Question: In E-UTRA Base Station (BS) radio transmission, for SPUCCH format 4, what is the implication of an ACK missed detection on the error count, given the number of encoded ACK/NACK bits per subslot?
Option 1: Each undetected ACK bit in a subslot increments the error count by the total number of encoded ACK/NACK bits (3) in that subslot.
Option 2: The error count remains unchanged for the entire transmission if at least one ACK bit is correctly detected in any subslot with =2 or =3.
Option 3: An ACK missed detection affects only the specific bit position, without impacting the overall subslot's error status.
Option 4: Each missed ACK bit, regardless of the subslot (=2 or =3) configuration, is counted as a single error in the overall transmission error tally.
Explanation: According to the context, each missed ACK bit is accounted as one error. This implies that the error count increments by one for every undetected ACK bit, irrespective of the subslot configuration (=2 or =3) or the total number of encoded bits (3) in a subslot. Thus, the correct approach to counting errors from ACK missed detections is on a per-bit basis, not aggregated by subslot or scaled by the number of encoded bits.