An adaptive distance-based location update algorithm for next-generation PCS networks

TitleAn adaptive distance-based location update algorithm for next-generation PCS networks
Publication TypeJournal Article
Year of Publication2001
AuthorsWong, V. W. S., and V. C. M. Leung
JournalSelected Areas in Communications, IEEE Journal on
Pagination1942 -1952
Date Publishedoct.
Keywordsadaptive distance-based location update algorithm, cell residence time, cell topologies, cellular environment, cellular radio, mobile user, neighboring base stations, next-generation PCS networks, optimal update boundary, paging, paging communication, personal communication networks, radio bandwidth, stochastic model, table lookup, update boundary

In this paper, we propose a stochastic model to compute the optimal update boundary for the distance-based location update algorithm. The proposed model is flexible and captures some of the real characteristics in the wireless cellular environment. The model can adapt to arbitrary cell topologies in which the number of neighboring base stations at different locations may vary. The cell residence time can follow general distributions which captures the fact that the mobile user may spend more time at certain locations than others. The model also incorporates the concept of a trip in which the mobile user may follow a particular path to a destination. For implementation, the decision of location update can be made by a simple table lookup. Numerical results indicate that the proposed model provides a more accurate update boundary in real environment than that derived from a hexagonal cell configuration with a random walk movement pattern. The proposed model allows the network to maintain a better balance between the processing incurred due to location update and the radio bandwidth utilized for paging between call arrivals


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