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Effects on TCP from radio-block scheduling in WCDMA high speed downlink shared channels
Luleå University of Technology, Department of Computer Science, Electrical and Space Engineering, Computer Science.
Ericsson Research, Luleå.
2003 (English)In: Quality for all: 4th COST 263 International Workshop on Quality of Future Internet Services, QoFIS 2003, Stockholm, Sweden, October 1-2, 2003 : proceedings / [ed] Gunnar Klarlsson; Michael I. Smirnov, Berlin: Encyclopedia of Global Archaeology/Springer Verlag, 2003, 214-223 p.Conference paper (Refereed)
Abstract [en]

Avoiding delay jitter is essential to achieve high throughput for TCP. In particular, delay spikes can cause spurious timeouts. Such timeouts force TCP into slow-start, which may reduce congestion window sizes drastically. Consequently, there may not always be data available for transmission on bottleneck links. For HS-DSCH, jitter can occur due to varying interference. Also, properties of the radio-block scheduling influence the jitter. We evaluate, through simulations, effects on TCP from scheduling. Our evaluation shows that round-robin (RR) schedulers can give more jitter than SIR schedulers. SIR schedulers discriminates low SIR users to improve spectrum utilization while RR schedulers distribute transmission capacity fairly. The high jitter with RR scheduling cause however both lower utilization and decreased fairness in throughput among users than with SIR scheduling. The Eifel algorithm makes TCP more robust against delay spikes and reduces thereby these problems

Place, publisher, year, edition, pages
Berlin: Encyclopedia of Global Archaeology/Springer Verlag, 2003. 214-223 p.
Series
Lecture Notes in Computer Science, ISSN 0302-9743 ; 2811
Research subject
Dependable Communication and Computation Systems
Identifiers
URN: urn:nbn:se:ltu:diva-39982DOI: 10.1007/b13241Local ID: ef0a9ae0-fc26-11de-bae5-000ea68e967bISBN: 978-3-540-20192-2OAI: oai:DiVA.org:ltu-39982DiVA: diva2:1013502
Conference
COST 263 International Workshop on Quality of Future Internet Services : 01/10/2003 - 02/10/2003
Note
Validerad; 2003; 20100108 (andbra)Available from: 2016-10-03 Created: 2016-10-03Bibliographically approved

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