Architecting Dependable Systems VII by Themistoklis Bourdenas, Morris Sloman, Emil C. Lupu (auth.),

By Themistoklis Bourdenas, Morris Sloman, Emil C. Lupu (auth.), Antonio Casimiro, Rogério de Lemos, Cristina Gacek (eds.)

As software program structures develop into more and more ubiquitous, problems with dependability develop into ever extra the most important. on condition that suggestions to those concerns needs to be thought of from the very starting of the layout technique, it really is transparent that dependability and safety need to be addressed on the architectural point. This ebook, in addition to its six predecessors, was once born of an attempt to assemble the study groups of software program architectures, dependability, and protection. This cutting-edge survey comprises increased, peer-reviewed papers in response to chosen contributions from the Workshop on Architecting in charge structures (WADS 2009), held on the foreign convention on in charge structures and Networks (DSN 2009), in addition to a few invited papers written via popular specialists within the zone. The thirteen papers are equipped in topical sections on: cellular and ubiquitous platforms, architecting platforms, fault administration, and adventure and vision.

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Thus, simulation can help us to understand the relative performances of the two protocols. Before ending this section, we remark that the optimizations based on the wellknown triangular inequality described in [2] can be applied to the final communication graphs produced by both NTC-PL and NTC-PLU. In order to apply these optimizations, which are aimed at identifying edges in the communication graph that can be pruned without impairing connectivity and symmetry, it is sufficient that every node, at the end of the protocol execution, sends a message containing its list of symmetric neighbors.

Furthermore, multi-hop routing to the sink adds significant (possibly unbounded) delays for message delivery, which may prove inappropriate for applications where event propagation time is critical, such as health-care. A hybrid, hierarchical approach, that assigns local managers inside the network, pushes decision making closer to affected node and reduces traffic towards the sink. Management frameworks, such as [22,21], focus on the network and node level and cater for fail-stop faults involving connectivity and energy depletion of nodes.

Of the 4th International Workshop on Body Sensor Networks (BSN), Aachen, Germany (2007) 21. : Sympathy for the sensor network debugger. In: Proceedings of the 3rd International Conference on Embedded Networked Sensor Systems, SenSys 2005, San Diego, USA, pp. 255–267 (2005) 22. : Fault management in event-driven wireless sensor networks. In: Proceedings of the 7th ACM International Symposium on Modeling, Analysis and Simulation of Wireless and Mobile Systems, MSWiM 2004, Venice, Italy, pp. 149–156 (2004) 23.

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