Question: When utilizing the "Split Mode" for TFCI Signalling, what additional specification is provided for a "Logical Split" (as opposed to a "Hard Split") in UTRAN's NBAP signalling?
Option 1: The specific radio frame offset for the split transmission
Option 2: The number of bits allocated for error correction in the TFCI
Option 3: The number of bits in the TFCI (field 2)
Option 4: The mandatory use of beamforming for the split signals
Explanation: In the context of UTRAN's NBAP signalling, specifically for TFCI Signalling Mode, when "Split Mode" is chosen and further specified as a "Logical Split", an additional detail is provided to clarify the configuration. Unlike a "Hard Split", which might imply a fixed or predefined division, a "Logical Split" requires specifying **the number of bits in the TFCI (field 2)**. This specification is crucial for accurately interpreting and processing the split TFCI, ensuring seamless communication between nodes in the UTRAN network. It directly impacts how the receiving end reassembles or interprets the TFCI information, highlighting its importance in maintaining efficient and error-free data transfer.