X2 Application Protocol (X2AP)

The X2AP protocol is used to handle the UE mobility within E-UTRAN and provides the following functions:

·         Mobility Management

·         Load Management

·         Reporting of General Error Situations

·         Resetting the X2

·         Setting up the X2

·         eNB Configuration Update

Protocol specification

3GPP TS 36.423 - Evolved Universal Terrestrial Radio Access Network (E-UTRAN); X2 Application Protocol (X2AP)