Nomadicity: anytime, anywhere in a disconnected world
Mobile Networks and Applications - Special issue on mobile computing and system services
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There is an increasing demand for realizing communication services for nomadic environments, capable to provide applications with mobility management facilities and application-aware adaptation support. This paper proposes a novel mobility management and communication architecture specifically suited for nomadic environments, offering communication facilities and adaptation support by means of an API, named NCSOCKS. The driving idea is to provide application and middleware developers of nomadic services with essential mobility-enabled communication support, while hiding network heterogeneity in terms of wireless technology and leveraging the availability level of communication in spite of transient signal degradations. Transient signal degradations, due to device movements and/or shadowing, have the effect of increasing the handoff frequency. The proposed architecture integrates a novel mechanism to improve the connection availability by reducing the number of unnecessary handover procedures. In order to evaluate the proposal, an approach based on combined use of simulation and prototype-based measurements is adopted.