Recently, both the industry and academy societies are trying to develop the next generation of cellular network (5G) to support vehicle-to-everything (V2X) communication. V2X communication can be used for information exchange among traffic participants and enable a cooperative driving to avoid accidents and also improve traffic efficiency. However, there are certain technical challenges faced by cellular networks to meet the requirements of V2X communication. For instance, the fast movement of vehicles in highway scenarios requires a large V2X communication range which can not be guaranteed by a single-hop direct V2X communication. In this work, we propose a two-hop direct V2X communication scheme to improve packet transmission range and therefore enhance service reliability. In this scheme, a V2X packet will be broadcasted by its generator directly to all nearby users (UEs) over sidelink. Among these receivers that locate in the proximity of the transmitter, some receivers will be selected and act as relays to retransmit its received packet. In this way, receivers which locate inside the targeted communication range but far away from the transmitter have a possibility to receive the packet from two different transmission hops and therefore the packet reception ratio can be increased. In order to select the proper receivers as relays, it is proposed for the network to collect and exploit certain context information. In addition, an optimization problem is constructed to optimally adapt the resource allocation among different hops according to the real-time system conditions. Last but not least, a system-level simulation is implemented to evaluate the proposed two-hop direct V2X communication with different resource allocation options.
Network-Assisted Two-Hop Vehicle-to-Everything Communication on Highway
2018-06-01
230714 byte
Conference paper
Electronic Resource
English
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