From d858bd07998d799525889d93eff7fc7b9c0d38ec Mon Sep 17 00:00:00 2001
From: Louis Royer <infos.louis.royer@gmail.com>
Date: Thu, 12 Dec 2024 15:46:52 +0100
Subject: [PATCH] Update PDU Session estab. with SRCtrl/SRGW/Anchor; close #84

---
 doc/nextmn-lite.md | 17 +++++++++++------
 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/doc/nextmn-lite.md b/doc/nextmn-lite.md
index 67fc78f..be826c7 100644
--- a/doc/nextmn-lite.md
+++ b/doc/nextmn-lite.md
@@ -9,11 +9,13 @@ actor User
 participant UE
 participant gNB
 participant CP
-participant UPF
+participant SRv6Ctrl
+participant SRGW
+participant Anchor
 rect LightBlue
     note over CP,UPF: PFCP Association
-    CP->>+UPF: PFCP Association Setup Request
-    UPF->>+CP: PFCP Association Setup Response
+    CP->>+SRv6Ctrl: PFCP Association Setup Request
+    SRv6Ctrl->>+CP: PFCP Association Setup Response
 end
 rect Orange
     User->>+UE: POST cli/radio/peer(gNBControl)
@@ -32,12 +34,15 @@ rect LightGreen
     note over UE,UPF: PDU Session Establishment
     UE->>+gNB: PDU Session Estab. Req.(UEControl)
     gNB->>+CP: PDU Session Estab. Req.(UEControl, gNBControl)
-    CP->>+UPF: PFCP Session Establishment Request(uplinkPDR, uplinkFAR)
-    UPF->>+CP: PFCP Session Establishment Response
+    CP->>+SRv6Ctrl: PFCP Session Establishment Request(uplinkPDR, uplinkFAR)
+    note over CP,SRv6Ctrl: uplink rule cannot be created yet, we still miss the gNB Ip Addr to know the Area
+    SRv6Ctrl->>+CP: PFCP Session Establishment Response
     CP->>+gNB: N2 PDU Session Req.(ulFTEID, UEIpAddr)
     gNB->>+UE: PDU Session Estab. Accept
     gNB->>+CP: N2 PDU Session Resp.(dlFTEID)
-    CP->>+UPF: PFCP Session Modification Request(downlinkPDR, downlinkFAR)
+    CP->>+SRv6Ctrl: PFCP Session Modification Request(downlinkPDR, downlinkFAR)
+    CP->>+Anchor: create rule(match <UE>, path <SRGW,gNB+TEID>)
+    CP->>+SRGW: create rule(match <UE (UplinkTEID), gNB (Area), Service>, path<Anchor>)
     UPF->>+CP: PFCP Session Modification Response
 end
 UE<<-->>+UPF: PDUs