Fault tolerance and availability in mobile computing environment

Wireless technology provides the service of being connected, while on move. As computer and wireless communication technology advances, handheld devices are entering in the arena of mobile computing. It can be seen that small wireless devices like PDA (Personal Digital Assistant) will dominate the mobile computing environment in future world However, because of lack of resources and high mobility, PDAs need integrated fault-tolerant mechanisms to ensure their computational progress. In this paper, we present our classification of faults, experienced by mobile devices and then we present our architectural framework to provide availability for applications running on mobile devices. Our approach takes into account the nature of application and provides suitable fault tolerance mechanism as per the requirements of every application.