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An alternative strategy (AS) for location management has been
proposed for improvingthe classical strategy (CS) for location
management used in GSM. It significantlyreduces the location
update signaling traffic on the radio link by increasing
theresponsibility of the fixed network. The AS stores the mobile
related informationand brings great savings in system resources
when a mobile host (MH) has a highpredictable mobility pattern.
However, the AS is only suitable for long term eventsand fixed
movement tracks. It's location tracking will cost more when the
MH changesits movement habit or encounters some short term
events. In this paper, we proposea novel method which aims at
reduction of signaling overhead resulting from locationtracking
in the above situations. The key idea is taking the recent user
movementinformation (i.e., last connection's location area and
start time of the lastconnection), that is called paging
information record, into account to determinewhich location area
to be paged first. Performance analysis has been conducted
usinga city area zone model which can model a realistic city
area environment. Experimentalresults show that our method can
reduce 14\% - 55\% and 6\% - 39\% location management's
signaling cost compared with the CS and AS, respectively.
Besidesmaintaining low location update cost as that of AS, our
intelligent location trackingstrategy achieves a significant
reduction in location tracking cost than the AS. Theoverhead of
our approach is the additional storage space required (for
storing MHprofiles and paging information records) in network
databases and the additionalprocessing time of profiles and
paging information records. However, neither the storage nor the
processing time requirements can be considered significant in
termsof today's memory capacity and processor speed as far as
the reduction of signalingtraffic implying more bandwidth
available.
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