Hybrid Location-Update Scheme for Mobile Networks

Goo Yeon Lee, Yong Lee, Z.J. Haas
2009 IEEE Transactions on Vehicular Technology  
In this paper, we propose a hybrid location-update scheme, which combines the time-and movement-based locationupdate approaches. In the proposed scheme, a mobile user updates its location after the following two events have occurred: First, the mobile crossed n cell boundaries, and then, a time interval T elapsed. We also examine the inverse scheme, where an update is performed after the n boundary crossings occur subsequent to the time interval T . We evaluate our scheme by applying it to
more » ... us mobility models, such as exponential cell-residence times with a constant mobility pattern, exponential cell-residence times with a gamma-distributed mobility pattern, hyperexponential cell-residence times, and cell-residence times with a small coefficient of variation. From our numerical analysis and simulation results, we learn that the movement-based-only method (i.e., T = 0) performs well when the coefficient of variation of the cell-residence time is relatively small. However, when the coefficient of variation is large, the proposed hybrid scheme (i.e., T > 0, n > 0) outperforms each of the two approaches, namely, the time-and movement-based location-update schemes, when these schemes are individually applied. Index Terms-Hybrid-location update, mobile networks, movement-based location update, time-base location update.
doi:10.1109/tvt.2008.923661 fatcat:wwe4es76mbcqvmpjvjfw5eotqi