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However, existing context data dissemination infrastructures still present several limitations: they are unable to adaptively exploit impromptu any wireless communication opportunity; they are unable to scale, especially in wide\/densely populated environments; and they are prone to connection\/device flaws. The article proposes a novel context-aware middleware that achieves adaptability, scalability, and dependability in context data dissemination through three main core guidelines: by using a distributed hierarchical architecture, by employing lightweight and adaptive context data dissemination solutions, and by adopting statistical context data\/query replication techniques. The performance results, obtained by extensively testing the proposed solution in our wireless university campus testbed, have validated our design choices.<\/p>","DOI":"10.4018\/jaras.2010071704","type":"journal-article","created":{"date-parts":[[2010,4,16]],"date-time":"2010-04-16T11:57:06Z","timestamp":1271419026000},"page":"58-74","source":"Crossref","is-referenced-by-count":6,"title":["Towards Adaptive and Scalable Context Aware Middleware"],"prefix":"10.4018","volume":"1","author":[{"given":"Antonio","family":"Corradi","sequence":"first","affiliation":[{"name":"Universit\u00e0 di Bologna, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mario","family":"Fanelli","sequence":"additional","affiliation":[{"name":"Universit\u00e0 di Bologna, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luca","family":"Foschini","sequence":"additional","affiliation":[{"name":"Universit\u00e0 di Bologna, Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"2432","reference":[{"key":"jaras.2010071704-0","doi-asserted-by":"publisher","DOI":"10.1504\/IJAHUC.2007.014070"},{"issue":"1","key":"jaras.2010071704-1","first-page":"18","article-title":"Mobility-Aware Middleware For Self-Organizing Heterogeneous Networks With Multihop Multipath Connectivity. 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