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中文摘要：
针对车辆与车辆通信（V2VC）系统中由于车辆高移动性、动态网络拓扑和有限网络资源导致网络拥塞的问题,提出了一种上下文感知分布式信标调度方案。它基于空间上下文信息以类TDMA传输方式动态调度信标,在可预见的延迟和高可靠性下传输信标,基于信道负荷的局部测量和包括在信标中的上下文信息知识,每个节点以分布式方式在分配的时隙动态调度信标传输。仿真实验使用真实信道模型和IEEE 802.11p PHY/MAC模型内各种通信场景评估提出的信标调度方案,结果表明,方案的性能在数据包传输率和信道访问延迟方面优于周期性调度,并且可以满足安全应用的需求。
英文摘要：
For vehicle to vehicle communication （V2VC） system, due to the high mobility, dynamic network topology and limited network resources, resulting in a communication network congestion problem, this thesis proposed a novel distributed beacon scheduling scheme. It called context-aware beacon scheduling（ CABS）, which was based on spatial context information similar to TDMA transmission with dynamic scheduling beacon, and transmitted beacon under highly reliable and predictable delays. Based on partial measurement of channel load and context information included in the beacon, each node dynamically scheduled beacon transmission in a distributed manner in the allocated time slot. In the simulation, it used various communication scenarios in the real channel model and IEEE 802. llp PHY/MAC model to evaluate the proposed beacon scheduling scheme. The simulation results show that the performance of CABS in packet transmission rate and channel access delay is better than periodic scheduling. Moreover, CABS scheme meets the needs of security applications.
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