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Mathematical Problems in Engineering
Volume 2014, Article ID 487483, 13 pages
Research Article

A QoS-Oriented Congestion Control Mechanism for Satellite Networks

Department of Computer Science and Technology, Tsinghua University, Beijing 100084, China

Received 29 March 2014; Revised 1 July 2014; Accepted 8 July 2014; Published 6 August 2014

Academic Editor: Nenad Mladenovic

Copyright © 2014 Heyu Liu and Fuchun Sun. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The sharply increasing amount of data, which are transferred by the satellite network, requires the satellite network to provide quality-of-service (QoS). However, the upsurge in the data flow leads to the network congestion, impeding its ability to offer QoS. Congestion control mechanisms, deployed in the ground networks, have been thoroughly studied. But those deployed in the satellite networks have not been studied yet. As satellite networks are now important supplements to the ground backbone networks, this paper carefully analyzes the current challenges of developing the QoS-oriented congestion control mechanism for satellite networks. On this basis, a consequent mechanism QMCC (QoS-oriented mechanism of congestion control for satellite networks) is described in detail. Under that QMCC, the source nodes utilize an equation to compute the sending rate for each data flow; meanwhile, the intermediate nodes keep detecting real-time package-loss rates for timely adjustments. Simulation results indicate QMCC can provide superior congestion control performance, and raise network throughputs without reducing the QoS effects.