New API Proposal - 5G New Calling

[ShenxiuDU]

What type of PR is this?

• New API Proposal

What this PR does / why we need it:

5G New Calling API proposal from Open Gateway Drop 4

Which issue(s) this PR fixes:

Fixes #

Special notes for reviewers:

None

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[ShenxiuDU]

This introduction may be helpful for understanding this API.
At the same time, further clarify as follows. For the workflow of this API, the application server can belong to the operator or an authorised third party. These application servers can call the new calling capabilities in the operator's network through the API. For this API at the current stage, we only take AI translation as an example. In fact, all new calling capabilities can be called by the application server through the API. Furthermore, these new calling capabilities are not limited to being provided only by operators. Other capability vendors can also provide their capabilities, but these capabilities must first be registered in the operator's network through another platform (this platform is not in the scope of this API). In other words, the operator's network can accommodate the new calling capabilities of the operator itself or other capability vendors and expose them to application servers for invocation through the API.
5G NEW CALLING API Introduction.pdf