A Solution to Select Multicast Service Nodes of Overlay Network

In order to select optimal multicast service node (MSN) of layered overlay network, a hybrid real-coded genetic algorithm (HRCGA) is proposed. The fitness function with penalty operator is created to prevent bad chromosomes participating evolution. Also, an evolving control strategy is proposed to enhance the local search ability. Results of computer simulation show that HRCGA not only avoids converging to local minimum value, but also is robust to initialization. And the global search ability is enhanced compared with SGA.