An adaptive handoff management for fault tolerant mobile computing

Due to the mobility of mobile hosts, checkpoints and message logs of the computing process may disperse over different mobile support stations in the checkpointing and rollback recovery protocol for mobile computing. Three existing checkpoint handoff schemes do not give well consideration to the efficiency of failure-free process execution and the recovery speed of the failure process at the same time. A dynamic adaptive handoff management of the checkpointing and rollback recovery protocol for mobile computing is proposed in this paper. According to the individual feature and current state of each mobile host, different implementations are selected dynamically to complete the handoff process upon the handoff event. Performance analyses show that the proposed handoff management incurs a low loss of performance during failure-free and achieves a quick recovery upon the process fault.