Title :
A Middleware Architecture for Replica Voting on Fuzzy Data in Dependable Real-time Systems
Author :
Ravindran, Kaliappa ; Kwiat, Kevin A.
Author_Institution :
City Univ. of New York, New York, NY, USA
Abstract :
Majority voting among replicated data collection devices enhances the trust-worthiness of data flowing from a hostile external environment. It allows a correct data fusion and dissemination by the end-users, in the presence of content corruptions and/or timing failures that may possibly occur during data collection. In addition, a device may operate on fuzzy inputs, thereby generating a data that occasionally deviates from the reference datum in physical world. In this paper, we provide a QoS-oriented approach to manage the data flow through various system elements. The application-level QoS parameters we consider are timeliness and accuracy of data. The underlying protocol-level parameters that influence data delivery performance are the data sizes, network bandwidth, device asynchrony, and data fuzziness. A replica voting protocol takes into account the interplay between these parameters as the faulty behavior of malicious devices unfolds in various forms during data collection. Our QoS-oriented approach casts the well-known fault-tolerance techniques, namely, 2-phase voting, with control mechanisms that adapt the data delivery to meet the end-to-end constraints - such as latency, data integrity, and resource cost. The paper describes a middleware architecture to realize our QoS-oriented approach to the management of replicated data flows.
Keywords :
fault tolerance; fuzzy systems; middleware; protocols; quality of service; real-time systems; sensor fusion; QoS-oriented approach; data fusion; data integrity; dependable real-time system; device asynchrony; fault-tolerance technique; fuzzy data; malicious device; middleware architecture; network bandwidth; protocol-level parameter; replica voting protocol; Bandwidth; Delay; Fault tolerance; Fusion power generation; Fuzzy systems; Middleware; Protocols; Real time systems; Timing; Voting; Majority voting; confusion probability; large data dimensionality; malicious faults; sensor replication; voter asynchrony;
Conference_Titel :
Communication Systems Software and Middleware, 2007. COMSWARE 2007. 2nd International Conference on
Conference_Location :
Bangalore
Print_ISBN :
1-4244-0613-7
DOI :
10.1109/COMSWA.2007.382564