earticle

영어

To deal with the issues like existing generation of congestion nodes and redundancy transmission in the traditional load balancing algorithm, this paper puts forward the load balance multicast routing and spectrum allocation algorithm based on QOS constraints. The algorithm adopts LBWC algorithm to calculate the wireless link weight, and carries out the structure of the load balancing multicast tree. Then, the QOS constraints spectrum allocation algorithm is adopted based on wireless channel broadcast feature to conduct channel allocation of wireless link. Algorithm in this paper is under the condition of wireless multicast QOS constraints satisfactions, which balance the node load, minimize the transmission times of the wireless multicast business and reduce the consumption of network resources. Finally, simulation experiments are carried out, such as the influence of wireless multicast business number on the performance of the algorithm, the influence of the number of multicast destination node on the performance of the algorithm, the influence of the number of available channel on the performance of the algorithm and the influence of the control parameter β on the performance of algorithm, etc. Experimental results show that in the case of wireless multicast service constraint, the algorithm avoids the congestion nodes and reduces the times of transmission.