Whether a standalone 5G Core can support a 4G RAN?

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1

Hello Experts.

Whether a standalone 5G Core can support a 4G RAN?

Admin note: this post was updated with image below.

Whether a standalone 5G Core can support a 4G RAN
Whether a standalone 5G Core can support a 4G RAN1190×585 73.1 KB

2

Yes if eNB upgrade to support NG inte4face. We can say ng-eNB.

Here PDCP layer upgrade to support SDAP.

3

No.

You need a dedicated Core for 4G.

5G Core nodes are not backwards compatible.

4

NG eNB can connect with 5GC as per option 7.

RAT fallback is a use case for this!

5

Yes and No.

Yes, as per 3gpp options.

But practically, if you are deploying 5GC in parallel existing EPC, why will you still have NSA?

Like opt-7.

And further incur costs to upgrade eNBs.

No and here comes Dual Mode Cores to fill in gap.

6

I am saying that it is possible as per SPECS.

7

I know you can do these combinations, but having a “100% pure” 5G with 4G is not possible.

Whether a standalone 5G Core can support a 4G RAN
Whether a standalone 5G Core can support a 4G RAN1190×585 73.1 KB

8

That means PDCP layer after upgrade will support QoS Flow.