基于子节点编码和声搜索的QoS组播路由算法

摘要

As the high complexity and low convergence speed, traditional methods could not solve QoS multicast routing problem to satisfy the network requirement. A Harmony Search algorithm based on Child-Node Encoding (CNE-HS) is proposed for better performance. Three improved aspects present as follows: A new method is designed to create initial solution and new solution, which improves convergence speed;A new dynamic method is proposed to change parameters, which accounts global searching and local searching ability; A new encode mechanism is designed based on children node, which accelerates improvising new solutions. Theoretical analysis and the results of simulations prove the low complexity of CNE-HS, and show that CNE-HS performs much better than GA and HS-based algorithm using Node Parent Index (HSNPI) algorithm in convergence speed and cost.%传统启发式方法求解QoS组播路由问题复杂度高，收敛速率慢，无法满足实际需求。该文提出一种基于子节点编码的和声搜索算法以解决该问题。在和声搜索算法的基础上，该算法设计了新的初始解及新解生成方式，提升了算法执行效率；提出了参数动态调整方案，兼顾了全局搜索以及局部搜索能力；同时设计了一种基于子节点的组播树编码方式，加快了新解生成过程。通过理论分析仿真实验，证明了该文算法的低复杂度，表明该文算法在收敛速率和代价方面具有明显优势。