Rapid fault detection and recovery for IP telephony

Mark Karol, P. Krishnan, J. Jenny Li

Research output: Contribution to journalConference articlepeer-review

2 Scopus citations

Abstract

Short, low-bandwidth keep-alive packets can be injected into VoIP packet streams to rapidly detect faults and deteriorating network conditions (e.g., increasing delay, jitter, or loss). The keep-alive packets can be duplicated and also used to continuously monitor and compare the delay and loss characteristics of primary and alternate network paths, and thereby help control the rapid switchover of calls (in-progress and future) to alternate routing paths (or the circuit-switched PSTN) when faults or deteriorating QoS conditions are detected. By simultaneously transmitting copies of keep-alive packets over multiple paths to make the differential delay measurements and comparisons, the proposed techniques avoid many common synchronization and timing errors. We examine various performance tradeoffs and describe several ways to implement the proposed architectures and techniques.

Original languageEnglish
Pages (from-to)1484-1489
Number of pages6
JournalConference Record - International Conference on Communications
Volume3
DOIs
StatePublished - 2004
Event2004 IEEE International Conference on Communications - Paris, France
Duration: 20 Jun 200424 Jun 2004

Keywords

  • Fault Tolerance
  • Keep-Alive
  • Redundancy
  • VoIP

Fingerprint

Dive into the research topics of 'Rapid fault detection and recovery for IP telephony'. Together they form a unique fingerprint.

Cite this