Methods and system for communicating control information using carrier aggregation
An apparatus may include a radio frequency (RF) transceiver to receive a first message over a first carrier in a first band in a downlink sub-frame of a first radio frame in a communications link, where the communications link comprises interband carriers aggregated over primary and secondary cells. The apparatus may also include a processor and a reply message assignment module operable on the processor to determine a downlink sub-frame in which the downlink transmission is received and to adjust timing of a reply/acknowledge message to be sent by the RF transceiver in response to the first message so as to coincide with a predetermined uplink sub-frame of a radio frame. Other embodiments are described and claimed.
1. An apparatus, comprising: a memory; and logic for user equipment (UE), at least a portion of the logic comprised in circuitry coupled to the memory, the logic to:
identify an uplink (UL)/downlink (DL) configuration of a primary time division duplex (TDD) cell of the UE and a UL/DL configuration of a secondary TDD cell of the UE;
identify a subframe of a physical downlink shared channel (PDSCH) transmission of the secondary TDD cell, the PDSCH transmission to comprise data intended for the UE;
determine, based on the UL/DL configuration of the primary TDD cell, the UL/DL configuration of the secondary TDD cell, and the subframe of the PDSCH transmission, a UL subframe for transmission of a hybrid automatic repeat request (HARQ) response for the PDSCH transmission; and
generate the HARQ response for transmission over a physical uplink control channel (PUCCH) of the primary TDD cell during the UL subframe.
2. The apparatus of claim 1 , the logic to:
determine an adapted downlink association set based on the UL/DL configuration of the primary TDD cell and the UL/DL configuration of the secondary TDD cell; and
identify the UL subframe based on the adapted downlink association set and the subframe of the PDSCH transmission.
3. The apparatus of claim 1 , the primary TDD cell to use a component carrier of a first band, the secondary TDD cell to use a component carrier of a second band that differs from the first band.
4. The apparatus of claim 1 , the UL/DL configuration of the primary TDD cell to differ from the UL/DL configuration of the secondary TDD cell.
5. The apparatus of claim 1 , the UL subframe to comprise a common UL subframe of the primary TDD cell and the secondary TDD cell.
6. At least one non-transitory computer-readable storage medium comprising a set of instructions that, in response to being executed at user equipment (UE), cause the UE to:
identify an uplink (UL)/downlink (DL) configuration of a primary time division duplex (TDD) cell of the UE and a UL/DL configuration of a secondary TDD cell of the UE;
identify a subframe of a physical downlink shared channel (PDSCH) transmission of the secondary TDD cell, the PDSCH transmission to comprise data intended for the UE;
determine, based on the UL/DL configuration of the primary TDD cell, the UL/DL configuration of the secondary TDD cell, and the subframe of the PDSCH transmission, a UL subframe for transmission of a hybrid automatic repeat request (HARQ) response for the PDSCH transmission; and
generate the HARQ response for transmission over a physical uplink control channel (PUCCH) of the primary TDD cell during the UL subframe.
7. The at least one non-transitory computer-readable storage medium of claim 6 , comprising instructions that, in response to being executed at the UE, cause the UE to:
determine an adapted downlink association set based on the UL/DL configuration of the primary TDD cell and the UL/DL configuration of the secondary TDD cell; and
identify the UL subframe based on the adapted downlink association set and the subframe of the PDSCH transmission.
8. The at least one non-transitory computer-readable storage medium of claim 6 , the primary TDD cell to use a component carrier of a first band, the secondary TDD cell to use a component carrier of a second band that differs from the first band.
9. The at least one non-transitory computer-readable storage medium of claim 6 , the UL/DL configuration of the primary TDD cell to differ from the UL/DL configuration of the secondary TDD cell.
10. The at least one non-transitory computer-readable storage medium of claim 6 , the UL subframe to comprise a common UL subframe of the primary TDD cell and the secondary TDD cell.
11. User equipment (UE), comprising:
a memory;
logic, at least a portion of the logic comprised in circuitry coupled to the memory, the logic to:
identify an uplink (UL)/downlink (DL) configuration of a primary time division duplex (TDD) cell of the UE and a UL/DL configuration of a secondary TDD cell of the UE;
identify a subframe of a physical downlink shared channel (PDSCH) transmission of the secondary TDD cell, the PDSCH transmission to comprise data intended for the UE; and
determine, based on the UL/DL configuration of the primary TDD cell, the UL/DL configuration of the secondary TDD cell, and the subframe of the PDSCH transmission, a UL subframe for transmission of a hybrid automatic repeat request (HARD) response for the PDSCH transmission; and
a radio frequency (RF) transceiver to transmit the HARQ response over a physical uplink control channel (PUCCH) of the primary TDD cell during the UL subframe.
12. The UE of claim 11 , the logic to:
determine an adapted downlink association set based on the UL/DL configuration of the primary TDD cell and the UL/DL configuration of the secondary TDD cell; and
identify the UL subframe based on the adapted downlink association set and the subframe of the PDSCH transmission.
13. The UE of claim 11 , the primary TDD cell to use a component carrier of a first band, the secondary TDD cell to use a component carrier of a second band that differs from the first band.
14. The UE of claim 11 , the UL/DL configuration of the primary TDD cell to differ from the UL/DL configuration of the secondary TDD cell.
15. The UE of claim 11 , the UL subframe to comprise a common UL subframe of the primary TDD cell and the secondary TDD cell.