Improving TFRC Performance against Bandwidth Change during Handovers

Li, Dagang; Sleurs, K.; Lil, Emmanuel Van; Capelle, Antoine Van de

doi:10.1109/wicom.2008.1072

Cited by 6 publications

(3 citation statements)

References 13 publications

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“…In [16] authors proposed an enhanced queue management scheme for TFRC to reduce packet loss and to increase the throughput of bursty traffic. In [17], the authors proposed an enhancement to TFRC that uses a self-clocking mechanism to eliminate packet loss during bandwidth decreased handover. In [18], the authors proposed two strategies called bandwidth estimation method and new slow start mechanism to enhance the performance of TFRC in the view of bandwidth allocation among multiple flows and packet losses caused by over shooting.…”

Section: Literature Surveymentioning

confidence: 99%

Efficient Traffic Engineering Strategies for Improving the Performance of TCP Friendly Rate Control Protocol

Reddy

Padmavathamma

2017

Future Internet

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Multimedia services will play a prominent role in the next generation of internet. With increasing real time requirements, internet technology has to provide Quality of Service (QoS) for various kinds of real time streaming services. When the bandwidth required exceeds the available network resources, network paths can get congested, which results in a delay in packet delivery and packet loss. This situation leads to the design of new strategies for congestion avoidance and control. One of the popular and appropriate congestion control mechanisms that is useful in transmitting multimedia applications in the transport layer is TCP Friendly Rate Control Protocol (TFRC). However, TFRC still suffers from packet loss and delay due to long distance heavy traffic and network fluctuations. This paper introduces a number of key concerns like enhanced Round Trip Time (RTT) and Retransmission Time Out (RTO) calculations, Enhanced Average Loss Interval (ALI) methods and improved Time to Live (TTL) features are applied to TFRC to enhance the performance of TFRC over wired networks.

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Section: Literature Surveymentioning

confidence: 99%

Efficient Traffic Engineering Strategies for Improving the Performance of TCP Friendly Rate Control Protocol

Reddy

Padmavathamma

2017

Future Internet

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“…High-to-low capacity changes are addressed in [43] which proposes some self-clocking à la TCP to avoid overloading a slow or congested link. A more aggressive extension is also proposed in [44]. To accomodate for intermitent traffic without unduly limiting the rate, a faster restart has also been proposed for TFRC [45], which probes the network more aggressively under the assumption that its condition might not have changes much since the last estimate.…”

Section: Adapatability To Changes Of Network Characteristicsmentioning

confidence: 99%

Rate Control Adaptation for Heterogeneous Handovers

Mehani,

Boreli,

Jourjon

et al. 2013

Preprint

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We present enhancements to the TCP-Friendly Rate Control mechanism (TFRC) designed to better handle the intermittent connectivity occurring in mobility situations. Our aim is to quickly adapt to new network conditions and better support real-time applications for which the user-perceived quality depends on the immediate transmission rate. We propose to suspend the transmission before disconnections occur, in a way inspired by Freeze-TCP, and extend the solution by probing the network after reconnecting to enable full use of the newly available capacity.We first introduce a numerical model of TFRC's performance after a network handover and use it to evaluate the potential performance gains for realistic network parameters. We then describe a set of additions to TFRC to achieve these gains. Implementations within the Datagram Congestion Control Protocol (DCCP) for ns-2 and Linux have been adapted to support these enhancements. Comparisons of experimental results for the original and modified DCCP are presented for a number of example mobility scenarios.We thus show how the proposed modifications enable faster recovery after disconnected periods as well as significantly improved adjustments to the newly available network conditions and an improvement in the quality of experience (QoE) for video-streaming applications.

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“…This assumption is typical for horizontal handovers, but it is also possible during a vertical one, due to QoS methods such as reservation, prioritization, resource allocation, or even due to the competition from cross traffic. The study on bandwidth change is presented in [7]. The rest of the paper is organized as follows.…”

Section: Introductionmentioning

confidence: 99%

Fast link adaptation for TFRC after a handover

Sleurs

Lil

et al. 2008

2008 IEEE 19th International Symposium on Personal, Indoor and Mobile Radio Communications

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Abstract-TCP-Friendly Rate Control(TFRC) is an equationbased congestion control mechanism that competes fairly with TCP but has a much lower throughput variation, which makes it a better choice for streaming over the Internet. It is known that in a mobile network environment, after a handover TFRC can overshoot or underutilize the new link if the conditions there differ from those of the old link. There are different factors that affect the TFRC performance during a handover. In this paper we focus on the impact of the change in the round trip time, an aspect that is largely overlooked in the literature compared with bandwidth disparity. We find that even if the same bandwidth is assured on the new link, changes in the link latency will still cause TFRC performance degradation after the handover. A fast link adaptation mechanism is thus proposed to address the problem. Simulations show that this mechanism helps TFRC to adjust quickly to the new link without consecutive packet loss or longtime bandwidth underutilization.

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Improving TFRC Performance against Bandwidth Change during Handovers

Cited by 6 publications

References 13 publications

Efficient Traffic Engineering Strategies for Improving the Performance of TCP Friendly Rate Control Protocol

Efficient Traffic Engineering Strategies for Improving the Performance of TCP Friendly Rate Control Protocol

Rate Control Adaptation for Heterogeneous Handovers

Fast link adaptation for TFRC after a handover

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