Data transmission method, apparatus, and system

A data transmission method, comprising:

• receiving, by a terminal, a grouping instruction from a base station, wherein the grouping instruction is used to group, in a preset grouping manner, terminals in a cell in which the terminal is located into N groups, wherein totally or partially different resources are allocated to terminals in different groups of the N groups, wherein a resource corresponding to an ith group of the N groups is used by a terminal in the ith group in uplink non-scheduled transmission, N is an integer greater than 1, and i is a positive integer less than or equal to N;
• determining, by the terminal based on the preset grouping manner, a target group to which the terminal belongs;
• determining, by the terminal, a target resource from a resource corresponding to the target group;
• and
• sending, by the terminal, data to the base station using the target resource.

A base station, comprising a processor, a transmitter, and a receiver;

• and
• wherein the processor is configured to:
• send a grouping instruction to a target terminal by the transmitter, wherein the grouping instruction is used to group, in a preset grouping manner, terminals in a cell in which the target terminal is located into N groups, wherein totally or partially different resources are allocated to terminals in different groups of the N groups, wherein a resource corresponding to an ith group of the N groups is used by a terminal in the ith group in uplink non-scheduled transmission, N is an integer greater than 1, and i is a positive integer less than or equal to N;
• and receive, by the receiver, data that is sent by the target terminal using a target resource, wherein the target resource is a resource corresponding to a target group to which the target terminal belongs.

A terminal, comprising a processor, a receiver, and a transmitter;

• and
• wherein the processor is configured to receive, by the receiver, a grouping instruction from a base station, wherein the grouping instruction is used to group, in a preset grouping manner, terminals in a cell in which the terminal is located into N groups, wherein totally or partially different resources are allocated to terminals in different groups of the N groups, wherein a resource corresponding to an ith group of the N groups is used by a terminal in the ith group in uplink non-scheduled transmission, N is an integer greater than 1, and i is a positive integer less than or equal to N;
• determine, based on the preset grouping manner, a target group to which the terminal belongs;
• determine a target resource from a resource corresponding to the target group;
• and send, by the transmitter, data to the base station using the target resource.