Handling latency in broadcast disk system for mobile computing

The rapidly expanding technology of cellular communications, wireless local area network (LAN), wireless data networks and satellite will give mobile users capability of accessing information anywhere and anytime. Data broadcasting algorithm plays an important role as it instructs the server to disseminate large amount of data at fast rate and send to many mobile clients. One of the work known as Broadcast Disk method is creating a sequence of slots containing data and broadcasting them in circular manner to the air. Mobile clients keep listening to the air and catch those slots that interest them. However based on Broadcast Disk method, some slots are empty, which results into bandwidth waste and client waiting time increment. Empty slots are randomly exists which difficult to locate. In this paper we enhance the Broadcast Disk method to overcome the empty slots aims to reduce the latency of users in accessing the service. We manage to locate these empty slots and fill them with popular data. We show by case studies and simulation that our scheme eliminates empty slots and minimizes client latency.