Rf Interference Minimisation in Bio-Applications using Cr-Ad Hoc Network

The E-health applications uses wireless technology to transmit and receive vital information. However, Firstly there are certain associated risks like, electromagnetic interference exposure to bio-medical devices by wireless devices could critically affect their performance and secondly since different types of e-health applications have different priorities. So access to the wireless channel by the corresponding devices needs to be prioritized. In this paper a novel cognitive-radio-based approach to address these challenges in wireless communications for e-health applications in a hospital environment, is introduced. It protects the medical devices from harmful interference by adapting the cross-layer based cognitive radio multichannel medium access control (MAC) protocol with TDMA, which integrate the spectrum sensing at physical (PHY) layer and the packet scheduling at MAC layer, for the ad hoc wireless networks. Such kind of a protocol enables secondary users (SUs) to utilize multiple channels by switching channels dynamically, thus increasing network throughput. The proposed cognitive radio MAC (CR-MAC) protocol allows SUs to identify and use the unused frequency spectrum in a way that constrains the level of interference to the primary users (PUs)