Cao Jin, Guo Lei, Yu Hongfang, Li Lemin
Opt Express. 2005 Apr 18;13(8):3087-95. doi: 10.1364/opex.13.003087.
With the maturation of the technology of Wavelength-Division-Multiplexing (WDM) in optical networks, the survivable design has become a key issue. In this paper, we propose a Segment Shared Protection Algorithm (SSPA), which is based on the reliability of the networks and the different levels of the fault tolerance requested by the users, to protect the single-link failure in WDM optical networks. The main idea of the SSPA is to provide a backup path for a segment, which is divided in accordance with the policy of the Differentiated Reliability (DiR), on the primary path of each connection request. Under the guarantee of the blocking probability and the connection's reliability, the SSPA has higher resource utilization ratio and faster recovery time than the previous algorithm PSPA-DiR. We evaluate the effectiveness of the SSPA and the results are found to be promising.
随着光网络中波分复用（WDM）技术的成熟，可生存性设计已成为一个关键问题。在本文中，我们提出了一种段共享保护算法（SSPA），该算法基于网络的可靠性以及用户所要求的不同容错级别，用于保护WDM光网络中的单链路故障。SSPA的主要思想是在每个连接请求的主路径上，为根据差异化可靠性（DiR）策略划分的段提供一条备份路径。在阻塞概率和连接可靠性的保证下，SSPA比先前的算法PSPA-DiR具有更高的资源利用率和更快的恢复时间。我们评估了SSPA的有效性，结果很有前景。
