User equipment, base station, a method performed by a user equipment (UE) and a method performed by a base station for multi-group communications
A User Equipment (UE) configured for multi-group communications is described. The UE includes a processor and instructions stored in memory that is in electronic communication with the processor. The UE detects a plurality of cells. The UE also determines to use multiple groups of one or more cells. The UE further determines a primary secondary cell (PSCell) for a non-primary cell (non-PCell) group based on UE-specific radio resource control (RRC) signaling. The UE additionally receives information using the multiple groups.
1. A User Equipment (UE), comprising:
a computer processor;
a memory in electronic communication with the computer processor;
instructions stored in the memory, the instructions being executable by the computer processor to:
receive, from a base station, a radio resource control, RRC, message including a configuration to indicate a specific cell for non-PCell group among multiple groups, each of multiple groups which is constituted by one or more serving cells; wherein
a serving cell which is included in one group of the multiple groups is a primary cell (PCell),
a serving cell which is included in another group of the multiple groups is a specific cell,
the primary cell (PCell) is configured with a physical uplink control channel (PUCCH), and
the specific cell is configured with a physical uplink control channel (PUCCH),
the primary cell (PCell) is configured with a physical random access channel (PRACH), and
the specific cell is configured with a physical random access channel (PRACH),
perform a radio link monitoring in the primary cell,
perform a radio link monitoring in the specific cell,
decode a physical downlink control channel (PDCCH) with a cyclic redundancy check (CRC) scrambled by a first random access radio network temporary identifier (RA-RNTI) in a common search space on the PCell; and
decode a physical downlink control channel (PDCCH) with a cyclic redundancy check (CRC) scrambled by a second random access radio network temporary identifier (RA-RNTI) in a common search space on the specific cell;
wherein one or more hybrid automatic repeat request acknowledgements (HARQ-ACK(s)) for the one group are mapped to the PUCCH on the PCell; and
one or more hybrid automatic repeat request acknowledgements (HARQ-ACK(s)) for the another group are mapped to the PUCCH on the specific Cell.
2. A base station, comprising:
a computer processor;
a memory in electronic communication with the computer processor;
instructions stored in the memory, the instructions being executable by the computer processor to:
transmit, to a user equipment, a radio resource control, RRC, message including a configuration to indicate a specific cell for non-PCell group among multiple groups, each of multiple groups which is constituted by one or more serving cells; wherein
a serving cell which is included in one group of the multiple groups is a primary cell (PCell),
a serving cell which is included in another group of the multiple groups is a specific cell,
the primary cell (PCell) is configured with a physical uplink control channel (PUCCH), and
the specific cell is configured with a physical uplink control channel (PUCCH),
the primary cell (PCell) is configured with a physical random access channel (PRACH), and
the specific cell is configured with a physical random access channel (PRACH),
a radio link monitoring in the primary cell is performed by the user equipment,
a radio link monitoring in the specific cell is performed by the user equipment,
encode a physical downlink control channel (PDCCH) with a cyclic redundancy check (CRC) scrambled by a first random access radio network temporary identifier (RA-RNTI) in a common search space on the PCell; and
encode a physical downlink control channel (PDCCH) with a cyclic redundancy check (CRC) scrambled by a second random access radio network temporary identifier (RA-RNTI) in a common search space on the specific cell;
wherein one or more hybrid automatic repeat request acknowledgements (HARQ-ACK(s)) for the one group are mapped to the PUCCH on the PCell; and
one or more hybrid automatic repeat request acknowledgements (HARQ-ACK(s)) for the another group are mapped to the PUCCH on the specific Cell.
3. A method performed by a User Equipment (UE), comprising:
receiving, from a base station, a radio resource control, RRC, message including a configuration to indicate a specific cell for non-PCell group among multiple groups, each of multiple groups which is constituted by one or more serving cells; wherein
a serving cell which is included in one group of the multiple groups is a primary cell (PCell),
a serving cell which is included in another group of the multiple groups is a specific cell,
the primary cell (PCell) is configured with a physical uplink control channel (PUCCH), and
the specific cell is configured with a physical uplink control channel (PUCCH),
the primary cell (PCell) is configured with a physical random access channel (PRACH), and
the specific cell is configured with a physical random access channel (PRACH),
performing a radio link monitoring in the primary cell,
performing a radio link monitoring in the specific cell,
decoding a physical downlink control channel (PDCCH) with a cyclic redundancy check (CRC) scrambled by a first random access radio network temporary identifier (RA-RNTI) in a common search space on the PCell; and
decoding a physical downlink control channel (PDCCH) with a cyclic redundancy check (CRC) scrambled by a second random access radio network temporary identifier (RA-RNTI) in a common search space on the specific cell;
wherein one or more hybrid automatic repeat request acknowledgements (HARQ-ACK(s)) for the one group are mapped to the PUCCH on the PCell; and
one or more hybrid automatic repeat request acknowledgements (HARQ-ACK(s)) for the another group are mapped to the PUCCH on the specific Cell.
4. A method performed by a base station, comprising:
transmitting, to a user equipment, a radio resource control, RRC, message including a configuration to indicate a specific cell for non-PCell group among multiple groups, each of multiple groups which is constituted by one or more serving cells; wherein
a serving cell which is included in one group of the multiple groups is a primary cell (PCell),
a serving cell which is included in another group of the multiple groups is a specific cell,
the primary cell (PCell) is configured with a physical uplink control channel (PUCCH), and
the specific cell is configured with a physical uplink control channel (PUCCH),
the primary cell (PCell) is configured with a physical random access channel (PRACH), and
the specific cell is configured with a physical random access channel (PRACH),
a radio link monitoring in the primary cell is performed by the user equipment,
a radio link monitoring in the specific cell is performed by the user equipment,
encoding a physical downlink control channel (PDCCH) with a cyclic redundancy check (CRC) scrambled by a first random access radio network temporary identifier (RA-RNTI) in a common search space on the PCell; and
encoding a physical downlink control channel (PDCCH) with a cyclic redundancy check (CRC) scrambled by a second random access radio network temporary identifier (RA-RNTI) in a common search space on the specific cell;
wherein one or more hybrid automatic repeat request acknowledgements (HARQ-ACK(s)) for the one group are mapped to the PUCCH on the PCell; and
one or more hybrid automatic repeat request acknowledgements (HARQ-ACK(s)) for the another group are mapped to the PUCCH on the specific Cell.