CD-ASM: A new queuing paradigm to overcome bufferbloat effects in HetNets
Benevid Felix, Aldri Luiz dos Santos, Burak Kantarcı, Michele Nogueira · 2017
Recent works have sought to improve network performance by employing Multipath Transmission Control Protocol (MPTCP) to aggregate flows from heterogeneous wireless interfaces in a single connection. Although existing proposals are powerful, coupled congestion control algorithms suffer from high variation in path delays, bandwidth and loss rate, typical issues on heterogeneous wireless networks. Such variations are even higher over concurrent multipath transmissions, and they are enhanced in presence of bufferbloat, i.e. high delays caused by long queues. Hence, to cope with this limitation, we propose a major shift from the Active Queue Management (AQM) concept to Active Stack Management (ASM) concept, namely Controlled Delay ASM (CD-ASM) for HetNets to handle with the dropped packet ratio in the MPTCP congestion control mechanism. Differently from other approaches, CD-ASM gives priority to the most recent packets, being a promising solution. Moreover, we provide a detailed simulation analysis over congestion control algorithms by comparing CD-ASM to CoDel and DropTail schemes. Results indicate that our proposal reduces queue drops, and thus diminishing the impact on congestion control; keeping RTT low and improving in 20% the goodput.