Dynamic periodic location area update in mobile networks

Yi-Bing Lin*, Pei Chun Lee, Imrich Chlamtac

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

32 Scopus citations


In mobile communications networks, periodic location area update (PLAU) is utilized to detect the presence of a mobile station (MS). In 3GPP Technical Specifications 23.012 and 24.008, a fixed PLAU scheme was proposed for the Universal Mobile Telecommunications System (UMTS), where the interval between two PLAUs is of fixed length. We observe that MS presence can also be detected through call activities and normal location area update (NLAU). Therefore, we propose a dynamic PLAU scheme where the PLAU interval is dynamically adjusted based on the call traffic and NLAU rate. An analytic model is developed to investigate the performance of dynamic and fixed PLAU schemes. This paper provides guidelines to select parameters for dynamic PLAU.

Original languageEnglish
Pages (from-to)1494-1501
Number of pages8
JournalIEEE Transactions on Vehicular Technology
Issue number6
StatePublished - 1 Nov 2002


  • Mobile communications network
  • Mobility management
  • Periodic location area update
  • Universal mobile telecommunications system (UMTS)

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