摘要
车辆时延容忍网络在实际应用中存在较严重的数据丢失及延迟过高的问题,对此提出一种中断最小化I2RV候选中继DTN拥塞控制协议。提出一个中断最小化I2RV中继方案,减少信号未覆盖区域存在的相距较远邻近单元间的通信中断(RSUs)问题,在该方案中为目标车辆设置两个延迟,一个延迟设置在车辆离开信号覆盖区域时,另一个设置在车辆进入下一个通信中断时;建立中继车辆最小中继成本及中断时间选择方式,建立目标车辆速度优化协调机制。与现有的采用内点算法单中继选择方案进行实验对比分析,分析结果表明,中断最小化I2RV中继方案能够比单中继方案更好地减少数据丢失及延迟过高问题,可有效降低因通信中断导致的车辆拥挤问题。
Vehicle delay tolerant network has a serious communication interrupt problems, and a DTN congestion control protocol based on I2RV interrupt minimization was proposed. An interrupt minimization I2RV relaying scheme was proposed, reducing the interruption of RSUs in the signal-uncovered area. Within the protocol, two delay points were set in the subject vehicle. One was set when the vehicle left the signal coverage area and the other was set when vehicle encountered a communication interrupt. The minimization of the cost of the relay and the selection of the interrupt time were built and the optimization of the speed of the subject vehicle was realized. Comparison was made with the existing algorithms, the interrupt minimization I2RV relay protocol can reduce the communication time and the congestion caused by the eommunication system.
出处
《计算机工程与设计》
北大核心
2017年第4期903-908,915,共7页
Computer Engineering and Design
关键词
DTN网络
通信中断
目标车辆
中继车辆
中断最小化
DTN network
communication interruption
target vehielel relay vehicle
interrupt minimization
