Understanding bufferbloat in cellular networks

Authors:
Haiqing Jiang;Zeyu Liu;Yaogong Wang;Kyunghan Lee;Injong Rhee
Affiliations:
North Carolina State University, Raleigh, NC, USA;North Carolina State University, Raleigh, NC, USA;North Carolina State University, Raleigh, NC, USA;North Carolina State University, Raleigh, NC, USA;North Carolina State University, Raleigh, NC, USA
Venue:
Proceedings of the 2012 ACM SIGCOMM workshop on Cellular networks: operations, challenges, and future design
Year:
2012

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Abstract

Bufferbloat is a prevalent problem in the Internet where excessive buffers incur long latency, substantial jitter and sub-optimal throughput. This work provides the first elaborative understanding of bufferbloat in cellular networks. We carry out extensive measurements in the 3G/4G networks of the four major U.S. carriers to gauge the impact of bufferbloat in the field. Due to the bufferbloat problem, several pitfalls of current TCP protocols have been proposed in this paper. We also discover a trick employed by smart phone vendors to mitigate the issue and point out the limitations of such ad-hoc solutions. Our measurement study is coupled with theoretical analysis using queuing models. Finally, we comprehensively discuss candidate solutions to this problem and argue for a TCP-based end-to-end solution.