Advancements in recent wireless technology, integrated circuit, electronic devices and autonomous sensing of physiological parameters, gave the birth of human monitoring system or short range wireless communication network, called Wireless Body Area Networks (WBANs). It is one of the major applications of Wireless Sensor Networks (WSNs), used in medical and as well as non-medical field. In WBAN, various tiny, intelligent, low powered and invasive/non-invasive sensor nodes are placed inside or outside the human body to collect the data. These sensor nodes are referred to as independent device with limited communication capabilities. Deployed sensor nodes are intended to early detection of various types of life threatening diseases viz. cancer, asthma etc., using different types of biomedical sensor nodes like ECG (Electrocardiogram), EEG (Electroencephalogram), pulse rate, temperature, blood pressure etc.