Table 3 The fuzzy linguistic expressions of input/output system variants

x ₁

Normalized value of the available channels

Input

B (big), M (middle), S (small)

x ₂

Average dropping probability

Input

H (high), M (medium), L (low)

x ₃

Average blocking probability

Input

H (high), M (medium), L (low)

y

Rate of acceptance of new calls

Output

H (high), MH (medium high), ML (medium low), L (low)