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An Easy way to Reduce SCTP Failover Times
Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. (DISCO)ORCID iD: 0000-0003-4147-9487
Karlstad University, Faculty of Economic Sciences, Communication and IT, Department of Computer Science. (DISCO)
2005 (English)In: Proceedings of the Third Swedish National Computer Networking Workshop: SNCNW2005, 2005Conference paper, (Refereed)
Abstract [en]

To enable interoperability between the public switched telephone network and IP, the IETF SIGTRAN working group has developed an architecture for the transportation of SS7 signaling traffic over IP. The architecture is based on a new transport protocol, the Stream Control Transmission Protocol (SCTP), that is designed to meet SS7 requirements. However, recent work suggests that the SCTP failover mechanism has difficulties complying with the SS7 requirements of ITU-T. To this end, this paper suggests using a modified retransmission timeout strategy which involves using a relaxed backoff factor of less than 2, the standard value specified in RFC 2960. Through simulations, it is shown that significant improvements in failover time, and thus in increased permissible network delays, could be obtained with this backoff strategy in well-dimensioned and controlled network environments. However, the simulations also stress the importance of running signaling traffic over managed IP networks. In the simulations where the signaling traffic competed with uncontrolled cross traffic, none of the studied backoff factors made SCTP compliant with ITU-T.

Place, publisher, year, edition, pages
2005.
Keyword [en]
SCTP, failover, SIGTRAN, retransmission, timeout, backoff
National Category
Telecommunications
Research subject
Computer Science
Identifiers
URN: urn:nbn:se:kau:diva-11802OAI: oai:DiVA.org:kau-11802DiVA: diva2:505573
Conference
Third Swedish National Computer Networking Workshop (SNCNW)
Projects
Reliable and secure communication in SCTP
Available from: 2012-02-24 Created: 2012-02-24 Last updated: 2014-09-04Bibliographically approved

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