Adaptive fractional window increment of TCP in multihop ad hoc networks

We propose an adaptive fractional window increasing algorithm (AFW) to improve the performance of the fractional window increment (FeW) in (Nahm et al., 2005). AFW fully utilizes the bandwidth when the network is idle, and limits the operating window when the network is congested. We evaluate AFW and compare the total throughput of AFW with that of FeW in different scenarios over chain, grid, random topologies and with hybrid traffics. Extensive simulation through ns2 shows that AFW obtains 5% higher throughput than FeW, whose throughput is significantly higher than that of TCP-Newreno, with limited modifications.

[1]  Christoph Lindemann,et al.  TCP with adaptive pacing for multihop wireless networks , 2005, MobiHoc '05.

[2]  Nitin H. Vaidya,et al.  Analysis of TCP Performance over Mobile Ad Hoc Networks , 1999, Wirel. Networks.

[3]  Ieee . Wg.  Part 11 : Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specification , 2003 .

[4]  Raj Jain,et al.  A Quantitative Measure Of Fairness And Discrimination For Resource Allocation In Shared Computer Systems , 1998, ArXiv.

[5]  David B. Johnson,et al.  The Dynamic Source Routing Protocol for Mobile Ad Hoc Networks , 2003 .

[6]  Songwu Lu,et al.  How bad TCP can perform in mobile ad hoc networks , 2002, Proceedings ISCC 2002 Seventh International Symposium on Computers and Communications.

[7]  Rajendra V. Boppana,et al.  A comparison of TCP performance over three routing protocols for mobile ad hoc networks , 2001, MobiHoc '01.

[8]  Ahmed Helmy,et al.  TCP over multihop 802.11 networks: issues and performance enhancement , 2005, MobiHoc '05.

[9]  QUTdN QeO,et al.  Random early detection gateways for congestion avoidance , 1993, TNET.

[10]  Yuguang Fang,et al.  Improving Transport Layer Performance in Multihop Ad Hoc Networks by Exploiting MAC Layer Information , 2007, IEEE Transactions on Wireless Communications.

[11]  Xinbing Wang,et al.  Vegas-W: An Enhanced TCP-Vegas for Wireless Ad Hoc Networks , 2008, 2008 IEEE International Conference on Communications.

[12]  Mario Gerla,et al.  Enhancing TCP fairness in ad hoc wireless networks using neighborhood RED , 2003, MobiCom '03.

[13]  Haiyun Luo,et al.  The impact of multihop wireless channel on TCP throughput and loss , 2003, IEEE INFOCOM 2003. Twenty-second Annual Joint Conference of the IEEE Computer and Communications Societies (IEEE Cat. No.03CH37428).

[14]  Klara Nahrstedt,et al.  On setting TCP's congestion window limit in mobile ad hoc networks , 2003, IEEE International Conference on Communications, 2003. ICC '03..