NBAP

In the 3GPP UTRAN architecture, NBAP (Node B Application Part) is the signalling protocol responsible for the control of the Node B by the RNC. NBAP is subdivided into Common and Dedicated NBAP (C-NBAP and D-NBAP), where Common NBAP controls overall Node B functionality, and Dedicated NBAP controls radio links to specific user equipment. NBAP forms part of the Iub interface.

NBAP handles two kind of Procedures for different NBAP functionalities
 * Common Procedures
 * for Managing Logical O & M Functions
 * for Controlling BCCH Broadcast
 * for creating new Node B Communication Context
 * Dedicated Procedures
 * for handling procedures of an existing Node B Communication Context in a TTP/CCP.