Page 1370 - 5G Basics - Core Network Aspects

3 Signalling aspects

Appendix II

Development methodology of this Supplement

Considering the standardization methodology and conventional study sequence, the signalling model
including the FEs and their mutual interfaces should be based on functional requirements which are derived
from the corresponding use cases or scenarios. Therefore, it is required to develop this Supplement with the
following steps:

Step 1: Signalling scenarios and their derived functional requirements (clause 6);
Step 2: Signalling models with FEs and their mutual interaction, which are based on the functional
requirements derived in Step 1 (clauses 7 and 8);
Step 3: Signalling protocol procedures for typical signalling scenarios (clause 9).
As a new paradigm, SDN mainly focuses on separation of control and forwarding. It consists of a series of
existing and emerging technologies and can be utilized in many different scenarios, such as cloud computing,
data centres, operators' IP carrier network, broadband access network, wireless network, network security,
etc. Each SDN-applied scenario has its dedicated solution and different functional requirements. Therefore,
the FEs and their reference points in a SDN high-level framework have dedicated descriptions and
requirements in different scenarios, respectively.

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