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Previous issue date: 2007 / Conselho Nacional de Desenvolvimento Científico e Tecnológico / The Transmission Control Protocol (TCP) is responsible for supplying reliable data
transport service on the TCP/IP stack and for carrying most than 90% of all Internet traffic.
In addition, the stability and efficiency of the actual TCP congestion control mechanisms
have been extensively studied and are indeed well known by the networking community.
However, new Internet applications and functionalities continuously modify its traffic
characteristics, demanding new research in order to adapt TCP to the new reality of the
Internet.
In particular, a traffic phenomenon known as "mice and elephants" has been
motivating important researches around the TCP. The main point is that the standard TCP
congestion control mechanisms were designed for elephants leading small flows to
experience poor performance. This is caused by the exponential behavior of Slow Start
which often causes multiple packet losses due their aggressive increase.
This work examines minutely the problems caused by the standard TCP congestion
control to mice flows as well as it studies the most important proposals to solve them. Thus,
based on such research studies, a modified TCP startup mechanism was proposed. The
Burst TCP (B-TCP) is an intuitive TCP modification that employs a responsive congestion
window growth scheme based on the current window size, to improve performance for
small flows. Moreover, B-TCP is easy to implement and requires TCP adjustment at the
sender side only.
Simulation experiments show that B-TCP can significantly reduce both transfer times
and packet losses for small flows without causing damage to large flows
| Identifer | oai:union.ndltd.org:IBICT/oai:repositorio.ufpe.br:123456789/2710 |
| Date | January 2007 |
| Creators | Gonçalves, Glauco Estácio |
| Contributors | Sadok, Djamel Fawzi Hadj |
| Publisher | Universidade Federal de Pernambuco |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Source | reponame:Repositório Institucional da UFPE, instname:Universidade Federal de Pernambuco, instacron:UFPE |
| Rights | info:eu-repo/semantics/openAccess |
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