feat: document for setting charging

docs/guide/Charging/setting.md

@@ -0,0 +1,197 @@
+# Setup Charing for UE
+
+In this demo, we will practice:
+
+- Set Slice-level and Flow-level **Offline charging** in webconsole.
+- Set Slice-level and Flow-level **Offline charging** in webconsole.
+- Test with UERANSIM 
+
+
+
+> Notice:
+> The charging function was released in *free5GC v3.4.1*.
+
+
+
+# 0. Preface
+
+- *free5GC* provides Converge Charging, which includes **Online** and **Offline**.  
+- Support Slice-level and Flow-level Charging.
+- **Offline**
+    - **After network resource usage**, charging information is transmitted from the network to the Billing Domain (BD).
+- **Online**
+    - **Before network resource usage**, the network sends an authentication request to the Online Charging System (OCS) and gets **quota**.
+
+
+
+## 1. Create Subscriber
+
+- The basic setting for subscribers will be ignored in this article; you can refer to [this](./../Webconsole/Create-Subscriber-via-webconsole.md) if you needed. 
+
+- The default would create two slices, *01010203* and *01112233*.
+
+    ### 01010203
+
+    ![010203_slice](./images/slice_level_010203.png)
+
+    - We could change the charging Method from Offline to Online if you needed. 
+
+        ![drop_menu](./images/drop_down_menu.png)
+
+    - We keep using **Offline** for now.
+
+    - By default, there would be one flow rule to *1.1.1.1/32*.
+
+        ![flow_010203](./images/flow_010203.png)
+
+    - Remember to use the same Charing Method as slice-level charing. 
+
+    - For now, we will keep it **Offline**. 
+
+    ### 01112233
+
+    ![slice_level_112233](./images/slice_level_112233.png)
+
+    - We use **Online** Charging for this slice.
+
+    - Create flow rules.
+
+        - Remember to use the same charging method as Slice-level.
+
+        ![flow_112233](./images/flow_112233.png)
+
+- Click Create.
+
+
+
+# 2. Check Charging Data in Webconsole
+
+- Click **UE CHARGING** in webconsole sidebar
+
+    ![sidebar](./images/sidebar.png)
+
+- We would see the Charging Data we set in Step 1. 
+
+    - Expand
+
+    ![charging_data](./images/charging_data_expand.png)
+
+    - Fold
+
+    ![charging_data_fold](./images/charging_data_fold.png)
+
+​    
+
+​		
+
+# 3. Test with UERANSIM 
+
+- Refer to [this](./../5-install-ueransim.md) to set up your environment.
+
+- Provide `free5gc-ue.yaml` I use for your reference.
+
+    ```yaml
+    # IMSI number of the UE. IMSI = [MCC|MNC|MSISDN] (In total 15 digits)
+    supi: 'imsi-208930000000001'
+    # Mobile Country Code value of HPLMN
+    mcc: '208'
+    # Mobile Network Code value of HPLMN (2 or 3 digits)
+    mnc: '93'
+    # SUCI Protection Scheme : 0 for Null-scheme, 1 for Profile A and 2 for Profile B
+    protectionScheme: 0
+    # Home Network Public Key for protecting with SUCI Profile A
+    homeNetworkPublicKey: '5a8d38864820197c3394b92613b20b91633cbd897119273bf8e4a6f4eec0a650'
+    # Home Network Public Key ID for protecting with SUCI Profile A
+    homeNetworkPublicKeyId: 1
+    # Routing Indicator
+    routingIndicator: '0000'
+
+    # Permanent subscription key
+    key: '8baf473f2f8fd09487cccbd7097c6862'
+    # Operator code (OP or OPC) of the UE
+    op: '8e27b6af0e692e750f32667a3b14605d'
+    # This value specifies the OP type and it can be either 'OP' or 'OPC'
+    opType: 'OPC'
+    # Authentication Management Field (AMF) value
+    amf: '8000'
+    # IMEI number of the device. It is used if no SUPI is provided
+    imei: '356938035643803'
+    # IMEISV number of the device. It is used if no SUPI and IMEI is provided
+    imeiSv: '4370816125816151'
+
+    # List of gNB IP addresses for Radio Link Simulation
+    gnbSearchList:
+      - 127.0.0.1
+
+    # UAC Access Identities Configuration
+    uacAic:
+      mps: false
+      mcs: false
+
+    # UAC Access Control Class
+    uacAcc:
+      normalClass: 0
+      class11: false
+      class12: false
+      class13: false
+      class14: false
+      class15: false
+
+    # Initial PDU sessions to be established
+    sessions:
+      - type: 'IPv4'
+        apn: 'internet'
+        slice:
+          sst: 0x01
+          sd: 0x010203
+      - type: 'IPv4'
+        apn: 'internet'
+        slice:
+          sst: 0x01
+          sd: 0x112233
+
+    # Configured NSSAI for this UE by HPLMN
+    configured-nssai:
+      - sst: 0x01
+        sd: 0x010203
+      - sst: 0x01
+        sd: 0x112233
+
+    # Default Configured NSSAI for this UE
+    default-nssai:
+      - sst: 1
+        sd: 1
+
+    # Supported integrity algorithms by this UE
+    integrity:
+      IA1: true
+      IA2: true
+      IA3: true
+
+    # Supported encryption algorithms by this UE
+    ciphering:
+      EA0: true
+      EA1: true
+      EA2: true
+      EA3: true
+
+    # Integrity protection maximum data rate for user plane
+    integrityMaxRate:
+      uplink: 'full'
+      downlink: 'full'
+    ```
+
+- If you set it up successfully, you will see the UERANSIM create two tunnels, `uesimtun0`, and `uesimtun1`.
+
+- The following is a Demo GIF for Charing
+
+    ![demo](./images/demo.gif)
+
+- You can try it out for the **Charing Functionality** now!
+
+
+
+## Appendix
+
+- [CHF Design Document](./../Chf/design.md)
+- [CHarging Function(CHF) Overview](./../../blog/20230913/20230913.md)

docs/guide/index.md

@@ -37,6 +37,7 @@ For people who are not familiar with virtual machines and Linux installation, he
 - [Installing a UE/RAN Simulator](./5-install-ueransim.md)
 - [Installing a N3IWUE](./n3iwue-installation.md)
 - [Enable OAuth2 on SBI](./OAuth2/oauth2_enable.md)
+- [Charging](./Charging/setting.md)
 - [free5GC Simple Apps](./6-simple-app.md)
 - All of tutorial videos are available at our Youtube channel:
     - [English](https://www.youtube.com/watch?v=R-9vH_6VJ2Q&list=PLeDUIabcS2_rQd3yVJrBAYb-MbcqNgjC9)