Prioritization of Patient Vital Signs Transmission Using Wireless Body Area Networks - E-Healthcare Systems and Wireless Communications - page 281

Figure 9. Fairness comparison

on time axis, while the error due to loss of data
can be identified by noticing the voltage of the
signals. Compared with the original signal, it is
clear that 'Red' patient experiences the least loss
and delay, while 'Green' patient has the largest
loss and delay. Sign errors for different classes
due to packet loss are compared in Figure 10(b).
Note that the received signs are raw received
data and the lost data are padded with zeros.
Sophisticated signal processing techniques can

be applied for better signal recovery. In this chap-
ter we focus on providing a solution for in-hos-
pital networks so using better signal processing
techniques is left as future work.

FUTURE RESEARCH DIRECTIONS

Existing solutions for patient vital sign monitoring
are still preliminary. There is still a lot of work to

Figure 10. Effects on vital signs