On parameter tuning for FAST TCP
作者：
Tan, Liansheng
* （ ;Zhang, Wei;Yuan, Cao
期刊：
IEEE COMMUNICATIONS LETTERS ,2007年11(5):458-460 ISSN：1089-7798
通讯作者：
Tan, Liansheng
（ 作者机构：
[Tan, Liansheng] Australian Natl Univ, Res Sch Informat Sci & Engn, Canberra, ACT 0200, Australia.;Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Peoples R China.
通讯机构：
[Tan, Liansheng] A;Australian Natl Univ, Res Sch Informat Sci & Engn, Canberra, ACT 0200, Australia.
关键词：
Congestion control;FAST TCP;Parameter setting;Stability
摘要：
This paper studies the stability of FAST TCP using a continuous time model of a single-link single-source network. A sufficient condition on asymptotical stability of FAST TCP congestion window is obtained, which relates all the relevant parameters in FAST TCP and decouples the key parameter α from others. A guideline on FAST TCP parameter setting is thus provided. The ns2 simulations validate the theoretical results. © 2007 IEEE.
语种：
英文
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LAMOR: Lifetime-Aware Multipath Optimized Routing algorithm for video transmission over ad hoc networks
作者：
Tan, Liansheng
* （ ;Xie, Ling;Ko, King-Tim;Lei, Ming;Zukerman, Moshe
期刊：
IEEEVTS Vehicular Technology Conference. Proceedings ,2006年2:623-627 ISSN：1550-2252
通讯作者：
Tan, Liansheng
（ 作者机构：
[Tan, Liansheng; Xie, Ling] Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Peoples R China.;[Ko, King-Tim] City Univ Hong Kong, Dept Elect Engn, Kowloon, Hong Kong, Peoples R China.;[Lei, Ming] Wuhan Univ, Sch Elect Informat, Wuhan 430079, Peoples R China.;[Zukerman, Moshe] Univ Melbourne, CUBIN, Natl ICT Australia, Dept EEE, Melbourne, Vic 3010, Australia.
通讯机构：
[Tan, Liansheng] C;Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Peoples R China.
关键词：
Ad hoc networks;Lifetime;Multipath;Routing
摘要：
Multipath routing is a key technique to support video transmission over wireless ad hoc networks (WANETs). In WANETs, the lifetime of a node is related to its residual energy, current traffic conditions and the required energy consumed for sending a packet to its next hop in the path. In this paper, we propose a new adaptive routing scheme termed Lifetime-Aware Multipath Optimal Routing (LAMOR) for supporting high-speed real time video transmission in WANETs, which is optimized in terms of lifetime and analyze its characteristics. Both theoretical analysis and simulation results demonstrate that LAMOR indeed extends network lifetime and improves the transmission quality of video streams. © 2006 IEEE.
语种：
英文
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Improving the fairness of FAST TCP to new flows
作者：
Cui, Tony
* ;Andrew, Lachlan L. H.;Zukerman, Moshe;Tan, Liansheng
（ 期刊：
IEEE COMMUNICATIONS LETTERS ,2006年10(5):414-416 ISSN：1089-7798
通讯作者：
Cui, Tony
作者机构：
[Cui, Tony] Univ Melbourne, Natl ICT Australia Dept Elect & Elect Engn, ARC Special Res Ctr Ultra Broadband Informat Netw, Parkville, Vic 3010, Australia.;CALTECH, Dept Comp Sci, Pasadena, CA 91125 USA.;Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Peoples R China.
通讯机构：
[Cui, Tony] U;Univ Melbourne, Natl ICT Australia Dept Elect & Elect Engn, ARC Special Res Ctr Ultra Broadband Informat Netw, Parkville, Vic 3010, Australia.
关键词：
Buffer dimensioning;Congestion control;Fairness
摘要：
It has been observed that FAST TCP, and the related protocol TCP Vegas, suffer unfairness when many flows arrive at a single bottleneck link, without intervening departures. We show that the effect is even more marked if a new flow arrives when existing flows share bandwidth fairly, and propose a simple method to ameliorate this effect. © 2006 IEEE.
语种：
英文
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Active-time based bandwidth allocation for multi-hop wireless ad hoc networks
作者：
Zhang, Xiaomei
* ;Tan, Liansheng
（ ;Li, Jie;Zhao, Sufen;Chen, Hsiao-Hwa
期刊：
IEEE International Conference on Communications ,2006年8:3789-3794 ISSN：1550-3607
通讯作者：
Zhang, Xiaomei
作者机构：
[Tan, Liansheng; Zhang, Xiaomei; Zhao, Sufen] Cent China Normal Univ, Dept Comp Sci, Huazhong, Peoples R China.;[Li, Jie] Univ Tsukuba, Grad Sch Syst & Informat Engn, Tsukuba, Ibaraki 305, Japan.;[Chen, Hsiao-Hwa] Natl Sun Yat Sen Univ, Inst Commun Engn, Kaohsiung 80424, Taiwan.
通讯机构：
[Zhang, Xiaomei] C;Cent China Normal Univ, Dept Comp Sci, Huazhong, Peoples R China.
会议名称：
2006 IEEE International Conference on Communications, ICC 2006
会议时间：
11 July 2006 through 15 July 2006
摘要：
The application of multi-hop wireless Ad Hoc networks (WANETs) has been facing a great challenge to implement cooperative control over user transmission rates under the resource restrictions. In this paper, we propose an efficient bandwidth allocation scheme called Active-Time based Bandwidth Allocation Scheme (ATBAS) that can ensure fair bandwidth allocation among the users in a multi-hop WANET model. This scheme operates at each hop and fairly allots each competing flow a share of channel time, according to which each hop then computes the updating rate for each flow traversing the hop and records their updated rates into each data packet's special control header. The source of each flow in this scheme can eventually adjust its sending rate to reach its fair share. An algorithm is developed to implement the above mechanism. We will show through simulation results that our proposed algorithm is able to fairly distribute bandwidth among multi-hop flows. © 2006 IEEE.
语种：
英文
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无线网络资源分配和拥塞控制
项目作者单位：
华中师范大学
项目批准号：
60573118
资助经费：
5万
立项时间：
2006-01-01到2006-12-31
项目类别：
面上项目
项目来源：
国家自科基金项目
项目关键词：
无线网络;资源分配;拥塞控制;稳定性分析
项目摘要：
随着无线互联网多媒体业务的不断增长，无线网络资源分配和拥塞控制机制成为计算机无线网络领域中的主要研究课题之一。采用何种有效的策略使资源分配具有公平性和高效性是目前国内外无线网络研究领域的热点。由于无线网络时延大和信道时变的特点，我们必须研究有别于有线网络的拥塞控制策略，以便合理地利用有限资源，支持无线网络上的多媒体业务。因此本项目从多变量控制理论和随机优化理论的角度研究由资源分配和拥塞控制组成的综
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Effects of two-way traffic on TCP/AQM performance
作者：
Peng, Gang;Tan, Lian-Sheng
（ 期刊：
中山大学学报(自然科学版)(中英文) ,2006年45(SUPPL.):76-82 ISSN：0529-6579
通讯作者：
Peng, G.(g.peng@mails.ccnu.edu.cn)
作者机构：
[Tan, Lian-Sheng; Peng, Gang] Department of Computer Science, Central China Normal School, Wuhan 430079, China
通讯机构：
Department of Computer Science, Central China Normal School, China
关键词：
ACK;Congestion control;TCP/AQM;Two-way traffic
摘要：
Objective: To discuss the effects of two-way traffic on TCP/AQM (active queue management) performance and solution. Methods We analyze how the two-way traffic affects the TCP/AQM performance. Results: We propose a policy that configures the acknowledgments (ACKs)-priority scheduling (AP) combined with active queue management (AQM) scheme in both forwards and reverse direction of route queue. Conclusion: By using this policy, the ACKs compression and the queue oscillation can be eliminated. Simulations indicate that the algorithm remarkably increases the performance of TCP/AQM under two-way traffic both symmetric and asymmetric links.
语种：
英文
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Stability of TCP/RED systems in AQM routers
作者：
Tan, Liansheng
* （ ;Zhang, Wei;Peng, Gang;Chen, Guanrong
期刊：
IEEE Transactions on Automatic Control ,2006年51(8):1393-1398 ISSN：0018-9286
通讯作者：
Tan, Liansheng
（ 作者机构：
[Tan, Liansheng] Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Peoples R China.;City Univ Hong Kong, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R China.
通讯机构：
[Tan, Liansheng] C;Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Peoples R China.
关键词：
Active queue management (AQM);Random early detection (RED);Stability;Time-delay control
摘要：
By applying the time-delay control theory to a TCP/RED dynamic model, this note establishes some explicit conditions under which the TCP/RED system is stable in terms of the average queue length. Then, the stability region is discussed. Finally, the results are illustrated by using ns2 simulations, which demonstrates that it is able to choose an appropriate control parameter maxp of RED based on the stability conditions derived in this note, to achieve satisfactory network performance. It is found, by comparison, that this improved performance is better than that of three other typical active queue management (AQM) schemes - the random exponential marking (REM), proportional-integral (PI) controller, and adaptive virtual queue (AVQ) schemes. © 2006 IEEE.
语种：
英文
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分层视频组播应用中的全局视频质量
期刊：
计算机工程 ,2006年32(11):150-152+155 ISSN：1000-3428
作者机构：
[谭连生; 董莉娜] Department of Computer Science, Central China Normal University, Wuhan 430079, China
关键词：
分层视频组播;分层组播应用;全局视频质量;最优层速率
摘要：
提出了一种在分层视频组播应用中，组播源能根据组播应用类型选择最优层速率的方法，目的是提高组播组的全局视频质量。考虑到组播应用类型的不同，该文给出了一个全局质量因子（GQI），反映了接收端的满意程度（接收端总的视频质量下降程度），组播组占用的网络带宽和接收端视频质量的稳定性。这些指标可根据组播应用类型的不同进行调整。仿真验证，在使用GQI作为衡量组播组全局视频质量的标准时，能够保证所要优化的目标，达到用户的需求。
语种：
中文
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Router-level internet as a local-world weighted evolving network
作者：
Peng, Gang;Ko, King-Tim;Tan, Liansheng
（ ;Chen, Guanrong
期刊：
Dynamics of Continuous, Discrete and Impulsive Systems Series B: Applications and Algorithms ,2006年13(6):681-692 ISSN：1492-8760
通讯作者：
Chen, GR
作者机构：
[Tan, Liansheng; Peng, Gang] Department of Computer Science, Central China Normal University, Wuhan 430079, China;[Chen, Guanrong; Ko, King-Tim] Department of Electronic Engineering, City University of Hong Kong, Hong Kong, Hong Kong
通讯机构：
[Chen, GR ] ;Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Peoples R China.
关键词：
Internet;router;local-world network;weighted network;evolving network;MODEL
摘要：
For most networks in engineering and technology, the interplay of system dynamics, data traffics and network topology is critical to the network evolution and performance evaluation. Using the router-level Internet as a precise case study, this paper discusses a model that describes the growth of local-world weighted complex networks. This model combines the new vertices and new edges with the dynamical evolution of the weights locally, thereby generating a growing network with many statistical properties observed from real-world network examples. In particular, the model yields non-trivial time evolution of various vertex properties, including such as exponential and scale-free distributions of weights, strengths and degrees. Copyright ©2006 Watam Press.
语种：
英文
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A novel tree-based broadcast algorithm for wireless ad hoc networks
作者：
Tan, Liansheng
（ ;Zhan, Xiaoli;Li, Jie;Zhao, Fuzhe
期刊：
International Journal of Wireless and Mobile Computing ,2006年1(2):156-162 ISSN：1741-1084
通讯作者：
Li, J.(lijie@cs.tsukuba.ac.jp)
作者机构：
[Tan, Liansheng] Research School of Information Sciences and Engineering, Australian National University, Canberra ACT 0200, Australia;[Li, Jie] Department of Computer Science, Graduate School of Systems and Information Engineering, University of Tsukuba, Tsukuba Science City, Japan;[Zhan, Xiaoli; Zhao, Fuzhe] Department of Computer Science, Central China Normal University, Wuhan 430079, China
通讯机构：
Department of Computer Science, Graduate School of Systems and Information Engineering, University of Tsukuba, Japan
关键词：
wireless ad hoc networks;broadcasting redundancy;reachability;sensor networks;wireless networks;broadcast scheduling;simulation.
摘要：
One designing challenge in the scheduling of broadcast in wireless ad hoc networks is to reduce broadcast redundancy and provide high reachability, simultaneously. In this paper, we propose a broadcasting algorithm in wireless ad hoc networks. The algorithm uses two-hop neighbourhood information to construct the broadcast tree, in which the information can be gathered via exchanging 'hello' messages within the neighbour nodes. The channel is allocated to the non-leaf nodes in the broadcast tree in a time-oriented way to ensure that the forwarding of the broadcasted message along the broadcast tree is collision-free. Both theoretical analysis and simulation results demonstrate that our scheme is efficient in terms of the bounded broadcast redundancy and the highest reachability. Copyright ©2006 Inderscience Enterprises Ltd.
语种：
英文
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Price-based max-min fair rate allocation in wireless multi-hop networks
作者：
Tan, LS
* （ ;Zhang, XM;Andrew, LLH;Chan, S;Zukerman, M
期刊：
IEEE COMMUNICATIONS LETTERS ,2006年10(1):31-33 ISSN：1089-7798
作者机构：
[Tan, LS] Cent China Normal Univ, Dept Comp Sci, Wuhan, Peoples R China.;Univ Melbourne, ARC Special Res CUBIN, Dept Elect & Elect Engn, Natl ICT Australia, Melbourne, Vic, Australia.;City Univ Hong Kong, Dept Elect Engn, Hong Kong, Hong Kong, Peoples R China.
通讯机构：
[Tan, LS] C;Cent China Normal Univ, Dept Comp Sci, Wuhan, Peoples R China.
关键词：
Flow control;Max-min fairness;Rate allocation;Wireless networks
摘要：
The interaction between links in wireless multihop networks introduces extra constraints on the combinations of achievable flow rates. Algorithms have been proposed to achieve max-min fairness under these additional constraints. This letter provides a simple price-based max-min fair rate allocation scheme, building on a utility maximization scheme recently proposed for such networks.
语种：
英文
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复杂网络的自相似特性研究
作者机构：
[谭连生; 陶少华; 刘玉华; 杨春] 华中师范大学计算机科学系
会议名称：
2006全国复杂网络学术会议
会议时间：
2006-11
会议地点：
中国湖北武汉
关键词：
复杂网络;自相似性;容量维数;自相似网络群;信息传递
摘要：
复杂网络的自相似性具有广泛的实际背景。这种自相似性类似于社会关系网中的“物以类聚,人以群分”。本文从信息传递的角度阐述了自相似性网络形成的原因与过程,在数学理论上描述了信息传递过程,并首次提出自相似性网络群的概念。我们利用不同的最短路径作为尺度覆盖不同的局部网络以揭示复杂网络的自相似性,数值仿真和理论分析更真实地模拟与刻画了现实中许多复杂网络的演化及其特征。
语种：
中文
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一种新的基于非线性控制理论的主动式队列管理机制
期刊：
小型微型计算机系统 ,2006年27(1):50-53 ISSN：1000-1220
作者机构：
华中师范大学,计算机科学系,湖北,武汉,430079;[谭连生; 赵尔敦; 赵甫哲; 占小利] 华中师范大学
关键词：
主动队列管理;拥塞控制;非线性控制
摘要：
提出了一种新的基于非线性控制理论的主动式队列管理方案：NLC—RED．该方案在原有丢包率方程中增加了幂指数函数，静态的参数调节改进为动态的参数调节．仿真和分析表明，NLC—RED方案在缓冲队列占有量的稳定性和缓冲队列的丢包率等性能较Adaptive RED方案均有较大的提高．
语种：
中文
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一种高效的多跳无线网络广播协议
期刊：
小型微型计算机系统 ,2005年26(9):1459-1461 ISSN：1000-1220
作者机构：
[谭连生; 占小利; 赵甫哲; 王汉武] 华中师范大学计算机科学系;华中师范大学计算机科学系 湖北武汉430079
关键词：
广播;最多叶子最短生成树;无线网络
摘要：
广播操作是无线网络中一种常用的、重要的操作,通常采用泛洪来实现.无控制的泛洪会引起严重的竞争、冲突和拥塞,称为广播风暴问题.鉴此,本文提出了一种高效的无线网络广播协议.该协议通过根据网络拓扑图的最多叶子最短生成树来确定路由选择.分析和仿真结果说明,本文所提出的广播协议不仅能够避免冲突而且能够大大减少冗余的广播消息和减小广播延时.
语种：
中文
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关系数据库系统到XML数据转出的研究
期刊：
中国科技信息 ,2005年(05):31-20 ISSN：1001-8972
作者机构：
华中师范大学计算机系;英国拉夫堡大学计算机系
关键词：
XML数据;关系数据库系统;WEB应用;通用;数据格式;数据描述;要求;复杂;技术
摘要：
传统的数据库无法满足具有复杂数据处理要求的WEB应用,这是由于HTML本身不具备一种通用的数据格式能够描述转出数据的应用结构和相互间关系,而XML具有数据描述功能,它出现的弥补HTML在这方面的不足.本文在对关系数据库到XML数据转出进行了深入分析,探讨了如何在技术上实现从关系数据库系统到XML的数据转出.
语种：
中文
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On control gain selection in dynamic-RED
作者：
Tan, LS
* （ ;Yang, Y;Zhang, W;Zukerman, M
期刊：
IEEE COMMUNICATIONS LETTERS ,2005年9(1):81-83 ISSN：1089-7798
作者机构：
[Tan, LS] Cent China Normal Univ, Dept Comp Sci, Wuhan, Peoples R China.;Australian Res Council, Special Res Ctr Ultra Broadband Informat Networks, Melbourne, Vic, Australia.
通讯机构：
[Tan, LS] C;Cent China Normal Univ, Dept Comp Sci, Wuhan, Peoples R China.
关键词：
Active queue management;Congestion control;Random early detection (RED);Stability
摘要：
Based on control theory, this letter provides guidelines for the selection of the control gain for dynamic-RED to stabilize a congested queue at a target and hence to improve network performance. Simulations demonstrate that indeed satisfactory performance can be achieved if the control gain is selected based on the guidelines.
语种：
英文
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A graph-based proactive fault identification approach in computer networks
作者：
Yu, YJ;Liu, Q;Tan, LS
* （ 期刊：
Computer Communications ,2005年28(4):366-378 ISSN：0140-3664
作者机构：
[Tan, LS; Yu, YJ; Liu, Q] Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Peoples R China.
通讯机构：
[Tan, LS] C;Cent China Normal Univ, Dept Comp Sci, Wuhan 430079, Peoples R China.
关键词：
Connectivity;Connectivity structure;Fault identification;Graph theory;Internet control messages protocol;Network management;Simple network management protocol
摘要：
In large-scale computer networks, the isolation of the primary failure source is a challenging task. This article presents a proactive network fault diagnosis approach based on graph theory. Compared with other approaches, the manager of network management system checks the status of the managed devices actively rather than receive messages from those objects passively. The salient feature of this approach is that the possible failure sources, including the real one, can be computed precisely and quickly without any alarm historical information or strict assumptions. This approach does not introduce much processing complexity by taking full use of matrix and Boolean operations. To test and evaluate our proposed algorithm, it is implemented in Java and tested in a real large network environment. The experiment results show that this approach is not only efficient but also scalable on fault identification in large-scale computer networks. © 2004 Elsevier B.V. All rights reserved.
语种：
英文
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RPR环网中的一种带宽公平分配算法
期刊：
通信学报 ,2005年26(2):66-73 ISSN：1000-436X
作者机构：
[谭连生; 王汉武] 华中师范大学,计算机科学系
关键词：
RIAS公平;最小带宽;加权公平;P控制器;稳定性
摘要：
首先讨论了RPR网络中的公平性原则,然后结合该原则引入了一种适合于RPR网络的公平分配方案,基于该方案提出了一种能满足RPR环网性能要求的公平分配算法.该算法通过采用控制的方法为共享某链路的各数据流合理地分配带宽资源,从而达到:(1)各流的速率达到稳定;(2)链路缓存的占有量稳定到一个目标值;(3)链路带宽得到充分利用且实现公平分配.同时该算法能顺次协同地处理完网络中的各个链路,从而能够实现整个RPR环网的公平性与高的链路带宽利用率,达到RPR协议所要求的目标.给出了该算法的代码描述并对其作出稳定性分析,然后通过仿真对其性能进行了验证.
语种：
中文
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PDAVQ:一种基于PD控制的自适应虚拟队列管理算法
期刊：
通信学报 ,2005年26(3):39-44 ISSN：1000-436X
作者机构：
[谭连生; 杨燕; 熊乃学] 华中师范大学,计算机科学系
关键词：
自适应虚拟队列管理;稳定性;PD控制器;AVQ参数调整
摘要：
提出了一种新的基于比例差分控制的自适应虚拟队列管理(AVQ)算法-PDAVQ,用于对网络链路中产生的拥塞进行控制,以达到有效利用网络带宽,使整个网络系统达到稳定,缓解网络拥塞的目的.而且本文对所提算法运用控制理论对系统的稳定性进行了证明,给出了满足系统稳定性条件的参数选择方法和PDAVQ算法的具体描述.最后,通过ns2仿真实验与现有的AVQ算法比较,结果表明,所提PDAVQ算法具有较高的吞吐率、较低的链路延迟和数据丢失率,并能更快的使整个网络系统达到稳定,具有较好的网络性能.
语种：
中文
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基于XML技术的Web数据库信息发布系统的研究
期刊：
中国科技信息 ,2005年(5):32 ISSN：1001-8972
作者机构：
华中师范大学计算机系;英国拉夫堡大学计算机系
关键词：
WEB数据库;信息发布系统;XML技术;XML语言;数据库系统;超文本标记语言;世界;发展;目的
摘要：
Internet的出现和发展已经给这个世界带来了巨大的冲击,XML近几年来迅速崛起.设计XML的目的就在于使得在WEB上能以现有超文本标记语言(Hypertext Markup Language,简称HTML)的使用方式提供,接收和处理通用的SGMl成为可能.本文在介绍了XML语言及其在数据库系统中应用之后,对基于XML技术的Web数据库信息发布系统进行了研究.
语种：
中文
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