This module delves into Dual Connectivity (DC), a fundamental technology for achieving higher data rates, improved mobility, and enhanced network reliability by allowing a device to simultaneously communicate with multiple base stations.

We start by defining Dual Connectivity and its evolution. The course then details the critical roles played by the anchor point, the Primary Cell (PCell), and the secondary node's key cell, the Primary Secondary Cell (PSCell), in managing radio resources and connectivity.

A significant focus is placed on the practical application of EN-DC (E-UTRA-NR Dual Connectivity), the most common non-standalone deployment, including its end-to-end workflow. We also explore advanced NR-DC (NR-NR Dual Connectivity) concepts for combining multiple 5G carriers. Finally, the module examines various DC Deployment Scenarios, providing insight into how operators leverage this technology to optimize network performance and user experience.