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WDM网中一种联合优化的自适应保护算法
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2009-05-28
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研究WDM网络的生存性问题，提出了一种联合优化的自适应专用通路保护算法。该算法根据网络拓扑信息和资源使用情况动态调整链路权值，并在此基础上为到达业务连接请求，同时找到一对链路分离的工作通路和保护通路，而且保证二者占用资源总量最少。与文献中已有算法相比，JOA可以降低算法的时间开销，同时还有利于全网负载均衡和少用资源，从而可以有效提高全网资源利用率，进一步降低业务连接请求的阻塞率。通过仿真将所提算法与传统算法进行了对比，给出了仿真结果。A joint optimal adaptive protection algorithm (JOA) is proposed to establish dependable connections for dynamic arriving connection requests in WDM networks. JOA first adjusts the cost of links according to the current state of network adaptively, and it then computes a pair of primary path and backup path for each connection request simultaneously. JOA attempts to perform optimization on the path-pair selection, and to achieve efficient resource utilization. Based on dynamic traffic with different load, the performance of JOA has been investigated against some traditional approaches via simulations. The results show that JOA has a better performance than other schemes.
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