摘要: 在单载波无线Mesh网络(WMN)中,网络拥塞是影响系统性能的一个重要因素。为此,提出一种跨层拥塞反馈算法,通过拥塞反馈将不同协议层作为一个整体架构进行优化设计。各层利用本地信息进行分布式计算完成个体优化,即在传输层、网络层、链路层、物理层分别优化拥塞控制、路由策略、MAC调度、AMC模式,以达到整体性能优化的目的。仿真结果表明,该算法能降低拥塞率,且其吞吐量相比传统IEEE802.11 TCP提升约18%。
关键词:
拥塞反馈,
跨层设计,
无线Mesh网络,
跨层拥塞反馈算法,
单载波,
个体优化
Abstract: In single carrier Wireless Mesh Network(WMN), congestion feedback is a key factor to system performance. This paper presents a Cross Layer Congestion Feedback(CLCF) algorithm. Congestion feedback is used to integrate various protocol layers into a unified framework to be optimized. Different layers carry out distributed computation using local information to achieve individual optimality, that is, to improve the performance of the whole system, congestion control, routing strategy, Media Access Control(MAC) scheduling and Adaptive Modulation Coding(AMC) mode are respectively optimized in transport layer, network layer, link layer and physical layer. Simulation results indicate that the throughput of the proposed algorithm is increased by 18% compared with IEEE802.11 TCP.
Key words:
congestion feedback,
cross-layer design,
Wireless Mesh Network(WMN),
Cross Layer Congestion Feedback(CLCF) algorithm,
single carrier,
respectively optimization
中图分类号:
殷爱菡, 韩文献, 陈燕燕. 单载波WMN中跨层拥塞反馈算法研究[J]. 计算机工程, 2012, 38(10): 80-82.
YAN Ai-Han, HAN Wen-Xian, CHEN Yan-Yan. Research on Cross Layer Congestion Feedback Algorithm in Single Carrier WMN[J]. Computer Engineering, 2012, 38(10): 80-82.