(a)

Figure 5.2a.  An increase in transmitted serial packets also affects the throughput of radar packets at the RAD display station. The new and original packet routing systems maintain near optimal throughput between 34 Hz and 56 Hz. After 56 Hz the original system becomes unstable with up to 50% variability in radar packet throughput. The new system increases radar packet throughput by increasing the priority of the Communication-thread sending packets to the RAD display station.  A ‘high’ line represents the best radar packet throughputs observed for the set of generated serial packet transmissions, while a ‘low’ line represents the worst radar packet throughputs observed.
 

(b)

Figure 5.2b.  The new packet routing system maintains optimal serial packet throughput with serial packet transmissions of 34 Hz through 56 Hz.  Between 56 Hz and 86 Hz serial packet throughput levels off. Beyond 86 Hz throughput drops sharply. At 34 Hz, the original system is already routing serial packets at a sub-optimal rate. 56 Hz shows a 50% increase in throughput, but throughput remains at this level, regardless of greater increases in serial packet transmissions.  A ‘high’ line represents the best serial packet throughputs observed for the set of generated serial packet transmissions, while a ‘low’ line represents the worst serial packet throughputs observed.