Chapter 3 - EPC Installation

EPC installation

Following section shows how to build EPC and HSS on same host. If you are using your own MNC configuration, please check your MNC and MCC are listed in the {openair_dir}/openair-cn/UTILS/mcc_mnc_itu.c. (See trouble shooting)

Environment (FQDN)

You need to configure the FQDN value in /etc/host for S6A Authentication by adding the following entries EX. 127.0.1.1 EPC.HOSTNAME.realm EPC.HOSTNAME

Example
127.0.0.1    localhost
127.0.1.1    cran.oai.nmsl   cran

In this case, our realm is “oai.nmsl “ and hostname is “cran”

Fixed bug in OAI

Notice: Although different version of OAI may modify the codes. Thus, the below line number may be different.

Issue: MNC not matched: configuration for commercial UE (Using Our own SIM)

You need to add mnc manually in the list : Edit /openair-cn/UTILS/mcc_mnc_itu.c

const mcc_mnc_list_t  mcc_mnc_list[]={
{466,”68”}   ###<- add this entry
…..
}

Issue : UE did not send “attach complete” message

Modify ./NAS/MME/EMM/SAP/emm_send.c:186:

In emm_send_attach_accept() function, replace this line
emm_msg->epsattachresult = EPS_ATTACH_RESULT_EPS;
with 
emm_msg->epsattachresult = EPS_ATTACH_RESULT_EPS_IMSI;

Build

Go to your OAI directory

1. Install Additional packages with old script

   cd {openair_dir}/cmake_targets/
   sudo ./build_oai -I --install-system-files --install-optional-packages
   

2. Install kernel module for

   cd {openair_dir}/openair-cn/SCRIPTS
   sudo ./build_epc -j
   

3. Install EPC

   cd {openair_dir}/openair-cn/SCRIPTS
   sudo ./build_epc -c -l
   

   (Add -c while rebuilding)