Question: In UTRAN Iub interface Node B Application Part (NBAP) signalling, how is the Capacity Credit updated for multiple channelization codes used by a single physical channel in FDD mode?
Option 1: The cost is divided by the number of channelization codes (N) before being debited from or credited to the Capacity Credit.
Option 2: A fixed additional cost is added to the Capacity Credit for each additional channelization code beyond the first.
Option 3: The cost given in the consumption law is multiplied by the number of channelization codes (N) before being debited from or credited to the Capacity Credit.
Option 4: No adjustment is made; the cost per channelization code remains constant regardless of the number used.
Explanation: In FDD mode, when multiple channelization codes are utilized by a physical channel, the update to the Capacity Credit for this physical channel is calculated by multiplying the cost given in the consumption law by the number of channelization codes (N), accurately reflecting resources used by all associated channelization codes.