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首页> 外文会议>International conference on mobile, secure, and programmable networking >Requirements and Complexity Analysis of Cross-Layer Design Optimization for Adaptive Inter-vehicle DSRC
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Requirements and Complexity Analysis of Cross-Layer Design Optimization for Adaptive Inter-vehicle DSRC

机译：自适应车用DSRC跨层设计优化的要求和复杂性分析

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Accurate implementation of communications protocol stacks is unavoidable, however the traditional protocol stack designed for Dedicated Short Range Communications (DSRC) does not efficiently support safety applications. DSRC protocol stack must satisfy some stringent performance requirements by safety applications in challenging scenarios such as heavy road traffic. Several communications solutions, and industry standards including the recently published SAE-J2945.1 standard, are proposed for vehicular safety systems, but by what means such systems can address the stringent requirements of safety applications and the scalability issue in their actual deployment is still an open question. With the current spectrum allocations for vehicular DSRC and the data traffic generated by cooperative applications, the radio channels could be easily saturated in the absence of effective control algorithms, resulting in unstable inter-vehicle communications and eventually failure of the system. The results of several simulation studies are presented in this paper to evaluate the DSRC channel and understand the parameters affecting its state. This paper proposes a cross-layer designed controller for inter-vehicle safety messaging to address the channel congestion problem of vehicular networks. The proposed controller enjoys a design supporting direct and in-direct interfacing between layers with awareness control aiming at serving the stringent requirements of DSRC safety applications. The message dissemination controller receives feedback such as channel utilization, outdated packets and vehicle density information from cross-layer sources to control the load on the radio channels by adjusting the transmit power and message intervals. The necessity of instant adjustments requires the mechanism to be utilized with a decentralized yet cooperative coordination. The aim of this study is to validate the cross-layer design for DSRC and is fundamentally different to that of the message scheduling and congestion control algorithm presented as a part of the SAE-J2945.1 standard. The complexity verification and results of analysis show the proposed controller is an efficient and fair design.
机译：通信协议栈的准确实现是不可避免的，但是为专用短程通信（DSRC）设计的传统协议栈不能有效地支持安全应用。 DSRC协议栈必须在严峻的情况下（例如交通繁忙）满足安全应用程序的一些严格的性能要求。提出了几种针对车辆安全系统的通信解决方案以及包括最近发布的SAE-J2945.1标准在内的行业标准，但是这些系统通过何种方式可以满足安全应用的严格要求，并且在实际部署中仍然存在可扩展性问题。悬而未决的问题。利用当前用于车辆DSRC的频谱分配以及由协作应用程序生成的数据业务，在缺少有效控制算法的情况下，无线电信道很容易饱和，从而导致车辆之间的通信不稳定，并最终导致系统故障。本文介绍了一些仿真研究的结果，以评估DSRC通道并了解影响其状态的参数。本文提出了一种跨层设计的用于车辆间安全消息传递的控制器，以解决车辆网络的信道拥塞问题。拟议的控制器采用了一种设计，该模型支持意识控制的层间直接和间接接口，旨在满足DSRC安全应用的严格要求。消息分发控制器从跨层源接收诸如信道利用率，过期数据包和车辆密度信息之类的反馈，以通过调整发射功率和消息间隔来控制无线电信道上的负载。即时调整的必要性要求该机制必须与分散但合作的协调机构一起使用。这项研究的目的是验证DSRC的跨层设计，并且与作为SAE-J2945.1标准的一部分提出的消息调度和拥塞控制算法有根本的不同。复杂度验证和分析结果表明，所提出的控制器是一种高效，合理的设计。

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