Web Caching in Broadcast Mobile Wireless Environments
IEEE Internet Computing
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FAST '03 Proceedings of the 2nd USENIX Conference on File and Storage Technologies
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The recent advances in miniaturization and the creation of low-power circuits, combined with small-sized batteries have made the development of wireless sensor networks a working reality. Lately, the production of cheap CMOS cameras and microphones gave birth to what is called Wireless Multimedia Sensor Networks (WMSNs). WMSNs will boost the capabilities of current wireless sensor networks, and will fuel several novel applications. WMSNs introduce several research challenges, related to the delivery of application-level Quality-of-Service (e.g., latency minimization). To address this goal in an environment with extreme resource constraints, with variable channel capacity and with requirements for multimedia in-network processing, the efficient and effective caching of multimedia data, exploiting the cooperation among sensor nodes is vital. This paper presents for the first time a cooperative caching solution particularly suitable for WMSNs. The proposed solution is evaluated extensively in an advanced simulation environment, and it is compared to the state-of-the-art cooperative caching algorithm for mobile ad hoc networks.