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基于网络利用率最大化来提高无线Mesh网络中TCP协议的传输性能(英文)

Performance Enhancement and Utility Maximization for TCP in Wireless Mesh Networks

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【Author】 Liu Hongquan1,2,Chen Jiong1,Song Siming3,Gu Yuantao1 1Department of Electronic Engineering,Tsinghua University,Beijing 100084,P.R.China 2Research Institute of Air Force Armament,Beijing 100076,P.R.China 3Department of Electronic Engineering,University of California,Los Angeles,Los Angeles 1002388,USA

【机构】 Department of Electronic Engineering,Tsinghua University； Research Institute of Air Force Armament； Department of Electronic Engineering,University of California；

【摘要】 In Wireless Mesh Networks (WMNs),the performance of conventional TCP significantly deteriorates due to the unreliable wireless channel.To enhance TCP performance in WMNs,TCP/LT is proposed in this paper.It introduces fountain codes into packet reorganization in the protocol stack of mesh gateways and mesh clients.Furthermore,it is compatible with conventional TCP.Regarded as a Performance Enhancement Proxies (PEP),a mesh gateway buffers TCP packets into several blocks.It simultaneously processes them by using fountain encoders and then sends them to mesh clients.Apart from the improvement of the throughput of a unitary TCP flow,the entire network utility maximization can also be ensured by adjusting the scale of coding blocks for each TCP flow adaptively.Simulations show that TCP/LT presents high throughput gains over single TCP in lossy links of WMNs while preserving the fairness for multiple TCPs.As losses increase,the transmission delay of TCP/LT experiences a slow linear growth in contrast to the exponential growth of TCP.更多还原

【Abstract】 In Wireless Mesh Networks (WMNs),the performance of conventional TCP significantly deteriorates due to the unreliable wireless channel.To enhance TCP performance in WMNs,TCP/LT is proposed in this paper.It introduces fountain codes into packet reorganization in the protocol stack of mesh gateways and mesh clients.Furthermore,it is compatible with conventional TCP.Regarded as a Performance Enhancement Proxies (PEP),a mesh gateway buffers TCP packets into several blocks.It simultaneously processes them by using fountain encoders and then sends them to mesh clients.Apart from the improvement of the throughput of a unitary TCP flow,the entire network utility maximization can also be ensured by adjusting the scale of coding blocks for each TCP flow adaptively.Simulations show that TCP/LT presents high throughput gains over single TCP in lossy links of WMNs while preserving the fairness for multiple TCPs.As losses increase,the transmission delay of TCP/LT experiences a slow linear growth in contrast to the exponential growth of TCP.更多还原

【关键词】 TCP； TCP/LT； fountain codes； wireless mesh networks； network utility maximization；
【Key words】 TCP； TCP/LT； fountain codes； wireless mesh networks； network utility maximization；

【基金】 supported by the State Key Program of National Nature Science Foundation of China under Grants No.U0835003,No.60872087

【文献出处】中国通信 ,China Communications , 编辑部邮箱 ,2012年04期

【分类号】TN915.04
【被引频次】1
【下载频次】54

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