l2-nfapi-simulator/l2-nfapi-simulator-w-S1-same-machine.md

@@ -15,6 +15,8 @@
 ## Table of Contents ##
 
 1.   [Environment](#1-environment)
+2.   [Prepare the EPC](#2-prepare-the-epc)
+3.   [Retrieve the OAI eNB-UE source code](#3-retrieve-the-oai-enb-ue-source-code)
 
 # 1. Environment #
 
@@ -25,7 +27,26 @@
 
 Example of L2 nFAPI Simulator testing environment:
 
-<img src="l2-nfapi-simulator/L2-sim-single-server-deployment.png" alt="" border=3>
+<img src="../l2-nfapi-simulator/L2-sim-single-server-deployment.png" alt="" border=3>
 
 Note that the IP addresses are indicative and need to be adapted to your environment.
 
+# 2. Prepare the EPC #
+
+Create the environment for the EPC and register all **USIM** information into the **HSS** database.
+
+If you are using OAI-EPC ([see on GitHub](https://github.com/OPENAIRINTERFACE/openair-cn)), build **HSS/MME/SPGW** and create config files.
+
+# 3. Retrieve the OAI eNB-UE source code #
+
+The eNB and the UE executables will compiled into 2 separate folders on the same machine `B`.
+
+```bash
+$ ssh sudousername@machineA
+$ git clone https://gitlab.eurecom.fr/oai/openairinterface5g/ enb_folder
+$ cd enb_folder
+$ git checkout -f v1.0.0
+$ cd ..
+$ cp -Rf enb_folder ue_folder
+```
+