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.
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4G | 24/10/2011 | ISLD-201110-007 | SAMSUNG | No | Family Member | ||||
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Technologies
Product
User Equipment (UE/Terminal)
Use Cases
Services
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 a first cell and a second cell in frequency division duplex (FDD);
receiving one or more transport blocks by at least one of a physical downlink shared channel (PDSCH) transmission on the first cell or a PDSCH transmission on the second cell;
determining a physical uplink control channel (PUCCH) resource; and
transmitting the HARQ-ACK signal for the one or more transport blocks on the PUCCH resource,
wherein the PUCCH resource is selected from a plurality of PUCCH resources, the plurality of PUCCH resources are associated with the transmission modes of the first cell and the second cell,
wherein at least one of the plurality of PUCCH resources for at least one of the PDSCH transmissions is determined based on at least one of physical downlink control channels (PDCCHs) corresponding to the at least one of the PDSCH transmissions, respectively, and
wherein the HARQ-ACK signal transmitted on the selected PUCCH resource denotes at least one of acknowledgement (ACK), negative acknowledgement (NACK), or discontinuous transmission (DTX) response for each of the one or more transport blocks.
2. The method of claim 1, wherein the plurality of PUCCH resources comprise a first PUCCH resource for the PDSCH transmission on the first cell,
wherein a PDCCH on the first cell comprises at least one control channel element (CCE), and
wherein the first PUCCH resource for the PDSCH transmission on the first cell is identified based on a first CCE used for transmission of the corresponding PDCCH and based on a value configured by higher layers.
3. The method of claim 2, wherein a transmission mode of the first cell supports up to two transport blocks,
wherein the plurality of PUCCH resources comprise the first PUCCH resource and a second PUCCH resource for PDSCH transmission on the first cell, and
wherein the second PUCCH resource for the PDSCH transmission on the first cell is identified based on the first CCE+1.
4. The method of claim 1, wherein the plurality of PUCCH resources comprise a first PUCCH resource and a second PUCCH resource for the PDSCH transmission on the second cell,
wherein a PDCCH on the second cell comprises downlink control information (DCI), and
wherein the first PUCCH resource and the second PUCCH resource for the PDSCH transmission on the second cell for a transmission mode of the second cell that supports up to two transport blocks, are determined based on the DCI of the corresponding PDCCH and based on a value configured by higher layers.
5. The method of claim 1, wherein a number of the plurality of PUCCH resources is one of 2, 3 or 4.
6. The method of claim 5, wherein the PUCCH resource is selected according to a format configured based on the ACK, NACK, or DTX response for the each of the one or more transport blocks and based on the number of the plurality of PUCCH resources.
7. The method of claim 1, wherein the HARQ-ACK signal is transmitted by a constellation point on the PUCCH resource.
8. The method of claim 7, wherein the constellation point is mapped to the ACK, NACK, or DTX response for the each of the one or more transport blocks.
9. A method for receiving a hybrid automatic repeat request-acknowledgement (HARQ-ACK) signal in a communication system, the method comprising:
transmitting one or more transport blocks by at least one of a physical downlink shared channel (PDSCH) transmission on a first cell or a PDSCH transmission on a second cell; and
receiving the HARQ-ACK signal for the one or more transport blocks on a physical uplink control channel (PUCCH) resource,
wherein the PUCCH resource is selected from a plurality of PUCCH resources, the plurality of PUCCH resources are associated with transmission modes of the first cell and the second cell,
wherein at least one of the plurality of PUCCH resources for at least one of the PDSCH transmissions is determined based on at least one of physical downlink control channels (PDCCHs) corresponding to the at least one of the PDSCH transmissions, respectively, and
wherein the HARQ-ACK signal received on the selected PUCCH resource denotes at least one of acknowledgement (ACK), negative acknowledgement (NACK), or discontinuous transmission (DTX) response for each of the one or more transport blocks.
10. The method of claim 9, wherein the plurality of PUCCH resources comprise a first PUCCH resource for the PDSCH transmission on the first cell,
wherein a PDCCH on the first cell comprises at least one control channel element (CCE), and
wherein the first PUCCH resource for the PDSCH transmission on the first cell is identified based on a first CCE used for transmission of the corresponding PDCCH and based on a value configured by higher layers.
11. The method of claim 10, wherein a transmission mode of the first cell supports up to two transport blocks,
wherein the plurality of PUCCH resources comprise the first PUCCH resource and a second PUCCH resource for PDSCH transmission on the first cell, and
wherein the second PUCCH resource for the PDSCH transmission on the first cell is identified based on the first CCE+1.
12. The method of claim 9, wherein the plurality of PUCCH resources comprise a first PUCCH resource and a second PUCCH resource for the PDSCH transmission on the second cell,
wherein a PDCCH on the second cell comprises downlink control information (DCI), and
wherein the first PUCCH resource and the second PUCCH resource for the PDSCH transmission on the second cell for a transmission mode of the second cell that supports up to two transport blocks, are determined based on the DCI of the corresponding PDCCH and based on a value configured by higher layers.
13. The method of claim 9, wherein a number of the plurality of PUCCH resources is one of 2, 3 or 4.
14. The method of claim 13, wherein the PUCCH resource is selected according to a format configured based on the ACK, NACK, or DTX response for the each of the one or more transport blocks and based on the number of the plurality of PUCCH resources.
15. The method of claim 9, wherein the HARQ-ACK signal is received by a constellation point on the PUCCH resource.
16. The method of claim 15, wherein the constellation point is mapped to the ACK, NACK, or DTX response for the each of the one or more transport blocks.
17. 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 a first cell and a second cell in frequency division duplex (FDD), and
determine a physical uplink control channel (PUCCH) resource;
a receiver configured to receive one or more transport blocks by at least one of a physical downlink shared channel (PDSCH) transmission on the first cell or a PDSCH transmission on the second cell; and
a transmitter configured to transmit the HARQ-ACK signal for the one or more transport blocks on the PUCCH resource,
wherein the PUCCH resource is selected from a plurality of PUCCH resources, the plurality of PUCCH resources are associated with the transmission modes of the first cell and the second cell,
wherein at least one of the plurality of PUCCH resources for at least one of the PDSCH transmissions is determined based on at least one of physical downlink control channels (PDCCHs) corresponding to the at least one of the PDSCH transmissions, respectively, and
wherein the HARQ-ACK signal transmitted on the selected PUCCH resource denotes at least one of acknowledgement (ACK), negative acknowledgement (NACK), or discontinuous transmission (DTX) response for each of the one or more transport blocks.
18. The apparatus of claim 17, wherein the plurality of PUCCH resources comprise a first PUCCH resource for the PDSCH transmission on the first cell,
wherein a PDCCH on the first cell comprises at least one control channel element (CCE), and
wherein the first PUCCH resource for the PDSCH transmission on the first cell is identified based on a first CCE used for transmission of the corresponding PDCCH and based on a value configured by higher layers.
19. The apparatus of claim 18, wherein a transmission mode of the first cell supports up to two transport blocks, and
wherein the plurality of PUCCH resources comprise the first PUCCH resource and a second PUCCH resource for PDSCH transmission on the first cell, and
wherein the second PUCCH resource for the PDSCH transmission on the first cell is identified based on the first CCE+1.
20. The apparatus of claim 17, wherein the plurality of PUCCH resources comprise a first PUCCH resource and a second PUCCH resource for the PDSCH transmission on the second cell,
wherein a PDCCH on the second cell comprises downlink control information (DCI), and
wherein the first PUCCH resource and the second PUCCH resource for the PDSCH transmission on the second cell for a transmission mode of the second cell that supports up to two transport blocks, are determined based on the DCI of the corresponding PDCCH and based on a value configured by higher layers.
21. The apparatus of claim 17, wherein a number of the plurality of PUCCH resources is one of 2, 3 or 4.
22. The apparatus of claim 21, wherein the PUCCH resource is selected according to a format configured based on the ACK, NACK, or DTX response for the each of the one or more transport blocks and based on the number of the plurality of PUCCH resources.
23. The apparatus of claim 17, wherein the HARQ-ACK signal is transmitted by a constellation point on the PUCCH resource.
24. The apparatus of claim 23, wherein the constellation point is mapped to the ACK, NACK, or DTX response for the each of the one or more transport blocks.
25. 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 one or more transport blocks by at least one of a physical downlink shared channel (PDSCH) transmission on a first cell or a PDSCH transmission on a second cell; and
a receiver configured to receive the HARQ-ACK signal for the one or more transport blocks on a physical uplink control channel (PUCCH) resource,
wherein the PUCCH resource is selected from a plurality of PUCCH resources, the plurality of PUCCH resources are associated with transmission modes of the first cell and the second cell,
wherein at least one of the plurality of PUCCH resources for at least one of the PDSCH transmissions is determined based on at least one of physical downlink control channels (PDCCHs) corresponding to the at least one of the PDSCH transmissions respectively, and
wherein the HARQ-ACK signal received on the selected PUCCH resource denotes at least one of acknowledgement (ACK), negative acknowledgement (NACK), or discontinuous transmission (DTX) response for each of the one or more transport blocks.
26. The apparatus of claim 25, wherein the plurality of PUCCH resources comprise a first PUCCH resource for the PDSCH transmission on the first cell,
wherein a PDCCH on the first cell comprises at least one control channel element (CCE), and
wherein the first PUCCH resource for the PDSCH transmission on the first cell is identified based on a first CCE used for transmission of the corresponding PDCCH and based on a value configured by higher layers.
27. The apparatus of claim 26, wherein a transmission mode of the first cell supports up to two transport blocks, and
wherein the plurality of PUCCH resources comprise the first PUCCH resource and a second PUCCH resource for PDSCH transmission on the first cell, and
wherein the second PUCCH resource for the PDSCH transmission on the first cell is identified based on the first CCE+1.
28. The apparatus of claim 25, wherein the plurality of PUCCH resources comprise a first PUCCH resource and a second PUCCH resource for the PDSCH transmission on the second cell,
wherein a PDCCH on the second cell comprises downlink control information (DCI), and
wherein the first PUCCH resource and the second PUCCH resource for the PDSCH transmission on the second cell for a transmission mode of the second cell that supports up to two transport blocks, are determined based on the DCI of the corresponding PDCCH and based on a value configured by higher layers.
29. The apparatus of claim 25, wherein a number of the plurality of PUCCH resources is one of 2, 3 or 4.
30. The apparatus of claim 29, wherein the PUCCH resource is selected according to a format configured based on the ACK, NACK, or DTX response for the each of the one or more transport blocks and based on the number of the plurality of PUCCH resources.
31. The apparatus of claim 25, wherein the HARQ-ACK signal is received by a constellation point on the PUCCH resource.
32. The apparatus of claim 31, wherein the constellation point is mapped to the ACK, NACK, or DTX response for the each of the one or more transport blocks.
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