Systems and methods for signaling reference configurations
A user equipment (UE) for receiving time-division duplexing (TDD) uplink/downlink (UL/DL) configurations is described. The UE includes a processor and instructions stored in memory that is in electronic communication with the processor. The UE receives a primary TDD UL/DL configuration for a serving cell and reconfiguration information. The UE determines a downlink (DL)-reference TDD UL/DL configuration based on the primary TDD UL/DL configuration and the reconfiguration information. The UE determines an uplink (UL)-reference TDD UL/DL configuration based on the primary TDD UL/DL configuration and the reconfiguration information. The UE performs Physical Downlink Shared Channel (PDSCH) operations based on the DL-reference TDD UL/DL configuration. The UE performs Physical Uplink Shared Channel (PUSCH) operations based on the UL-reference TDD UL/DL configuration.
1. A user equipment (UE) comprising:
a processor; and
memory in electronic communication with the processor, wherein instructions stored in the memory are executable to:
receive, using a receiver, a physical downlink control channel (PDCCH) indicating an actual TDD UL/DL configuration in a serving cell;
configure a downlink (DL)-reference TDD UL/DL configuration of the serving cell based on a DL-reference TDD UL/DL configuration configured based on radio resource control (RRC) signaling and a UL/DL configuration that the UE has dynamically received on the PDCCH; and
configure an uplink (UL)-reference TDD UL/DL configuration of the serving cell, wherein
the DL-reference TDD UL/DL configuration and the UL-reference TDD UL/DL configuration are configured based on higher layer signaling,
the DL-reference TDD UL/DL configuration is used for Physical Downlink Shared Channel (PDSCH) operations, and
the UL-reference TDD UL/DL configuration is used for Physical Uplink Shared Channel (PUSCH) operations.
2. The UE of claim 1 , wherein the UL-reference TDD UL/DL configuration is configured based on system information block (SIB).
3. The UE of claim 1 , wherein the PDCCH indicating the actual TDD UL/DL configuration in a next radio frame.
4. The UE of claim 1 , wherein the actual TDD UL/DL configuration specifies transmission directions of subframes in a radio frame.
5. An evolved node B (eNB) comprising:
a processor; and
memory in electronic communication with the processor, wherein instructions stored in the memory are executable to:
transmit, using a transmitter, a physical downlink control channel (PDCCH) indicating an actual TDD UL/DL configuration in a serving cell;
determine a downlink (DL)-reference TDD UL/DL configuration of the serving cell, wherein the DL-reference TDD UL/DL configuration is configured in a user equipment (UE) based on a DL-reference TDD UL/DL configuration configured based on radio resource control (RRC) signaling and a UL/DL configuration that the UE has dynamically received on the PDCCH; and
determine an uplink (UL)-reference TDD UL/DL configuration of the serving cell, wherein
the DL-reference TDD UL/DL configuration and the UL-reference TDD UL/DL configuration are configured, in a user equipment (UE), based on higher layer signaling,
the DL-reference TDD UL/DL configuration is used for Physical Downlink Shared Channel (PDSCH) operations, and
the UL-reference TDD UL/DL configuration is used for Physical Uplink Shared Channel (PUSCH) operations.
6. The UE of claim 5 , wherein the UL-reference TDD UL/DL configuration is configured, in the UE, based on system information block (SIB).
7. The UE of claim 5 , wherein the PDCCH indicating the actual TDD UL/DL configuration in a next radio frame.
8. The UE of claim 5 , wherein the actual TDD UL/DL configuration specifies transmission directions of subframes in a radio frame.
9. A method for a user equipment (UE), the method comprising:
receiving a physical downlink control channel (PDCCH) indicating an actual TDD UL/DL configuration in a serving cell;
configuring a downlink (DL)-reference TDD UL/DL configuration of the serving cell based on a DL-reference TDD UL/DL configuration configured based on radio resource control (RRC) signaling and a UL/DL configuration that the UE has dynamically received on the PDCCH; and
configuring an uplink (UL)-reference TDD UL/DL configuration of the serving cell, wherein
the DL-reference TDD UL/DL configuration and the UL-reference TDD UL/DL configuration are configured based on higher layer signaling,
the DL-reference TDD UL/DL configuration is used for Physical Downlink Shared Channel (PDSCH) operations, and
the UL-reference TDD UL/DL configuration is used for Physical Uplink Shared Channel (PUSCH) operations.
10. A method for an evolved node B (eNB), the method comprising:
transmitting a physical downlink control channel (PDCCH) indicating an actual TDD UL/DL configuration in a serving cell;
determining a downlink (DL)-reference TDD UL/DL configuration of the serving cell, wherein the DL-reference TDD UL/DL configuration is configured in a user equipment (UE) based on a DL-reference TDD UL/DL configuration configured based on radio resource control (RRC) signaling and a UL/DL configuration that the UE has dynamically received on the PDCCH; and
determining an uplink (UL)-reference TDD UL/DL configuration of the serving cell, wherein
the DL-reference TDD UL/DL configuration and the UL-reference TDD UL/DL configuration are configured, in a user equipment (UE), based on higher layer signaling,
the DL-reference TDD UL/DL configuration is used for Physical Downlink Shared Channel (PDSCH) operations, and
the UL-reference TDD UL/DL configuration is used for Physical Uplink Shared Channel (PUSCH) operations.