This application provides an information transmission method and apparatus. The method includes: determining, by a control device, a first transmission channel in at least one transmission channel configured between a first network device and a second network device, where the first transmission channel is used to transmit a packet that belongs to at least one packet flow, a packet sending frequency currently supported by the first transmission channel is greater than or equal to a sum of packet sending frequencies of the at least one packet flow, and transmission performance of the first transmission channel meets transmission performance of the at least one packet flow; and sending, by the control device, first identification information to the first network device, where the first identification information is used to identify the first transmission channel. Therefore, this helps to meet a requirement for transmission performance of a packet in a mobile network.