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The term “Ubiquitous Sensor Networks” (USN) is used to describe networks of intelligent sensor nodes that could be deployed “anywhere, anytime, by anyone and anything”. The technology has huge potential as it could generate applications in a wide range of civilian and military fields, including ensuring safety and security, environment and habitat monitoring, and realtime healthcare. Earlier research shows that it is highly suitable for monitoring purposes in military use and also biomedical applications. However, there isn’t any flexible and robust communication infrastructure to integrate these devices into an emergency care setting. An efficient wireless communication substrate for medical devices that addresses ad hoc or fixed network formation, naming and discovery, security and authentication, as well as filtration and aggregation of vital sign data need to be studied. This research is aimed at developing a system that is able to provide continuous monitoring of patients outside the hospital environment. The potential application outcomes among others; cutting the cost of medical services and saves many important lives.