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US 2023/0413167 A1Published application
Method, ue, apparatus, and storage medium for monitoring control channel in wireless communication system, and method and bs for transmitting control channel
AssigneeLG Electronics Inc.
InventorsSeunghwan CHOI, Suckchel YANG, Seonwook KIM
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Abstract
A UE performs PDCCH monitoring for at least one serving cell by switching a search space set of a first SSSG to a search space of a second SSSG at a search space set group (SSSG) switching time. When PDCCH monitoring is performed in a unit of a slot-group for the at least one serving cell, the UE determines the SSSG switching time based on a largest Xs value among Xs values for the at least one serving cell.
Claims17
A method of monitoring a control channel by a user equipment (UE) in a wireless communication system, the method comprising:
- performing physical downlink control channel (PDCCH) monitoring according to search space sets with a first group index for a serving cell;
- and
- based on detection of a downlink control information (DCI) format used for notifying SSSG switching and based on a subcarrier spacing in the serving cell being equal to 960 kHz:
- at a beginning of a first slot, of a slot-group of Xs slots, that is at least predetermined number Pswitch symbols after a last symbol of a PDCCH with the DCI format, performing the SSSG switching that includes i) starting PDCCH monitoring according to search space sets with a second group index and ii) stopping PDCCH monitoring according to the search space sets with the first group index, for the serving cell, where slot-groups of Xs slots are consecutive, and
- wherein, based on a set of serving cells including the serving cell with the subcarrier spacing of 960 kHz, the UE determines a slot and a symbol in the slot to start or stop PDCCH monitoring according to search space sets for the set of serving cells based on a largest Xs value for the set of serving cells.
2 more elements
A user equipment (UE) for monitoring a control channel in a wireless communication system, comprising:
- at least one transceiver;
- at least one processor;
- and
- at least one computer memory operatively connected to the at least one processor and configured to store instructions that when executed causes the at least one processor to perform operations including:
- performing physical downlink control channel (PDCCH) monitoring according to search space sets with a first group index for a serving cell;
- and
- based on detection of a downlink control information (DCI) format used for notifying SSSG switching and based on a subcarrier spacing in the serving cell being equal to 960 kHz:
- at a beginning of a first slot, of a slot-group of Xs slots, that is at least predetermined number Pswitch symbols after a last symbol of a PDCCH with the DCI format, performing the SSSG switching that includes i) starting PDCCH monitoring according to search space sets with a second group index and ii) stopping PDCCH monitoring according to the search space sets with the first group index, for the serving cell, where slot-groups of Xs slots are consecutive, and
- wherein, based on a set of serving cells including the serving cell with the subcarrier spacing of 960 kHz, the UE determines a slot and a symbol in the slot to start or stop PDCCH monitoring according to search space sets for the set of serving cells based on a largest Xs value for the set of serving cells.
6 more elements
A base station (BS) for transmitting a control channel in a wireless communication system, comprising:
- at least one transceiver;
- at least one processor;
- and
- at least one computer memory operatively connected to the at least one processor and configured to store instructions that when executed causes the at least one processor to perform operations including:
- transmitting at least one physical downlink control channel (PDCCH) according to the search space set with a first group index for a serving cell;
- and
- based on transmission of a downlink control information (DCI) format used for notifying search space set group (SSSG) switching and based on a subcarrier spacing in the serving cell being equal to 960 kHz:
- at a beginning of a first slot, of a slot-group of Xs slots, that is at least predetermined number Pswitch symbols after a last symbol of a PDCCH with the DCI format, performing the SSSG switching that includes i) starting transmitting at least one PDCCH according to search space sets with a second group index and ii) stopping transmitting at least one PDCCH according to the search space sets with the first group index, for the serving cell, where slot-groups of Xs slots are consecutive, and
- wherein, based on a set of serving cells including the serving cell with the subcarrier spacing of 960 kHz, the BS determines a slot and a symbol in the slot to perform the SSSG switching based on a largest Xs value for the set of serving cells.
6 more elements
Dependencies are inferred from the claim text.