ENHANCED PHYSICAL SIGNAL STRUCTURE FOR LTE V2V COMMUNICATIONS

    公开(公告)号:US20180227155A1

    公开(公告)日:2018-08-09

    申请号:US15751262

    申请日:2015-12-26

    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 Fourier transform (FFT) size for the V2V physical channel may each be reduced by the same factor. Doing so may enable the V2V physical channel to be implemented without significant modifications to other aspects of the LTE standard.

    Device to-device (D2D) transmit behavior

    公开(公告)号:US09706591B2

    公开(公告)日:2017-07-11

    申请号:US14701423

    申请日:2015-04-30

    CPC classification number: H04W76/14 H04W8/005 H04W72/121 H04W76/34

    Abstract: In embodiments, apparatuses, methods, and storage media may be described for mapping media access control (MAC) protocol data units (PDUs) that are used to transmit scheduling assignment (SA) discovery, and/or device-to-device (D2D) data. Embodiments herein may describe how one or more MAC PDUs may be mapped into a time resource pattern for transmissions (T-RPT). Embodiments herein may further describe examples of how and when a UE may skip subframes in transmissions of the SA and/or data. Additionally, embodiments herein may further describe examples of how a UE may behave if the UE cannot transmit one or more scheduled instances of SA or data. Additionally, embodiments herein may describe resolution of collisions of D2D discovery messages in the time domain. Other embodiments may be described and/or claimed.

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