Question: In a UMTS network, during an inter-cell soft handover involving cells defined by the Radio Link Set (RLS), what is the primary purpose of verifying the average probability for missed ACK when E-HICH is transmitted using 3 consecutive slots in Cell 1?
Option 1: To ensure seamless handover between cells within the RLS, optimizing user experience.
Option 2: To evaluate the impact of E-DCH cell changes on uplink data transmission reliability.
Option 3: To test the downlink coverage of Cell 2 when not containing the Serving E-DCH cell.
Option 4: To validate that the error rate in ACK/NACK feedback for HSDPA transmissions remains within specified limits.
Explanation: The correct answer focuses on validating the error rate in ACK/NACK feedback, crucial for maintaining reliable and efficient data transmission over HSDPA. E-HICH transmitting 3 consecutive slots is related to the downlink ACK/NACK process. The question's context implies ensuring missed ACK probabilities do not exceed specified values, impacting HSDPA transmissions' reliability.