Question: When adjusting the contention window for an eNB's transmissions associated with a channel access priority class on a shared spectrum channel, how are HARQ-ACK values corresponding to PDSCH transmissions evaluated if no feedback is detected or 'DTX' state is encountered, specifically for transmissions assigned by (E)PDCCH transmitted **on the same LAA SCell**?
Option 1: Ignored for contention window adjustment.
Option 2: Counted as NACK for increasing the contention window value.
Option 3: Considered as ACK for decreasing the contention window value.
Option 4: Evaluated based on the UE's PUCCH format (e.g., format 1b with channel selection).
Explanation: According to the specified procedures for adjusting the contention window in response to HARQ-ACK feedback, if no HARQ-ACK feedback is detected for a PDSCH transmission by the eNB or if the eNB detects 'DTX', 'NACK/DTX', or 'any' state for transmissions on an LAA SCell assigned by (E)PDCCH transmitted on the **same** LAA SCell, these scenarios are counted as NACK. This counting as NACK would trigger an increase in the contention window value to the next higher allowed value, reflecting a need for more cautious access due to unsuccessful transmissions or lack of feedback.