USRE49263EActiveUtility
Method and apparatus for transmitting control information in a wireless communication system
Est. expiryJan 17, 2030(~3.5 yrs left)· nominal 20-yr term from priority
H04W 72/21H04L 27/2602H04J 11/0069H04L 27/2697H04W 4/00H04L 5/0026H04L 5/0094H04L 27/2636H04L 5/001H04L 5/0055H04L 5/0053H04W 72/02H04W 72/0413H04L 5/0016
83
PatentIndex Score
2
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48
References
22
Claims
Abstract
The present invention relates to a wireless communication system. More specifically, the present invention relates to a method for transmitting control signal via a PUCCH in a wireless communication system, and to an apparatus for the method, wherein the method comprises the following steps: joint-coding a plurality of pieces of control information to obtain a single codeword; obtaining a first modulation symbol sequence from the single codeword; obtaining, from the first modulation symbol sequence, a plurality of second modulation symbol sequences corresponding to each slot in the PUCCH; cyclically shifting the plurality of second modulation symbol sequences in a time domain to obtain a plurality of third modulation symbol sequences; performing a discrete Fourier transform (DFT) precoding process on the plurality of third modulation symbol sequences to obtain a plurality of complex symbol sequences in a frequency domain; and transmitting the plurality of complex symbol sequences via the PUCCH.
Claims
exact text as granted — not AI-modifiedThe invention claimed is:
1. A method for transmitting control information through a physical uplink control channel (PUCCH) at a user equipment (UE) in a wireless communication system, the method comprising:
modulating control information bits to generate N 1 modulation symbols, wherein N 1 is twice of a number of subcarriers in one resource block (RB);
block-wise multiplying the first N 1 /2 modulation symbols of the N 1 modulation symbols by each element of a first orthogonal code of spreading factor M−1 to generate a first plurality of sequences, wherein M is a plural number;
block-wise multiplying the second N 1 /2 modulation symbols of the N 1 modulation symbols by each element of a second orthogonal code of spreading factor M−1 to generate a second plurality of sequences; and
transmitting the first and second plurality of sequences in a subframe,
wherein each sequence of the first plurality of sequences is mapped to a corresponding single carrier frequency division multiple access (SC-FDMA) symbol in a 1 st slot of the subframe, and each sequence of the second plurality of sequences is mapped to a corresponding SC-FDMA symbol in a 2 nd slot of the subframe, wherein each sequence of the first and second plurality of sequences is includes a respective discrete fourier Fourier transformed sequence.
2. The method of claim 1 , wherein the first N 1 /2 modulation symbols are the first half of the N 1 modulation symbols, and the second N 1 /2 modulation symbols are the second half of the N 1 modulation symbols.
3. The method of claim 1 , wherein the first orthogonal code and the second orthogonal code are independently determined for each slot.
4. The method of claim 1 , wherein indexes of the SC-FDMA symbols, through which the first plurality of sequences are transmitted, in slot 0 are 0, 2, 3, 4 and 6 in a normal cyclic prefix (CP) case and 0, 1, 2, 4 and 5 in an extended CP case, and the first orthogonal code of spreading factor M is selected from the following table:
[1 1 1 1 1]
[1 e j2π/5 e j4π/5 e j6π/5 e j8π/5 ]
[1 e j4π/5 e j8π/5 e j2π/5 e j6π/5 ]
[1 e j6π/5 e j2π/5 e j8π/5 e j4π/5 ]
[1 e j8π/5 e j6π/5 e j4π/5 e j2π/5 ].
5. The method of claim 1 , wherein indexes of the SC-FDMA symbols, through which the second plurality of sequences are transmitted, in slot 1 are 0, 2, 3 and 4 in a normal cyclic prefix (CP) case and 0, 1, 2 and 4 in an extended CP case, and the second orthogonal code of spreading factor M−1 is selected from the following table:
[1 1 1 1]
[1 −1 1 −1]
[1 1 −1 −1]
[1 −1 −1 1].
6. The method of claim 1 , wherein the control information bits include multiple ACK/NACK information for a plurality of downlink data.
7. An User equipment (UE) configured to transmit control information through a PUCCH in a wireless communication system, the UE comprising:
a radio frequency (RF) unit; and
a processor,
wherein the processor is configured to:
a modulator configured to modulate control information bits to generate N 1 modulation symbols, wherein N 1 is twice of a number of sub-carriers in one resource block (RB),
a spreader configured to block-wise multiply the first N 1 /2 modulation symbols of the N 1 modulation symbols by each element of a first orthogonal code of spreading factor M to generate a first plurality of sequences, wherein M is a plural number,
the spreader configured to block-wise multiply the second N 1 /2 modulation symbols of the N 1 modulation symbols by each element of a second orthogonal code of spreading factor M−1 to generate second plurality of sequences, and
a transmitter configured to transmit the first and second plurality of sequences onin a subframe, each sequence of the first plurality of sequences is mapped to a corresponding single carrier frequency division multiple access (SC-FDMA) symbol in a 1 st slot of the subframe, and each sequence of the second plurality of sequences is mapped to a corresponding SC-FDMA symbol in a 2 nd slot of the subframe, wherein each sequence of the first and second plurality of sequences isincludes a respective discrete fourierFourier transformed sequence.
8. The UE of claim 7 , wherein the first N 1 /2 modulation symbols are the first half of the N 1 modulation symbols, and the second N 1 /2 modulation symbols are the second half of the N 1 modulation symbols.
9. The UE of claim 7 , wherein the first orthogonal code and the second orthogonal code are independently determined for each slot.
10. The UE of claim 7 , wherein indexes of the SC-FDMA symbols, through which the first plurality of sequences are transmitted, in slot 0 are 0, 2, 3, 4 and 6 in a normal cyclic prefix (CP) case and 0, 1, 2, 4 and 5 in an extended CP case, and the first orthogonal code of spreading factor M is selected from the following table:
[1 1 1 1 1]
[1 e j2π/5 e j4π/5 e j6π/5 e j8π/5 ]
[1 e j4π/5 e j8π/5 e j2π/5 e j6π/5 ]
[1 e j6π/5 e j2π/5 e j8π/5 e j4π/5 ]
[1 e j8π/5 e j6π/5 e j4π/5 e j2π/5 ].
11. The UE of claim 7 , wherein indexes of the SC-FDMA symbols, through which the second plurality of sequences are transmitted, in slot 1 are 0, 2, 3 and 4 in a normal cyclic prefix (CP) case and 0, 1, 2 and 4 in an extended CP case, and the second orthogonal code of spreading factor M−1 is selected from the following table:
[1 1 1 1]
[1 −1 1 −1]
[1 1 −1 −1]
[1 −1 −1 1].
12. The UE of claim 7 , wherein the control information bits include multiple ACK/NACK information for a plurality of downlink data.
13. The method of claim 1, wherein M is same as a number of SC-FDMA symbols to which for the first plurality of sequences is mapped.
14. The UE of claim 7, wherein M is same as a number of SC-FDMA symbols to which for the first plurality of sequences is mapped.
15. A method for a device to transmit control information in a wireless communication system, the method comprising:
modulating control information to provide N modulation symbols; spreading a block of modulation symbols using an orthogonal sequence with a spreading factor M to provide a length-L spread modulation symbol sequence, wherein the block of modulation symbols includes L/M modulation symbols among the N modulation symbols, and L is a number of subcarriers in a resource block (RB); discrete fourier transforming the length-L spread modulation symbol sequence to provide a length-L complex-valued symbol sequence; and transmitting the length-L complex-valued symbol sequence through a corresponding one of single carrier frequency division multiple access (SC-FDMA) symbols for a physical uplink control channel (PUCCH).
16. The method of claim 15, wherein M is 2.
17. The method of claim 15, wherein L is 12.
18. The method of claim 15, wherein the control information includes multiple ACK/NACKs for a plurality of data.
19. A device for use in a wireless communication system, the device comprising:
a modulator configured to modulate control information to provide N modulation symbols, a spreader configured to spread a block of modulation symbols using an orthogonal sequence with a spreading factor M to provide a length-L spread modulation symbol sequence, wherein the block of modulation symbols includes L/M modulation symbols among the N modulation symbols, and L is a number of subcarriers in a resource block (RB), a precoder configured to discrete fourier transform the length-L spread modulation symbol sequence to provide a length-L complex-valued symbol sequence, and a transmitter configured to transmit the length-L complex-valued symbol sequence through a corresponding one of single carrier frequency division multiple access (SC-FDMA) symbols for a physical uplink control channel (PUCCH).
20. The device of claim 19, wherein M is 2.
21. The device of claim 19, wherein L is 12.
22. The device of claim 19, wherein the control information includes multiple ACK/NACKs for a plurality of data.Join the waitlist — get patent alerts
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