Application-Level Frequency Control of Periodic Safety Messages in the IEEE WAVE
Application-Level Frequency Control of Periodic Safety Messages in the IEEE WAVE
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DOI：
10.1109/tvt.2012.2190119
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发表时间：
2012-03
影响因子：
6.8
通讯作者：
Yongtae Park;Hyogon Kim
中科院分区：
文献类型：
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作者：
Yongtae Park;Hyogon Kim
基本安全信息（BSM，也称为“信标”）是在IEEE车载环境无线接入中实现近距离感知的最基本构建模块。为了保证网络的安全性和敏捷性，BSM的传输频率应保持在允许的最高水平，但同时，需要遏制BSM的泛滥，为更高优先级的消息和其他应用留出空间，以共享5.9 ghz专用短程通信频段的小带宽。在本文中，我们描述了一种称为随机时间频率调整（FARE）的应用级消息传递频率估计方案，该方案显著提高了BSM吞吐量，同时使用的带宽比纯802.11p传输少。FARE可以完全在应用层上实现，既不使用跨层优化，也不使用来自相邻车辆的显式反馈。它只是几行代码；因此，它可以很容易地嵌入到在机载单元执行的BSM应用程序中。
The basic safety message (BSM, also called a “beacon”) is the most fundamental building block that enables proximity awareness in the IEEE Wireless Access in Vehicular Environments. For driving safety and agile networking, the frequency of the BSM transmissions should be maintained at the maximum allowable level, but at the same time, rampant BSM proliferation needs to be curbed to leave room for higher priority messages and other applications that share what small bandwidth we have in the 5.9-GHz Dedicated Short-Range Communications band. In this paper, we describe an application-level messaging frequency estimation scheme called frequency adjustment with random epochs (FARE), which significantly improves the BSM throughput while using less bandwidth than the bare 802.11p delivery. FARE can be implemented purely on the application layer and uses neither cross-layer optimization nor explicit feedback from neighboring vehicles. It is only a few lines of code; therefore, it can easily be embedded in the BSM application program executed in the onboard unit.