Question: In UTRAN Iur interface, which of the following accurately describes the role of RNC1 in the Common Measurement Initiation procedure?
Option 1: RNC1 is the recipient of measurement requests and is responsible for reporting common resource measurements.
Option 2: RNC1 initiates the request to another RNC (RNC2) for the measurement of common resources, utilizing the signalling bearer connection.
Option 3: RNC1 is the entity that performs the actual measurement of common resources without needing a prior request from another RNC.
Option 4: RNC1 serves as a relay node for forwarding measurement requests from one RNC to another (e.g., to RNC2).
Explanation: In the context of UTRAN's Iur interface and the Common Measurement Initiation procedure, RNC1 is defined as the requesting RNC. This means it takes the initiative to ask another RNC, referred to as RNC2, to start measuring common resources. The use of the signalling bearer connection for the Distant RNC Context further supports this role, highlighting the communication aspect between RNCs for measurement initiation. Thus, Option 2 correctly captures the essence of RNC1's role in this procedure.