Combining scheduling and congestion control for fair resource allocation in WLAN
调度和拥塞控制相结合的无线网络资源分配模型

In this paper, focusing the attention mainly on the downlink traffic, the authors presented a scheduler based on queue length at base station and a congestion control scheme based on the wireless channel. The scheduler scheduled flows proportionally to their backlogged queue length, meanwhile made its best effort to flows with the QoS requirement. Flows that have a higher arrival rate were more probable to be chosen, which lead to a fair resource allocation of the total bandwidth. The authors used the link utilization as the congestion indicator and fed it back to the sender to adjust the sending rate, hence realized congestion control. The link utilization was computed by the channel busy time at a predefined time period. The simulation results verify our analysis that our scheduler and congestion control scheme allocate the resource at a considerable fairness degree.