5G NR NSA Option 3

1. Option 3 - Non-Standalone (NSA)
Option 3 is the initial phase of 5G deployment, utilizing the existing LTE network as the anchor for control signaling while leveraging 5G NR (New Radio) for enhanced data capabilities. This configuration is known as Dual Connectivity (DC), where the LTE network acts as the control plane anchor, and the 5G NR nodes are used as a secondary pathway for data traffic.
Control Plane: The control plane connection is maintained via the LTE network.
User Plane: The user plane traffic can be split between LTE and 5G NR, allowing the user equipment (UE) to benefit from increased data rates and lower latency provided by 5G, while maintaining connectivity through the LTE network.
2. Option 3a - Non-Standalone (NSA)
Option 3a is similar to Option 3 but differs in the way the user plane data is handled:
Control Plane: As with Option 3, the control plane is anchored in the LTE network.
User Plane: All user plane data is routed through the 5G NR, with LTE only providing the control signaling. This option fully utilizes the data handling capabilities of the 5G NR while still relying on LTE for all control functions.
3. Option 3x - Non-Standalone (NSA)
Option 3x further evolves the use of dual connectivity by splitting the user plane data across both LTE and 5G NR networks:
Control Plane: The control plane remains on the LTE network.
User Plane: The user plane data is dynamically split between LTE and 5G NR based on factors like network load, quality of service requirements, and radio conditions. This option maximizes the efficiency of both LTE and 5G networks to enhance overall performance.
Key Considerations:
Deployment Efficiency: Options 3, 3a, and 3x allow operators to leverage their existing LTE networks, which can expedite 5G rollout and provide immediate enhancements to consumer services without the need for a complete overhaul of existing network infrastructure.
Flexibility and Performance: These options provide flexibility in managing traffic and optimizing network performance based on current infrastructure and technological capability.
Future Transition: Although these deployment options rely on existing LTE infrastructure, they are considered transitional steps toward a fully standalone 5G network that will utilize 5G cores entirely.