FAST TCP over optical burst switched networks: Modeling and stability analysis

Basem Shihada, Sami El-Ferik, Pin-Han Ho

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


FAST TCP is important for promoting data-intensive applications since it can cleverly react to both packet loss and delay for detecting network congestion. This paper provides a continuous time model and extensive stability analysis of FAST TCP congestion-control mechanism in bufferless Optical Burst Switched Networks (OBS). The paper first shows that random burst contentions are essential to stabilize the network, but cause throughput degradation in FAST TCP flows when a burst with all the packets from a single round is dropped. Second, it shows that FAST TCP is vulnerable to burst delay and fails to detect network congestion due to the little variation of round-trip time, thus unstable. Finally it shows that introducing extra delays by implementing burst retransmission stabilizes FAST TCP over OBS. The paper proves that FAST TCP is not stable over barebone OBS. However, it is locally, exponentially, and asymptotically stable over OBS with burst retransmission.
Original languageEnglish (US)
Pages (from-to)107-118
Number of pages12
JournalOptical Switching and Networking
Issue number2
StatePublished - Apr 2013

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering


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