ROHC header compression for MPTCP

    公开(公告)号:US11445047B2

    公开(公告)日:2022-09-13

    申请号:US16084658

    申请日:2017-09-29

    Applicant: Apple Inc.

    Abstract: Some embodiments relate to a user equipment device (UE), and associated methods for performing ROHC header compression on TCP packets with MPTCP option enabled. In some embodiments, a compressor may determine that a first portion of the stream of data packets is formatted according to the transmission control protocol (TCP) with a multipath TCP (MPTCP) option enabled. The compressor may establish context with a corresponding decompressor and may operate in one of three modes of compression based on the context. In some embodiments, when the context indicates that the corresponding decompressor supports decompression of TCP data packets with MPTCP option enabled, the compressor may operate in a first or second mode of compression. In some embodiments, when the context indicates that the corresponding decompressor does not support decompression of TCP data packets with MPTCP option enabled, the compressor may operation in a third mode of compression.

    POWER SAVING OPTIMIZATION FOR HIGH-MOBILITY SCENARIOS

    公开(公告)号:US20240107613A1

    公开(公告)日:2024-03-28

    申请号:US18371771

    申请日:2023-09-22

    Applicant: Apple Inc.

    CPC classification number: H04W76/20 H04W28/082

    Abstract: Disclosed are methods, systems, and computer-readable medium to perform operations including: determining that a user equipment (UE) is connected to a cell of a network using a connection in a standalone (SA) mode; based on determining a bandwidth part (BWP) of the connection, accessing a physical cell identifier (PCI) list associated with the UE for a time period; based on the number of PCI values in the list and a duration of the time period, assigning, to a BWP switch timer, a timeout value; initiating the BWP switch timer; and in response to determining that the handover of the UE to the different cell of the network occurs prior to the BWP switch timer reaching the timeout value, causing the UE to switch to a LTE mode.

    SYSTEMS AND METHODS FOR CONNECTED MODE DISCONTINUOUS RECEPTION ON/OFF DETERMINATIONS

    公开(公告)号:US20240098639A1

    公开(公告)日:2024-03-21

    申请号:US17933923

    申请日:2022-09-21

    Applicant: APPLE INC.

    CPC classification number: H04W52/0232 H04L1/0061 H04W76/28

    Abstract: Systems and methods related to “on/off” determinations regarding the performance of physical downlink control channel (PDCCH) monitoring during connected mode discontinuous reception (CDRX) on duration windows are disclosed herein. In some cases, a radio access network (RAN) predicts whether a downlink (DL) packet for a UE will arrive at a buffer of the RAN prior to an end of a CDRX on duration window of the UE, and sends a downlink control information (DCI) with a cyclic redundancy check (CRC) scrambled by a power-saving radio network temporary identifier (PS-RNTI) (DCP) for the CDRX on duration window indicating whether or not the UE should perform PDCCH monitoring during the CDRX on duration window based on the prediction. In some cases, a UE determines a current state of DL traffic and adaptively uses DCP monitoring based on the current state of the traffic. Aggregation level adaptation by the RAN is also discussed.

    ROHC header compression for MPTCP

    公开(公告)号:US11824959B2

    公开(公告)日:2023-11-21

    申请号:US17888331

    申请日:2022-08-15

    Applicant: Apple Inc.

    Abstract: Systems, methods, and mechanisms for performing ROHC header compression on TCP packets with MPTCP option enabled. A compressor may determine that a first portion of the stream of data packets is formatted according to the transmission control protocol (TCP) with a multipath TCP (MPTCP) option enabled. The compressor may establish context with a corresponding decompressor and may operate in one of three modes of compression based on the context. In some embodiments, when the context indicates that the corresponding decompressor supports decompression of TCP data packets with MPTCP option enabled, the compressor may operate in a first or second mode of compression. In some embodiments, when the context indicates that the corresponding decompressor does not support decompression of TCP data packets with MPTCP option enabled, the compressor may operation in a third mode of compression.

    Systems and Methods for Standalone Carrier Aggregation Handover

    公开(公告)号:US20230088031A1

    公开(公告)日:2023-03-23

    申请号:US17947003

    申请日:2022-09-16

    Applicant: Apple Inc.

    Abstract: A wireless network may include a PCELL base station, an SCELL base station, and user equipment (UE) that communicate using standalone carrier aggregation. The UE may receive PCELL signals during first measurement periods, may perform first measurements on the PCELL signals, may receive SCELL signals during second measurement periods, and may perform second measurements on the SCELL signals. When a scheduled reporting time approaches, the UE may compare a duration between a most recent of the second measurement periods and the reporting time to a threshold. If the duration is less than the threshold, the UE may include the most recent second measurement in a measurement report transmitted at the scheduled reporting time. When the duration exceeds the threshold, the receiver may perform a third measurement on the SCELL signals during an unscheduled period prior to the reporting time and may include the third measurement in the measurement report.

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