Current mobile devices are equipped with multistandard interfaces to fully utilize both the existing and the imminent Public Land Mobile Network infrastructure. This flexibility comes with significant energy consumption overheads at the mobile terminal side and thus, the adopted interface / network selection scheme, a.k.a. Vertical Handover mechanism, should be based on both Quality of Service oriented and energyefficiency criteria. This paper summarizes the current state of the art on energy-centric vertical handover algorithms, discusses weak aspects of existing approaches and presents a novel contextaware vertical handover framework towards energy-efficiency. Rather than a pure energy-centric vertical handover scheme, this framework is a context-awareness enabler for energy-centric vertical handover decision making.
Network processing emerged as a discipline in the mid-1990s prior to the dot-com bubble, driven by expectations of ever increasing network connectivity services and data rates. While much of that hi-tech rush was focused on silicon for network processors and has vanished over the subsequent decade, some of its main characteristics have turned into lasting traits of many mainstream products for networking beyond the sole Internet core-materializing mostly around functional decomposition and offloading of protocol processing workloads to specialized search and packet processors.
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