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Reliable broadcasting in VANETs using Physical-Layer Network Coding

机译:使用物理层网络编码的VANET中的可靠广播

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摘要

In this paper, we present a PNC-based MAC protocol for VANETs (VPNC-MAC) which makes use of the PNC to ensure efficiency and reliability of periodic beacon transmissions in VANETs. The VPNC-MAC protocol basically consists on two phases: a setup phase and the heartbeat packet exchange phase. During the setup stage, VPNC-MAC uses a location-based OFDMA signaling technique to guarantee a quick and non bandwidth consuming setup. In addition, the packet exchange phase in VPNC-MAC contains two periods of variable and adjustable length. The fist period is a guaranteed time slot period, called the VPNC-MAC session, in which the nodes exchange their packets using PNC. The second period is a contention period reserved to nodes unable to transmit during the VPNC-MAC session. The simulation results shows that the VPNC-MAC protocol outperforms the optimal CSMA (ideal TDMA) in terms of capacity of transmissions supported within a fixed duration, and overall packet reception rate.
机译:在本文中,我们提出了一种基于PNC的VANET MAC协议(VPNC-MAC),该协议利用PNC来确保VANET中周期性信标传输的效率和可靠性。 VPNC-MAC协议基本上包括两个阶段:建立阶段和心跳包交换阶段。在设置阶段,VPNC-MAC使用基于位置的OFDMA信令技术来确保快速且不占用带宽的设置。另外,VPNC-MAC中的数据包交换阶段包含两个可变长度和可调长度的周期。第一时段是保证的时隙时段,称为VPNC-MAC会话,在该时段中,节点使用PNC交换其数据包。第二时段是保留给VPNC-MAC会话期间无法发送的节点的竞争时段。仿真结果表明,VPNC-MAC协议在固定持续时间内支持的传输容量和总体数据包接收率方面优于最佳CSMA(理想TDMA)。

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