On TCP performance enhancing proxies in a wireless environment

Ivanovich, M.; Bickerdike, P.; Li, Jonathan C.

doi:10.1109/mcom.2008.4623710

Cited by 35 publications

(22 citation statements)

References 12 publications

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“…While we see many points along this line, we also observe points where G C < G S , indicating the presence of a proxy. This is not surprising, since the use of PEP is becoming a common practice for mobile operators trying to improve end-users' Quality-of-Experience [16], [17], [18].…”

Section: A Download Goodputmentioning

confidence: 99%

Speedtest-Like Measurements in 3G/4G Networks: The MONROE Experience

Khatouni

Mellia

Marsan

et al. 2017

2017 29th International Teletraffic Congress (ITC 29)

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Abstract-Mobile Broadband (MBB) Networks are evolving at a fast pace, with technology enhancements that promise drastic improvements in capacity, connectivity, coverage, i.e., better performance in general. But how to measure the actual performance of a MBB solution? In this paper, we present our experience in running the simplest of the performance test: "speedtestlike" measurements to estimate the download speed offered by actual 3G/4G networks. Despite their simplicity, download speed measurements in MBB networks are much more complex than in wired networks, because of additional factors (e.g., mobility of users, physical impairments, diversity in technology, operator settings, mobile terminals diversity, etc.).We exploit the MONROE open platform, with hundreds of multihomed nodes scattered in 4 different countries, and explicitly designed with the goal of providing hardware and software solutions to run large scale experiments in MBB networks. We analyze datasets collected in 4 countries, over 11 operators, from about 50 nodes, for more than 2 months. After designing the experiment and instrumenting both the clients and the servers with active and passive monitoring tools, we dig into collected data, and provide insight to highlight the complexity of running even a simple speedtest. Results show interesting facts, like the occasional presence of NAT, and of Performance Enhancing Proxies (PEP), and pinpoint the impact of different network configurations that further complicate the picture. Our results will hopefully contribute to the debate about performance assessment in MBB networks, and to the definition of much needed benchmarks for performance comparisons of 3G, 4G and soon of 5G networks.

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Section: A Download Goodputmentioning

confidence: 99%

Speedtest-Like Measurements in 3G/4G Networks: The MONROE Experience

Khatouni

Mellia

Marsan

et al. 2017

2017 29th International Teletraffic Congress (ITC 29)

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“…After [3,5,6,[9][10][11] proposed to decouple the packet loss recovery from the congestion/rate control, so CWnd/the transmission rate during the loss recovery phase, in this case, is only governed by the estimated bandwidth.…”

Section: Queue Length Adaptive Loss Recovery Algorithmmentioning

confidence: 99%

Optimizing TCP loss recovery performance over mobile data networks

Zha

Liu

et al. 2015

2015 12th Annual IEEE International Conference on Sensing, Communication, and Networking (SECON)

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-Recent advances in high-speed mobile networks have revealed new bottlenecks in ubiquitous TCP protocol deployed in the Internet. In addition to differentiating non-congestive loss from congestive loss, our experiments revealed two significant performance bottlenecks during the loss recovery phase: flow control bottleneck and application stall, resulting in degradation in QoS performance. To tackle these two problems we firstly develop a novel opportunistic retransmission algorithm to eliminate the flow control bottleneck, which enables TCP sender to transmit new packets even if receiver's receiving window is exhausted. Secondly, application stall can be significantly alleviated by carefully monitoring and tuning the TCP sending buffer growth mechanism. We implemented and modularized the proposed algorithms in the Linux kernel thus they can plug-and-play with the existing TCP loss recovery algorithms easily. Using emulated experiments we showed that, compared to the existing TCP loss recovery algorithms, the proposed optimization algorithms improve the bandwidth efficiency by up to 133% and completely mitigate RTT spikes, i.e., over 50% RTT reduction, over the loss recovery phase.

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“…Many research papers investigate the split connection TCP proxy concept applied in case of satellite links that have high RTT [8], ad-hoc networks with high bit error rate links [18], as well as in case of transport infrastructures for reliable overlay multicast networks [15]. Lately several studies investigate the potential benefits of using the split TCP concept in wireless [27,13,22] and in particular in cellular networks [14]. The authors in [19] give a comprehensive overview of split connection TCP proxies in Wideband Code Division Multiple Access networks and show that this solution can significantly improve the throughput of file downloads, while in [21] the performance (e.g., throughput, page download time) of Hypertext Transfer Protocol (HTTP) proxy and TCP proxy solutions is compared.…”

Section: Related Workmentioning

confidence: 99%

A Split Connection TCP Proxy in LTE Networks

Farkas

Héder

Nováczki

2012

Information and Communication Technologies

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Abstract. High quality and ubiquitous Internet access is a key feature of today's mobile systems such as LTE. While LTE can provide competitive peak data rates and a relatively low latency, there is still room for solutions improving end-users' Quality-of-Experience by optimizing services running over the LTE infrastructure. Being the most widespread transport protocol, TCP is in the main focus of such research projects. A widely recommended solution for TCP performance improvement is the split connection TCP proxy that divides the end-to-end TCP connection into two independent connections, that results increased throughput and faster error recovery. This paper investigates the performance of a split connection TCP proxy deployed in LTE's SAE-GW. Numerical results show significant performance improvement of file downloading, web browsing and video steaming applications in case of not congested transport networks.

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On TCP performance enhancing proxies in a wireless environment

Cited by 35 publications

References 12 publications

Speedtest-Like Measurements in 3G/4G Networks: The MONROE Experience

Speedtest-Like Measurements in 3G/4G Networks: The MONROE Experience

Optimizing TCP loss recovery performance over mobile data networks

A Split Connection TCP Proxy in LTE Networks

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