Eliminating tromboning mobile call setup for international roaming users

Yi-Bing Lin*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Existing mobile service providers allow their customers to receive telecommunications services when they roam to other countries. However, in the standard mobile call setup procedure, a call from the visited country to a roaming customer at that country results in two international calls. This phenomenon is referred to as the tromboning effect. In this paper, we propose a third-party solution that resolves the tromboning problem by replacing two international calls with two local calls. Besides huge saving in voice/data path, analytic modeling and simulation experiments indicate that our solution is effective in call setup signaling. Also, our solution does not need to modify the existing mobile telecommunications systems.

Original languageEnglish
Article number4786512
Pages (from-to)320-325
Number of pages6
JournalIEEE Transactions on Wireless Communications
Issue number1
StatePublished - 1 Jan 2009


  • International roaming
  • Mobile telecommunications service
  • Mobility management
  • Tromboning
  • Voice over IP (VoIP)

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