Just-in-time delivery of events in event notification service systems for mobile users

Abstract

Advances in wireless network technology and the increasing number of handheld mobile devices enable service providers to offer several services to mobile users. Event notification service (ENS) system is a useful mean to push information to selective users and the same service can also be extended to mobile users. But mobility may cause delay in transferring subscriptions from the previous event server to the current event server and establishing new routes of notifications. This delay is not tolerable for many real-life applications, like stock exchanges, auction and traffic condition monitoring. In this paper, we propose an algorithm that ensures the timely delivery of published events to all interested mobile users with the help of regional route map which is a physical route map of a small neighborhood of the locations of mobile hosts. © IFIP International Federation for Information Processing 2004.