On IP-VPN Fairness Control Mechanism using AIMD Window Flow Control

In recent years, IP-VPN (IP-based Virtual Private Network) that realizes a virtual dedicated line on the existing IP network has been capturing the spotlight. However, in the conventional IP-VPN, there is a problem that the fairness among IP-VPN customers is not guaranteed. In this paper, we therefore propose an IP-VPN fairness control mechanism called I2VFC (Interand Intra-VPN Fairness Control) for realizing a fair IP-VPN service at low cost. Our I2VFC performs an AIMD (Additive Increase and Multiplicative Decrease) window flow control between ingress and egress provider edge routers and realizes fairness among VPNs. Notable features of our I2VFC includes that with our I2VFC IP-VPN service provider can freely specify fairness criteria and that our I2VFC can be easily deployed to existing IP networks since modification only to provider edge routers are necessary.