| 主权项 |
1. A network device, wherein the network 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 network device comprises: a processor, a memory, a bus, and a transmitter, wherein the processor, the memory, and the transmitter are connected to each other by using the bus;
the processor is configured to write 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; the processor is further configured to generate 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; the transmitter is configured to send, on a second carrier, the data scheduling instruction of the physical downlink control channel to a receiving device; and the transmitter is further configured to send the data that is on the first carrier on the second carrier according to the data scheduling instruction of the physical downlink control channel. |
