A Dynamically Adjustive Congestion Control Algorithm Based on CTCP

doi:10.3969/j.issn.1006-2475.2014.12.016

Abstract

Abstract: Space network has some characteristics, such as long transmission delay and high packet loss rate, which lead it difficult to use ground routing protocols in space network completely. CTCP is a new transport protocol using network coding technology, and experiment shows that its performance in space network environment is better than TCP’s. However, CTCP’s congestion control mechanism is similar to TCP-Reno’s, which congestion window is set statically, causes the result that the performance of CTCP’s congestion control in the complex network environment is not ideal. This paper presents a dynamically adjustive congestion control algorithm H-CTCP based on CTCP, which in real-time estimates the available bandwidth in space network, and dynamically sets the congestion window. Experimental results indicated that the improved congestion control algorithm H-CTCP is more suitable in space network of high packet loss rate, and increased transmission performance.

Key words: space network, network coding, CTCP, routing protocol

CLC Number:

TP393

XIAO Tao, YU Wan-rong, FENG Zhen-qian, LIU Hua, WU Chun-qing, CHEN Tao. A Dynamically Adjustive Congestion Control Algorithm Based on CTCP[J]. Computer and Modernization, doi: 10.3969/j.issn.1006-2475.2014.12.016.

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