Performance Comparison of TCP Spoofing and End to End Approach to Enable Partial QoS on IP Based Network

Implementation has a purpose to give adequate guarantee for multimedia application to be able delivered according to the priority and the class of services. But basically, end to end QoS guarantee is very difficult to be realized, especially when it involves a lot of operators with a variety of interconnection networks such as Internet. To overcome that difficulty of implementing end-to-end QoS in IP-based networks, we propose a partial QoS approach through TCP spoofing technique. Partial QoS is implementation of QoS subset like bandwidth parameter in certain ip based network segment. TCP spoofing is a technique to intercept TCP connection between user and content server to be further manipulated. Each TCP connection will be intercepted by spoofing gateway and will be adjusted to the appropriate window size parameter that has been approved for each user. Spoofing Gateway will forward the request from the client to the content server and change the original TCP protocol to TCP Linux Highspeed. Our Simulation results, using NS-2.35, show that for some cases of Partial QoS through spoofing technique produced better performance, such as completion time and average throughput for each user class priority, compared to the end-to-end QoS approach. Even in cases where the Internet network delay product characteristics are relatively high, partial QoS spoofing technique has a much better performance than end-to-end QoS.