User equipment capability signaling
A user equipment (UE) configured for signaling UE capability is described. The UE includes a processor and instructions stored in memory that is in electronic communication with the processor. The UE sends an indicator regarding whether the UE can support different time division duplex (TDD) configurations on different bands for a band combination. The UE also sends an indicator regarding whether the UE can support concurrent transmission and reception on different bands for the band combination. The UE additionally sends an indicator regarding whether the UE can support different uplink timing adjustments for the band combination.
1. A user equipment (UE), comprising:
a processor;
a memory in electronic communication with the processor; and
instructions stored in the memory, the instructions being executable to:
receive radio resource control (RRC) signaling indicating whether to perform simultaneous transmission and reception between Time Division Duplex (TDD) serving cells;
determine, based on the RRC signaling, whether
(i) the UE can perform, while the TDD serving cells are aggregated, the simultaneous transmission and reception; or
(ii) the UE cannot perform, while the TDD serving cells are aggregated, the simultaneous transmission and reception; and
select one of uplink-downlink configurations of the TDD serving cells based on the RRC signaling; wherein
the UE communicates with a base station on at least one of the TDD serving cells using the selected one of the uplink-downlink configurations.
2. A method performed by user equipment (UE), comprising:
receiving radio resource control (RRC) signaling indicating whether to perform simultaneous transmission and reception between Time Division Duplex (TDD) serving cells;
determining, based on the RRC signaling, whether
(i) the UE can perform, while the TDD serving cells are aggregated, the simultaneous transmission and reception; or
(ii) the UE cannot perform, while the TDD serving cells are aggregated, the simultaneous transmission and reception; and
selecting one of uplink-downlink configurations of the TDD serving cells based on the RRC signaling; wherein
the UE communicates with a base station on at least one of the TDD serving cells using the selected one of the uplink-downlink configurations.
3. A base station, comprising:
a processor;
a memory in electronic communication with the processor;
instructions stored in the memory, the instructions being executable to:
send, to a user equipment (UE), radio resource control (RRC) signaling which causes the UE to
(a) determine, based on the RRC signaling, whether
(i) the UE can perform, while Time Division Duplex (TDD) serving cells are aggregated, simultaneous transmission and reception between the TDD serving cells; or
(ii) the UE cannot perform, while the TDD serving cells are aggregated, the simultaneous transmission and reception; and to
(b) select one of uplink-downlink configurations of the TDD serving cells based on the RRC signaling; wherein
the UE communicates with the base station on at least one of the TDD serving cells using the selected one of the uplink-downlink configurations.
4. A method performed by a base station, comprising:
sending, to a user equipment (UE), radio resource control (RRC) signaling which causes the UE to
(a) determine, based on the RRC signaling, whether
(i) the UE can perform, while Time Division Duplex (TDD) serving cells are aggregated, simultaneous transmission and reception between the TDD serving cells; or
(ii) the UE cannot perform, while the TDD serving cells are aggregated, the simultaneous transmission and reception; and to
(b) select one of uplink-downlink configurations of the TDD serving cells based on the RRC signaling; wherein
the UE communicates with the base station on at least one of the TDD serving cells using the selected one of the uplink-downlink configurations.