车载网络中一种改进的信道时隙分布调整策略
首发时间:2012-01-13
摘要:在车载网络通信中,由于原始的IEEE 802.11p/1609系列协议无法适应地区性差异导致的信源分布特性变化,使得信道资源的分布出现不合理的情况,进而大大降低了信道利用率。多数研究针对IEEE 1609.4中控制信道和服务信道切换机制,提出了诸如使用开发节点、包细化分割等方式解决其存在的资源浪费问题。本文在1609.4协议的基础上,提出了一种基于Actor-Critic学习的信道时隙分布调整策略,该策略可以自适应的调整安全信道和服务信道时隙的分布时长,使得信道资源的分布更加合理,并于后通过NCTUns仿真加以验证。
关键词: 车载无线网络 IEEE802.11p/1609 信道协调 Actor-Critic学习
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An improved channel time slot distribution strategy in WAVE
Abstract:In the WAVE (Wireless Access in the Vehicular Environment) network, the original IEEE 802.11p/1609 protocols can't adapt to regional differences, thus greatly reducing the channel utilization. Most studies focus on the resources waste problem ,brought by the control channel and service channel switching mechanism, such as choosing the exploitable node, smaller cutting of the package. This paper proposed a improved channel time slot distribution strategy based on Actor-Critic learning, which can adaptively adjust the time slot distribution to suit the network this moment. Simulations in NCTUns indicate that this strategy can effectively reduce the system's overrall packet loss rate, and improve network performance.
Keywords: WAVE IEEE 802.11p/1609 Channel Coordination Actor-Critic learning
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