# **OAI**
###### tags: `Master` `OAI`

## Installation
### System requirements (Hardware compatibility)
- 2 PC(eNB and EPC)
- USRP B210(給eNB使用發射訊號)
- Sim card(可直接用在手機當UE，也可以插在Dongle用在筆電上)

### Kernel Setups - Main Installation (Software compatibility)
- **Kernel and Ubuntu Version**
- eNB: low-latency kernel 3.19 on top of Ubuntu 14.04, 64-bit architecture type
- EPC: 4.7.x kernel from source with GTP module

sudo apt-get install xz-utils build-essential wget libncurses5-dev libssl-dev
sudo apt-get build-dep linux-image-$(uname -r) ncurses-bin 
wget https://cdn.kernel.org/pub/linux/kernel/v4.x/linux-4.7.1.tar.xz
unxz linux-4.7.1.tar.xz
tar -xovf linux-4.7.1.tar
cd linux-4.7.1
make menuconfig
make -j`nproc`
sudo make modules_install
sudo make install

- **Power management for eNB**
==Remove all power management features in the BIOS (sleep states, in particular C-states) and CPU frequency scaling (Intel SpeedStep)==
watch grep \"cpu MHz\" /proc/cpuinfo
`In    /etc/default/grub:`
**Add**    GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_pstate=disable"
"processor.max_cstate=1 intel_idle.max_cstate=0 idle=poll"
`update-grub`
**In**    /etc/modprobe.d/blacklist.conf
**Blacklist**   intel_powerclamp
**Disable** hyperthreading, CPU frequency control in BIOS

- **Install i7z to check CPU**

sudo apt-get install i7z
sudo i7z

==C0 will be 100% and other state would be 0%==


- **Disable CPU Frequency scaling**

sudo apt-get install cpufrequtils
sudo vi /etc/default/cpufrequtils

**Add** GOVERNOR="performance"

sudo update-rc.d ondemand disable
sudo /etc/init.d/cpufrequtils restart

**Check** with cpufreq-info

## Set MySQL
==連線到140.114.77.76/phpmyadmin
user name:****
pwd:******==

### Table <User>
1. 點擊上方Structure，將key, rand, opc的類型從varbinary改為binary
2. imsi: ==sim卡上的imsi值==
3. ms_ps_status: NOT_PURGED
4. rau_tau_timer: 120
5. mmeidentity_idmmeidentity: 46
==這個值要看mmeidentity的數字==
6. key: ==sim卡上的key值==
7. OPc: ==sim卡上的opc值==

### Table <mmeidentity>
新增一筆
1. idmmeidentity: 46
2. mmehost: ==用cat /etc/hosts看==
3. mmerealm: domain name (ex:wmlab)
4. UE-Reachability: 0

### Table <pdn>
1. apn: oai.ipv4
設定這個apn gw的服務
2. pgw_id: ==看pgw table的值==
3. users_imsi: ==sim卡上的imsi值==

### Table <pgw>
新增一筆
1. id: ==新增時會自己設置==
2. ipv4: ==輸入ip addr== (ex:140.114.77.76)

## Configuration
==Configuration 請參照Reference2==
Next, we explain the setup for running eNB and EPC+HSS on two different hosts. Assume the IP addresses of eNB and EPC+HSS are **192.168.12.82** and **192.168.12.62** respectively. We also assume that the interface with which they are connected together is ethernet (eth0)

- Configure eNB machine
mme_ip_address is network interface's IP address of your EPC/HSS, and NETWORK_INTERFACE is your eNB related network interface information

- Configure EPC machine
Copy EPC config files in /usr/local/etc/oai

sudo mkdir -p /usr/local/etc/oai/freeDiameter
sudo cp ~/openair-cn/ETC/mme.conf /usr/local/etc/oai
sudo cp ~/openair-cn/ETC/hss.conf /usr/local/etc/oai
sudo cp ~/openair-cn/ETC/spgw.conf /usr/local/etc/oai
sudo cp ~/openair-cn/ETC/acl.conf /usr/local/etc/oai/freeDiameter
sudo cp ~/openair-cn/ETC/mme_fd.conf /usr/local/etc/oai/freeDiameter
sudo cp ~/openair-cn/ETC/hss_fd.conf /usr/local/etc/oai/freeDiameter




## Running
### Install certificates(not required)

cd ~/openair-cn/scripts
./check_hss_s6a_certificate /usr/local/etc/oai/freeDiameter/ hss.wmnet
./check_mme_s6a_certificate /usr/local/etc/oai/freeDiameter/ mme.wmnet

### Compile & Run HSS (Always Run HSS First)

cd ~/openair-cn/scripts
./build_hss -c

==!! now  don't run below one !!!
Run only once to install database==

** Be careful of running this *****
./run_hss -i ~/openair-cn/SRC/OAI_HSS/db/oai_db.sql           

#Run this for all subsequent runs

./run_hss           

### Compile & MME

cd ~/openair-cn/scripts
./build_mme -c
./run_mme

### Compile & SP-GW

cd ~/openair-cn/scripts
./build_spgw -c
./run_spgw

### Compile & Run eNB

cd ~/openairinterface5g
source oaienv
./cmake_targets/build_oai -w USRP -x -c --eNB
cd cmake_targets/lte_build_oai/build
sudo -E ./lte-softmodem -O ~/openairinterface5g/targets/PROJECTS/GENERIC-LTE-EPC/CONF/enb.band7.tm1.usrpb210.conf (-d)
sudo -E ./lte-softmodem -h #(to see help options)

接著, 電腦插上sim卡
試試看有沒有網路

## Reference
1. [https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/OpenAirSoftwareSupport](https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/OpenAirSoftwareSupport)
2. [https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/HowToConnectCOTSUEwithOAIeNBNew](https://gitlab.eurecom.fr/oai/openairinterface5g/wikis/HowToConnectCOTSUEwithOAIeNBNew)
3. [ https://blog.csdn.net/wxsdr/article/details/53691763]( https://blog.csdn.net/wxsdr/article/details/53691763)