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In wireless body sensor networks (WBSNs), sensors continuously monitor human physiological activities using medical sensors, for example, blood pressure, body temperature and electrocardiography (ECG). A WBSN can be used to develop a patient monitoring system. The traditional body sensor networks (BSNs) have limited hardware resources in terms of computational capabilities, data processing speed,...
This paper gives an overview of the channel access methods of three wireless technologies that are likely to be used in the environment of vehicle networks: IEEE 802.15.4, IEEE 802.11 and Bluetooth. Researching the coexistence of IEEE 802.15.4 with IEEE 802.11 and Bluetooth, results of experiments conducted in a radio frequency anechoic chamber are presented. The power densities of the technologies...
IEEE 802.15.4, the basic standard behind ZigBee, is a low-power communication standard mostly operating in the free 2.4 GHz Industrial, Scientific and Medical (ISM) frequency band. This band is heavily used by many technologies sending with more power, therefore avoiding interference is an important task and knowledge of the spectrum is essential. This paper presents an algorithm and its actual implementation...
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