Method, apparatus and system for transmitting data carrying indication information

Provided are a method, apparatus and system for transmitting data carrying indication information. The method comprises: a sending end node generating an indication frame; and the sending end node sending the indication frame to a receiving end node, wherein the indication frame comprises available channel indication information, or idle bandwidth information. By means of the present invention, a receiving end node is capable of directly receiving indication frames sent by a plurality of sending end nodes, without needing to gradually receive indication information sent by the plurality of sending end nodes any longer, thereby greatly reducing the transmission overhead.