IEEE 802.15.6 is the first WBAN standard that serves various medical and non medical applications and supports communications inside and around the human body. IEEE 802.15.6 standard uses different frequency bands for data transmission including: The Narrowband (NB) which includes the 400, 800, 900 MHz and the 2.3 and 2.4 GHz bands; the Ultra Wideband (UWB), which uses the 3.111.2 GHz; and the Human Body Communication (HBC) which uses the frequencies within the range of 1050 MHz. This standard is a step forward in wearable wireless sensor networks as it is designed specifically for use with a wide range of data rates, less energy consumption, low range, ample number of nodes (256) per body area network and different node priorities according to the application requirements.