Euro-Par '02 Proceedings of the 8th International Euro-Par Conference on Parallel Processing
An efficient time-based checkpointing protocol for mobile computing systems over mobile IP
Mobile Networks and Applications - Mobile networking through IP
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Recent information systems consist of mobile stations and fixed stations. Mission critical applications are required to be executed fault-tolerantly in these systems. However, mobile stations support neither enough volume of storage, processing power nor capacity of battery to support reliable communication and computation. Thus, it is difficult for multiple mobile stations to synchronously take checkpoints. This paper, we proposes a hybrid checkpointing protocol where mobile stations take asynchronously and fixed ones take synchronously checkpoints. In addition, mobile stations store messages into logs for getting local states consistent with checkpoints taken by fixed stations. For supporting wireless LAN protocols such as IEEE 802.11 and HIPERLAN, messages are stored into a log in a mobile support station without exchanging additional messages even with mobile-to-mobile communication.