    Inventor： SINGH, Ashish Kumar ,  GUPTA, Anshul Kumar ,  GOLDHOFER, Franz ,  PANGI, Pradeep ,  JEFFERY, Mark ,  VENUGOPAL, Avinash

    IPC: H04W76/10 ,  H04W48/18 ,  H04W88/06

    Abstract: Methods, apparatuses, and systems are disclosed for reducing latency during IRAT re-selection in the presence of race conditions. When a UE initiates an IRAT re-selection procedure, and concurrently initiates a call setup procedure, a race condition may result, in which the UE's NAS layer prioritizes the call setup procedure, while the RRC layer prioritizes the IRAT re-selection procedure. This may result in failure of the call setup procedure, which may lead to a user needing to re-initiate the call, resulting in poor user experience and significant latency. To prevent this, the UE may cache a message and/or other information relevant to the call setup procedure, until the IRAT re-selection procedure is complete. The UE may then proceed to complete the call setup procedure. The message may be cached, e.g., at the NAS layer or the RRC layer of the cellular modem, or by an application processor.

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