Uplink information sending method and apparatus, downlink information sending method and apparatus, downlink information receiving method and apparatus and system scheduling method and apparatus

A method performed by a network device, the method comprising:

• determining time information indicating a time at which uplink information is sent, wherein the time information comprises an interval from a time at which reception of downlink data is complete to the time at which the uplink information is sent, and wherein the uplink information is used to indicate whether the downlink data is correctly received;
• determining a quantity of repetition times for sending the uplink information;
• sending a system message to a terminal device, wherein the system message carries information indicating the quantity of repetition times;
• sending downlink control information (DCI) to the terminal device, wherein the DCI includes scheduling information for transmission of the downlink data and carries the time information;
• sending the downlink data to the terminal device;
• and
• receiving the uplink information from the terminal device.

An apparatus, comprising:

• a processor;
• and
• a non-transitory computer readable storage medium storing a program for execution by the processor, the program including instructions for:
• obtaining downlink control information (DCI), wherein the DCI includes scheduling information for transmission of downlink data and carries time information indicating a time at which uplink information is sent, wherein the time information comprises an interval from a time at which the apparatus completes reception of the downlink data to the time at which the uplink information is sent, and wherein the uplink information indicates whether the apparatus receives the downlink data correctly;
• obtaining, through a system message, information indicating a quantity of repetition times for sending the uplink information;
• receiving the downlink data;
• and
• sending the uplink information according to the time information and the quantity of repetition times.

An apparatus, comprising:

• a processor;
• and
• a non-transitory computer readable storage medium storing a program for execution by the processor, the program including instructions for:
• determining time information indicating a time at which uplink information is sent, wherein the time information comprises an interval from a time at which reception of downlink data is complete to the time at which the uplink information is sent, and wherein the uplink information is used to indicate whether the downlink data is correctly received;
• determining a quantity of repetition times for sending the uplink information;
• sending a system message to a terminal device, wherein the system message carries information indicating the quantity of repetition times;
• sending downlink control information (DCI) to the terminal device, wherein the DCI includes scheduling information for transmission of the downlink data and carries the time information;
• and
• sending the downlink data to the terminal device;
• and
• receiving the uplink information from the terminal device.