In LTE networks, X2 interface connects two or more eNBs, and S1 interface connects the eNBs to EPC. In 5G networks, are there any changes to these two interfaces?
5G operates in two modes as non-standalone and standalone mode of operation. For 5G NSA, specification defined the extension for S1 and X2 interfaces, whereas new interfaces are defined in 5G SA:
NG: The NG interface connects gNBs and 5GC. It carries control plane and user plane traffic, and it is responsible for functions such as mobility management, session management, and data transfer.
Xn: In 5G networks, the Xn interface plays a crucial role in inter-gNB communication and related functionalities. It facilitates seamless mobility and efficient resource management, allowing gNBs to exchange control plane and user plane information. Additionally, it enables essential functions like inter-cell and inter-gNB handover, load balancing, and coordination for efficient network operation.
Other new interfaces are listed below:
· F1/E1: interface for Function Split and Open Interface within RAN Node
· eCPRI: interface between PHY and Radio
