All in one OpenAirInterface

本文几乎照搬 all in one openairinterface

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  • all in one openairinterface

安装环境

Name	Version
Ubuntu	18.04.4(all packages upgraded)
UHD	3.15.0.HEAD-0-gaea0e2de
openair-cn	commit 724542d0b59797b010af8c5df15af7f669c1e838
openairinterface	commit edb74831dabf79686eb5a92fbf8fc06e6b267d35

准备工作

1. Add the OAI repository as authorized remote system

添加OAI库作为授权的远端系统

echo -n | openssl s_client -showcerts -connect gitlab.eurecom.fr:443 2>/dev/null | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' | sudo tee -a /etc/ssl/certs/ca-certificates.crt

2. Install USRP drivers

参考链接–安装USRP驱动(UHD)

3. Download author’s modifications

下载原作者Laurent的补丁

cd ~
wget https://open-cells.com/opencells-mods-20190923.tgz
tar xf opencells-mods-20190923.tgz

4. Download and patch 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

当时的develop分支commit:724542d0b59797b010af8c5df15af7f669c1e838

克隆上面代码现在需要帐号了，如果你没用的话，可以考虑下载作者上传的压缩包
openair-cn

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

Apply the patch(打上作者提供的补丁):

git apply ~/opencells-mods/EPC.patch

Install third party SW for EPC

安装第三方依赖

HSS

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

# 如果你有密码就用下面注释掉的那一句
sudo mysql -u root << END
#sudo mysql -u root -pYOURPASSWORD << 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

MME

./build_mme -i

• Do you want to install freeDiameter 1.2.0: no
• Do you want to install asn1c rev 1516 patched? : yes
• Do you want to install libgtpnl ? : yes
• wireshark permissions: as you prefer

SPGW

./build_spgw -i

• Do you want to install libgtpnl? : no

Complie the EPC nodes

cd openair-cn 
source oaienv
cd scripts

./build_hss
./build_mme
./build_spgw

如果你遇到任何编译的问题，日志文件在 openair-cn/build/log下，在这个文件里找
error:的字符串

Download & Complie the eNB on 18.04

git clone https://gitlab.eurecom.fr/oai/openairinterface5g.git
cd openairinterface5g
git checkout edb74831da

source oaienv  
./cmake_targets/build_oai -I  # install SW packages from internet
./cmake_targets/build_oai -w USRP --eNB --UE # compile eNB and UE

eNB Building Problems

• ./build_oai -w USRP 找不到uhd库
  
  具体的原因应该是你安装uhd库时没有安装到默认的目录(/usr/local), 比如我安装
  多个版本的uhd库时, 就会安装到(/usr/local/opt/uhd_x_x_x)目录下, 其中
  uhd_x_x_x的x指的是uhd的版本号. 多个版本可以创建软连接来管理.

  解决办法是在/path/to/cmake_targets/CMakeLists.txt文件里添加uhd的头文件和
  库文件搜索目录, 如下图所示.
  

Install author’s configuration for EPC

sudo mkdir -p /usr/local/etc/oai
sudo cp -rp ~/opencells-mods/config_epc/* /usr/local/etc/oai

cd openair-cn; source oaienv; cd scripts
./check_hss_s6a_certificate /usr/local/etc/oai/freeDiameter hss.OpenAir5G.Alliance
./check_mme_s6a_certificate /usr/local/etc/oai/freeDiameter mme.OpenAir5G.Alliance

1. spgw.conf
   Only the SGi output to internet need to be configured.
   In /usr/local/etc/oai/spgw.conf,
   your should set the Ethernet interface that is connected to Internet, and,
   to tell to the PGW to implement NAPT for the UE traffic

   PGW_INTERFACE_NAME_FOR_SGI = "enp3s0";
   PGW_MASQUERADE_SGI = "yes";
   

2. SIM MCC/MNC should be duplicated in a couple of file

   • eNB

      ////////// MME parameters:
     mme_ip_address = ( { ipv4 = "127.0.0.20";
     ipv6 = "192:168:30::17";
     active = "yes";
     preference = "ipv4";
     }
     );
     
      NETWORK_INTERFACES :
     {
     ENB_INTERFACE_NAME_FOR_S1_MME = "lo";
     ENB_IPV4_ADDRESS_FOR_S1_MME = "127.0.0.10/8";
     
     ENB_INTERFACE_NAME_FOR_S1U = "lo";
     ENB_IPV4_ADDRESS_FOR_S1U = "127.0.0.10/8";
     ENB_PORT_FOR_S1U = 2152; # Spec 2152
     };
     

   • MME file: /usr/local/etc/oai/mme.conf to update

     GUMMEI_LIST = ( MCC="208" ; MNC="92"; MME_GID="4" ; MME_CODE="1"; } );
     TAI_LIST = ({MCC="208" ; MNC="92"; TAC = "1"; } );
     

   • HSS file: /usr/local/etc/oai/hss.conf to update
     设置mysql的账号和密码以及数据库的名字，然后用phpmyadmin网页修改。

3. eNB(x300) ( _ Update Date: 2020.07.27 Monday_)
   oai enb x300 additional config
   添加下面内容在enb.band*.***配置文件的RUs = (模块里\

   sdr_addrs = "type=x300,addr=192.168.10.2";
   

   The final RUs section should be edited as shown below.

   RUs = (
       {
          local_rf       = "yes"
          nb_tx          = 1
          nb_rx          = 1
          att_tx         = 5
          att_rx         = 0;
          bands          = [7];
          max_pdschReferenceSignalPower = -27;
          max_rxgain                    = 117;
          eNB_instances  = [0];
          sdr_addrs      = "type=x300,addr=192.168.40.2";
       }
   );
   

Final test and verification

打开四个终端窗口

In each window

cd openair-cn; source oaienv; cd scripts; ./run_hss

cd openair-cn; source oaienv; cd scripts; ./run_mme

cd openair-cn; source oaienv; cd scripts; sudo -E ./run_spgw

sudo bash
cd ~/openairinterface5g; source oaienv
cd cmake_targets/lte_build_oai/build
sudo ./lte-softmodem -O ~/opencells-mods/enb.10MHz.b200

Running Problems

1. 我在运行mme时遇到了如下图所示的问题，提示的是找不到freeDiameter动态库。
   
   解决办法是从源码安装freeDiameter，不用脚本安装。

   GIT_SSL_NO_VERIFY=true git clone https://gitlab.eurecom.fr/oai/freediameter.git -b \ 
   eurecom-1.2.0
   cd freediameter
   git apply ~/opencells-mods/freediameter1.2.0.postOAI.patch
   mkdir build
   cd build
   cmake -DCMAKE_INSTALL_PREFIX:PATH=/usr/local ../
   make -j4
   sudo make install
   

• 目前手机可以连上，但是一是没有网络连接，二是mme运行会突然中断，应该是配置文件的
  问题，后面继续调试。