摘要
无线信道干扰和负载分布的不均衡严重影响无线Mesh网络吞吐量、端到端延时和资源利用率。在已有基于信噪比和邻居节点个数的干扰模型基础上,进一步研究了无线Mesh网络的链路干扰。在综合考虑了无线Mesh网络流间干扰和和流内干扰的基础上,提出路由判据PIL(Path Interference Level)。在此基础上,提出一种新的基于干扰感知的负载均衡路由协议IA-DSR(Interference-Aware DSR)。IA-DSR考虑无线网络拥塞并选择受到干扰最小的路径。仿真结果表明,在不显著增加开销的情况下,IA-DSR可以有效地提高网络的整体吞吐量,降低网络端到端时延和丢包率。
The interference among communication links and the characteristics of load imbalance plays sig nificant roles in the throughput, latency and resource efficiency of wireless mesh networks. The link inter ference in wireless mesh network is investigated based on the interference model with respect to SNR and sum of neighbor. On the basis of existing research, a routing metric PIL （ Path Interference Level） is pro posed, considering inter-flow interference and intra-flow interference. This paper puts forward an IA- DSR （Interference-Aware DSR） routing protocol which chooses the path of least interference. The NS2 simulation results show that, without obvious increase of overhead, IA-DSR can effectively improve the o verall throughput of the network, and reduce end-to-end delay.
出处
《通信技术》
2014年第4期401-405,共5页
Communications Technology
基金
国家自然科学基金(No.61170231)
中国科学技术大学创新团队(No.WK2100100021)~~
关键词
干扰感知
路由
负载均衡
无线MESH网络
wireless mesh networks
interferences aware
load balancing
routing protocol
