From 4ba950872b3844c3170466e51f65e21e7bc6da99 Mon Sep 17 00:00:00 2001
From: Angelo Athanassopoulos <angelo.athanassopoulos@hhi.fraunhofer.de>
Date: Tue, 4 Oct 2022 13:03:51 +0200
Subject: [PATCH] DOC - Added instructions for testing SDAP & Multiple DRBs

---
 doc/RUNMODEM.md | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/doc/RUNMODEM.md b/doc/RUNMODEM.md
index 11f8d2caf77..7e899455bac 100644
--- a/doc/RUNMODEM.md
+++ b/doc/RUNMODEM.md
@@ -181,6 +181,17 @@ where `-r` sets the transmission bandwidth configuration in terms of RBs, `-C` s
 
 Additionally, at UE side `--uecap_file` option can be used to pass the UE Capabilities input file (path location + filename), e.g. `--uecap_file ../../../targets/PROJECTS/GENERIC-NR-5GC/CONF/uecap.xml`
 
+### Run OAI with SDAP & Custom DRBs
+
+To run OAI gNB with SDAP, simply include `--gNBs.[0].enable_sdap 1` to the binary's arguments.
+
+The DRB creation is dependent on the 5QI. 
+If the 5QI corresponds to a GBR Flow it assigns a dedicated data radio bearer.
+The Non-GBR flows use a shared data radio bearer.
+
+To hardcode the DRBs for testing purposes, simply add `--gNBs.[0].drbs x` to the binary's arguements, where `x` is the number of DRBs, along with SDAP.
+The hardcoded DRBs will be treated like GBR Flows. Due to code limitations at this point the max. number of DRBs is 4. 
+
 ## IF setup with OAI
 
 OAI is also compatible with Intermediate Frequency (IF) equipment. This allows to use RF front-end that with arbitrary frequencies bands that do not comply with the standardised 3GPP NR bands. 
-- 
GitLab