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Báo cáo hóa học: " Research Article TCP-Friendly Bandwidth Sharing in Mobile Ad Hoc Networks: From Theory to Reality"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article TCP-Friendly Bandwidth Sharing in Mobile Ad Hoc Networks: From Theory to Reality | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2007 Article ID 17651 14 pages doi 10.1155 2007 17651 Research Article TCP-Friendly Bandwidth Sharing in Mobile Ad Hoc Networks From Theory to Reality Evgeny Osipov1 and Christian Tschudin2 1 Department of Wireless Networks RWTH Aachen University 52072 Aachen Germany 2 Computer Science Department University of Basel 4056 Basel Switzerland Received 30 June 2006 Revised 13 December 2006 Accepted 11 January 2007 Recommended by Marco Conti This article addresses a problem of the severe unfairness between multiple TCP sessions in a wireless context also known as TCP capture phenomenon. We present an adapted max-min fairness framework to the specifics of MANETs. We introduce a practically implementable cross-layer network architecture which enforces our formal model. We have verified with simulations and real world experiments that under our adaptive rate limiting scheme unfair behavior virtually vanishes. The direct consequence of this work guaranteed stable services for TCP-based applications in MANETs including traditional FTP web as well as for UDP-based sessions. Copyright 2007 E. Osipov and C. Tschudin. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Poor and unstable TCP performance over multihop wireless links is one of the stumbling blocks which prevents mobile ad hoc networks MANETs from wide deployment and popularization. TCP capture as is described in 1 is one of the unsolved problems in MANETs which manifests itself in extremely unfair distribution of network bandwidth between competing sessions. The problem of the unfairness is a feature of inadequate behavior of the congestion control mechanism of TCP in radio transmission medium. The major assumption for TCP s congestion control .