基于网络空间复用与累积干扰的无线Ad Hoc网络性能优化  

Wireless Ad Hoc Network Performance Optimization Based on Network Spatial Reuse and Cumulative Interference

作　　者：戴志龙[1] 章越[1] 

机构地区：[1]中国科学技术大学计算机科学与技术学院

出　　处：《电子技术（上海）》2013年第8期88-90,87,共4页Electronic Technology

摘　　要：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 relies on the degree of network spatial reuse and the cumulative interference caused by simultaneous transmissions among wireless nodes. In this paper, we first analyze the impact of network spatial reuse and cumulative interference on network capacity. And then, we map the network capacity as the function of and the interaction between network spatial reuse and interference. Furthermore, based on the concept of the safe-carrier sensing range, we propose a transmission scheme to improve network spatial reuse and avoid interference. The proposed scheme can adjusts node＇s transmission mode dynamically, so as to control the interference existing in the network while improving the spatial reuse in the network, leading to the optimization of network performance. Theoretical analysis and simulations prove that the proposed scheme can improve the throu^hput and performance of the Ad Hoc network effectively.

关 键 词：无线AD HOC网络 干扰 空间复用 网络容量 

分 类 号：TN929.5[电子电信—通信与信息系统]