NSA mode stands for Non-Standalone mode, which is a technology that allows 5G networks to be deployed using existing 4G infrastructure. In NSA mode, 5G connections are built on a 4G core network, with 5G NR (New Radio) access nodes connecting devices to the network. This setup allows for data speeds that are faster than those of 4G, but not as fast as those of a full 5G network. NSA mode was developed to give carriers the ability to roll out 5G coverage quickly and cost-effectively. In areas where a full 5G network isn’t yet available, carriers can still provide 5G coverage by using NSA mode. This allows them to provide faster data speeds to their customers without having to invest in the equipment and infrastructure needed for a full 5G network.
NSA mode is different from SA (Standalone) mode, which is an end-to-end 5G network with both a 5G RAN (Radio Access Network) and NR (New Radio) core. In SA mode, the NR is connected to the 5G CN (Core Network), and only in this configuration, the full set of 5G Phase 1 services are supported.
In summary, NSA mode is a way to deploy 5G networks using existing 4G infrastructure, while SA mode is an end-to-end 5G network with both a 5G RAN and NR core.
