The increase in average lifespan, growing population and sedentary lifestyle has increased the need for ubiquitous healthcare services. Wireless Body Area Network (WBAN) is one such approach which serves as a promising health monitoring service. Several sensors are implanted in or attached to human body to monitor the health status of the patients. The obtained physiological information from patient is transmitted to the doctor so that the patient will be constantly and remotely monitored. Thus, WBAN provides location flexibility to the patients. Nevertheless, security and privacy issues are one of the downsides in adopting WBAN to its full advantage. The medical records are private and confidential. Hence for a patient to trust WBAN, physiological information captured by the sensors need to be reliably transmitted to the doctors. Another issue is the limited battery life of sensors. It is crucial for WBANs to have a longer network lifetime to avoid constant recharging and replacement of nodes attached to a patient. This is possible by proposing energy efficient routing protocols for lowering energy consumption. These protocols should also reduce the network traffic by reducing the size of the data before transmission. The current work proposes an energy efficient approach for secure transmission of patient data to higher medical personnel. The proposed work extends the work of Rel-AODV protocol by considering compression model and cost based function having parameters of delay and residual energy. The results show that the proposed methodology is energy efficient and improves the overall QoS of the system.

WBAN, Wireless Body Area Networks, Routing Protocols, Cost Function, Energy efficiency, QoS

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