PLS流量工程故障恢复路径算法

Algorithm of path restoration for MPLS traffic engineering

提出一种适合MPLS保护切换和再路由——备份路径预有效恢复机制的备份路径优化算法。该算法引入故障说明,针对指定的保护对象计算恢复路径。同时,对链路的带宽进行分割,在链路可用带宽中指定备份路径可用带宽。通过算法优化,备份路径可以充分利用工作路径上的资源,降低带宽资源消耗,在保证网络提供连续服务能力的同时,提高网络资源的利用率,优化网络的运行性能。

The algorithm used in MPLS backup path computation for resilience mechanism of protection switch and rerouting--backup path pre-establishment is proposed. The fault statement mechanism is introduced in the algorithm, which ensures that the backup path is computed only for the paths to be protected. The amount oflink bandwidth is allocated for fault recovery through the bandwidth division mechanism. Through the treatment, the resource in the work path is utilized when the fault occurs, thus the network resource utilization is improved and the performance of operational network is enhanced, while simultaneously fast fault recovery capability is provided.