Bandwidth allocation by optimal contention window setting for IEEE 802.11 EDCA
IEEE 802.11 EDCA带宽分配控制的竞争窗口优化

IEEE 802.11 Enhanced Distributed Channel Access (EDCA) provides the QoS enhancement to support priority-based service differentiation for different types of traffic. This paper focus onto the problem how to yield the maximum aggregate throughput while maintaining the weighted proportional bandwidth differentiation among different traffic classes by optimal contention window settings. Two approximate computation methods are proposed to acquire the optimal transmitting probability, which is then used to find optimal contention window settings further. Through validation by numeric evaluation and simulation, the results are proved to be very close to the theoretical value, and the optimal contention window settings can effectively optimize the throughput performance of the whole network.