A First Look at Disconnection-Centric TCP Performance on High-Speed Railways

Xu, Chenren; Wang, Jing; Ma, Zhiyao; Cheng, Yihua; Ni, Yunzhe; Li, Wangyang; Qian, Feng; Li, Yuanjie

doi:10.1109/jsac.2020.3005486

Cited by 12 publications

(2 citation statements)

References 33 publications

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“…Swapping networks brings additional complication. [47] notes that multipath TCP improves performance across cellular providers while [48] explored how different TCP variants improved performance over 4G in a high speed, multi provider scenario.…”

Section: Redundancy Setup For Cellular Servicesmentioning

confidence: 99%

DSM-MoC as Baseline: Reliability Assurance via Redundant Cellular Connectivity in Connected Cars

Obiodu

Abubakar

Mangiante

et al. 2022

IEEE Trans. Netw. Serv. Manage.

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Connected Cars (CCs) and vehicle-to-everything (V2X) use cases require stringent reliability for safety and non-safety uses. With increasing network softwarisation, it has become easier to use multiple, redundant connectivity options instead of relying on a single network connectivity. But where should these redundant connections be managed? Is it at a network provider's core network -i.e. supply side managed (SSM) -or at the CC -i.e. demand side managed (DSM)? In our work, we investigate the use of SSM and DSM for CCs on four separate days and across 800 kilometers of major / minor roads in South East England. For Day 1, we captured performance indicators, and determined hypothetical multi-operator configurations for four UK providers and a global Universal SIM. For Day 2, 3 & 4, we built and deployed a test-bed to actually implement network switching and understand performance (incl. for TCP & UDP) either on the road or in a stationary location. Based on our results, we make three contributions. First, we show that DSM can deliver superior performance for CCs more than any individual network (up to 28 percentage points in a hypothetical scenario), or SSM which had up to 4.8x longer page load times. Second, unlike other smartphone-only studies, our system-level study demonstrates that improvements of at least 12% can be obtained in a practical DSM field implementation for a CC. Third, we confirm that the advantage of DSM in a field implementation is higher for UDP traffic (23% better latency) compared to TCP (13%).

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Section: Redundancy Setup For Cellular Servicesmentioning

confidence: 99%

DSM-MoC as Baseline: Reliability Assurance via Redundant Cellular Connectivity in Connected Cars

Obiodu

Abubakar

Mangiante

et al. 2022

IEEE Trans. Netw. Serv. Manage.

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“…Conventionally, TCP assumes a packet drop as an indicator to congested situations but this might differ in 5G networks because different reasons such as blockage or environmental impacts can force random packet losses and degrade the protocol's performance [1], [2]. TCP's improper reaction to lossy wireless channels of 5G and assuming them as congestion indicators can strangle the TCP congestion window (cwnd) mistakenly and cause underutilization of the network's resources [12].…”

Section: Introductionmentioning

confidence: 99%

FB-TCP: A 5G mmWave Friendly TCP for Urban Deployments

Poorzare

Calveras

2021

IEEE Access

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5G era opens a new horizon toward communication with new features and capabilities. The new mobile generation comes up with a multi-gigabit per second data rate along with its huge available bandwidths provided by millimeter-wave frequency bands. Dispensing a fully connected world throughout low latency is the supreme aim for 5G networks. However, attaining high-speed, reliable communication is challenging in the new generation, especially in scenarios with numerous obstacles such as the urban one. As the frequency rises, the signal's penetration power declines, which can mislead TCP in adjusting the sending rate because TCP cannot distinguish that a packet drop in a network is due to congestion or other shortcomings of the network such as blockage or random packet drops. This paper proposes a new TCP based on Fuzzy logic, which strives to prevent performance reduction in urban deployments. The Fuzzy rules are implemented in the congestion avoidance phase of the new protocol to adjust the sending rate intelligently and prevent blockage impacts. The ultimate aim of the protocol is to control the sending rate based on the current situation of the network so it can attain the highest possible performance. Moreover, it tries to reach its goal through low latency and keep the average sending rate as small as possible to restrain the buffer exhaustion. The extensive conducted simulations showed that the newly proposed protocol could attain higher performance compared to BBR, HighSpeed, Cubic, and NewReno in terms of throughput, RTT, and sending rate adjustment in the urban scenario.

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TCP-LTE/5 G Cross-layer performance analysis tool for high mobility data networking and a case study on high-speed railway

Pan

et al. 2023

High-speed Railway

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A First Look at Disconnection-Centric TCP Performance on High-Speed Railways

Cited by 12 publications

References 33 publications

DSM-MoC as Baseline: Reliability Assurance via Redundant Cellular Connectivity in Connected Cars

DSM-MoC as Baseline: Reliability Assurance via Redundant Cellular Connectivity in Connected Cars

FB-TCP: A 5G mmWave Friendly TCP for Urban Deployments

TCP-LTE/5 G Cross-layer performance analysis tool for high mobility data networking and a case study on high-speed railway

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