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.

• 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。