A novel multiclass QoS routing for satellite constellation networks
1.College of Electronic and Information Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210016, China; 2.College of Astronautics, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 210016, China
Abstract：To solve the different QoS requirements of multimedia traffic, a novel multiclass QoS routing algorithm(MQoSR) for LEO satellite networks was proposed. The ultimate goal of MQoSR was to maximize network resource efficiency by ensuring performance of highpriority traffic classes and to improve the excution of lowpriority classes. The classification link cost was presented based on multiple QoS requirments and dynamic link status. The concept of critical link was introduced to reduce the influence between traffic classes and allocate network resources efficiently, and the incremental cost of critical link was defined by link utilization, residual bandwidth and load expectation. Simulation environment of satellite network and global traffic was built up by VC and Matlab. MQoSR and three other routings were simulated. The experimental results show that the MQoSR not only guarantees average path delay, blocking probability and throughput of high priority class traffic, but also greatly improves these performance of low priority class traffic. The load balance and the network resource utilization are enhanced effectively.
2013, Vol. 34 
