This invention provides one communication method, which is characterized by the following: at first and second load frequency and same time lag for upper and down transmission; the communication process is as: for first load frequency from start point ad processing upper transmission at first time lag and then for upper transmission at second time lag and then repeating upper and down transmission on time lag; for second load frequency from initial point, processing upper transmission at first time lae and processing down transmission at second time lag and then repeating upper and down transmission at back time lag.