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[HR] V-UPF: preserve PSC on N2 indirect (Access->Access) without QER (#2194)

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Home-Routed roaming: during Xn/N2 handover the source gNB may forward
remaining DL data to the core using UL PDU Session Information (PSC).
On the V-UPF the PSC was lost on the indirect path because OHR+OHC
removed the incoming GTP-U header (and its extensions) and we did not
recreate PSC when no QER/QFI was provisioned by the V-SMF.

This change makes the V-UPF rebuild a DL PSC for the target gNB even
when QER is absent, limited to the Access->Access indirect path
(source gNB -> V-UPF -> target gNB).

Why this is needed in HR:
- In HR deployments the V-SMF typically does not provision QER/QFI for
  the temporary indirect path. Without recreating PSC from recvhdr, the
  extension header disappears after OHR+OHC and the target gNB cannot
  see the QFI during handover buffering/forwarding.
This commit is contained in:
Sukchan Lee 2025-08-15 11:03:54 +09:00
parent 0c56903c98
commit fb3cba40e5
3 changed files with 50 additions and 1 deletions
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docs/_posts/2025-07-19-release-v2.7.6.md
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@ -1,6 +1,6 @@
---
title: "v2.7.6 - Bug fixed"
date: 2025-03-30 22:05:00 +0900
date: 2025-07-19 22:05:00 +0900
categories:
- Release
tags: