Performance Analysis of QoS-Aware Layer-2 VPNs Over Fiber-Wireless (FiWi) Networks

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The integration of Ethernet Passive Optical Networks (EPONs) and IEEE 802.16 (WiMAX) has been lately presented as a promising FIber-WIreless (FiWi) broadband access network. Conversely, lightweight layer-2 Virtual Private Networks (VPNs) over FiWi, which can provide bandwidth guarantee to the respective users, were only recently addressed by Dhaini et. al. In this paper, WiMAX-VPON, the framework proposed by Dhaini et. al to support layer-2 VPNs over EPON-WiMAX, is improved to take into account the polling control overhead when distributing the VPN bandwidth. A new generic analytical model is also presented to evaluate the performance of each registered VPN service.