ITU-T Recommendations

ITU-T Recommendation G.1050 describes a model for evaluating multimedia transmission performance over an IP network. It is a statistical model in which likelihood of occurrence values are assigned to all network elements and impairments. Test results using these statistical models are expressed in terms of network model coverage. Testing to a comprehensive statistical model suggests how communications devices may perform over an IP network in terms of network model coverage. This Recommendation focuses on the impact of impairments on layer 3 performance. IP streams from any type of network device can be evaluated using this model.Emphasis is given to the fact that manufacturers of communications equipment and service providers are interested in a specification that accurately models the IP network characteristics that determine performance. Evaluators desire a definitive set of simple tests that properly measure the performance of communications devices from various manufacturers. Therefore, the objective of this Recommendation is to define a technology-independent model that is representative of the IP network, that can be simulated at reasonable complexity, and that facilitates practical evaluation times.