An adaptive location registration scheme with dynamic mobility classification

An adaptive location registration scheme is proposed for wireless cellular networks. A high speed mobile on a highly directed path does not need to update its location as long as the mobile maintains its speed and direction since the network can predict the location of the mobile using the mobile's speed and direction information. On the other hand, for a mobile doing a random walk, the location prediction using the speed and direction information is inefficient in terms of the signaling cost and prediction accuracy. With this observation, we dynamically classify mobiles based on the predictability of their trajectory. A mobile with predictable trajectory is prescribed a predictive distance-based location update scheme and a mobile with random trajectory is prescribed a (non-predictive) distance-based location update scheme. The performance of the adaptive scheme is compared with the predictive and non-predictive schemes.