车载自组织网络中预警信息发布的持久地理广播

Qiangyuan Yu, G. Heijenk
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引用次数: 87

摘要

车载自组织网络(VANETs)作为智能交通系统(ITS)的一种新的网络环境正在兴起。在为vanet设想的许多应用中,交通信息需要传播给一组相关车辆,并保持一段时间。本文提出了一种用于车辆预警信息传播的持续地球广播系统。在这个系统中,一段道路上的车辆向相反方向的车辆传递安全信息,以警告他们前方有危险情况。目标是尽可能在所有相关车辆到达警戒线之前收到警告,同时尽可能少地广播消息。相反的车辆是首选的中继,以减少广播开销和帮助消息传递上游。此外,动态设置各个中继车对下一次广播的等待时间,在保持警报信息在受影响区域的同时,可以节省不必要的广播。通过测量各种条件下的广播开销,仿真结果表明了所提系统的质量。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Abiding Geocast for Warning Message Dissemination in Vehicular Ad Hoc Networks
Vehicular ad hoc networks (VANETs) are emerging as a new network environment for intelligent transportation systems (ITS). In many applications envisaged for VANETs, traffic information needs to be disseminated to a group of relevant vehicles and maintained for a duration of time. Here a system of abiding geocast is presented for disseminating warning message among mobile vehicles in VANETs. In this system vehicles on a stretch of roads carry safety messages to vehicles in the opposite direction, so as to warn them regarding a dangerous situation ahead. The objective is that as much as possible all relevant vehicles receive the warning before they reach the warning line, whereas as few messages are broadcasted as possible. Opposite vehicles are preferred as relays to reduce broadcast overhead and help message delivery upstream. Furthermore, wait time of individual relay vehicles are set dynamically for the next broadcast, thus unnecessary broadcasts can be saved while keeping the warning message in the affected area. Simulations show the quality of the proposed system by measuring the broadcast overhead under various conditions.
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