Open5GS 核心网搭建

1.依赖安装

需要 Ubuntu 24.04 LTS

如果在ARM64的机器上安装，且无LSE扩展，请选择1.2的安装方式

其他机器1.1和1.2选择一种安装即可

1.1 MongoDB

sudo apt update
sudo apt install gnupg
curl -fsSL https://pgp.mongodb.com/server-8.0.asc | sudo gpg -o /usr/share/keyrings/mongodb-server-8.0.gpg --dearmor

添加仓库文件

在 Ubuntu 22.04 (Jammy) 上

echo "deb [ arch=amd64,arm64 signed-by=/usr/share/keyrings/mongodb-server-8.0.gpg] https://repo.mongodb.org/apt/ubuntu jammy/mongodb-org/8.0 multiverse" | sudo tee /etc/apt/sources.list.d/mongodb-org-8.0.list

安装 MongoDB

sudo apt update
sudo apt install -y mongodb-org
sudo systemctl start mongod (if '/usr/bin/mongod' is not running)
sudo systemctl enable mongod (ensure to automatically start it on system boot)

1.2 FerretDB + PostgreSQL

参考：

https://docs.ferretdb.io/installation/ferretdb/docker/

https://github.com/open5gs/open5gs/issues/1362

创建一个 docker-compose.yml 文件 内容如下

services:
  postgres:
    image: ghcr.io/ferretdb/postgres-documentdb:17-0.107.0-ferretdb-2.7.0
    restart: unless-stopped
    environment:
      - POSTGRES_USER=username
      - POSTGRES_PASSWORD=password
      - POSTGRES_DB=postgres
    volumes:
      - ./data:/var/lib/postgresql/data

  ferretdb:
    image: ghcr.io/ferretdb/ferretdb:2.7.0
    restart: unless-stopped
    ports:
      - 27017:27017
    environment:
      - FERRETDB_POSTGRESQL_URL=postgres://username:password@postgres:5432/postgres
      - FERRETDB_AUTH=false

networks:
  default:
    name: ferretdb

docker compose down
docker compose up -d

2.Open5GS 安装

sudo add-apt-repository ppa:open5gs/latest
sudo apt update
sudo apt install open5gs

安装WebUI （前置nodejs）
 # Download and import the Nodesource GPG key
sudo apt update
sudo apt install -y ca-certificates curl gnupg
sudo mkdir -p /etc/apt/keyrings
curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key | sudo gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg

 # Create deb repository
NODE_MAJOR=20
echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_$NODE_MAJOR.x nodistro main" | sudo tee /etc/apt/sources.list.d/nodesource.list

 # Run Update and Install
sudo apt update
sudo apt install nodejs -y

curl -fsSL https://open5gs.org/open5gs/assets/webui/install | sudo -E bash -

3.配置 Open5GS

下面按需配置即可

3.1. 4G/5G NSA

修改 /etc/open5gs/mme.yaml 设置 S1AP IP 地址、PLMN ID（设置为001 01） 和 TAC

一般修改为自己的本地内网IP地址

$ diff --git a/configs/open5gs/mme.yaml.in b/configs/open5gs/mme.yaml.in
index db2cdaef1..2010f6691 100644
--- a/configs/open5gs/mme.yaml.in
+++ b/configs/open5gs/mme.yaml.in
@@ -10,7 +10,7 @@ mme:
     freeDiameter: @sysconfdir@/freeDiameter/mme.conf
     s1ap:
       server:
-        - address: 127.0.0.2
+        - address: 10.10.0.2
     gtpc:
       server:
         - address: 127.0.0.2
@@ -25,14 +25,14 @@ mme:
           port: 9090
     gummei:
       plmn_id:
-        mcc: 999
-        mnc: 70
+        mcc: 001
+        mnc: 01
       mme_gid: 2
       mme_code: 1
     tai:
       plmn_id:
-        mcc: 999
-        mnc: 70
+        mcc: 001
+        mnc: 01
       tac: 1
     security:
         integrity_order : [ EIA2, EIA1, EIA0 ]

修改 /etc/open5gs/sgwu.yaml 文件以设置 GTP-U IP 地址

也是修改为自己的本地内网IP地址

$ diff --git a/configs/open5gs/sgwu.yaml.in b/configs/open5gs/sgwu.yaml.in
index 7266e47fb..d640f0357 100644
--- a/configs/open5gs/sgwu.yaml.in
+++ b/configs/open5gs/sgwu.yaml.in
@@ -15,7 +15,7 @@ sgwu:
 #          - address: 127.0.0.3
     gtpu:
       server:
-        - address: 127.0.0.6
+        - address: 10.11.0.6

 ################################################################################
 # PFCP Server

然后重启服务 上面的两个IP地址是可以重复的 不需要额外的网卡

sudo systemctl restart open5gs-mmed
sudo systemctl restart open5gs-sgwud

3.2. 5G SA

修改 AMF 的 NGAP 绑定地址和UPF 的 GTPU 绑定地址，如果这个SDR基站就在本地就不需要改了

这个绑定地址需要与上面4G的区别 需要额外网卡

$ diff --git a/configs/open5gs/nrf.yaml.in b/configs/open5gs/nrf.yaml.in
index cd9e45feb..58e8cbbce 100644
--- a/configs/open5gs/nrf.yaml.in
+++ b/configs/open5gs/nrf.yaml.in
@@ -10,8 +10,8 @@ global:
 nrf:
   serving:  # 5G roaming requires PLMN in NRF
     - plmn_id:
-        mcc: 999
-        mnc: 70
+        mcc: 001
+        mnc: 01
   sbi:
     server:
       - address: 127.0.0.10

修改/etc/open5gs/amf.yaml以设置 NGAP IP 地址、PLMN ID、TAC 和 NSSAI。

$ diff --git a/configs/open5gs/amf.yaml.in b/configs/open5gs/amf.yaml.in
index 938917e32..35d0ab5aa 100644
--- a/configs/open5gs/amf.yaml.in
+++ b/configs/open5gs/amf.yaml.in
@@ -18,27 +18,27 @@ amf:
           - uri: http://127.0.0.200:7777
     ngap:
       server:
-        - address: 127.0.0.5
+        - address: 10.10.0.5
     metrics:
       server:
         - address: 127.0.0.5
           port: 9090
     guami:
       - plmn_id:
-          mcc: 999
-          mnc: 70
+          mcc: 001
+          mnc: 01
         amf_id:
           region: 2
           set: 1
     tai:
       - plmn_id:
-          mcc: 999
-          mnc: 70
+          mcc: 001
+          mnc: 01
         tac: 1
     plmn_support:
       - plmn_id:
-          mcc: 999
-          mnc: 70
+          mcc: 001
+          mnc: 01
         s_nssai:
           - sst: 1
     security:

修改 /etc/open5gs/upf.yaml 以设置 GTP-U 地址。

$ diff --git a/configs/open5gs/upf.yaml.in b/configs/open5gs/upf.yaml.in
index e78b018f1..35a54419e 100644
--- a/configs/open5gs/upf.yaml.in
+++ b/configs/open5gs/upf.yaml.in
@@ -15,7 +15,7 @@ upf:
 #          - address: 127.0.0.4
     gtpu:
       server:
-        - address: 127.0.0.7
+        - address: 10.11.0.7
     session:
       - subnet: 10.45.0.1/16
       - subnet: 2001:db8:cafe::1/48

更改配置文件后，请重启 Open5GS 进程

sudo systemctl restart open5gs-nrfd
sudo systemctl restart open5gs-amfd
sudo systemctl restart open5gs-upfd

1. 网络转发

   Enable IPv4/IPv6 Forwarding

   sudo sysctl -w net.ipv4.ip_forward=1
   sudo sysctl -w net.ipv6.conf.all.forwarding=1

   Add NAT Rule

   sudo iptables -t nat -A POSTROUTING -s 10.45.0.0/16 ! -o ogstun -j MASQUERADE
   sudo ip6tables -t nat -A POSTROUTING -s 2001:db8:cafe::/48 ! -o ogstun -j MASQUERADE

   sudo iptables -I FORWARD -i ogstun -j ACCEPT
   sudo iptables -I FORWARD -o ogstun -j ACCEPT

   sudo ip6tables -I FORWARD -i ogstun -j ACCEPT
   sudo ip6tables -I FORWARD -o ogstun -j ACCEPT

---

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