From the course: 5G Architecture, Design, Protocols, Evolution, and Deployment
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Primary cell (PCell)
From the course: 5G Architecture, Design, Protocols, Evolution, and Deployment
Primary cell (PCell)
(upbeat music) - [Instructor] Let's begin with the fundamentals of dual connectivity, and at the heart of it is the primary cell, PCell. In a dual connectivity architecture, whether it is the EN-DC or it is a NR dual connectivity, the PCell acts as the anchor. It manages the connection, ensure control signaling part, and maintain the stability between the user equipment and the network. So, primary cell is the part of a master node. Typically, it could be the eNodeB in case of LTE, or it could be gNodeB in NR-DC. Here, we are taking an example of NR-DC where the primary cell here is the gNodeB. It belongs to gNodeB, and it has certain responsibilities. It handles the control plane. It means it handles the RRC signaling part or the mobility part. It manages the radio resource control connection, which is the RRC connection. It also provides the initial better setup and security, and it serves as the foundation for adding a secondary node later on. So, think of PCell as the lead…
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