Evaluation of TCP Performance on Asymmetric Networks Using Satellite and Terrestrial Links

Hiroyasu OBATA  Kenji ISHIDA  Junichi FUNASAKA  Kitsutaro AMANO  

IEICE TRANSACTIONS on Communications   Vol.E84-B   No.6   pp.1480-1487
Publication Date: 2001/06/01
Online ISSN: 
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Issue on New Developments on QoS Technologies for Information Networks)
TCP performance,  asymmetric networks,  satellite links,  terrestrial links,  Internet,  

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By the growth of the Internet, the client's access to the Internet have been increasing. In order to meet those demands, asymmetric networks have become a great attraction. However, asymmetric networks composed of satellite and terrestrial links have not been enough investigated. Therefore, this paper proposes a new formula for TCP performance evaluation for the asymmetric networks. Using this evaluation formula, we calculate the throughput of TCP Reno over the asymmetric networks taking Slow Start into account. The calculation results are compared with the following: (1) the value based on an existing theoretical formula, (2) the outputs of simulation by NS (Network Simulator), and (3) the experimental results using VSAT (Very Small Aperture Terminal) satellite communication system for satellite links and the Internet for terrestrial links. As a result, it is shown that the new formula is more precise than the one already proposed.