TCP over bandwidth asymmetric networks such as Cable TV and Asymmetric Digital Subscriber Loop (ADSL) exhibits different characteristics from TCP on symmetric links. A number of techniques have been proposed to address this problem. However, previous research has been largely focused on bulk transfers. This paper investigates the effects of bandwidth asymmetry on Web-like short-lived transfers. Two prediction models, one given in a closed form and the other in a recursive form, are presented for TCP transfers without and with ACK Filtering (AF), a representative optimizing technique for TCP transfers over bandwidth asymmetric links. Ns-2 based experiments show that these models can predict TCP transfer latency with a high degree of accuracy.
Bibliographical noteFunding Information:
✩ This research is sponsored in part by grants from the NASA AMES Research Center (administrated by USARDSG, contract No. N68171-01-C-9012), the EPSRC (contract No. GR/R47424/01) and the EPSRC e-Science Core Programme (contract No. GR/S03058/01). * Corresponding author. E-mail addresses: email@example.com (G. Tan), firstname.lastname@example.org (S.A. Jarvis).
- Bandwidth asymmetry
- TCP transfer
ASJC Scopus subject areas
- Theoretical Computer Science
- Computer Networks and Communications
- Computational Theory and Mathematics
- Applied Mathematics