双向广播模式的车辆自组织网络数据传输算法

Vehicle self-organizing network data transmission algorithm based on two-way broadcast mode

针对车辆自组织网络双向广播的通信中断概率大及数据传输效率低的问题,提出一种双向广播模式切换的车辆自组织网络数据传输算法。该算法根据车辆双向广播特点建立了相遇广播模型和相离广播模型,首先对相遇广播阶段进行分析,得到传播完成时隙以及成功接收数据包的概率密度函数。接着,根据数据缓存容量计算相离广播阶段的所需广播时隙数,并根据通信深度选择下一个广播发送节点。实验仿真结果表明,相比基于复杂网络理论的车辆信息共享算法以及基于中继网络的V2V链路分配算法,该算法平均中断性能分别提升了12.1%和6.8%,平均累积传播完成时隙分别减少了28.7%和36.5%。

Due to the bi-directional broadcast of vehicle self-organizing network had great communication outage probability and low data transmission efficiency, a vehicle self-organizing network data transmission algorithm based on two-way broadcast mode was proposed. The algorithm built the encounter broadcast model and separated broadcast model based on bi-directional broadcast vehicle characteristics. Firstly, it got the completed slot and successfully received data packet probability density function by analyz-ing encounter broadcast stage. Next, the algorithm calculated the required number of broadcast slots in separated broadcast phase based on the data buffer capacity, and according to communication depth selected the next broadcast node. Simulation results show that, compared with the vehicle information sharing algorithm based on complex network theory and V2 V link allocation algorithm based relay network, the average interruption performance was improved by 12. 1 % and 6. 8 %, and the average cumulative propa-gate slots were reduced by 28. 7 % and 36. 5 %.