System and method for reduction of handover interruption

    公开(公告)号:US11902877B2

    公开(公告)日:2024-02-13

    申请号:US17432258

    申请日:2020-02-24

    Applicant: Apple Inc.

    CPC classification number: H04W40/36 H04L69/22 H04W28/06 H04W36/023

    Abstract: Some embodiments of this disclosure include systems, apparatuses, methods, and computer-readable media for the reduction of handover interruptions. Some embodiments include a user equipment (UE) that supports simultaneous connectivity with a source 5G Node B (gNB) and a target gNB during a handover. Some embodiments include the UE receiving source path data packets from the source gNB and target path data packets from a target gNB. The UE performs a first reorder of the one or more source path data packets and the one or more target path data packets by sequence number (SN), and the UE performs header decompression on the reordered source path data packets, separately from the reordered target path data packets. After the header decompressions the UE performs a second reorder of the source path data packets and the target path data packets together by SN, and discards any duplicate data packets based on SNs.

    BUFFER STATUS REPORT ENHANCEMENTS FOR TCP FLOW

    公开(公告)号:US20220346193A1

    公开(公告)日:2022-10-27

    申请号:US17811526

    申请日:2022-07-08

    Applicant: APPLE INC.

    Abstract: Technology for a user equipment (UE), operable to generate an enhanced buffer status report (eBSR) is disclosed. The UE can identify packets for uplink transmission. The UE can filter the packets for uplink transmission, to identify a number of small packets pending for transmission and a number of larger packets, relative to the small packets, that are pending for transmission in the uplink transmission. The UE can encode the eBSR for transmission to a next generation node B (gNB), wherein the eBSR includes information identifying the number of small packets pending for transmission. The UE can have a memory interface configured to send to a memory the number of small packets pending for transmission.

    Signaling for inactive small data transmission without path switching

    公开(公告)号:US11985725B2

    公开(公告)日:2024-05-14

    申请号:US17438869

    申请日:2020-03-18

    Applicant: Apple Inc.

    CPC classification number: H04W76/27

    Abstract: Techniques, systems, and devices to support small data transfers are described. A first node, such as a gNodeB or an eNodeB, can perform operations that include receiving a resume request from a user equipment (UE) that is in an inactive state, the resume request including a small data indication, where context information for the UE resides at a second node; transmitting a retrieve UE context request to the second node, the retrieve UE context request including the small data indication; receiving a UE context response from the second node; transmitting, by the first node, a resume response to the UE to cause the UE to switch to a connected state; processing uplink data from the UE; and transmitting a release message to the UE to cause the UE to switch to the inactive state. The release message can be based on RRC release information received from the second node.

    PDCP packet-based DDDS frame transmission

    公开(公告)号:US11729658B2

    公开(公告)日:2023-08-15

    申请号:US17315952

    申请日:2021-05-10

    Applicant: Apple Inc.

    CPC classification number: H04W28/0263 H04W28/04 H04W80/02 H04W88/085 H04W92/12

    Abstract: Systems and methods of providing feedback when a specific PDU is successfully delivered or transmitted are described. The node hosting PDCP entity indicates triggering of a DDDS frame from the remote corresponding node. Rather than immediately triggering transmission of a DDDS frame, the node hosting PDCP entity indicates triggering based on successful delivery of a PDU having a specific SN, as long as in-sequence delivery or transmission of PDUs up to the specific SN was successful. The DDDS frame is transmitted once the corresponding node determines that the PDU having the SN was successfully delivered or transmitted. After reporting by the DDDS frame, the QoS flow associated with the PDUs is remapped from a source DRB to a target DRB.

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