Congestion control for vehicular-to-anything services

    公开(公告)号:US10779189B2

    公开(公告)日:2020-09-15

    申请号:US15754531

    申请日:2016-04-01

    Applicant: Apple Inc.

    Abstract: Methods and apparatus for communicating in a wireless network supporting vehicle-to-anything (V2X) communication including a terminal comprising: transceiver circuitry to communicate via uplink and downlink radio interface with a radio access network of a wireless communication network and communicate directly via sidelink radio interface with one or more out of a vehicle terminal and/or a roadside unit; and control circuitry coupled to the transceiver circuitry to determine one or more indicator related to the apparatus and/or surrounding environment and control the transceiver circuitry to control communication over the sidelink radio interface based on the determined one or more indicator to control congestion on V2X spectrum resources.

    ENHANCED PHYSICAL STRUCTURE FOR LTE V2V COMMUNICATIONS

    公开(公告)号:US20230075631A1

    公开(公告)日:2023-03-09

    申请号:US17894238

    申请日:2022-08-24

    Applicant: Apple Inc.

    Abstract: A vehicle may wirelessly communicate with another vehicle via a physical channel (a vehicle-to-vehicle (V2V) channel) that is robust and reliable under high mobility propagation conditions. The physical channel may be created by modifying an existing long-term evolution (LTE) physical channel, such as an LTE sidelink (SL) channel. For instance, the V2V physical channel may be created by increasing, by a particular factor, the subcarrier spacing of legacy LTE channels (e.g., from 15 kilohertz (kHz) to 30 kHz). Additionally, a symbol duration and a fast physical channel may each be reduced by Fourier transform (FFT) size for the V2V the same factor. Doing so may enable the V2V physical channel to be implemented without significant modifications to other aspects of the LTE standard.

    V2X Performance Enhancements in High Speed Environments

    公开(公告)号:US20230050470A1

    公开(公告)日:2023-02-16

    申请号:US17864316

    申请日:2022-07-13

    Applicant: Apple Inc.

    Abstract: Implementations of this disclosure generally may relate to the field of wireless communications. More specifically, implementations described in this disclosure relate to different 3GPP LTE and LTE-A system enhancements to address the issue and support reliable V2X operation in the high mobility environments. Several solutions to improve the V2X system performance in the high mobility vehicular channel propagation conditions are described. Some aspects relate to the suggestion of a new DMRS patterns within individual subframes that promote more accurate CFO estimation. Moreover, another aspect provides DMRS mapping or puncturing patterns to transmit individual DMRS in a periodic pattern on respective OFDM/SC-FDMA symbols so that they do not occupy all REs of the OFDM/SC-FDMA symbols, respectively.

    Synchronization for sidelink based on prioritization of synchronization signals

    公开(公告)号:US11533695B2

    公开(公告)日:2022-12-20

    申请号:US17259126

    申请日:2019-08-08

    Applicant: Apple Inc.

    Abstract: Embodiments of a User Equipment (UE) and methods of communication are generally described herein. The UE may attempt to detect synchronization signals, including Long Term Evolution (LTE) synchronization signals from eNBs, New Radio (NR) synchronization signals from gNBs, and sidelink synchronization signals (SLSSs) from other UEs. The UE may prioritize an LTE synchronization signal over an SLSS, and may prioritize an NR synchronization signal over an SLSS. If the UE does not detect an LTE synchronization signal or an NR synchronization signal, the UE may select an SLSS. The UE may prioritize an SLSS from a UE that is directly synchronized to an eNB or a gNB over an SLSS from another UE that is indirectly synchronized to an eNB or a gNB.

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