Generalized Modeling and Stability Analysis of HighSpeed TCP and Scalable TCP

Xiaomeng HUANG
Chuang LIN
Fengyuan REN

Publication
IEICE TRANSACTIONS on Communications   Vol.E89-B    No.2    pp.605-608
Publication Date: 2006/02/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.2.605
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Network
Keyword: 
congestion control,  stability,  

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Summary: 
In this letter we examine two transport protocols, HighSpeed TCP [1] and Scalable TCP [2] which are both sender-side varieties of TCP. Based on the fluid flow theory, we develop a general nonlinear model and use gain margin and phase margin to evaluate the stability of a closed-loop system which is composed of a transport protocol and an active queue management scheme. Our results indicate that HSTCP and STCP are stabler than standard TCP when link bandwidth, flow number and round-trip time vary.