Title :
Parameter gamma Conditions for Stability of FAST TCP
Author :
Liang, Wei ; Zhang, Shunyi ; Xiangyan Ning ; Ning, Xiangyan ; Sun, Yanfei ; Chang, Jinyi
Author_Institution :
Nanjing Univ. of Posts & Telecommun., Nanjing, China
Abstract :
The stability of FAST TCP in a single-link single-source is studied in this paper. A continuous time fluid flow model of the link buffer is considered to build a linear control system model related to fast TCP. Linearing the fluid flow model and window control model, Laplace transform version of the equations are presented. It results in a negative feedback system with open loop transfer function. With the analysis of Nyquist curve of the system, a sufficient condition on asymptotical stability of fast TCP congestion window related to the parameter gamma is obtained. Packet level NS2 simulations are used to verify the theoretical claims.
Keywords :
Laplace transforms; asymptotic stability; linear systems; transport protocols; Laplace transform; Nyquist curve; asymptotical stability; continuous time fluid flow model; fast TCP congestion window; linear control system; link buffer; negative feedback system; open loop transfer function; packet level NS2 simulations; parameter gamma condition; single-link single-source; transport control protocol; window control model; Control system synthesis; Fluid flow; Fluid flow control; Laplace equations; Negative feedback; Negative feedback loops; Open loop systems; Stability; Sufficient conditions; Transfer functions;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2009. WiCom '09. 5th International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4244-3692-7
Electronic_ISBN :
978-1-4244-3693-4
DOI :
10.1109/WICOM.2009.5302913
