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Issues in Nomadicity as described by Kleinrock (1995)

Issues in Nomadicity as described by Kleinrock (1995)

Issues in Nomadicity as described by Kleinrock (1995)

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<strong>Issues</strong> <strong>in</strong> <strong>Nomadicity</strong> <strong>as</strong> <strong>described</strong> <strong>by</strong> Kle<strong>in</strong>rock (<strong>1995</strong>)1Enable <strong>in</strong>teroperation among many k<strong>in</strong>ds of <strong>in</strong>fr<strong>as</strong>tructures (e.g., wirel<strong>in</strong>e andwireless)Deal with unpredictability of user behavior, network capability and comput<strong>in</strong>gplatformProvide for graceful degradationScale with respect to heterogeneity, address space, quality of service (QoS),bandwidth, geographical dimensions, number of users, and so onProvide the user with an <strong>in</strong>dication of the QoS he or she is currently receiv<strong>in</strong>g,the size of files about to be downloaded and so onProvide for <strong>in</strong>tegrated access to servicesAllow for ad hoc access to servicesDeliver maximum <strong>in</strong>dependence between the network and the applications fromthe users’ viewpo<strong>in</strong>t <strong>as</strong> well <strong>as</strong> from the development viewpo<strong>in</strong>tRelieve the user from reconfigur<strong>in</strong>g or reboot<strong>in</strong>g each time the mode ofcommunication access changes


Match the nature of what is transmitted to the bandwidth availability (i.e.,compression, approximation, partial <strong>in</strong>formation, etc.)Enable cooperation among system elements such <strong>as</strong> sensors, actuators, devices,network, operat<strong>in</strong>g system, file system, middleware, services, applications and soforthAn <strong>in</strong>tegrated software framework which presents a common virtual network layerAppropriate replication services at various levelsFile synchronizationPredictive cach<strong>in</strong>gConsistency servicesIntelligent (adaptive) datab<strong>as</strong>e managementLocation services (to keep track of people andDiscovery of resources2

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