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Will TCP Work in Low Latency Networks?

New York University Tandon School of Engineering.

Will TCP Work in Low Latency Networks?

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Will TCP Work in Low Latency Networks?
作者:	Zhang, Menglei.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, 2019
面頁冊數:	122 p.
附註:	Source: Dissertations Abstracts International, Volume: 81-03, Section: B.
附註:	Advisor: Rangan, Sundeep.
Contained By:	Dissertations Abstracts International81-03B.
標題:	Electrical engineering.
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=13881274
ISBN:	9781085635172

Will TCP Work in Low Latency Networks?
Zhang, Menglei.

Will TCP Work in Low Latency Networks? - Ann Arbor : ProQuest Dissertations & Theses, 2019 - 122 p.

Source: Dissertations Abstracts International, Volume: 81-03, Section: B.

Thesis (Ph.D.)--New York University Tandon School of Engineering, 2019.

This item must not be sold to any third party vendors.

The vast available spectrum in the millimeter wave (mmWave) bands offers the possibility of multi-Gbps data rates for fifth generation (5G) cellular networks. However, mmWave capacity can be highly intermittent due to the vulnerability of mmWave signals to blockages and delays in directional searching. Such highly variable links present unique challenges for adaptive control mechanisms in transport layer protocols and end-to-end applications. This work considers the fundamental question of whether TCP will work in mmWave cellular systems. Through comprehensive simulation study of TCP considering various factors, such as the congestion control algorithm, edge vs. remote servers, handover and multi-connectivity, TCP packet size and 3GPP-stack parameters, we show that the performance of TCP on mmWave links is highly dependent on the configuration of these parameters.Facing these new challenges, many new congestion controls have been proposed and some of them demonstrated promising improvements, such as BBR. In this work, we derive an analytic model for BBR's sending rate control that reveals the origin of its latency and fairness issue. We also improve BBR's algorithm for lower latency and improved fairness. Despite the improved performance, one concern of these new protocols is they may have problems coexisting with traditional TCP. Therefore, instead of proposing brand new algorithms, we introduce two enhancement features to the traditional TCP. The first one is a dynamic receive window algorithm that utilizes the cross-layer information to help TCP determining the sending rate without bandwidth probing. This feature dramatically improves the performance of TCP over bandwidth varying channels. The second enhancement uses linear regression to process the information that can be measured at TCP socket and predicts congestion events in the network. The sending rate is reduced if the predicted congestion probability is high, otherwise the Additive Increase and Multiplicative Decrease (AIMD) algorithm is used. In the future, we plan to extend this algorithm to other common TCP, such as CUBIC.

ISBN: 9781085635172Subjects--Topical Terms:

454503
Electrical engineering.

Will TCP Work in Low Latency Networks?
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520 $a The vast available spectrum in the millimeter wave (mmWave) bands offers the possibility of multi-Gbps data rates for fifth generation (5G) cellular networks. However, mmWave capacity can be highly intermittent due to the vulnerability of mmWave signals to blockages and delays in directional searching. Such highly variable links present unique challenges for adaptive control mechanisms in transport layer protocols and end-to-end applications. This work considers the fundamental question of whether TCP will work in mmWave cellular systems. Through comprehensive simulation study of TCP considering various factors, such as the congestion control algorithm, edge vs. remote servers, handover and multi-connectivity, TCP packet size and 3GPP-stack parameters, we show that the performance of TCP on mmWave links is highly dependent on the configuration of these parameters.Facing these new challenges, many new congestion controls have been proposed and some of them demonstrated promising improvements, such as BBR. In this work, we derive an analytic model for BBR's sending rate control that reveals the origin of its latency and fairness issue. We also improve BBR's algorithm for lower latency and improved fairness. Despite the improved performance, one concern of these new protocols is they may have problems coexisting with traditional TCP. Therefore, instead of proposing brand new algorithms, we introduce two enhancement features to the traditional TCP. The first one is a dynamic receive window algorithm that utilizes the cross-layer information to help TCP determining the sending rate without bandwidth probing. This feature dramatically improves the performance of TCP over bandwidth varying channels. The second enhancement uses linear regression to process the information that can be measured at TCP socket and predicts congestion events in the network. The sending rate is reduced if the predicted congestion probability is high, otherwise the Additive Increase and Multiplicative Decrease (AIMD) algorithm is used. In the future, we plan to extend this algorithm to other common TCP, such as CUBIC.
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