Abstract:

The routing infrastructure of multi-area and hierarchy in the automatically switched optical network (ASON) was researched. A notification mechanism of topology information based on speaker node is proposed, which realizes topology discovery, synchronization and routing computation in the hierarchical network. The simulation showed that the size of routing load and link state database (LSDB) was rapidly decreased with the increase of routing layers. This mechanism can solve the scalability of the network, save the memory space of the node and improve the routing efficiency.

Key words: automatically switched optical network, topology aggregation, speaker notification, hierarchical routing