Summary

With the advent of network slicing technology for IMT-2020, which is the most typical substantiation of the network softwarization approach, this Recommendation describes the technical aspects of the software-defined networking (SDN) part of network slice support, which assists in handling individual components of a network slice, and contains network infrastructure and its control/management (Recommendation ITU-T Y.3150). This Recommendation addresses the technical aspects of the SDN environment: architectural model, functionalities and interfaces. In particular, the high-level specifications of SDN control interfaces are treated based on a standard of SDN control of transport networks (Recommendation ITU-T G.7702).