DCI-Controlled PDCCH Search Space Switching Across Serving Cells

The patent applies dynamics by enabling the UE to switch between different search space groups (group 0 and group 1) based on dynamic conditions such as timer expiration or channel occupancy duration. The UE monitors PDCCH in one group at a time and switches to another group when conditions change, rather than simultaneously monitoring both groups. This dynamic switching mechanism maintains communication reliability while reducing power consumption by keeping the UE in a lower-power state when possible.

The patent implements periodic action through timer-based mechanisms where the UE switches search space groups periodically based on timer expiration. The UE alternates between monitoring PDCCH in different search space groups at predetermined intervals, ensuring continuous coverage while allowing power-saving periods when no switching is required. This periodic switching maintains reliability without requiring continuous high-power monitoring of all groups simultaneously.

The patent applies feedback by using DCI format 2_0 indications from the network to control search space group switching. The network provides feedback information through the DCI that tells the UE when to switch between search space groups based on actual channel conditions and occupancy status. This feedback mechanism enables adaptive switching without requiring the UE to make complex decisions autonomously, reducing control complexity while maintaining adaptability.

The patent implements self-service by enabling the UE to automatically switch search space groups based on pre-configured conditions such as timer expiration or channel occupancy duration without requiring explicit network commands for each switch. The UE monitors its own state and autonomously decides when to switch groups based on the configured criteria, reducing control complexity while maintaining adaptability to changing conditions.

The patent applies dynamics by enabling the UE to switch between different search space groups with different LBT priorities based on dynamic channel conditions and occupancy status. When the UE has channel occupancy from a previous transmission, it can use higher priority LBT mode for faster access. When the channel is idle or occupancy has expired, it switches to lower priority LBT mode to ensure fairness with other UEs. This dynamic adjustment maintains both productivity and fairness.

The patent implements periodic action through timer-based mechanisms that periodically reset LBT priority levels. The UE uses higher priority LBT mode during occupied channels and periodically switches to lower priority mode after the occupancy duration expires. This periodic switching ensures that other UEs get fair access opportunities while the current UE can quickly re-access the channel when needed, balancing productivity and fairness.