Question: Which entity is responsible for controlling logical resources (e.g., channels, cells) that are physically implemented in the Node B, and what is the name of the protocol over which the associated signalling (Logical O&M) takes place?
Option 1: RNC (Radio Network Controller), with Logical O&M signalling forming part of NBAP (Node B Application Part) over the Iub interface.
Option 2: Node B, with Logical O&M signalling forming part of S1AP (S1 Application Protocol) over the S1 interface.
Option 3: RNC (Radio Network Controller), with Logical O&M signalling forming part of SS7 (Signalling System No. 7) over the A interface.
Option 4: Node B, with Logical O&M signalling forming part of X2AP (X2 Application Protocol) over the X2 interface.
Explanation: This is correct because the RNC controls logical resources physically implemented in Node B. The signalling associated with this control, known as Logical O&M, is an integral part of NBAP and takes place over the Iub interface between the RNC and Node B, highlighting the RNC's role in managing UTRAN resources.