X2 Interface

X2 - This is the interface between eNode Bs. The interface is mainly used to support active mode UE mobility.

This interface may also be used for multi-cell Radio Resource Management (RRM) functions. The X2-CP interface will consist of a signalling protocol called X2-AP on top of SCTP.

The X2-UP interface is based on GTP-U.

The X2-UP interface will be used to support loss-less mobility (packet forwarding).

The X2 interface is a many-to-many interface.

LTE X2 Interface