Context-aware fault tolerance in migratory services

Mobile ad hoc networks can be leveraged to provide ubiquitous services capable of acquiring, processing, and sharing real-time information from the physical world. Unlike Internet services, these services have to survive frequent and unpredictable faults such as disconnections, crashes, or users turning off their devices. This paper describes a contextaware fault tolerance mechanism for our migratory services model. In this model, a per-client service instance transparently migrates to different nodes in the network to provide a continuous and semantically-correct interaction with its client. The proposed fault tolerance mechanism extends the primary-backup approach with a context-aware checkpointing process. The backup node is dynamically selected based on its distance from the client and service, the similarity of its mobility pattern with those of the client and service, the frequency of the checkpointing process, and the size of the checkpointing state. We demonstrate the feasib...

• Type: Conference
• Year: 2008
• Where: MOBIQUITOUS
• Authors: Oriana Riva, Josiane Nzouonta, Cristian Borcea
• Keywords: Ad Hoc Network, Backup Node, Communications, Fault Tolerance Mechanism, MOBIQUITOUS 2008