V2X PERFORMANCE ENHANCEMENTS IN HIGH SPEED ENVIRONMENTS

    公开(公告)号:US20180241508A1

    公开(公告)日:2018-08-23

    申请号:US15754260

    申请日:2015-12-23

    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.

    GOOD CELL QUALITY CRITERIA
    3.
    发明公开

    公开(公告)号:US20240323711A1

    公开(公告)日:2024-09-26

    申请号:US18574828

    申请日:2022-10-21

    CPC classification number: H04W24/02 H04W24/08

    Abstract: This disclosure describes systems, methods, and devices related to good cell criteria. A device may establish a relaxation criteria for radio link monitoring (RLM) and beam failure detection (BFD). The device may utilize the relaxation criteria to assist a user equipment (UE) to enter or exit a relaxed condition. The device may apply a relaxation threshold to both RLM and BFD, wherein the relaxation threshold is based on a signal to noise ratio (SNR) of at least one reference signal (RS).

    VEHICLE TO EVERYTHING SYNCHRONIZATION REFERENCE SELECTION AND RESELECTION

    公开(公告)号:US20190045470A1

    公开(公告)日:2019-02-07

    申请号:US16148785

    申请日:2018-10-01

    CPC classification number: H04W56/0015 H04W4/40

    Abstract: Apparatuses, systems and methods associated with asynchronous synchronization reference source selection and reselection for wireless communication devices are disclosed herein. In embodiments, one or more non-transitory, computer-readable media having instructions stored thereon, wherein the instructions, in response to execution by a user equipment (UE), cause the UE to establish a sidelink connection with a first synchronization reference (SyncRef) UE, and monitor for physical sidelink broadcast channel (PSBCH) synchronization signals from a second SyncRef UE, wherein the UE is to drop one or more subframes of data reception of the sidelink connection with the first SyncRef UE when the UE monitors for the PSBCH synchronization signals. Other embodiments may be described and/or claimed.

    CONGESTION CONTROL FOR VEHICULAR-TO-ANYTHING SERVICES

    公开(公告)号:US20180242190A1

    公开(公告)日:2018-08-23

    申请号:US15754531

    申请日:2016-04-01

    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.

    DEMODULATION IN WIRELESS COMMUNICATIONS
    7.
    发明申请

    公开(公告)号:US20180212733A1

    公开(公告)日:2018-07-26

    申请号:US15744009

    申请日:2015-12-24

    Abstract: A wireless communication device is configured to perform demodulation of device-to-device (D2D) communication signals or LTE uplink signals in a User Equipment. In a transmitter, demodulation reference signal (DMRS) generation circuitry is provided for selective insertion of DMRS signals in resource elements of resource blocks of the signal for transmission using a pattern of resource elements spanning at least one of the resource blocks such that a minimum temporal spacing between consecutive symbols of the demodulation reference signal pattern is less than one slot. In a receiver the DMRS signals are used to perform channel estimation. A user equipment having the DMRS generation circuitry is provided. A computer program product is also provided. Other embodiments may be described and claimed.

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