Reducing location update and paging costs in a PCS network

  • García Escalle P
  • Casares Giner V
  • Mataix Oltra J
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Abstract

Mobility tracking operations in a personal communication service
(PCS) system are signaling consuming. Several strategies have been
proposed in the literature to reduce both the location update (LU) and
the paging (PG) costs. In this paper, we propose a location-tracking
algorithm called three-location area (TrLA), combined with selective
paging. In TrLA, the mobile terminal (MT) allocates the identification
of three neighboring location areas (LAs) in its local memory. We call
this set of three LAs, a big-location area (BLA). Each time the MT exits
the BLA, it triggers an LU message to the system databases via a base
station, in order to maintain the databases up to date. The MT also
updates its cache memory. A two-step selective PG is also considered and
compared with the single-step (or nonselective PG). An analytical model
based on a semi-Markov process has been used to evaluate our proposal.
This scheme is compared with the classical Global System for Mobile
Communications (GSM) standard and the two-location algorithm proposal.
As a result, this new scheme outperforms the cited strategies, and in
our opinion, it can easily be implemented in existing standard cellular
and personal communication systems

Author-supplied keywords

  • Global strategy
  • Location update
  • Mobility tracking
  • Paging
  • Personal communications services systems

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Authors

  • Pablo García Escalle

  • Vicente Casares Giner

  • Jorge Mataix Oltra

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