Research of Real-Time WLAN MAC Protocol

Proposed a modified WLAN MAC protocol, to lower real-time data access delay of control system. Data transported through the control system of WLAN included: burst real-time data (BRD), periodical real-time date (PRD) and non-real-time data (NRD). Priority ranged from the high level to the low level and distinguished them by different inter frame space (IFS). Presents boundary backoff and polling algorithm to avoid collide of real-time data, which guaranteed the bound of real-time access delay. Simulation and analysis show the performance of the modified MAC excels the standard MAC in real-time access delay.