From 9fe045f40e9d8ae2b5e33e7aa06ab84562cf0075 Mon Sep 17 00:00:00 2001 From: Guido Casati Date: Mon, 20 Jan 2025 09:59:57 +0100 Subject: [PATCH] Add abnormal conditions section to E1-design.md --- doc/E1AP/E1-design.md | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/doc/E1AP/E1-design.md b/doc/E1AP/E1-design.md index e98c0ac581..8fafd09f66 100644 --- a/doc/E1AP/E1-design.md +++ b/doc/E1AP/E1-design.md @@ -194,3 +194,7 @@ Note that CU-UPs are not released from CU-CP internal structures. That means that you have to restart the CU-CP if you want to connect the CU-UP again (e.g., after a crash). The CU-CP might also misfunction during attach if a CU-UP was connected, but disconnected in the meantime. + +# 5. Abnormal conditions + +* The CU-UP goes offline during normal operation (e.g. UEs have a valid PDU Session and are exchanging data on the UP): after restarting the CU-UP, the UP is not restored and the user will notice GTP errors. In this case the UEs have to reconnect.