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5g option 7

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The 3rd Generation Partnership Project (3GPP) had specified different options for the deployment of 5G networks. These options are configurations that define how the 5G radio interface and core network should be implemented. Option 7 specifically refers to a non-standalone (NSA) deployment of 5G.

In a non-standalone deployment, 5G is deployed alongside existing 4G LTE networks. The 5G radio access network (RAN) is used to provide enhanced data rates and other benefits, while the core network continues to be primarily based on 4G architecture. Option 7 has been defined as part of the 3GPP Release 15 specifications.

Here's a technical breakdown of 5G Option 7:

  1. Core Network: The core network remains LTE-based (Evolved Packet Core - EPC). This means that the Evolved NodeB (eNB) of LTE is used as the master node, and the 5G New Radio (NR) is deployed as secondary nodes to enhance data rates and capabilities.
  2. Dual Connectivity: In Option 7, a device is connected to both LTE and 5G at the same time. This is achieved through a concept called dual connectivity, where the device simultaneously communicates with LTE eNB and 5G NR.
  3. Control Plane Separation: Control plane functions, which manage signaling and control procedures, are separated between LTE and 5G. This allows for the optimization of control plane signaling and provides flexibility in managing mobility and handovers.
  4. User Plane Separation: Similar to the control plane, user plane functions are separated between LTE and 5G. This enables efficient data transfer, and depending on the specific deployment scenario, user data can be transmitted through either LTE or 5G, or both.
  5. Deployment Scenarios: Option 7 is often used in scenarios where the 5G coverage is limited, and operators want to leverage the existing LTE infrastructure for control and user plane services. It allows for a smooth transition to 5G without requiring a complete overhaul of the existing network.
  6. EN-DC (E-UTRAN New Radio - Dual Connectivity): This is the term used to describe the dual connectivity between LTE and 5G NR in non-standalone deployments. It enables the simultaneous use of LTE and 5G NR radio access technologies.