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Mobile ad hoc networks have attracted more and more research attention by providing of wireless communications without location limitations and pre-built infrastructures. Due to the lack of static supporting structures, ad hoc networks are prone to several limitations, such as bandwidth, connectivity and power. Multimedia retrieval is a challenging task in ad hoc networks due to the multiple limitations. To provide an efficient platform for multimedia retrieval, we propose to cluster multimedia data based on their semantic content, then construct a virtual hierarchical infrastructure overlaid on the ad hoc network. The rationale of semantic-based clustering is discussed. The effectiveness of the proposed scheme was investigated through theoretical analysis and simulation.
Date of Conference: 13-16 June 2005