Adaptive Channel Occupancy Time Management in Unlicensed Spectrum

The patent implements dynamic adjustment of channel occupancy time by introducing a timing offset parameter that varies based on listen-before-talk success timing. Instead of using a fixed maximum channel occupancy time, the system calculates an adjusted occupancy time by adding a timing offset to a base value, allowing the channel access parameters to adapt to real-time conditions while maintaining manageable device complexity through algorithmic adjustment rather than hardware complexity.

The patent changes the parameter of channel occupancy time from a fixed value to a dynamically calculated value based on timing offsets. The system determines an adjusted maximum channel occupancy time by adding a timing offset (derived from listen-before-talk success timing relative to synchronization references) to a base occupancy time. This parameter change enables the system to maintain operational simplicity while achieving fairness among multiple nodes through adaptive timing adjustment.

The patent implements feedback mechanisms by monitoring listen-before-talk success timing and using this information to adjust channel occupancy time parameters. The system continuously measures the timing offset between LBT success moments and synchronization reference boundaries, then uses this feedback to determine appropriate timing offsets for subsequent channel access. This feedback loop enables adaptive quality of service while managing device complexity through systematic parameter adjustment based on observed conditions.

The patent applies preliminary action by pre-defining base channel occupancy times and synchronization reference boundaries before actual channel access occurs. The system establishes timing offset calculations in advance based on the relationship between LBT success timing and synchronization references. This preliminary configuration enables accurate synchronization during operation while reducing processing complexity by avoiding real-time complex calculations, as the framework and adjustment parameters are prepared beforehand.