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Analysis of TFRC in Disconnected Scenarios and Performance Improvements with Freeze-DCCP

Abstract : We present enhancements to the TCP-Friendly Rate Con- trol mechanism (TFRC) which are designed to better cope with the intermittent connectivity available to mobile devices or in Delay Tolerant Networks. Our aim is to prevent losses during disconnected periods and quickly adapt to new network conditions. We propose to suspend the transmission before disconnections occur in a way inspired by Freeze-TCP, then probe, in a new way, the network after reconnecting to enable full use of the newly available bandwidth. We first evaluate the potential performance gains for realistic network parameters. We then describe the proposed additions to TFRC and their implementation within the Datagram Congestion Control Protocol (DCCP) in ns-2. Comparisons of simulation results for example mobility scenarios show that the proposed enhancements enable faster recovery upon reconnection as well as significantly improved adjustment to the newly available network conditions.
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Contributor : Olivier Mehani Connect in order to contact the contributor
Submitted on : Tuesday, November 29, 2011 - 5:57:59 PM
Last modification on : Friday, February 4, 2022 - 3:12:53 AM


  • HAL Id : hal-00646372, version 1


Olivier Mehani, Roksana Boreli, Thierry Ernst. Analysis of TFRC in Disconnected Scenarios and Performance Improvements with Freeze-DCCP. MobiArch 2009 - The 4th ACM International Workshop on Mobility in the Evolving Internet Architecture, Jun 2009, Kraków, Poland. pp.n/a. ⟨hal-00646372⟩



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