t_ij

Traffic sending request from VPN i to j

U_i

Upper bound bandwidth for VPN i

B_k

Total bandwidth shared in the host k

$A_i^t$

Tx Access bandwidth guarantee for VPN i

G_ij

Pair Bandwidth guarantee from i to j

T_i

Traffic sending request of VPN i

t_ij

Traffic sending request from VPN i to j

U_i

Upper bound bandwidth for VPN i

B_k

Total bandwidth shared in the host k

$A_i^t$

Tx Access bandwidth guarantee for VPN i

G_ij

Pair Bandwidth guarantee from i to j

T_i

Traffic sending request of VPN i