Question: In UTRAN, where is the Admission Control function based on uplink interference and downlink power primarily located, and what is its role regarding Node B's reporting?
Option 1: In Node B; it autonomously decides the reporting frequency for uplink interference measurements and downlink power information.
Option 2: In Node B; but CRNC controls the reporting period for uplink interference measurements and downlink power information.
Option 3: In CRNC (Controlling RNC); it also controls whether and how often Node B reports uplink interference measurements and downlink power information.
Option 4: In both CRNC and Node B; they jointly decide the necessity and frequency of reporting uplink interference and downlink power.
Explanation: The correct answer is Option 3 because, according to the principles outlined for UTRAN's Iub interface, the Admission Control function that considers uplink interference and downlink power is situated in the CRNC. Moreover, this component of the network is responsible for dictating whether Node B should report on these metrics and how often such reports should be submitted, highlighting the centralized control aspect of CRNC in managing network resource allocation and optimization.