Abstract
A method and apparatus are described for a User Equipment (UE) to transmit in a control channel ACKnowledgement signals associated with a Hybrid Automatic Repeat reQuest process (HARQ-ACK signals) in response to receiving Transport Blocks (TBs) transmitted from a base station. The UE conveys the HARQ-ACK information by selecting one resource from multiple resources in the control channel and by selecting a constellation point of the modulation scheme for the HARQ-ACK signal. Transmission diversity is supported using different control channel resources that are already available to the UE without configuring additional resources. Design principles are described to optimally map the HARQ-ACK information to control channel resources and modulation constellation points for a Time Division Duplex (TDD) system and for a Frequency Division Duplex (FDD) system.
Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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4G | 20/01/2015 | ISLD-201501-011 | SAMSUNG | Yes | Basis Patent | ||||
5G | 25/04/2018 | ISLD-201804-027 | SAMSUNG | No | Family Member |
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Technologies
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Claim
1. A method for transmitting a Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK) signal in a communication system, the method comprising:
identifying transmission modes of at least two cells;
receiving at least one transport block on a Physical Downlink Shared CHannel (PDSCH) indicated by a corresponding Physical Downlink Control CHannel (PDCCH) in a cell of the at least two cells;
identifying a plurality of Physical Uplink Control CHannel (PUCCH) resources; and
transmitting at least one HARQ-ACK signal for the at least one transport block based on the plurality of PUCCH resources,
wherein the corresponding PDCCH comprises at least one Control Channel Element (CCE), and
wherein a first PUCCH resource of the plurality of PUCCH resources is defined based on a first CCE used for transmission of the corresponding PDCCH, and for the transmission mode that supports up to two transport blocks, and a second PUCCH resource of the plurality of PUCCH resources is defined based on CCE+1.
2. The method of claim 1, further comprising:
receiving at least one transport block on a PDSCH indicated by a corresponding PDCCH in another cell of the at least two cells.
3. The method of claim 1, wherein the cell of the at least two cells is a first cell.
4. The method of claim 2, further comprising:
identifying a third PUCCH resource and a fourth PUCCH resource for the another cell of the at least two cells.
5. The method of claim 1, wherein a HARQ-ACK state for the at least one HARQ-ACK signal for the at least one transport block is mapped to one of the plurality of PUCCH resources.
6. A method for receiving a Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK) signal in a communication system, the method comprising:
transmitting at least one transport block on a Physical Downlink Shared CHannel (PDSCH) indicated by a corresponding Physical Downlink Control CHannel (PDCCH) in a cell of at least two cells; and
receiving at least one HARQ-ACK signal for the at least one transport block based on a plurality of Physical Uplink Control CHannel (PUCCH) resources,
wherein the corresponding PDCCH comprises at least one Control Channel Element (CCE), and
wherein a first PUCCH resource of the plurality of PUCCH resources is defined based on a first CCE used for transmission of the corresponding PDCCH, and for a transmission mode that supports up to two transport blocks, and a second PUCCH resource of the plurality of PUCCH resources is defined based on CCE+1.
7. The method of claim 6, further comprising:
transmitting at least one transport block on a PDSCH indicated by a corresponding PDCCH in another cell of the at least two cells.
8. The method of claim 6, wherein the cell of the at least two cells is a first cell.
9. The method of claim 6, wherein a HARQ-ACK state for the at least one HARQ-ACK signal for the at least one transport block is mapped to one of the plurality of PUCCH resources.
10. An apparatus for transmitting a Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK) signal in a communication system, the apparatus comprising:
a processor configured to identify transmission modes of at least two cells, and identify a plurality of Physical Uplink Control CHannel (PUCCH) resources;
a receiver configured to receive at least one transport block on a Physical Downlink Shared CHannel (PDSCH) indicated by a corresponding Physical Downlink Control CHannel (PDCCH) in a cell of the at least two cells; and
a transmitter configured to transmit at least one HARQ-ACK signal for the at least one transport block based on the plurality of PUCCH resources,
wherein the corresponding PDCCH comprises at least one Control Channel Element (CCE), and
wherein a first PUCCH resource of the plurality of PUCCH resources is defined based on a first CCE used for transmission of the corresponding PDCCH, and for the transmission mode that supports up to two transport blocks, and a second PUCCH resource of the plurality of PUCCH resources is defined based on CCE+1.
11. The apparatus of claim 10, wherein the receiver receives at least one transport block on a PDSCH indicated by a corresponding PDCCH in another cell of the at least two cells.
12. The apparatus of claim 10, wherein the cell of the at least two cells is a first cell.
13. The apparatus of claim 11, wherein the processor identifies a third PUCCH resource and a fourth PUCCH resource for the another cell of the at least two cells.
14. The apparatus of claim 10, wherein a HARQ-ACK state for the at least one HARQ-ACK signal for the at least one transport block is mapped to one of the plurality of PUCCH resources.
15. An apparatus for receiving a Hybrid Automatic Repeat reQuest-ACKnowledgement (HARQ-ACK) signal in a communication system, the apparatus comprising:
a transmitter configured to transmit at least one transport block on a Physical Downlink Shared CHannel (PDSCH) indicated by a corresponding Physical Downlink Control CHannel (PDCCH) in a cell of at least two cells; and
a receiver configured to receive at least one HARQ-ACK signal for the at least one transport block based on a plurality of Physical Uplink Control CHannel (PUCCH) resources,
wherein the corresponding PDCCH comprises at least one Control Channel Element (CCE), and
wherein a first PUCCH resource of the plurality of PUCCH resources is defined based on a first CCE used for transmission of the corresponding PDCCH, and for a transmission mode that supports up to two transport blocks, and a second PUCCH resource of the plurality of PUCCH resources is defined based on CCE+1.
16. The apparatus of claim 15, wherein the transmitter transmits at least one transport block on a PDSCH indicated by a corresponding PDCCH in another cell of the at least two cells.
17. The apparatus of claim 15, wherein the cell of the at least two cells is a first cell.
18. The apparatus of claim 15, wherein a HARQ-ACK state for the at least one HARQ-ACK signal for the at least one transport block is mapped to one of the plurality of PUCCH resources.
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