Grant-free transmission method, terminal device, and network device

A grant-free transmission method comprising:

• detecting, by a network device, a sequence sent by a terminal device;
• determining, by the network device, based on the detected sequence, information about a target time-frequency resource used for a grant-free transmission;
• and
• detecting, by the network device, on the target time-frequency resource, uplink data sent by the terminal device.

A terminal device comprising:

• a determining unit configured to:
• determine a target time-frequency resource used for a grant-free transmission from a plurality of time-frequency resources;
• and
• determine, based on information about the target time-frequency resource and a correspondence between a time-frequency resource and a sequence, a sequence corresponding to the target time-frequency resource;
• and
• a transmission unit configured to perform the grant-free transmission with a network device on the target time-frequency resource based on the sequence that is determined by the determining unit and that is corresponding to the target time-frequency resource.