A NOVEL CACHE REPLACEMENT ALGORITHM FOR COOPERATIVE CACHING IN WIRELESS MULTIMEDIA SENSOR NETWORKS
Vincent S. M. Tseng, Ming Hua Hsieh, Kawuu W. Lin · 2009
Abstract. In recent years, integrated applications with multimedia devices and wireless sensor networks promoted the evolution of wireless sensor networks, namely wireless mul-timedia sensor networks (WMSNs). The applications in WMSNs have to focus on both energy saving and application-level quality of service (QoS). Due to the characteristics in WMSNs, such as resource constraints and variable channel capacity, efficiently achieving the application-level QoS in WMSNs is a challenging task. To overcome this challenge, in this paper, we proposed a new kind of pattern named temporal region requesting pattern (TRRP) and a novel algorithm named TRRP-Mine for mining TRRPs efficiently. We also designed a temporal region requesting cost function of cache replacement, abbreviated as TRRC, for the cooperative caching multimedia content in WMSNs. Empirical eval-uations under various simulation conditions showed that the proposed method delivers excellent performance in terms of hit rate and the number of replacements.