utilizing physical layer information to improve rfid tag
utilizing physical layer information to improve rfid tag
utilizing physical layer information to improve rfid tag
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may cause.<br />
Figure 6.7. Strong and weak <strong>tag</strong> collision waveform.<br />
For this evaluation, three data sets of 10,000 readings each are generated. Each data<br />
set follows a Poisson distribution. Data sets A and B have the same value of λ while<br />
dataset C has a different value. Each data set represents a unique RFID <strong>tag</strong>. Tags<br />
A and B have the same RFID chip and thus follow the same distribution. A fixed Q<br />
value of 5 giving 32 slots is used in this analysis. Thus in each of the 10,000 rounds<br />
the data set has an integer value between 1 and 32 denoting the slot chosen by the<br />
<strong>tag</strong>. Fig. 6.9 shows the his<strong>to</strong>gram for <strong>tag</strong>s A and B with a λ value of 10 while Fig. 6.10<br />
shows the his<strong>to</strong>gram for <strong>tag</strong> C with a λ value of 15. Analysis of the data gives<br />
the following result:<br />
Collisions when Tag A and B are in range = 898<br />
Collisions when Tag A and C are in range = 442<br />
30
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