Limitations of Fixed Timers for Wireless Links

  • George Xylomenos
Part of the Lecture Notes in Computer Science book series (LNCS, volume 4330)


Traditional reliable link layer protocols set their fixed retransmission timers under the assumption that they operate in isolation over the link. Emerging wireless networks however allow multiple link layer sessions to dynamically share the link. To assess the impact of this development, we examine the performance of Web Browsing over a Selective Repeat protocol with fixed retransmission timers, showing that the optimal retransmission timer values depend on the level of contention. We therefore propose an adaptive Selective Repeat protocol that modifies its retransmission timers based on prevailing conditions. Our measurements show that this adaptive scheme provides excellent Web Browsing performance regardless of the level of contention, under two very different wireless error models.


Wireless Link Internet Protocol Round Trip Time Link Layer Universal Mobile Telecommunication System 
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Copyright information

© Springer-Verlag Berlin Heidelberg 2006

Authors and Affiliations

  • George Xylomenos
    • 1
  1. 1.Mobile Multimedia Laboratory, Department of InformaticsAthens University of Economics and BusinessAthensGreece

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