Abstract
We propose a method of dimensioning and managing the bandwidth of a link on which flows with heterogeneous access-link band-widths are aggregated. We use a processor-sharing queue model to develop a formula approximating the mean TCP file-transfer time of flows on an access link in such a situation. This only requires the bandwidth of the access link carrying the flows on which we are focusing 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 affecting actual TCP behavior, such as the round-trip time and restrictions other than the access-link bandwidth and the congestion of the aggregation link. To do this, we define the virtual access-link bandwidth as the file-transfer speed of a flow when the utilization of the aggregation link is negligibly small. We apply the virtual access-link bandwidth in our approximation to estimate the TCP performance of a flow with increasing utilization of the aggregation link. This method of estimation is used as the basis for a method of dimensioning the bandwidth of a link such that the TCP performance is maintained, and for a method of managing the bandwidth by comparing the measured link utilization with an estimated threshold indicating degradation of the TCP performance. The accuracy of the estimates produced by our method is estimated through both computer simulation and actual measurement.
| Original language | English |
|---|---|
| Pages (from-to) | 4605-4614 |
| Number of pages | 10 |
| Journal | IEICE Transactions on Communications |
| Volume | E88-B |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 2005 Dec |
| Externally published | Yes |
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Keywords
- Bandwidth dimensioning and management
- Heterogeneous access links
- Processor-sharing model
- TCP performance
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Computer Networks and Communications
Cite this
Method of bandwidth dimensioning and management for aggregated TCP flows with heterogeneous access links. / Kawahara, Ryoichi; Ishibashi, Keisuke; Mori, Tatsuya; Ozawa, Toshihisa; Abe, Takeo.
In: IEICE Transactions on Communications, Vol. E88-B, No. 12, 12.2005, p. 4605-4614.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - 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 - Abe, Takeo
PY - 2005/12
Y1 - 2005/12
N2 - We propose a method of dimensioning and managing the bandwidth of a link on which flows with heterogeneous access-link band-widths are aggregated. We use a processor-sharing queue model to develop a formula approximating the mean TCP file-transfer time of flows on an access link in such a situation. This only requires the bandwidth of the access link carrying the flows on which we are focusing 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 affecting actual TCP behavior, such as the round-trip time and restrictions other than the access-link bandwidth and the congestion of the aggregation link. To do this, we define the virtual access-link bandwidth as the file-transfer speed of a flow when the utilization of the aggregation link is negligibly small. We apply the virtual access-link bandwidth in our approximation to estimate the TCP performance of a flow with increasing utilization of the aggregation link. This method of estimation is used as the basis for a method of dimensioning the bandwidth of a link such that the TCP performance is maintained, and for a method of managing the bandwidth by comparing the measured link utilization with an estimated threshold indicating degradation of the TCP performance. The accuracy of the estimates produced by our method is estimated through both computer simulation and actual measurement.
AB - We propose a method of dimensioning and managing the bandwidth of a link on which flows with heterogeneous access-link band-widths are aggregated. We use a processor-sharing queue model to develop a formula approximating the mean TCP file-transfer time of flows on an access link in such a situation. This only requires the bandwidth of the access link carrying the flows on which we are focusing 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 affecting actual TCP behavior, such as the round-trip time and restrictions other than the access-link bandwidth and the congestion of the aggregation link. To do this, we define the virtual access-link bandwidth as the file-transfer speed of a flow when the utilization of the aggregation link is negligibly small. We apply the virtual access-link bandwidth in our approximation to estimate the TCP performance of a flow with increasing utilization of the aggregation link. This method of estimation is used as the basis for a method of dimensioning the bandwidth of a link such that the TCP performance is maintained, and for a method of managing the bandwidth by comparing the measured link utilization with an estimated threshold indicating degradation of the TCP performance. The accuracy of the estimates produced by our method is estimated through both computer simulation and actual measurement.
KW - Bandwidth dimensioning and management
KW - Heterogeneous access links
KW - Processor-sharing model
KW - TCP performance
UR - http://www.scopus.com/inward/record.url?scp=29144482698&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=29144482698&partnerID=8YFLogxK
U2 - 10.1093/ietcom/e88-b.12.4605
DO - 10.1093/ietcom/e88-b.12.4605
M3 - Article
AN - SCOPUS:29144482698
VL - E88-B
SP - 4605
EP - 4614
JO - IEICE Transactions on Communications
JF - IEICE Transactions on Communications
SN - 0916-8516
IS - 12
ER -