Cognitive radio for flexible mobile multimedia communications
Mobile Networks and Applications - Special issue on Mobile Multimedia Communications (MOMUC '99)
Wireless sensor networks: A survey on the state of the art and the 802.15.4 and ZigBee standards
Computer Communications
Wireless Sensor Networks
Cognitive radio sensor networks
IEEE Network: The Magazine of Global Internetworking - Special issue title on networking over multi-hop cognitive networks
Enabling coexistence of heterogeneous wireless systems: case for ZigBee and WiFi
MobiHoc '11 Proceedings of the Twelfth ACM International Symposium on Mobile Ad Hoc Networking and Computing
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Wireless communication services, including Wireless Sensor Networks (WSNs), emerge in healthcare environments with a variety of e-health applications collecting medical data and patient information. Possible WSN ambient surveillance in hospitals (which is of secondary importance) must consider the coexistence challenges with the wireless technologies that collect the medical data and minimize the impact towards the medical devices that operate in the same frequency band. To mitigate the interference problems WSNs may efficiently utilize the dynamic spectrum access techniques introduced by the cognitive radio (CR). This paper presents a proof-of-concept for CR enabled wireless sensor network deployed in medical surroundings. The proof-of-concept is performed on a Sun SPOT testbed platform. It demonstrates the WSNs ability to dynamically adjust the transmission parameters (i.e. frequency) thus minimizing the interference to the wireless systems of primary importance in the hospital environments.