What is Wireless-Wireline Convergence in 5G?

Do you remember FMC (Fixed-Mobile Convergence) in 4G?

Do you remember ICS (IMS Centralized Service) to cover VoBB and VoLTE?

If your answer is yes, it means that you are interested in WWC (Wireless-Wireline Convergence).

There is complete new architecture in 5G defined by 3GPP and BBF (Broadband Forum) to support WWC and connect different Fixed networks and infrastructures to 5G Core. Then it would be easy in IMS to manage the voice calls and other services.

New and important Network Functions:

  • 5G-RG: 5G Residential Gateway. A 5G-RG is an RG that has been augmented with 5G capabilities such as QoS handling, a NAS stack, and possibly additional capabilities such as multi-access PDU with ATSSS, etc.

  • FN-RG: Fixed Network-Residential Gateway. AN FN-RG is a residential gateway that connects the home LAN to the WAN without making use of 5G NAS. There is no active N1 interface from an FN-RG.

  • AGF: Access Gateway Function. The AGF is a function that connects wireline AN to the 5GC. AGF can support both 5G-RGs (direct mode) and FN-RG(s) (adaptive mode). For the latter, the AGF provides NAS functions among others (N1 interface) for the FN-RGs.

  • BNG: Broadband Network Gateway. A legacy wireline access IP edge.


  1. WWC Architecture by Broadband Forum: https://www.broadband-forum.org/technical/download/TR-470.pdf
  2. WWC BBF/3GPP work overview webinar that our (Nokia) Head of 3GPP SA2 Mr. Laurent Thiébaut will talk interestingly: 5G Wireless – Wireline Convergence Work Overview Webinar - YouTube

LinkedIn: Mohammad Fazel Salimi on LinkedIn: #5g #wwc #3gpp #bbf