Abstract
Provided are a method and an apparatus for transmitting a reception confirmation in a wireless system. A terminal determines at least one downlink sub-frame for ACK/NACK feedback from each of a plurality of serving cells and determines the number of ACK/NACK bits for the plurality of serving cells. The terminal generates bundled ACK/NACK bits by arraying the ACK/NACK bits in the ascending order of the cell index of the plurality of serving cells and transmits the bundled ACK/NACK bits.
| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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| Declaration Date | Declaration Reference | Declaring Company | Specification Number | ||||||
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| 4G | 08/07/2015 | ISLD-201507-021 | LG | No | Family Member | ||||
| 4G | 01/12/2016 | ISLD-201612-004 | LG |
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Yes | Basis Patent | |||
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Specification Information
Specification Information
Technologies
Family Information
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Yes | Family Member | |||
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Yes | Family Member | |||
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Resource configuration Feedback
Product
User Equipment (UE/Terminal)
Use Cases
Wireless communication
Services
Transmitting/receiving data in uplink
Claim
1. A method of transmitting a reception acknowledgement in a wireless communication system, comprising:
determining, by a user equipment (UE), a number of ACK/NACK bits for a plurality of serving cells and at least one downlink subframe for which the UE needs to feedback ACK/NACK in each of the plurality of serving cells;
generating, by the UE, combined ACK/NACK bits by arranging the ACK/NACK bits in ascending order of cell indexes of the plurality of serving cells;
generating, by the UE, encoded ACK/NACK bits by encoding the combined ACK/NACK bits;
generating, by the UE, ACK/NACK symbols by modulating the encoded ACK/NACK bits; and
transmitting, by the UE, the ACK/NACK symbols to a base station.', 'determining, by a user equipment (UE), a number of ACK/NACK bits for a plurality of serving cells and at least one downlink subframe for which the UE needs to feedback ACK/NACK in each of the plurality of serving cells;', 'generating, by the UE, combined ACK/NACK bits by arranging the ACK/NACK bits in ascending order of cell indexes of the plurality of serving cells;', 'generating, by the UE, encoded ACK/NACK bits by encoding the combined ACK/NACK bits;', 'generating, by the UE, ACK/NACK symbols by modulating the encoded ACK/NACK bits; and', 'transmitting, by the UE, the ACK/NACK symbols to a base station.
2. The method of claim 1, wherein the step of generating the combined ACK/NACK bits includes:
generating the combined ACK/NACK bits by arranging ACK/NACK bits for a first serving cell having a lowest cell index; and
appending ACK/NACK bits for a second serving cell having a cell index next to the lowest cell index at the end of the combined ACK/NACK bits.', 'generating the combined ACK/NACK bits by arranging ACK/NACK bits for a first serving cell having a lowest cell index; and', 'appending ACK/NACK bits for a second serving cell having a cell index next to the lowest cell index at the end of the combined ACK/NACK bits.
4. The method of claim 1, further comprising:
determining whether the number of ACK/NACK bits is greater than a specific value.', 'determining whether the number of ACK/NACK bits is greater than a specific value.
5. The method of claim 4, wherein if the number of ACK/NACK bits is greater than the specific value, spatial bundling in which a binary AND operation of ACK/NACK bits corresponding to at least two codewords in each subframe is performed is applied to all subframes in all serving cell.
6. The method of claim 1, wherein the wireless communication system is a time division duplex system.
7. The method of claim 1, wherein a number of bits for the encoded ACK/NACK bits is 48 and the encoded ACK/NACK bits are modulated by using quadrature phase shift keying (QPSK).
8. The method of claim 7, wherein the step of transmitting the ACK/NACK symbols includes:
spreading the ACK/NACK symbols with orthogonal sequences; and
transmitting the spread ACK/NACK symbols.', 'spreading the ACK/NACK symbols with orthogonal sequences; and', 'transmitting the spread ACK/NACK symbols.
9. A user equipment configured for transmitting a reception acknowledgement in a wireless communication system, comprising:
a radio frequency unit configured for transmitting a radio signal; and
a processor operatively coupled with the radio frequency unit and configured to:
determine a number of ACK/NACK bits for a plurality of serving cells and at least one downlink subframe for which the user equipment needs to feedback ACK/NACK in each of the plurality of serving cells;
generate combined ACK/NACK bits by arranging the ACK/NACK bits in ascending order of cell indexes of the plurality of serving cells;
generate encoded ACK/NACK bits by encoding the combined ACK/NACK bits;
generate ACK/NACK symbols by modulating the encoded ACK/NACK bits; and
transmit the ACK/NACK symbols to a base station.', 'a radio frequency unit configured for transmitting a radio signal; and', 'a processor operatively coupled with the radio frequency unit and configured to:', 'determine a number of ACK/NACK bits for a plurality of serving cells and at least one downlink subframe for which the user equipment needs to feedback ACK/NACK in each of the plurality of serving cells;', 'generate combined ACK/NACK bits by arranging the ACK/NACK bits in ascending order of cell indexes of the plurality of serving cells;', 'generate encoded ACK/NACK bits by encoding the combined ACK/NACK bits;', 'generate ACK/NACK symbols by modulating the encoded ACK/NACK bits; and', 'transmit the ACK/NACK symbols to a base station
10. The user equipment of claim 9, wherein the processor is configured to generate the combined ACK/NACK bits by:
generating the combined ACK/NACK bits by arranging ACK/NACK bits for a first serving cell having a lowest cell index; and
appending ACK/NACK bits for a second serving cell having a cell index next to the lowest cell index at the end of the combined ACK/NACK bits.', 'generating the combined ACK/NACK bits by arranging ACK/NACK bits for a first serving cell having a lowest cell index; and', 'appending ACK/NACK bits for a second serving cell having a cell index next to the lowest cell index at the end of the combined ACK/NACK bits
11. The user equipment of claim 10, wherein the lowest cell index is zero
12. The user equipment of claim 9, wherein the processor is configured to determine whether the number of ACK/NACK bits is greater than a specific value
13. The user equipment of claim 12, wherein if the number of ACK/NACK bits is greater than the specific value, spatial bundling in which a binary AND operation of ACK/NACK bits corresponding to at least two codewords in each subframe is performed is applied to all subframes in all serving cell
14. The user equipment of claim 9, wherein a number of bits for the encoded ACK/NACK bits is 48 and the encoded ACK/NACK bits are modulated by using quadrature phase shift keying (QPSK)
15. The user equipment of claim 14, wherein the processor is configured to transmit the ACK/NACK symbols by:
spreading the ACK/NACK symbols with orthogonal sequences; and
transmitting the spread ACK/NACK symbols.', 'spreading the ACK/NACK symbols with orthogonal sequences; and', 'transmitting the spread ACK/NACK symbols.']
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