WDM網(wǎng)中一種聯(lián)合優(yōu)化的自適應(yīng)保護算法

研究WDM網(wǎng)絡(luò)的生存性問題，提出了一種聯(lián)合優(yōu)化的自適應(yīng)專用通路保護算法。該算法根據(jù)網(wǎng)絡(luò)拓撲信息和資源使用情況動態(tài)調(diào)整鏈路權(quán)值，并在此基礎(chǔ)上為到達業(yè)務(wù)連接請求，同時找到一對鏈路分離的工作通路和保護通路，而且保證二者占用資源總量最少。與文獻中已有算法相比，JOA可以降低算法的時間開銷，同時還有利于全網(wǎng)負載均衡和少用資源，從而可以有效提高全網(wǎng)資源利用率，進一步降低業(yè)務(wù)連接請求的阻塞率。通過仿真將所提算法與傳統(tǒng)算法進行了對比，給出了仿真結(jié)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.