At present, the global growth of communication needs makes us more efficient in using of the frequency spectrum. Assuming that at one frequency there is an opportunity to transmit several mutual interference signals at one time, the problem is the separation of these signals. But, complexity of demodulation procedures has significantly increased compared to the classical. Thus, we must determine whether a reasonable increase of complexity and how will increase the throughput of some communication system. In researching we will choose carrier sense multiple access protocol.