Manel Fredj

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The problem we deal with in this paper is the dynamic substitution of stateful services that become unavailable during the execution of service orchestrations. Previous research efforts focusing on the reconfiguration of conventional distributed systems enable the substitution of system entities with other prefabricated passive entities that serve as a(More)
This chapter establishes a common base for discussing re-configurability in distributed software systems in general and in pervasive systems in particular, by introducing a generic reconfiguration cycle. Following this cycle, we discuss in detail three former efforts on recon-figurable pervasive systems, and draw conclusions about the capacity of existing(More)
The B3G (Beyond 3G) networking will enable mobile users to roam freely through heterogeneous networks on an all-IP platform. However, mobility handling in such an environment poses new challenges. Traditionally, mobility protocols such as Mobile IP, SIP and SCTP are used to manage mobility in B3G, but they require telecommunication companies to either(More)
The B3G (Beyond 3G) concept enables mobile users to roam freely through heterogeneous networks on an all-IP platform [1]. Specifically, we view B3G networks as an infrastructure-less aggregation of heterogeneous infrastructure-based and ad hoc networks. As part of the PLASTIC project [2], we are developing a middleware for service continuity in(More)
The requirement for higher Security and Dependability (S&D) of systems is continuously increasing, even in domains tradi-tionally not deeply involved in such issues. Nowadays, many practitioners express their worries about current S&D software engineering practices. New recommendations should be considered to ground this discipline on two pillars:(More)
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