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Summary:
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Due to difficulties of implementation of NGN networks, relevant complexity of used NGN's equipment, an unlimited set of services and unguaranteed QoS level for different services, ITU-T SG11 has been discussing the concept of a model network since 2006.
The first Recommendation ITU-T Q.3900 (2006) "Methods of testing and model network architecture for NGN technical means testing as applied to public telecommunication networks" became the basic standard for NGN testing.
Afterwards, there was a discussion on the global interoperability concept as the next step of testing methodology for NGN networks. The global interoperability includes technical means interoperability, interoperability of services and interoperability of networks for providing the guaranteed level of QoS. The set of Recommendations, which are based on the model network and global interoperability concepts, was developed during study periods 2005-2008, 2009-2012 in collaboration with experts from Russia, Austria, China, Japan, Korea, Poland(e.g. ITU-T Q.3900, ITU-T Q.3904, ITU-T Q,3906.1, ITU-T Q.3945, etc.).
Particularly, the same concept can be used for IoT testing. Therefore, this Recommendation describes the architecture and facilities of Model Network for IoT testing.
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