A PROFILE-BASED LOCATION STRATEGY AND ITS PERFORMANCE

Future microcellular personal communications systems (PCS's) will be c haracter;zed by high user density and high mobility, It is expected th at registrations will incur a large amount of the radio link signaling traffic. A profile-based strategy (PBS) is proposed to reduce the sig naling traffic on the radio link by increasing the intelligence within the fixed network, The system maintains a sequential list of the most likely places where each user is located, The list is ranked from the most to the least likely place where a user is found, When a call arr ives for a mobile, it is paged sequentially in each location within th e list. When a user moves between location areas in this list, no loca tion update is required, The list may be provided by the user or may b e based on each user's past calling history, The method for doing this is outside the scope of this work, This work focuses on the potential performance improvements that can result from maintaining such a list , This paper compares the performance of the proposed strategy to the typical geographic-based location-tracking schemes being implemented i n evolving digital cellular and cordless standards, Key performance me asures for the comparison are radio bandwidth, fixed network SS7 traff ic, and call setup delay, We investigate the conditions under which PB S performs better than the traditional scheme, Results indicate that o ver a wide range of parameters, it may be possible to reduce both the radio bandwidth and fixed network signaling load for a modest increase in call setup delay.