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无线Ad hoc网络中,网络容量主要依赖于网络的空间复用度以及由于节点并发所造成的累积干扰。文章首先分析了网络的空间复用与干扰对于网络容量的影响,将网络容量映射为网络的空间复用以及网络中存在的干扰的相互作用的函数。并进一步基于安全载波监听的概念,提出了一种空间复用提升以及干扰避免的节点数据发送策略。该策略能够根据网络当中存在的干扰动态地调整节点的发送方式,在提高网络空间复用的同时控制网络当中存在的干扰,从而达到网络性能优化的目的。理论分析以及仿真实验都证实了我们的策略能够有效的提高无线Ad Hoc网络的吞吐量,优化网络性能。
In wireless Ad hoc networks, network capacity mainly depends on the spatial reusability of the network and the cumulative interference caused by node concurrency. Firstly, the paper analyzes the influence of space reuse and interference on network capacity, and maps network capacity as a function of the spatial reuse of network and the interaction of interference existing in the network. And based on the concept of secure carrier sense, this paper proposes a strategy of node data transmission by space reuse and interference avoidance. This strategy can dynamically adjust the sending mode of nodes according to the interference existing in the network and control the interference existing in the network while improving the reuse of the network space so as to achieve the purpose of network performance optimization. Theoretical analysis and simulation experiments confirm that our strategy can effectively improve the throughput of wireless Ad Hoc networks and optimize network performance.