TECHNICAL FIELD

This disclosure relates to the field of communication, and more particularly to methods for uplink feedback information transmission, a terminal device, and a network device.

BACKGROUND

In the related art, acknowledgment (ACK)/negative acknowledgement (NACK) feedback resources corresponding to physical downlink shared channels (PDSCH) scheduled by different transmission/reception points (TRP) may be allocated to the same time-domain resource, for example, the same ACK/NACK feedback resource, or different ACK/NACK feedback resources on the same time-domain resource.

If a backhaul between TRPs is ideal, the terminal device can multiplex multiple pieces of ACK/NACK information and transmit the multiplexed information to the same TRP on one ACK/NACK feedback resource, and TRPs can quickly exchange ACK/NACK information. If the backhaul between TRPs is non-ideal, the terminal device cannot multiplex the multiple pieces of ACK/NACK information, and instead, the terminal device can only report one of the multiple pieces of ACK/NACK information. Since the terminal device has no idea of a backhaul condition of a network side, the terminal device does not know how to report multiple pieces of ACK/NACK information on the same time-domain resource.

SUMMARY

In a first aspect, a method for uplink feedback information transmission is provided. The method includes the following. A terminal device receives first downlink data and second downlink data, where a first ACK/NACK resource corresponding to first ACK/NACK information of the first downlink data and a second ACK/NACK resource corresponding to second ACK/NACK information of the second downlink data occupy the same time-domain resource. The terminal device transmits the first ACK/NACK information and/or the second ACK/NACK information on the time-domain resource.

In a second aspect, a terminal device is provided. The terminal device is configured to perform the method described in the first aspect or in any other implementation of the first aspect. The terminal device includes functional modules for performing the method described in the first aspect or in any other implementation of the first aspect.

In a third aspect, a network device is provided. The network device includes a memory configured to store computer programs and a processor. The processor is configured to invoke and execute the computer programs stored in the memory, to perform: transmitting first downlink data to a terminal device, wherein the first downlink data corresponds to first ACK/NACK information; determining according to a backhaul connection delay, whether multiplex transmission of the first ACK/NACK information and second ACK/NACK information is supported, wherein the second ACK/NACK information corresponds to second downlink data transmitted by a second network device, and the first ACK/NACK information and the second ACK/NACK information occupy the same time-domain resource; transmitting multiplex indication information to the terminal device, wherein the multiplex indication information is used for the terminal device to determine whether multiplex transmission of the first ACK/NACK information and the second ACK/NACK information is supported.

