Handoff Based Secure Checkpointing and Log Based Rollback Recovery for Mobile Hosts

An efficient fault tolerant algorithm based on movement-based secure checkpointing and logging for mobile computing system is proposed here. The recovery scheme proposed here combines independent checkpointing and message logging. Here, the authors consider mobility rate of the user in checkpointing so that mobile host can manage recovery information such as checkpoints and logs properly so that a mobile host takes less recovery time after failure. Mobile hosts save checkpoints when number of hand-off exceeds a predefined hand-off threshold value.