SCG (Secondary Cell Group)
However, in the context of cellular networks, there is a concept called Secondary Cell (SC). Secondary Cells are additional cells that can be established in addition to the Primary Cell (PC) in Long-Term Evolution (LTE) and 5G networks. These cells are used to provide additional capacity, coverage, or specialized services.
Secondary Cells can be of different types, such as:
- Carrier Aggregation Secondary Cell (CA-SC): In LTE and 5G, carrier aggregation allows the simultaneous use of multiple frequency bands to increase data rates. The additional cells used for carrier aggregation are referred to as Carrier Aggregation Secondary Cells.
- Dual Connectivity Secondary Cell (DC-SC): Dual Connectivity is a feature introduced in 5G networks that allows a user equipment (UE) to simultaneously connect to multiple base stations. The secondary cell used in dual connectivity is called the Dual Connectivity Secondary Cell.
- Secondary Serving Cell (SSC): In LTE networks, a UE can have multiple serving cells, with one primary serving cell and one or more secondary serving cells. The secondary serving cells are used to increase the data rate and capacity for the UE.
It's important to note that these definitions are based on my understanding up until September 2021. If "Secondary Cell Group" (SCG) is a new term or used in a different context, I may not have the specific information on it. If you can provide more details or clarify the context in which SCG is used, I'll do my best to assist you further.