User equipment, base station, and communication control method
View Patent ↗A user equipment 100 to which a plurality of cell groups are configured by a base station 200 , comprises the steps of: receiving a switching instruction for giving an instruction about switching of search space set groups (SSSGs) in serving cells belonging to any cell group of the plurality of cell groups from the base station 200 ; specifying a target cell group as a switching target of the SSSG from among the plurality of cell groups based on a cell identifier or a cell group identifier included in the switching instruction. The UE 100 is configured to simultaneously switch the SSSGs of all the serving cells in the specified target cell group in response to the reception of the switching instruction.
1 . A communication apparatus comprising:
a receiver configured to receive, from a base station, a radio resource control (RRC) message including configurations for one or more search space sets and a configuration for a value of switching delay, wherein each of the configurations for the one or more search space sets includes information indicating which of a first search space set group identified by a group index “0”, a second search space set group identified by a group index “1”, and a third search space set group identified by a group index “2”, each of the configurations for the one or more search space sets is associated with, and
a controller configured to control, based on a value of information field included in downlink control information (DCI), physical downlink control channel (PDCCH) monitoring in a downlink bandwidth part (BWP) of a serving cell, the DCI being used for scheduling of a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), wherein:
the controller is configured to:
start, based on the configuration for the value of the switching delay, the PDCCH monitoring according to the first search space set group in a case that the PDCCH monitoring according to the second search space set group is performed and a timer of a timer value expires, and
start, based on the configuration for the value of the switching delay, the PDCCH monitoring according to the first search space set group in a case that the PDCCH monitoring according to the third search space set group is performed and the timer of the timer value expires.
2 . The communication apparatus according to claim 1 , wherein;
the receiver is configured to receive, from the base station, the RRC message including a configuration for the timer value.
3 . The communication apparatus according to claim 1 , wherein;
CRC parity bits scrambled by one of a cell-radio network temporary identifier (C-RNTI), a modulation and coding scheme-C-RNTI (MCS-C-RNTI), and a configured scheduling-RNTI (CS-RNTI) is attached to the DCI.
4 . A base station comprising:
a transmitter configured to transmit, to a communication apparatus, a radio resource control (RRC) message including configurations for one or more search space sets and a configuration for a value of switching delay, wherein each of the configurations for the one or more search space sets includes information indicating which of a first search space set group identified by a group index “0”, a second search space set group identified by a group index “1”, and a third search space set group identified by a group index “2”, each of the configurations for the one or more search space sets is associated with, and
a controller configured to control, based on a value of information field included in downlink control information (DCI), for the communication apparatus to perform physical downlink control channel (PDCCH) monitoring in a downlink bandwidth part (BWP) of a serving cell, the DCI being used for scheduling of a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH), wherein:
the PDCCH monitoring according to the first search space set group is started based on the configuration for the value of the switching delay in a case that the PDCCH monitoring according to the second search space set group is indicated and a timer of a timer value expires, and
the PDCCH monitoring according to the first search space set group is started based on the configuration for the value of the switching delay in a case that the PDCCH monitoring according to the third search space set group is indicated and the timer of the timer value expires.
5 . The base station according to claim 4 , wherein;
the transmitter is configured to transmit, to the communication apparatus, the RRC message including a configuration for the timer value.
6 . The base station according to claim 4 , wherein
CRC parity bits scrambled by one of a cell-radio network temporary identifier (C-RNTI), a modulation and coding scheme-C-RNTI (MCS-C-RNTI), and a configured scheduling-RNTI (CS-RNTI) is attached to the DCI.
7 . A communication method performed by a communication apparatus, the communication method comprising:
receiving, from a base station, a radio resource control (RRC) message including configurations for one or more search space sets and a configuration for a value of switching delay, wherein each of the configurations for the one or more search space sets includes information indicating which of a first search space set group identified by a group index “0”, a second search space set group identified by a group index “1”, and a third search space set group identified by a group index “2”, each of the configurations for the one or more search space set group is associated with;
controlling, based on a value of information field included in downlink control information (DCI), physical downlink control channel (PDCCH) monitoring in a downlink bandwidth part (BWP) of a serving cell, the DCI being used for scheduling of a physical downlink shared channel (PDSCH) or a physical uplink shared channel (PUSCH);
starting, based on the configuration for the value of the switching delay, the PDCCH monitoring according to the first search space set group in a case that the PDCCH monitoring according to the second search space set group is performed and a timer of a timer value expires; and
starting, based on the configuration for the value of the switching delay, the PDCCH monitoring according to the first search space set group in a case that the PDCCH monitoring according to the third search space set group is performed and the timer of the timer value expires.
8 . The communication method according to claim 7 , further comprising:
receiving, from the base station, the RRC message including a configuration for the timer value.
9 . The communication method according to claim 7 , wherein;
CRC parity bits scrambled by one of a cell-radio network temporary identifier (C-RNTI), a modulation and coding scheme-C-RNTI (MCS-C-RNTI), and a configured scheduling-RNTI (CS-RNTI) is attached to the DCI.