QoS in Interconnection of Next Generation Networks

Transition to Next Generation Networks is likely to raise questions about how inter-operator interconnections should take place in a heterogeneous environment. The NGN architecture introduces several degrees of complexity, requiring decisions on issues like the layers and planes at which the interconnection among different service provider. domains should take place and how adequate quality of service can be ensured, over the interconnection, for various services. While intra-operator QoS in NGN is well researched and applied, inter-operator QoS is complex and still being discussed in academia, international standards bodies and industry. This paper proposes metrics for intra and inter domain QoS in a heterogeneous environment and tests it with actual data. It is seen that a combination of selected parameters from measurements taken from operational networks and operator reported data, show a strong correlation with the QoS reflected by consumer surveys.