An Urban Area-Oriented Traffic Information Query Strategy in VANETs
An Urban Area-Oriented Traffic Information Query Strategy in VANETs
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DOI：
10.1007/978-3-642-39701-1_26
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发表时间：
2013-08
期刊：
影响因子：
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通讯作者：
Xinjing Wang;Longjiang Guo;Chunyu Ai;Jinbao Li;Zhipeng Cai
中科院分区：
文献类型：
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作者：
Xinjing Wang;Longjiang Guo;Chunyu Ai;Jinbao Li;Zhipeng Cai
车辆自组网中的交通信息查询具有多种重要的应用。实时交通信息可以为用户根据当前交通状况选择最优路径提供支持。本文提出了一种面向城市区域的交通信息查询处理机制，该机制能够快速、准确地获取从源到目的地的多条路径的实时交通信息，帮助用户确定最优路径。提出的机制包括两个关键算法-查询分发和处理，并将结果路由回查询请求者。查询处理算法确定每次查询的范围，以便车辆可以在一定的高效范围内查询和收集数据，避免返回不堪重负的大量结果。对于查询车辆，返回结果给移动查询请求者是一个动态路由问题。我们提出了一种位置预测方法，根据查询数据包中存储的信息来估计请求者的当前位置。仿真结果表明，该策略能够提高数据传输效率，查询结果能够有效地指导路由选择。
Traffic information query in Vehicular Ad Hoc Network has various significant applications. Real-time traffic information can provide support for users to choose an optimal route according to current traffic situation. In this paper, we propose an urban area-oriented traffic information query processing mechanism, which can acquire the realtime traffic information of multiple paths from source to destination in relatively fast and accurate manner, and help users to determine an optimal route. The proposed mechanism includes two key algorithms - query dissemination and processing, and routing results backward to query requester. The query processing algorithm determines the scope of each query, so that a vehicle can query and collect data within a certain efficient scope to avoid returning overwhelmed large amount results. For queried vehicles, returning results to the moving query requester is a dynamic routing problem. We proposed a position predicting method to estimate the current location of the requester according to the information stored in the query packet. Simulation results show that the proposed strategy can improve the efficiency of data transmission, and the returned query results is effective for choosing an optimal route.