@Article{iasc.2020.010112,
AUTHOR = {Qixue Guan, Yueqiu Jiang},
TITLE = {An Improved TCP Vegas Model for the Space Networks of the Bandwidth  Asymmetry},
JOURNAL = {Intelligent Automation \& Soft Computing},
VOLUME = {26},
YEAR = {2020},
NUMBER = {4},
PAGES = {773--781},
URL = {http://www.techscience.com/iasc/v26n4/40282},
ISSN = {2326-005X},
ABSTRACT = {It is known that congestion in the reverse direction happens in advance of the 
congestion in the forward direction due to the significant bandwidth asymmetry 
in the two directions of the space networks, especially in the satellite networks, 
which enables the TCP Vegas to enter the phase of the congestion avoidance 
blindly and reduce the throughput of the forward direction. To solve this 
problem, a congestion control model, TCP Vegas-DDA, which maintains the 
frequency of the acknowledgments in the reverse direction is proposed. The 
model sets the interval time between acknowledgments dynamically based on 
the variation of the queuing delay in the reverse direction and reduces the 
impact of the queuing delay on the congestion control algorithm by amending 
the value of the base round-trip time. Results of the simulation indicate the 
problem of the low throughput in the forward direction caused by the 
congestion in the reverse direction can be solved, and the performance of the 
TCP Vegas in the asymmetric links can be improved.},
DOI = {10.32604/iasc.2020.010112}
}