Abstract: The data shared on one direction road usually are not same with that shared on opposite direction roadway, in order to mitigate the influence of packet loss and utilize the store-and-forward capability of mobile vehicles, this paper applies network coding and the simple store-and-forward mechanism using directional antennas to accelerate disseminating for this two-way road scenario. Vehicles store packets when passing the disseminator of opposite roadway, then when taking disseminator role they forward packets that vehicles on opposite roadway are interested in and transmit packets vehicles on same roadway are interested in at same time. Simulation shows that, for different data disseminating, the gain is comparable with that same data are disseminated without forwarding, and for same data disseminating, the gain can exceed twice as much as that without forwarding.

Key words: data disseminating, network coding, store-and-forward, vehicle-to-vehicle networks

摘要： 在双向车道网络中，不同车道上分发的数据内容通常是不相同的，为了减轻丢包率的影响并利用移动车辆的存储转发能力，提出了一种可以结合定向天线的网络编码与存储转发机制来提高数据内容的分发速率。在该机制下，车辆节点驶经反向车道的分发节点时会存储接收到的来自不同车道的数据包，当其成为分发节点后，在分发同向车辆节点所需要的数据内容的同时也会转发反向车辆节点需要的数据包，以此来提高双向车道网络的传输速率。仿真结果显示，对于不同内容的分发，该机制下的分发速率增益接近相同内容分发但无转发机制的速率增益；而对于相同内容的分发，该机制下的分发速率增益可以超过无转发机制的两倍。

关键词: 内容分发, 网络编码, 存储转发, 车-车通信网络