NBAP

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In the 3GPP UTRAN architecture, NBAP (Node B Application Part) [1] 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.

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