Improving the Performance of TCP in the Presence of Interacting UDP Flows in Ad Hoc Networks

Gupta, Varun; Krishnamurthy, Srikanth V.; Faloutsos, Michalis

doi:10.1007/978-3-540-24693-0_6

Cited by 11 publications

(10 citation statements)

References 17 publications

(37 reference statements)

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“…Gupta et al [19] discuss the case where TCP flows are degraded by heavily loaded UDP flows in a static ad hoc network. In this case, the authors showed that increasing the RL value allows improvement of TCP goodput without diminishing UDP flow goodput.…”

Section: Related Workmentioning

confidence: 99%

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Cross‐layer design to improve elastic traffic performance in WLANs

2007

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SUMMARYIn this paper, we are interested in improving TCP flow performance when a short loss of 802.11 signal leads to losing segments and triggers inappropriately TCP congestion control mechanisms. A set of measurements in a common wireless environment with signal losses due to mobility or interference is made to highlight the distinct MAC and TCP loss recovery levels and the lack of interactions between them. Initially, we demonstrate the interest of adapting the 802.11 MAC layer Retry Limit parameter in the case of signal losses due to distance or obstacles (mobility). Thus, a first-level loss differentiation algorithm (LDA) acting at the MAC layer is proposed to improve TCP flow performance in the case of segment losses due to mobility. Hence, for a signal failure, the MAC layer reacts consequently by dynamically adapting the Retry Limit parameter. This adaptation allows avoiding a costly end-to-end TCP loss recovery. Segment losses due to interference are differentiated from those due to congestion through the use of a second-level LDA. The latter is a cross-layer LDA acting at the TCP layer but using a specific 802.11 parameter, the AckFailureCount, to realize the targeted loss differentiation. The TCP NewReno version is then adapted in order to integrate the cross-layer LDA results and to avoid reducing the TCP congestion window unsuitably. The efficiency and completeness of a solution integrating both LDA schemes is then discussed.

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Section: Related Workmentioning

confidence: 99%

“…However, as far as we know all the studies concerning TCP performance enhancements [17][18][19] were conducted in static multihop ad hoc environments.…”

Section: Related Workmentioning

confidence: 99%

Cross‐layer design to improve elastic traffic performance in WLANs

2007

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“…Many MAC protocols have been proposed to improve TCP performance [14]- [16]. The scheme in [17] can detect the degradation of TCP performance in the presence of UDP, which has been considered only in ad hoc networks. Several schemes in [18]- [20] improve the performance by giving more channel access to AP than STAs.…”

Section: Related Workmentioning

confidence: 99%

Virtual Multi-AP Access for Transport-Level Quality Improvement in Wireless Local Area Networks with Hidden Stations

Nishide

Kubo

Shinkuma

et al. 2010

IEICE Trans. Inf. & Syst.

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SUMMARYThe demand of using applications that assume bidirectional communication such as voice telephony and peer-to-peer using wireless stations has been increasing and especially, the rapid increase of uplink traffic from wireless terminals is expected. However, in uplink WLANs, the hidden-station problem remains to be solved. In this paper, we point out this hidden-station problem and clarify the following unfairness between UDP and TCP uplink flows: 1) the effect of collision caused by hiddenstation relationship on throughput and 2) the instability of the throughput depending on the number of hidden stations. To solve these problems, we propose a virtual multi-AP access mechanism. Our mechanism first groups stations according to the hidden-station relationship and type of transport protocol they use then assigns a virtually isolated channel to each group, which enables STAs to communicate as if STAs in different groups are connected to different isolated APs (virtual APs: VAPs). It can mitigate the effect caused by collisions between hidden stations and eliminate the contention between UDP and TCP uplink flows. Its performance is shown through simulation.

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“…This work has lead to two conferences [Gupta02,Gupta04] and is being submitted to a journal. More details on this project can be found there.…”

Section: Denial Of Service Attacks At the Mac Layer In Manetsmentioning

confidence: 99%

Secure Wireless Fault Tolerant Tunable Networks (SWIFT)

Ravishankar¹,

Krishnamurthy²,

Faloutsos³

et al. 2005

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REPORT DOCUMENTATION PAGEForm Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Washington Headquarters Services, Directorate for Information Operations and Reports, 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302, and to the Office of Management and Budget, Paperwork Reduction Project (0704-0188), Washington, DC 20503 AGENCY USE ONLY (Leave blank)2. REPORT DATE AUGUST 2005 REPORT TYPE AND DATES COVEREDFinal Jul 01 -Sep 04 TITLE AND SUBTITLE SECURE WIRELESS FAULT TOLERANT TUNABLE NETWORKS (SWIFT) AUTHOR(S)Chinya V. Ravishankar, Srikanth Krishnamurthy, Michalis Faloutsos and Satish Tripathi FUNDING NUMBERSC -F30602-01-2-0536 PE -62301E PR -FTNP TA -M0 WU -99 PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)University of California at Riverside Regents of the University of California 200 University Office Building Riverside California 92521 PERFORMING ORGANIZATION REPORT NUMBERN/A SPONSORING / MONITORING AGENCY NAME(S) AND ADDRESS(ES)Defense 12b. DISTRIBUTION CODE ABSTRACT (Maximum 200 Words)The scope of this project was to explore the interplay between security and performance. We have succeeded in exploring a large cross section of ideas on work in a total of 12 different projects, which fall naturally into three distinct areas. The first area deals with mechanisms for improving the performance of wireless ad-hoc networks. In this category, projects included improving TCP (Transmission Control Protocol) throughput, supporting group communication, routing, and on MAC (Media Access Control) layer enhancements for Mobile Ad Hoc Networks or MANETS.The second general area concerns security. Our suite of projects in this domain cover the areas of key agreement, false report filtering, key establishment using pre-distribution, a public-key distribution mechanism using Secure DNS (Domain Name Service), and a study of issues in denial-of-service attacks in MANETs.The final topic area involves the management of mobility. We have developed some very innovative approaches to handling complex spatio-temporal queries when objects move along road networks. This work represents a significant contribution to both wireless networking as well as to data management. Using proxies alleviates this problem by constraining the region that is captured to the region between proxies rather than between the source and the destination. Our results using the ns 2.0 simulation package were presented at IEEE GLOBECOM 2002 [KKF02]. NUMBER OF PAGES List of Tables 2We also implemented Split TCP in a Linux-based experimental set up. We had six laptops and one of the laptops was configured to be the proxy. The node that acted as the proxy carried ...

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Improving the Performance of TCP in the Presence of Interacting UDP Flows in Ad Hoc Networks

Cited by 11 publications

References 17 publications

Cross‐layer design to improve elastic traffic performance in WLANs

Cross‐layer design to improve elastic traffic performance in WLANs

Virtual Multi-AP Access for Transport-Level Quality Improvement in Wireless Local Area Networks with Hidden Stations

Secure Wireless Fault Tolerant Tunable Networks (SWIFT)

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