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Wireless Sensor Networks (WSN) is neoteric progressing technology which addresses solutions to critical application environments. It allows the assimilation of medical sensors to form a group scenario which makes it feasible to remotely collect and communicate the physiological signals of a patient, thus preventing the patient from being tied to a particular set of monitoring medical instruments and thereby facilitate the patient's prior acquittal from the hospital. The sensor nodes adhered to the human body form a network and transmit the collected data to the medical server at a remote location via internet thus forming a Wireless Body Area Network (WBAN). We propose a framework for WBAN which discusses the working of the WBAN in three phases and the parameters which influence the working of each phase. Further the work also concentrates to generate a full fledged monitoring system for patient monitoring in health care.