Reducing call setup latency in mobile VoIP systems

Sangheon Pack, Gwangwoo Park, Younghyun Kim, Wonjun Lee

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


In mobile voice over IP (VoIP) systems, user mobility leads to the increased call setup latency to find out the current location of user, which has a negative impact on users call quality. In this letter, we propose a prefetching technique for user location to reduce the call setup latency. We develop an analytical model and investigate the impacts of mobility parameters and thresholds.

Original languageEnglish
Article number6008529
Pages (from-to)1126-1128
Number of pages3
JournalIEEE Communications Letters
Issue number10
Publication statusPublished - 2011 Oct

Bibliographical note

Funding Information:
This work was supported in part by the KCC under the R&D program supervised by the KCA (KCA-2011-10913-0500); by MKE under the ITRC program supervised by the NIPA (NIPA-2011-C1090-1011-0004); by NRF grant (2009-0064397); by WCU Project (R33-2008-000-10044-0); and by KRF grant (KRF-2008-314-D00354).


  • Mobile VoIP
  • SIP
  • location management

ASJC Scopus subject areas

  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering


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