UbiquitousCloudComputinghasbeenrecentlyproposedasanewhybridcomputingmodel.This paradigmhastwoaspects:(a)Makinguseofcloudservicestorealizecontext-awareness(especially formobilephones)and(b)Introducinganewandhybridcomputingmodel.Likewise,thispaper mainlyinvolvestwosubjects:Todeeplyinvestigatepreviouscloudservicesthathavebeenutilized to design context-aware systems, and to propose an open architecture for the "Ubiquitous Cloud Computing"paradigm.Theaimofthisarticleistotechnicallydiscussmutualtrendsofubiquitous and cloud computing, to foster the dissemination of state-of-the-art research in this area, and to presentfutureresearchdirections.