Flexible on-device service object replication with replets

Abstract

An increasingly large amount of such applications employ service objects such as Servlets to generate dynamic and personalized content. Existing caching infrastructures are not well suited for caching such content in mobile environments because of disconnection and weak connection. One possible approach to this problem is to replicate Web-related application logic to client devices. The challenges to this approach are to deal with client devices that exhibit huge divergence in resource availabilities, to support applications that have different data sharing and coherency requirements, and to accommodate the same application under different deployment environments.The Replet system targets these challenges. It uses client, server and application capability and preference information (CPI) to direct the replication of service objects to client devices: from the selection of a device for replication and populating the device with client-specific data, to choosing an appropriate replica to serve a given request and maintaining the desired state consistency among replicas. The Replet system exploits on-device replication to enable client-, server-and application-specific cost metrics for replica invocation and synchronization. We have implemented a prototype in the context of Servlet-based Web applications. Our experiment and simulation results demonstrate the viability and significant benefits of CPI-driven on-device service object replication.

Mobile Aid for Haemophilia Injury Recognition

“…However, data synchronization issues in mobile networks are more challenging due to the limitations imposed on bandwidths in wireless networks and the intermittent loss in connectivity. These challenges lead to high communication latency during update managements and sometimes updates are unsuccessfully propagated when the mobile is in a disconnected state [9,10].…”

Systems Development Methodology for Mobile Commerce Applications

“…The power of m-commerce is primarily due to the anytime-anywhere connectivity of wireless devices, which provide enormous opportunities for business process innovation and location-sensitive services (Zwass, 2003). And with the increasing popularity of mobile appliances, the most effective means of providing these services in a wireless mobile environment should be found (Zhou, Islam, & Ismael, 2004). However, careful consideration should be taken when developing mobile commerce applications since they are utilized in different contexts from those typical e-commerce, they are mobility and portability.…”