Question: What does the Process Memory Size Information Element (IE) primarily indicate in the UTRAN Iur interface Radio Network Subsystem Application Part (RNSAP) signalling?
Option 1: The minimum number of soft channel bits required for handover procedures.
Option 2: The maximum size of an HARQ process in the DRNS, expressed in bits, reflecting the virtual IR buffer capacity.
Option 3: The average processing power allocated to each User Equipment (UE) in the network.
Option 4: The total memory reserved for all RNSAP signalling processes within a Node B.
Explanation: The Process Memory Size IE is about the maximum size of an HARQ process in terms of bits, relating to the capacity of the virtual IR buffer, crucial for efficient data transfer and retransmission handling in the UTRAN network.