基于动态空间预留的多信道MAC协议
首发时间:2018-01-09
摘要:针对移动自组织网络在不同场景中运用存在的低信道利用率和高碰撞传输等问题,提出了一种基于动态空间预留的介质访问控制(MAC, Medium Access Control)协议。在该协议中,分布在网络覆盖区域的组头根据源节点的传输请求,周期性地调控数据传输时隙上数据的发送或接收,从而有效的提高信道利用率;此外,本文通过参考更多的网络参数确定空间预留半径,以确保在降低分组传输碰撞的同时也能防止暴露终端问题恶化;最后,本文还从数学的角度验证分组碰撞的变化对网络吞吐量的影响。仿真结果表明,与现有的MAC协议相比,本文提出的协议有效地实现了更高的吞吐量和更低的分组碰撞概率。
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A Multi-channel MAC protocol Based on Dynamic space reservation
Abstract:Considering the application of mobile Ad Hoc networks in different scenarios have some problems, such as inefficient channel utilization and severe transmission collision. We propose a novel medium access control based on dynamic space reservation. In this protocol, a set of cluster heads were distributed in the network area, periodically regulated the data transmission on the data transmission slots based on the transmission request from source nodes to improve the utilization of channel. In addition, the spatial reserve radius was determined by referring to more network parameters, it ensured that the degradation of the exposed terminal problem can be prevented while reducing the packet transmission collision. Finally, we also validated the impact of packet collision on network throughput from the viewpoint of mathematical. The simulation results show that our propose protocol provides higher throughput and lower packet collision probability in comparison with existing MAC protocol.
Keywords: Medium Access Control(MAC) space reservation channel utilization collision
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