Method for uplink data transmission, terminal device and network device

An uplink data transmission method, comprising:

• receiving, by a network device, information that is used to request a grant-free transmission resource and that is sent by a terminal device;
• and
• sending, by the network device, resource indication information to the terminal device, wherein the resource indication information is used to indicate a grant-free transmission resource that is allocated by the network device to the terminal device according to the information used to request the grant-free transmission resource;
• wherein the receiving, by the network device, information that is used to request the grant-free transmission resource and that is sent by the terminal device comprises:
• receiving, by the network device, a first random access preamble sequence sent by the terminal device, wherein the first random access preamble sequence belongs to a first random access preamble sequence group, the first random access preamble sequence group is used to request the grant-free transmission resource, and the first random access preamble sequence group comprises at least one random access preamble sequence.

A terminal device, wherein the terminal device comprises a processor, a memory, a transmitter, and a receiver, wherein

• the transmitter invokes a program stored in the memory, so as to send, to a network device, information used to request a grant-free transmission resource;
• the receiver invokes a program stored in the memory, so as to receive resource indication information sent by the network device, wherein the resource indication information is used to indicate a grant-free transmission resource that is allocated by the network device to the terminal device according to the information that is used to request the grant-free transmission resource and that is sent by the transmitter;
• and the processor invokes a program stored in the memory, so as to determine, according to the resource indication information received by the receiver, the transmission resource used for performing grant-free transmission;
• wherein the transmitter is specifically configured to:
• send a first random access preamble sequence, to request the grant-free transmission resource from the network device, wherein the first random access preamble sequence belongs to a first random access preamble sequence group, the first random access preamble sequence group is used to request the grant-free transmission resource, and the first random access preamble sequence group comprises at least one random access preamble sequence.

A network device, wherein the network device comprises a transmitter and a receiver, wherein

• the receiver is configured to receive information that is used to request a grant-free transmission resource and that is sent by a terminal device;
• the transmitter is configured to send resource indication information to the terminal device, wherein the resource indication information is used to indicate a grant-free transmission resource that is allocated by the network device to the terminal device according to the information that is used to request the grant-free transmission resource and that is received by the receiver;
• wherein the receiver is specifically configured to:
• receive a first random access preamble sequence sent by the terminal device, wherein the first random access preamble sequence belongs to a first random access preamble sequence group, the first random access preamble sequence group is used to request the grant-free transmission resource, and the first random access preamble sequence group comprises at least one random access preamble sequence.