TY - GEN
T1 - Measurement, Modeling, and Analysis of TCP in High-Speed Mobility Scenarios
AU - Liu, Qingfang
AU - Xu, Ke
AU - Wang, Haiyang
AU - Shen, Meng
AU - Li, Li
AU - Xiao, Qingyang
PY - 2016/8/8
Y1 - 2016/8/8
N2 - The rapid growth of high-speed transit systems, such as High Speed Rail (HSR), is putting considerable pressure on TCP-based data transmission. It is well known that TCP is suffering from severe throughput degradation in high-speed mobility scenarios. The root cause at the transport layer however remains unclear and largely undetermined to date. In this paper, we aim to pinpoint the throughput bottlenecks and develop a throughput model to understand TCP in high-speed mobility environments. Based on the analysis of real-world HSR traces, we find that high-speed mobility will introduce significant challenges to the packet retransmission process after timeouts. And ACKs are more likely to trigger spurious retransmission timeouts in TCP flows in high-speed mobile environments. Such problems are not yet considered in the existing TCP models because classic timeouts can easily be recovered by retransmission in stationary scenarios. We therefore propose an enhanced TCP throughput model to integrate the above features. Our model analysis indicates that the optimization of TCP ACK latency is critical to obtain better throughput. Moreover, reliable retransmission mechanisms, e.g., multi-path TCP (MPTCP), can also bring notable benefits in high-speed mobility environments.
AB - The rapid growth of high-speed transit systems, such as High Speed Rail (HSR), is putting considerable pressure on TCP-based data transmission. It is well known that TCP is suffering from severe throughput degradation in high-speed mobility scenarios. The root cause at the transport layer however remains unclear and largely undetermined to date. In this paper, we aim to pinpoint the throughput bottlenecks and develop a throughput model to understand TCP in high-speed mobility environments. Based on the analysis of real-world HSR traces, we find that high-speed mobility will introduce significant challenges to the packet retransmission process after timeouts. And ACKs are more likely to trigger spurious retransmission timeouts in TCP flows in high-speed mobile environments. Such problems are not yet considered in the existing TCP models because classic timeouts can easily be recovered by retransmission in stationary scenarios. We therefore propose an enhanced TCP throughput model to integrate the above features. Our model analysis indicates that the optimization of TCP ACK latency is critical to obtain better throughput. Moreover, reliable retransmission mechanisms, e.g., multi-path TCP (MPTCP), can also bring notable benefits in high-speed mobility environments.
KW - high-speed mobility scenarios
KW - measurement
KW - modeling TCP throughput
UR - http://www.scopus.com/inward/record.url?scp=84985905608&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84985905608&partnerID=8YFLogxK
U2 - 10.1109/ICDCS.2016.43
DO - 10.1109/ICDCS.2016.43
M3 - Conference contribution
AN - SCOPUS:84985905608
T3 - Proceedings - International Conference on Distributed Computing Systems
SP - 629
EP - 638
BT - Proceedings - 2016 IEEE 36th International Conference on Distributed Computing Systems, ICDCS 2016
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 36th IEEE International Conference on Distributed Computing Systems, ICDCS 2016
Y2 - 27 June 2016 through 30 June 2016
ER -