| 摘要: |
| 提出一种基于网络编码的车联网数据分发算法.算法没有简单采用传统机会转发方式，而是在转发之前依据车辆的地理位置进行优先级排序，然后将数据包进行网络编码，让每个编码包携带下一跳车辆信息并通过车辆应答实现对下一跳转发车辆的选择，确保了由转发开销最低的下一跳车辆完成数据的转发.同时，给出转发车辆收到的数据包与转发次数的比值，从而确定转发计数器.仿真结果显示，提出的方案能减少不必要的传输行为，有效改善网络性能. |
| 关键词: 车联网 机会路由 转发 网络编码 |
| DOI： |
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| Data dissemination based on network coding in VANETs |
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| Abstract: |
| A new protocol was introduced for data transmission based on network coding in Vehicular ad hoc networks(VANGTs).The protocol prioritized candidate vehicles by its location.After applying network coding to packets,each coded packets carry information of next hop vehicle and complete selection of next hop forwarder.In this way,the vehicle with least forwarding cost was chosen as next forwarder. Meanwhile,the ratio between received and transmitted packets was presented,it was used to transmitting counter,and inhibit the occurrence of duplicate packet.Simulation results show that the protocol achieves higher performance that existing vehicular opportunistic forward protocols. |
| Key words: vehicular ad hoc networks opportunistic routing forward network coding |
