Comparison between Intelligent Optical Network and Traditional Optical Network. Principle of Intelligent Optical Network, страница 2

n  Shortens the service establishing period, supports dynamic application and release of the bandwidth.

n  Supports auto-balance and optimization of the network link load.

n  Simplifies network management.

n  Realizes interconnection and interworking of different networks.

n  Provides new value-added services which develop the traditional transmission network into a service network. The services cover bandwidth allocation, bandwidth lease and bandwidth wholesale, optical virtual private network (OVPN), SLA.

Naturally, the optical network finally develops from a bandwidth transmission network into a profit-making service network.

4.1.2  Comparison between Intelligent Optical Network and Traditional Optical Network

1.  Problems in Traditional Optical Network Operation

n  The end-to-end service generation requires section-by-section configuration through the NM and is time-consuming. In another word, the end-to-end service cannot be rapidly generated and protected.

n  Auto-balance and optimization of the network load can not be realized.

n  Service type is simple, lacking of SLA.

n  Real-time management can not be implemented, and changes in the network topology can not be reflected in the NM in a real time manner.

n  There are too many lays and equipments in the NM and the NM for such equipments as DXC, ADM and DWDM are not unified.

n  Equipments overlap in the backbone layer, with too many interconnected optical interfaces and complex network structures.

n  Most network topologies are in the forms of rings. The intersecting node then becomes the bottleneck in service grooming.

n  The SDH ring requires a 50% bandwidth reservation for protection, which lower the bandwidth availability.

2.  Demands for Intelligent Optical Network

n  The demands for data service grow rapidly, and the intelligent optical network tends to be the mainstream in the future service development.

n  The demand outburst for data service bandwidth greatly challenges the traditional optical network.

n  The rapid grow of data service promotes the requirement for scalability of the transmission network.

n  The management over the client equipments features simplicity and is plug-and-play.

n  Sufficient bandwidth should be provided and services should be initiated rapidly.

n  The optical network should provide a variety of services and applications.

n  Fast development of data service makes the old speech-oriented transmission network no longer meet the requirement of new services.

3.  Advantages of Intelligent Optical Network

As the intelligent technology is introduced into optical network, dynamic application, automatic routing and establishment of the service can be realized. As a result, service management over the network is simplified and the operation cost is lowered. The network equipment at the client can make bandwidth request directly through signaling, then the optical network can search for the desired service path. Moreover, the network will send the service configuration to respective nodes through this path to automatically establish the services.

n  The multiple sets of old equipments can be substituted with merely one set of equipment of new model, thus making the network structure clearer.

n  Flexible service grooming is realized with large-volume and multi-granularity switching enabled.

n  The self-adaptive mesh network features idea scalability.