Research Article
WLAN Cell Handoff Latency Abatement Using an FPGA Fuzzy Logic Algorithm Implementation
Table 3
Parameters of membership functions.
| Linguistic variable | Linguistic term | Type of function | Parameters |
| Average signal intensity | Low | Trapezoidal |
−80
|
−80
|
−70
|
−50
| Medium | Triangular |
−60
|
−50
|
−40
| | Good | Triangular |
−50
|
−40
|
−30
| | Excellent | Trapezoidal |
−40
|
−30
|
−20
|
−20
|
| Signal intensity variation | Negative | Trapezoidal |
−3
|
−3
|
−2
|
0
| Zero | Triangular |
−1
|
0
|
1
| | Positive | Trapezoidal |
0
|
1
|
3
|
3
|
| Aptitude | Negative | Trapezoidal |
−2
|
−2
|
−1
|
−0.5
| Small Negative | Triangular |
−1
|
−0.5
|
0
| | Zero | Triangular |
−0.5
|
0
|
0.5
| | Small Positive | Triangular |
0
| |
1
| | Positive | Trapezoidal |
0.5
|
1
|
2
|
2
|
|
|