This paper describes the formal verification of a fault-tolerant group membership algorithm that constitutes one of the central services of the Time-Triggered Protocol (TTP). The group membership algorithm is formally specified and verified using a diagrammatic representation of the algorithm. We describe the stepwise development of the diagram and outline the main part of the correctness proof...

This paper presents a design and implementation of a scheme for accurate measurement of network bandwidth in xDSL networks, including asymmetric upstream and downstream cases. A stepwise algorithm is designed to minimize the effect of ATM traffic shaping for ABR and UBR service classes in xDSL deployments on the bandwidth measurements. The accuracy of the algorithm is achieved by implementing a...