Slotted nonpersistent CSMA with an adaptive array and canceling signal

We propose a slotted nonpersistent CSMA with an adaptive array and a canceling signal to improve the throughput performance. In the proposed model, the base station transmits a canceling signal to each terminal when the channel is wasted by the interfering packets. The terminals cancel transmitted interfering packets as soon as the terminals receive the canceling signal. We evaluate the throughput S and the average number of transmissions and schedulings G/S by a theoretical analysis and computer simulation. It is shown that the proposed model attains a higher S and a smaller G/S than the conventional slotted nonpersistent CSMA with an adaptive array