FIG. 6 is a schematic diagram of a data transmission burst. In LAA-LTE, data transmission is opportunistic. One time of continuous data transmission is one burst data transmission, the burst data transmission includes multiple subframes, and the multiple subframes include a complete subframe and a partial subframe. The control information may be carried in any subframe in the burst data transmission. The burst data transmission herein refers to a time range within which the first cell can transmit data without using a contention based mechanism such as an LBT mechanism after the first cell preempts an unlicensed frequency band resource. It should be noted that, in this embodiment of the present invention, that the control information is carried in a subframe refers to that the control information is sent by using time and frequency resources included in the subframe.
FIG. 7 is a schematic diagram of a time range, corresponding to one burst data transmission of a first cell, of a second cell according to an embodiment of the present invention. More generally, the first information may be carried in another subframe of the second cell, and the another subframe may indicate a status of one or more subframes in one burst data transmission of the first cell.
