Perfect Failure Detection in Timed Asynchronous Systems
IEEE Transactions on Computers
A Comprehensive Model for Software Rejuvenation
IEEE Transactions on Dependable and Secure Computing
Failure detectors for wireless sensor-actuator systems
Ad Hoc Networks
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Certain gateways (e.g., some cable or DSL modems)are known to have low reliability and low availability.Most failures of these devices can however be "fixed"by rejuvenating the device after a failure has been detected.Such a detection based rejuvenation strategypermits increasing the availability of these gateways.In the considered scenario, rejuvenation is non-trivialsince a failure of such a gateway will leave it partitionedaway from the network.In particular, networkoperators that want to rejuvenate these gateways arein a different network partition, and can therefore notinitiate a remote rejuvenation.In this paper we propose a failure detection based rejuvenation service and a remote detection service. Therejuvenation service detects and faxes "soft" failures automatically (in one partition), and the detection servicedetects (in another partition) all rejuvenations exactlyonce, within a bounded amount of time, even whenthe gateway is rejuvenated consecutively.The detectionservice also allows the detection of "hard" failures, andfiltering of notifications of soft failures.