Cross-Layer Routing Using Cooperative Transmission in Vehicular Ad-hoc Networks
Cross-Layer Routing Using Cooperative Transmission in Vehicular Ad-hoc Networks
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DOI：
10.1109/jsac.2011.110307
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发表时间：
2011-03
影响因子：
16.4
通讯作者：
Z. Ding;K. Leung
中科院分区：
文献类型：
--
作者：
Z. Ding;K. Leung
无线车载自组织网络的特点是多跳传输，其中一个关键问题是路由的设计，例如，如何通过可用的中间节点有效地将信息流从源引导到目的地。本文应用协作传输的思想研究了跨层路由问题，提出了一种新的路径选择策略，在传输功耗和端到端可靠性之间取得了较好的折衷。首先研究了协作传输对无线链路代价的影响，表明协作传输可以显著提高无线链路的质量。然后，我们专注于制定目标函数的解决跨层优化问题。具体而言，根据不同的服务质量要求，两种不同类型的路由优化进行了研究，以了解改进的链路成本的路由决策的影响。两个解决的优化问题的最优解的封闭形式的表达式开发，后来被用作路由决策的定量标准。我们开发的分析和仿真结果表明，使用合作传输的标准通常会产生更有效的路由比可比方案的端到端的可靠性和总传输功率。
Wireless vehicular ad hoc networks are characterized by multi-hop transmission, where a key problem is the design of routing, e.g., how to efficiently direct the information flow from the source to the destination via available intermediate nodes. In this paper, cross-layer routing is studied by applying cooperative transmission and a new strategy of path selection is proposed to achieve a better tradeoff between the transmission power consumption and end-to-end reliability. The influence of cooperative transmission to the wireless link cost is first studied, which shows that the quality of wireless links could be improved significantly. Then we focus on formulating the objective functions for the addressed cross-layer optimization problem. Specifically, according to different quality of service requirements, two different types of routing optimization are investigated to understand the effects of improved link cost to the routing decision. The closed-form expressions of the optimal solutions for two addressed optimization problems are developed and later used as quantitative criteria of the routing decision. Our developed analytical and simulation results show that the criteria using cooperative transmission typically yield more efficient routes than the comparable schemes in terms of end-to-end reliability and total transmission power.