Methods for PDCCH monitoring, user equipment, and base station

A method for configuring Physical Downlink Control Channel (PDCCH) monitoring for User Equipment (UE), performed by a base station, comprising:

• providing a switching delay and a second condition to the UE;
• providing the UE with a time threshold and/or a Channel Occupancy Time (COT) duration occupied by the base station, wherein the time threshold and/or the COT duration allows the UE to perform:
• a first switching step, comprising:
• switching from monitoring a PDCCH of a serving cell according to a second Search Space Set (SSS) group to monitoring the PDCCH according to a first SSS group, under the first condition based on the time threshold and/or based on the COT duration;
• being provided the switching delay before a second switching step and after the second condition is fulfilled;
• the second switching step, comprising:
• switching from monitoring the PDCCH according to the first SSS group to monitoring the PDCCH according to the second SSS group, under the second condition based on a monitoring group flag in the detected DCI format 2_0, and/or a detection of a PDCCH by monitoring the PDCCH according to the first SSS group, wherein the time threshold is determined from a threshold set.

User equipment (UE), configured to perform:

• a first switching, comprising:
• switching from monitoring a PDCCH of a serving cell according to a second Search Space Set (SSS) group to monitoring the PDCCH according to a first SSS group, under a first condition based on a time threshold and/or based on a Channel Occupancy Time (COT) duration occupied by a base station of a serving cell;
• being provided a switching delay before a second switching and after a second condition is fulfilled;
• the second switching, comprising:
• switching from monitoring the PDCCH according to the first SSS group to monitoring the PDCCH according to the second SSS group, under the second condition based on a monitoring group flag in a detected Downlink Control information (DCI) format 2_0, and/or a detection of a PDCCH by monitoring the PDCCH according to the first SSS group.

A base station, configured to perform:

• providing a switching delay and a second condition to User Equipment (UE);
• providing the UE with a time threshold and/or a Channel Occupancy Time (COT) duration occupied by the base station, wherein the time threshold and/or the COT duration allows the UE to perform:
• a first switching, comprising:
• switching from monitoring a PDCCH of a serving cell according to a second Search Space Set (SSS) group to monitoring the PDCCH according to a first SSS group, under the first condition based on the time threshold and/or based on the COT duration;
• being provided the switching delay before a second switching and after the second condition is fulfilled;
• the second switching, comprising:
• switching from monitoring the PDCCH according to the first SSS group to monitoring the PDCCH according to the second SSS group, under the second condition based on a monitoring group flag in the detected DCI format 2_0, and/or a detection of a PDCCH by monitoring the PDCCH according to the first SSS group, wherein the time threshold is determined from a threshold set.