OpenAirInterface-CN: Install

Download and patch EPC Clone OAI EPC:

# maybe go back to home directory (leave openairinterface5g directory)
git clone https://gitlab.eurecom.fr/oai/openair-cn.git
cd openair-cn
git checkout develop

We tested with commit: 724542d0b59797b010af8c5df15af7f669c1e838

The Eurecom gitlab require now a login, if you don’t have one, a copy of the git repository is in:openair-cn extract the tar with

tar xf openair-cn.tgz
cd openair-cn
git checkout develop

This is the last commit for OAI EPC on this development tree. Active OpenAir EPC is now another project on github. We use here this legacy EPC because the installation is quite easy (the new project uses Cassandra, al LOT of virtual machines, OpenVswitch and complex dependancies).

Apply the patch:

git apply ~/opencells-mods/EPC.patch

The new version of the source files are also in the tar, if you want to merge with another version of OpenAir EPC

What is in the patch file:

Add Ubuntu 18.04 for compilation and fix some bugs Remove link between Linux host name and LTE diameter protocol configuration Add usage of the input address for the SGW input socket modify the freediameter S6a interface to fix a wrong OAI parameter No kernel module patch is required: generic Ubuntu kernel 18.04 works fine with OAI separate ASN.1 compiler installation to be compatible with other OpenAir components on the same machine (ans1c version is different for eNB and gNB) Install third party SW for EPC

cd openair-cn; source oaienv; cd scripts
./build_hss -i

Answer yes to install: freeDiameter 1.2.0 phpmyadmin: We don’t use phpmyadmin later in this procedure to update the MySQL database We removed the installation of phpmyadmin (of course you can use it if you prefer) For ubuntu 18.04, we set back the legacy mysql security level

sudo mysql -u root << END
USE mysql;
UPDATE user SET plugin='mysql_native_password' WHERE User='root';
FLUSH PRIVILEGES;
END

sudo systemctl restart mysql.service
sudo mysql_secure_installation

The last command will ask a few questions:

password: set your password (linux is set in our default config files) VALIDATE PASSWORD PLUGIN: no Remove anonymous users: yes Disallow root login remotely: yes Remove test database and access to it: yes Reload privilege tables now: yes Install 3PP SW for mme and spgw

./build_mme -i

Do you want to install freeDiameter 1.2.0: no Do you want to install asn1c rev 1516 patched? <y/N>: yes Do you want to install libgtpnl ? <y/N>: yes wireshark permissions: as you prefer

./build_spgw -i

Do you want to install libgtpnl ? <y/N>: no Compile the EPC nodes No difficulty found in this phase.

cd openair-cn; source oaienv; cd scripts
./build_hss
./build_mme
./build_spgw

If you face compilation issues, the log files are in openair-cn/build/log

In there files, look for “error:” string.