车载自组网中基于分布式TDMA的协作数据重发方法

发布时间：2018-05-07 23:30

本文选题：移动自组网 + 车载自组网　；参考：《东南大学学报(自然科学版)》2017年04期

【摘要】：为进一步利用车载自组网中分布式TDMA的节点空闲时隙资源,提出了一种分布式协作数据重发方法,即协作分布式TDMA(cooperative distributed TDMA,Co-DTDMA)方法.利用无线信道的广播特性与分布式TDMA的信道访问确定方式,Co-DTDMA中的信息交互过程能够以一种有序和确定的方式进行,在节点未成功发送数据时,附近的邻居节点利用自身空闲时隙进行协作数据重发,从而在不影响正常数据传输业务情形下,传输失败的数据拥有更多的发送机会.上述协作重发不依赖于中心节点,以分布式方式执行,因而适应车载自组网的应用场合.理论分析与仿真结果表明,Co-DTDMA显著提高了数据包发送成功概率,降低了数据包传输时延和丢包率,显著提高了网络可靠性.
[Abstract]:In order to further utilize the idle time slot resources of distributed TDMA nodes in vehicle-borne ad hoc networks, a distributed cooperative data retransmission method, namely cooperative distributed TDMA(cooperative distributed TDMA-Co-DTDMA, is proposed. Using the broadcast characteristics of wireless channel and the channel access determination mode of distributed TDMA, the process of information interaction in Co-DTDMA can be carried out in an orderly and deterministic manner, when the node fails to send data successfully. Neighbor nodes use their own idle time slots to retransmit cooperative data, so that the data transmission failure has more transmission opportunities without affecting the normal data transmission traffic. The above cooperative retransmission is independent of the central node and executed in a distributed manner, so it is suitable for the applications of vehicle-mounted ad hoc networks. Theoretical analysis and simulation results show that Co-DTDMA can significantly improve the probability of packet transmission, reduce the packet transmission delay and packet loss rate, and improve the reliability of the network.
【作者单位】：合肥工业大学计算机与信息学院;安徽大学计算机教学部;
【基金】：国家自然科学基金资助项目(61370088,61502142) 安徽省自然科学基金资助项目(1408085MKL80)
【分类号】：TN929.5

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