Data transmission method and device

A data transmission device comprising:

• a process;
• and
• a memory configured to store instructions executable by the processor;
• wherein the process is configured to:
• execute the method of
• determining a preamble sequence, a physical random access channel PRACH time-frequency resource, a physical uplink shared channel PUSCH time-frequency resource set, and a mapping relationship between the preamble sequence and PUSCH time-frequency resources in the PUSCH time-frequency resource set, based on resource configuration information;
• transmitting the preamble sequence by using the PRACH time-frequency resource, and transmitting the data by using a PUSCH time-frequency resource determined from the preamble sequence and the mapping relationship;
• and
• detecting a random access response message MsgB in a random access response window;
• or execute the method of
• establishing resource configuration information including at least one of preamble sequences, physical random access channel PRACH time-frequency resources, a physical uplink shared channel PUSCH time-frequency resource set, or a mapping relationship between the preamble sequences and PUSCH time-frequency resources in the PUSCH time-frequency resource set, the resource configuration information configured to allocate transmission resources;
• and
• sending the resource configuration information.