  Advances in wireless communication, system on chip and low power sensor nodes
allowed realization of Wireless Body Area Network (WBAN). WBAN comprised of
tiny sensors, which collect information of patient's vital signs and provide a
real time feedback. In addition, WBAN also supports many applications including
Ubiquitous HealthCare (UHC), entertainment, gaming, military, etc. UHC is
required by elderly people to facilitate them with instant monitoring anywhere
they move around. In this paper, different standards used in WBAN were also
discussed briefly. Path loss in WBAN and its impact on communication was
presented with the help of simulations, which were performed for different
models of In-Body communication and different factors (such as, attenuation,
frequency, distance etc) influencing path loss in On-Body communications.
