Method and system for acknowledgment/negative acknowledgment feedback on physical uplink control channel

A method for feeding back an acknowledgement/negative-acknowledgement (ACK/NACK) on a physical uplink control channel, comprising:

• sending, by a user equipment, the ACK/NACK by adopting a manner based on a channel selection or based on a Discrete Fourier Transform spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) in a multiplexing mode according to a feedback rule in the multiplexing mode configured by a base station;
• wherein,
• the user equipment determines to send the ACK/NACK by adopting the manner based on the channel selection or based on the DFT-s-OFDM in the multiplexing mode, according to capability of the user equipment feeding back ACK/NACK and/or the number of bits of the ACK/NACK needed to be fed back according to the feedback rule in the multiplexing mode configured by the base station;
• wherein,
• the feedback rule in the multiplexing mode configured by the base station comprises:
• if the user equipment is only able to support to feed back the ACK/NACK in the manner based on the channel selection, then the user equipment sending the ACK/NACK by adopting the manner based on the channel selection in the multiplexing mode;
• if the user equipment is only able to support to feed back the ACK/NACK in the manner based on the DFT-s-OFDM, then the user equipment sending the ACK/NACK by adopting the manner based on the DFT-s-OFDM in the multiplexing mode;
• if the user equipment is able to support to feed back the ACK/NACK not only in the manner based on the channel selection but also in the manner based on the DFT-s-OFDM, then the user equipment determining to send the ACK/NACK by adopting the manner based on the channel selection or based on the DFT-s-OFDM in the multiplexing mode according to the number of bits of the ACK/NACK needed to be fed back.

A user equipment, comprising a feedback manner determination unit and an acknowledgement/negative-acknowledgement (ACK/NACK) feedback unit, wherein:

• the feedback manner determination unit is configured to:
• determine to send an ACK/NACK by adopting a manner based on a channel selection or based on a Discrete Fourier Transform spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) in a multiplexing mode according to a feedback manner in the multiplexing mode configured by a base station;
• and
• the ACK/NACK feedback unit is configured to:
• send the ACK/NACK by adopting the manner based on the channel selection or based on the DFT-s-OFDM in the multiplexing mode;
• wherein,
• the ACK/NACK feedback unit comprises a channel selection sending module and/or a DFT-s-OFDM sending module, and wherein:
• the channel selection sending module is configured to:
• send the ACK/NACK by adopting the manner based on the channel selection;
• and
• the DFT-s-OFDM sending module is configured to:
• send the ACK/NACK by adopting the manner based on the DFT-s-OFDM;
• the channel selection sending module is further configured to carry out the following judgment and processing on the ACK/NACK needed to be fed back before sending the ACK/NACK:
• when a number of bits of the ACK/NACK needed to be fed back exceeds N, then a logic AND operation between codeword streams is carried out on the ACK/NACK of each downlink component carrier at first;
• and
• if the number of bits needed to be fed back still exceeds N after the logic AND operation between the codeword streams is carried out, then a logic AND operation between component carriers is carried out on the ACK/NACK of each component carrier after the logic AND operation between the codeword streams is carried out.

A user equipment, comprising a feedback manner determination unit and an acknowledgement/negative-acknowledgement (ACK/NACK) feedback unit, wherein:

• the feedback manner determination unit is configured to:
• determine to send an ACK/NACK by adopting a manner based on a channel selection or based on a Discrete Fourier Transform spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) in a multiplexing mode according to a feedback manner in the multiplexing mode configured by a base station;
• and
• the ACK/NACK feedback unit is configured to:
• send the ACK/NACK by adopting the manner based on the channel selection or based on the DFT-s-OFDM in the multiplexing mode;
• wherein,
• the feedback manner determination unit is configured to:
• determine to send the ACK/NACK by adopting the manner based on the channel selection or based on the DFT-s-OFDM in the multiplexing mode according to capability of the user equipment feeding back ACK/NACK and/or the number of bits of the ACK/NACK needed to be fed back according to the feedback rule in the multiplexing mode configured by the base station;
• wherein,
• the feedback rule in the multiplexing mode configured by the base station comprises:
• if the user equipment is only able to support to feed back the ACK/NACK in the manner based on the channel selection, then the user equipment sending the ACK/NACK by adopting the manner based on the channel selection in the multiplexing mode;
• if the user equipment is only able to support to feed back the ACK/NACK in the manner based on the DFT-s-OFDM, then the user equipment sending the ACK/NACK by adopting the manner based on the DFT-s-OFDM in the multiplexing mode;
• if the user equipment is able to support to feed back the ACK/NACK not only in the manner based on the channel selection but also in the manner based on the DFT-s-OFDM, then the user equipment determining to send the ACK/NACK by adopting the manner based on the channel selection or based on the DFT-s-OFDM in the multiplexing mode according to the number of bits of the ACK/NACK needed to be fed back.

A base station, comprising a feedback manner configuration unit or a feedback rule configuration unit, wherein,

• the feedback manner configuration unit is configured to:
• configure a feedback manner in a multiplexing mode for a user equipment, and indicate the user equipment, through a higher layer signaling, to send an acknowledgement/negative-acknowledgement (ACK/NACK) by adopting a manner based on a channel selection or based on a Discrete Fourier Transform spread Orthogonal Frequency Division Multiplexing (DFT-s-OFDM) in the multiplexing mode;
• wherein the feedback manner configuration unit is configured to configure the feedback manner in the multiplexing mode for the user equipment according to the following manners:
• if the user equipment is only able to support to feed back the ACK/NACK in the manner based on the channel selection, then indicating the user equipment to send the ACK/NACK by adopting the manner based on the channel selection in the multiplexing mode;
• if the user equipment is only able to support to feed back the ACK/NACK in the manner based on the DFT-s-OFDM, then indicating the user equipment to send the ACK/NACK by adopting the manner based on the DFT-s-OFDM in the multiplexing mode;
• if the user equipment is able to support to feed back the ACK/NACK not only in the manner based on the channel selection but also in the manner based on the DFT-s-OFDM, then indicating the user equipment to send the ACK/NACK by adopting the manner based on the channel selection or based on the DFT-s-OFDM;
• the feedback rule configuration unit is configured to:
• configure a feedback rule in a multiplexing mode for a user equipment, and indicate the user equipment, to determine to send the ACK/NACK by adopting a manner based on a channel selection or based on a DFT-s-OFDM in the multiplexing mode according to capability of the user equipment feeding back ACK/NACK and/or the number of bits of the ACK/NACK needed to be fed back according to the feedback rule, wherein the feedback rule in the multiplexing mode configured by the feedback rule configuration unit for the user equipment comprises:
• if the user equipment is only able to support to feed back the ACK/NACK in the manner based on the channel selection, then the user equipment sending the ACK/NACK by adopting the manner based on the channel selection in the multiplexing mode;
• if the user equipment is only able to support to feed back the ACK/NACK in the manner based on the DFT-s-OFDM, then the user equipment sending the ACK/NACK by adopting the manner based on the DFT-s-OFDM in the multiplexing mode;
• if the user equipment is able to support to feed back the ACK/NACK not only in the manner based on the channel selection but also in the manner based on the DFT-s-OFDM, then the user equipment determining to send the ACK/NACK by adopting the manner based on the channel selection or based on the DFT-s-OFDM in the multiplexing mode according to the number of bits of the ACK/NACK needed to be fed back.