Improvement of routing protocols in urban vehicular mobile Ad hoc networks based on an analytical model
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摘要: 在Manhattan移動模型的基礎上,深入分析了車載移動Ad hoc網絡路由協議的性能問題.結合AODV路由協議,提出了一種可以量化分析車載Ad hoc網絡路由斷鏈率和路由負載的模型.模型分析指出,傳統的移動Ad hoc網絡路由協議應用于車載Ad hoc網絡時性能會嚴重下降.針對這一問題,提出了一種基于車輛運動方向信息的類AODV路由協議DBAP,將車輛的運動方向信息作為其路由發現過程中的輔助參數,從而顯著地增強了路由穩定性.仿真結果驗證了模型的正確性,同時證明了本文所提出的DBAP路由協議在城市車載環境中具有較低的路由負載和路由斷鏈率,在協議性能等方面相對于AODV協議具有顯著提高.Abstract: The performance of routing protocols was studied in vehicular Ad hoc networks (VANETs) based on the Manhattan mobility model. Integrated with the AODV routing protocol, an analytical model was proposed, which was able to quantificationally measure the route breaking rate and routing overhead of VANETs. It is indicated by the analytical model that classic routing protocols in mobile Ad hoc networks can cause serious declination in the performance of VANETs; therefore, a direction based AODV routing protocol (DBAP) was proposed. The vehicle's moving direction was used in DBAP as its auxiliary parameter in routing discovery process, which remarkably improved the routing stability. Simulations show the validity of this model and prove DBAP's lower route breaking rate and routing overhead as well as its significantly improved performance in VENETs in comparison with AODV in urban vehicular environment.
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Key words:
- vehicular communication /
- Ad hoc network /
- mobility model /
- routing protocol /
- routing overhead
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