Fairness of Bandwidth Allocation in Broadband Networks

Fair Queueing and Rate-based Congestion Control are significant in supporting circuit mode and controlled-load services, respectively. The common design issue for them is the fairness of bandwidth allocation, making good separation between circuit mode applications and prevents the arguments of unfairness from packet mode applications. Based on Fair Queueing, Bounded Tag Fair Queueing (BTFQ) is proposed, performing better in bounded unfairness, bounded delay, and computation efficiency. Based on Rate-based Congestion Control, Weighted Max-min Fairness with Queue Control (WMFQC) is proposed. It guarantees minimum rates of flows and distributes the available bandwidth fairly to flows quickly.