|
For Full-Text PDF, please login, if you are a member of IEICE,
or go to Pay Per View on menu list, if you are a nonmember of IEICE.
|
A Method of Bandwidth Dimensioning and Management Using Flow Statistics
Ryoichi KAWAHARA Keisuke ISHIBASHI Takuya ASAKA Shuichi SUMITA Takeo ABE
Publication
IEICE TRANSACTIONS on Communications
Vol.E88-B
No.2
pp.643-653 Publication Date: 2005/02/01 Online ISSN:
DOI: 10.1093/ietcom/e88-b.2.643 Print ISSN: 0916-8516 Type of Manuscript: PAPER Category: Network Management/Operation Keyword: TCP performance, bandwidth dimensioning and management, number of active flows,
Full Text: PDF(888KB)>>
Summary:
We develop a method of dimensioning and managing the bandwidth of a link on which TCP flows from access links are aggregated. To do this, we extend the application of the processor-sharing queue model to TCP performance evaluation by using flow statistics. To handle various factors that affect actual TCP behavior, such as round-trip time, window-size, and restrictions other than access-link bandwidth, we extend the model by replacing the access-link bandwidth with the actual file-transfer speed of a flow when the aggregation link is not congested. We only use the number of active flows and the link utilization to estimate the file-transfer speed. Unlike previous studies, the extended model based on the actual transfer speed does not require any assumptions/predeterminations about file-size, packet-size, and round-trip times, etc. Using the extended model, we predict the TCP performance when the link utilization increases. We also show a method of dimensioning the bandwidth needed to maintain TCP performance. We show the effectiveness of our method through simulation analysis.
|
|
|