Data transmission method and apparatus

Embodiments of the present invention provide a data transmission method and apparatus. First information is sent to a UE, the first information comprising a first correspondence; a second correspondence is generated according to data of a to-be-sent MBMS in a first scheduling period, the second correspondence being a correspondence of a service identifier of the to-be-sent MBMS in the first scheduling period and an LCH ID; and the second correspondence and the data of the to-be-sent MBMS are sent to the UE through an MCH. In this way, the utilization rate of radio resources is improved.