Research IV: Lightweight 5G Core (5G RedCap)

Background Knowledge:

• Specification

  • 3GPP Specification 23.501
  • RedCap 3GPP Specification 21.917

• API

  • In 5GC, the connection between each Network Function using OpenAPI is called SBI(Service Based Interface, below is the source code from Free5GC.
  • Here is a test note about API sever and client.
  • You can also find some information about what is API by searching.

• Testing environment

  • Free5GC is an open source 5G core network written in go language, which is convenient for E2E test without expensive hardware, you only need a computer or VM.

  • Below is the notes of installing process,it included some solutions of bugs, if the process is not detailed enough, you can click the reference in it. NOTE

  • The note also include the below tools debugging process.

    • Wireshark is a packet catching tool, we will use it to see the packet content between two testing device.

    • MobaXterm is a ssh terminal tool, we can use it to connect to server where VM is running on.

    • VScode is a code editor with ssh function, we can use it to modify the code remotely, you can also use other similar platform like Gateway (From Jetbrains), Goland (From Jetbrains), Sublime text.

Milestone:

• Modify the packet parameters with “Authentication request”
• Remove “AUSF” & E2E test
• Remove “NSSF” & E2E test
• Remove “PCF” & E2E test
• Remove “UDR” & E2E test
• Remove “UDM” & E2E test
• Others
  • SPEC study and a simlfied version
  • 5GC call flow study & OpenAPI connection study