Uplink control channel for acknowledging increased number of downlink component carriers
AssigneeQUALCOMM Incorporated
InventorsPeter Gaal, Wanshi Chen, Jelena Damnjanovic, Hao Xu, Madhavan Srinivasan Vajapeyam
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Abstract
Techniques are described for wireless communication. One method includes determining, based at least in part on a number of downlink component carriers (CCs) scheduled for a user equipment (UE) during a reporting interval, a number of bits to be included in a physical uplink control channel (PUCCH) acknowledgement/non-acknowledgement (ACK/NAK) payload for the reporting interval; and selecting, based at least in part on the determined number of bits, a format of the PUCCH ACK/NAK payload.
Claims24
A method of wireless communication, comprising:
- selecting a format of a physical uplink control channel (PUCCH) based at least on a size of an acknowledgement/non-acknowledgement (ACK/NAK) payload, wherein the format comprises a number of symbol periods;
- spreading modulation symbols of the ACK/NAK payload by a spreading factor of two within a symbol period of the PUCCH of the selected format, wherein the PUCCH of the selected format occupies one resource block in frequency;
- applying Discrete Fourier Transform (DFT) to the spread modulation symbols;
- and transmitting the PUCCH to a base station based on the spread modulation symbols with the DFT applied.
A user equipment (UE), comprising:
- a processor configured to:
- select a format of a physical uplink control channel (PUCCH) based at least on a size of an acknowledgement/non-acknowledgement (ACK/NAK) payload, wherein the format comprises a number of symbol periods;
- spread modulation symbols of the ACK/NAK payload by a spreading factor of two within a symbol period of the PUCCH of the selected format, wherein the PUCCH of the selected format occupies one resource block in frequency;
- and
- apply Discrete Fourier Transform (DFT) to the spread modulation symbols;
- and
- a transmitter configured to transmit the PUCCH to a base station based on the spread modulation symbols with the DFT applied.
An apparatus of wireless communication, comprising:
- means for selecting a format of a physical uplink control channel (PUCCH) based at least on a size of an acknowledgement/non-acknowledgement (ACK/NAK) payload, wherein the format comprises a number of symbol periods;
- means for spreading modulation symbols of the ACK/NAK payload by a spreading factor of two within a symbol period of the PUCCH of the selected format, wherein the PUCCH of the selected format occupies one resource block in frequency;
- means for applying Discrete Fourier Transform (DFT) to the spread modulation symbols;
- and
- means for transmitting the PUCCH to a base station based on the spread modulation symbols with the DFT applied.
A non-transitory computer-readable medium having instructions stored thereon, the instructions comprising codes executable for an apparatus to perform:
- selecting a format of a physical uplink control channel (PUCCH) based at least on a size of an acknowledgement/non-acknowledgement (ACK/NAK) payload, wherein the format comprises a number of symbol periods;
- spreading modulation symbols of the ACK/NAK payload by a spreading factor of two within a symbol period of the PUCCH of the selected format, wherein the PUCCH of the selected format occupies one resource block in frequency;
- applying Discrete Fourier Transform (DFT) to the spread modulation symbols;
- and
- transmitting the PUCCH to a base station based on the spread modulation symbols with the DFT applied.
Dependencies are inferred from the claim text.