Information transmission method and device

A receiving device, wherein the receiving device is applied to data transmission in a preset spectrum, the preset spectrum is a spectrum that occupies a spectrum resource for a limited time each time, and the receiving device comprises:

• a processor, a memory, a bus, and a receiver, wherein the processor, the memory, and the receiver are connected to each other by using the bus;
• the receiver is configured to receive a data scheduling instruction, which is sent by a network device, of a physical downlink control channel, wherein the data scheduling instruction of the physical downlink control channel comprises a preset field, and the preset field comprises one or more of a carrier indicator (CIF) field, a new data indicator (NDI) field, and a resource block assignment (RBA) field;
• the processor is configured to obtain a data retransmission identifier of a first carrier and determine whether the preset field comprises the data retransmission identifier of the first carrier;
• and
• the receiver is further configured to:
• when a determining result of the processor is that the preset field comprises the data retransmission identifier of the first carrier, receive data that is on the first carrier on a second carrier according to the data retransmission identifier of the first carrier.

An information transmission method, wherein the information transmission method is applied to data transmission by a network device in a preset spectrum, the preset spectrum is a spectrum that occupies a spectrum resource for a limited time each time, and the information transmission method comprises:

• writing, by the network device, a data retransmission identifier of a first carrier into a preset field of a physical downlink control channel, wherein the preset field comprises one or more of a carrier indicator (CIF) field, a new data indicator (NDI) field, and a resource block assignment (RBA) field, and the first carrier is a carrier in the preset spectrum;
• generating, by the network device, a data scheduling instruction of the physical downlink control channel, wherein the data scheduling instruction of the physical downlink control channel is used to instruct to retransmit data that is on the first carrier;
• sending, by the network device on a second carrier, the data scheduling instruction of the physical downlink control channel to a receiving device;
• and
• sending, by the network device, the data that is on the first carrier on the second carrier according to the data scheduling instruction of the physical downlink control channel.

An information transmission method, wherein the information transmission method is applied to data transmission by a receiving device in a preset spectrum, the preset spectrum is a spectrum that occupies a spectrum resource for a limited time each time, and the information transmission method comprises:

• receiving, by the receiving device, a data scheduling instruction, which is sent by the network device, of a physical downlink control channel, wherein the data scheduling instruction of the physical downlink control channel comprises a preset field, and the preset field comprises one or more of a carrier indicator (CIF) field, a new data indicator (NDI) field, and a resource block assignment (RBA) field;
• obtaining, by the receiving device, a data retransmission identifier of a first carrier and determining whether the preset field comprises the data retransmission identifier of the first carrier;
• and
• receiving, by the receiving device, data that is on the first carrier on a second carrier according to the data retransmission identifier of the first carrier if the preset field comprises the data retransmission identifier of the first carrier.