SENSE AND CACHE – A NOVEL CACHING SCHEME FOR MOBILE USERS IN A CELLULAR NETWORK

Abstract:- Internet, the largest database in the universe has become an indispensable source of information in every ones life. With the tremendous growth in cellular network infrastructures, there is a need from the mobile users also to access the internet on the fly. As the users in a cellular network switch between base stations frequently, caching is used to improve the internet access of mobile users. Several caching schemes available in literature cache the documents in a single central database which can be accessed by any mobile user. To increase the data availability, caching on mobile devices is also used. Though these schemes provide the documents requested by the mobile user at some point in time, they fail to provide uninterrupted internet access to mobile users during handoff. Moreover, as the documents are cached in a single central database, when more users request for the cached documents, these schemes increase their response time and the possibilities of congestion in the network. To overcome these problems, a novel sense and cache scheme which prefetches and keeps the documents ready once a mobile user enters the coverage area of a base station and which periodically exchanges a Mobile Prediction Vector between base stations to provide uninterrupted internet access to mobile users is proposed in this paper