The debate over network neutrality, which did not exist before, started with the introduction of next generation access network and the entrance of new Internet application services such as VoIP and IPTV. Most of the newly developed services use more bandwidth and are more sensitive to latency than earlier application services (Frischmann and van Schewick, 2007). Nevertheless, Internet protocol (IP) cannot distinguish latency sensitive applications from latency insensitive applications because of its basic principle of “best effort.”