QoS performance in IP over PetaWeb optical network

The dramatic growth of the Internet traffic and corresponding specific IP service requirements motivate the Internet service providers, network equipment manufacturers, and researchers not only to focus on scalability and cost effectiveness of the next generation optical network architecture design, but also on the need to provide assured quality of service (QoS) for Internet applications. We address the issues of supporting the QoS in one alternative optical network called PetaWeb network, proposed by Nortel Networks. PetaWeb is based on the use of adaptive core and edge switches, which can accommodate traffic fluctuations through reconfiguration of channels periodically. In order to achieve end-to-end QoS over PetaWeb network, a QoS-aware edge node and QoS-aware channel allocation algorithm come in consideration. This increases the effective capacity of the network, reduces packet loss and packet delay, so satisfying the desired services. Simulations are also implemented to evaluate and verify the network QoS performance.