Performance Evaluation of Control Method to Guarantee Throughput Based on Media Access Control SP-MAC over WLAN

Wireless local area networks (WLANs) based on IEEE802.11 usually uses CSMA/CA for a media access control. In the CSMA/CA, it is known that data frame collisions often occur if the number of wireless terminals increases. This issue causes the degradation of the total throughput of terminals connected to the same Access Point (AP). To solve this problem, a media access control method based on synchronization phenomena of coupled oscillators (SP-MAC) has been proposed. SP-MAC can avoid data frame collisions drastically and improve the throughput compared with CSMA/CA. Additionally, we have proposed a control method to guarantee throughput based on SP-MAC. However, because the previous study evaluated only the basic performance, the evaluation of the control method was not sufficient. Thus, this study evaluates the control method to guarantee throughput based on SP-MAC considering the propagation delay. From the simulation results, we found that the control method can secure the throughput if the propagation delay is less than 100ms.