18-01-2013, 04:41 PM
SKIN PLEX
SKIN PLEX.pptx (Size: 157.55 KB / Downloads: 31)
INTRODUCTION
Body coupled communications is a physical layer technology
here the signals travels through the body as with radio.
The electric field of the body is modified so that a message can
be sent and received.
These devices communicate to each other and send data to an
off body location for processing.
Body sensor networks have to deal with more dynamic
environment than wireless sensor nodes .
This allows the signal to be received from a greater distance,
leading to privacy concerns.
CHARACTERIZATION
The body coupled communications has to be examined with the following criteria.
Reliability
Power usage & data transmission speed
Privacy & safety
Software & Applications
RELIABILITY
Reliability has two components,
How reliable does the signal travel around the body.
How is the signal affected by other signals.
POWER USAGE & DATA TRANSMISSION SPEED
Practical body sensor networks need a fair amount bandwidth
available.
But having a fast network that consumes a lot of power.
The transmission speed of body coupled networks is a significant
problem that there was a maximum of 852 Kbit/s.