A method of bandwidth dimensioning and management for aggregated TCP flows with heterogeneous access links

Ryoichi Kawahara, Keisuke Ishibashi, Tatsuya Mori, Toshihisa Ozawa, Shuichi Sumita, Takeo Abe

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

We propose a method of dimensioning and managing the bandwidth of a link on which flows arriving on access links that have heterogeneous bandwidths are aggregated. We start by developing a formula that approximates the mean TCP file-transfer time of a flow in such a situation. This only requires the bandwidth of the access link carrying the flow and the bandwidth and utilization of the aggregation link, each of which is easy to set or measure. We then extend the approximation to handle various factors that affect actual TCP behavior, such as round-trip time and restrictions other than the access-link bandwidth and congestion of the aggregation link in the end-to-end path of the flow. To do this, we define the virtual access-link bandwidth as the file-transfer speed of the flow when utilization of the aggregation link is negligibly small. We apply the virtual access-link bandwidth in the approximation to estimate the TCP performance of the flow with increasing utilization of the aggregation link. We use this method of estimation as the basis for a method of dimensioning the bandwidth of the link such that TCP performance is maintained and a method of managing bandwidth by comparing measured link utilization with the estimated threshold that indicates degradation of TCP performance. We also use simulation to analyze the accuracy of the estimates produced by our method.

Original languageEnglish
Title of host publicationNetworks 2004 - 11th International Telecommunications Network Strategy and Planning Symposium
EditorsH. Kaindl
Pages15-20
Number of pages6
Publication statusPublished - 2004
Externally publishedYes
EventNetworks 2004 - 11th International Telecommunications Network Startegy and Planning Symposium - Vienna
Duration: 2004 Jun 132004 Jun 16

Other

OtherNetworks 2004 - 11th International Telecommunications Network Startegy and Planning Symposium
CityVienna
Period04/6/1304/6/16

Fingerprint

Telecommunication links
Bandwidth
Agglomeration
Degradation

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Kawahara, R., Ishibashi, K., Mori, T., Ozawa, T., Sumita, S., & Abe, T. (2004). A method of bandwidth dimensioning and management for aggregated TCP flows with heterogeneous access links. In H. Kaindl (Ed.), Networks 2004 - 11th International Telecommunications Network Strategy and Planning Symposium (pp. 15-20)

A method of bandwidth dimensioning and management for aggregated TCP flows with heterogeneous access links. / Kawahara, Ryoichi; Ishibashi, Keisuke; Mori, Tatsuya; Ozawa, Toshihisa; Sumita, Shuichi; Abe, Takeo.

Networks 2004 - 11th International Telecommunications Network Strategy and Planning Symposium. ed. / H. Kaindl. 2004. p. 15-20.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Kawahara, R, Ishibashi, K, Mori, T, Ozawa, T, Sumita, S & Abe, T 2004, A method of bandwidth dimensioning and management for aggregated TCP flows with heterogeneous access links. in H Kaindl (ed.), Networks 2004 - 11th International Telecommunications Network Strategy and Planning Symposium. pp. 15-20, Networks 2004 - 11th International Telecommunications Network Startegy and Planning Symposium, Vienna, 04/6/13.
Kawahara R, Ishibashi K, Mori T, Ozawa T, Sumita S, Abe T. A method of bandwidth dimensioning and management for aggregated TCP flows with heterogeneous access links. In Kaindl H, editor, Networks 2004 - 11th International Telecommunications Network Strategy and Planning Symposium. 2004. p. 15-20
Kawahara, Ryoichi ; Ishibashi, Keisuke ; Mori, Tatsuya ; Ozawa, Toshihisa ; Sumita, Shuichi ; Abe, Takeo. / A method of bandwidth dimensioning and management for aggregated TCP flows with heterogeneous access links. Networks 2004 - 11th International Telecommunications Network Strategy and Planning Symposium. editor / H. Kaindl. 2004. pp. 15-20
@inproceedings{1e07d605d8a14f50b6622df8dceffcea,
title = "A method of bandwidth dimensioning and management for aggregated TCP flows with heterogeneous access links",
abstract = "We propose a method of dimensioning and managing the bandwidth of a link on which flows arriving on access links that have heterogeneous bandwidths are aggregated. We start by developing a formula that approximates the mean TCP file-transfer time of a flow in such a situation. This only requires the bandwidth of the access link carrying the flow and the bandwidth and utilization of the aggregation link, each of which is easy to set or measure. We then extend the approximation to handle various factors that affect actual TCP behavior, such as round-trip time and restrictions other than the access-link bandwidth and congestion of the aggregation link in the end-to-end path of the flow. To do this, we define the virtual access-link bandwidth as the file-transfer speed of the flow when utilization of the aggregation link is negligibly small. We apply the virtual access-link bandwidth in the approximation to estimate the TCP performance of the flow with increasing utilization of the aggregation link. We use this method of estimation as the basis for a method of dimensioning the bandwidth of the link such that TCP performance is maintained and a method of managing bandwidth by comparing measured link utilization with the estimated threshold that indicates degradation of TCP performance. We also use simulation to analyze the accuracy of the estimates produced by our method.",
author = "Ryoichi Kawahara and Keisuke Ishibashi and Tatsuya Mori and Toshihisa Ozawa and Shuichi Sumita and Takeo Abe",
year = "2004",
language = "English",
isbn = "3800728400",
pages = "15--20",
editor = "H. Kaindl",
booktitle = "Networks 2004 - 11th International Telecommunications Network Strategy and Planning Symposium",

}

TY - GEN

T1 - A method of bandwidth dimensioning and management for aggregated TCP flows with heterogeneous access links

AU - Kawahara, Ryoichi

AU - Ishibashi, Keisuke

AU - Mori, Tatsuya

AU - Ozawa, Toshihisa

AU - Sumita, Shuichi

AU - Abe, Takeo

PY - 2004

Y1 - 2004

N2 - We propose a method of dimensioning and managing the bandwidth of a link on which flows arriving on access links that have heterogeneous bandwidths are aggregated. We start by developing a formula that approximates the mean TCP file-transfer time of a flow in such a situation. This only requires the bandwidth of the access link carrying the flow and the bandwidth and utilization of the aggregation link, each of which is easy to set or measure. We then extend the approximation to handle various factors that affect actual TCP behavior, such as round-trip time and restrictions other than the access-link bandwidth and congestion of the aggregation link in the end-to-end path of the flow. To do this, we define the virtual access-link bandwidth as the file-transfer speed of the flow when utilization of the aggregation link is negligibly small. We apply the virtual access-link bandwidth in the approximation to estimate the TCP performance of the flow with increasing utilization of the aggregation link. We use this method of estimation as the basis for a method of dimensioning the bandwidth of the link such that TCP performance is maintained and a method of managing bandwidth by comparing measured link utilization with the estimated threshold that indicates degradation of TCP performance. We also use simulation to analyze the accuracy of the estimates produced by our method.

AB - We propose a method of dimensioning and managing the bandwidth of a link on which flows arriving on access links that have heterogeneous bandwidths are aggregated. We start by developing a formula that approximates the mean TCP file-transfer time of a flow in such a situation. This only requires the bandwidth of the access link carrying the flow and the bandwidth and utilization of the aggregation link, each of which is easy to set or measure. We then extend the approximation to handle various factors that affect actual TCP behavior, such as round-trip time and restrictions other than the access-link bandwidth and congestion of the aggregation link in the end-to-end path of the flow. To do this, we define the virtual access-link bandwidth as the file-transfer speed of the flow when utilization of the aggregation link is negligibly small. We apply the virtual access-link bandwidth in the approximation to estimate the TCP performance of the flow with increasing utilization of the aggregation link. We use this method of estimation as the basis for a method of dimensioning the bandwidth of the link such that TCP performance is maintained and a method of managing bandwidth by comparing measured link utilization with the estimated threshold that indicates degradation of TCP performance. We also use simulation to analyze the accuracy of the estimates produced by our method.

UR - http://www.scopus.com/inward/record.url?scp=4644293189&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=4644293189&partnerID=8YFLogxK

M3 - Conference contribution

SN - 3800728400

SN - 9783800728404

SP - 15

EP - 20

BT - Networks 2004 - 11th International Telecommunications Network Strategy and Planning Symposium

A2 - Kaindl, H.

ER -