Sign in Subscribe

nsa 5g call flow

Last updated on 

High-Level Overview of 5G Call Flow:

  1. UE (User Equipment) Initialization:
    • The user equipment (e.g., a smartphone) establishes a connection with the 5G network.
  2. Registration:
    • The UE registers with the 5G core network (5GC). This involves authentication and authorization processes.
  3. Attach Procedure:
    • The UE attaches to the 5G network, and the 5G Core allocates resources for the UE.
  4. Establishment of Radio Connection:
    • The UE establishes a radio connection with the gNB (Next-Gen NodeB), which is part of the 5G radio access network (RAN).
  5. Session Establishment:
    • The UE establishes a data session with the 5G Core. This involves the allocation of a PDU (Packet Data Unit) session and setting up a bearer.
  6. Data Transfer:
    • The UE can now transfer data, whether it's browsing the internet, making a voice call, or using other services.
  7. Handover (Optional):
    • If the UE moves to an area served by a different gNB, a handover may occur to maintain the connection.
  8. Termination:
    • When the UE is finished with the session, it can detach from the 5G network.

NSA (Non-Standalone) Mode:

In NSA 5G, the initial connection relies on the existing 4G LTE infrastructure, and the 5G NR (New Radio) is used as an anchor for data offload. The control plane signaling and mobility management may involve interactions between both the 4G and 5G components.

Note:

For a more in-depth understanding or specific technical details, you would need to refer to the 3GPP specifications or documentation provided by the relevant standards bodies or vendors involved in the 5G network infrastructure. Additionally, due to the sensitivity of such information, specific details about NSA 5G call flows may be restricted or confidential.