Wavelength-switched optical network

The definition of WSON2.0 technology

Wavelength Switched Optical Network (WSON) 2.0 is an optical network technology based on wavelength switching, aiming to achieve dynamic wavelength scheduling, automated service recovery and intelligent operation and maintenance of optical networks by introducing advanced control plane and optical layer switching technologies. WSON2.0 technology is an evolution of traditional WSON, addressing the shortcomings of early WSON in large-scale network management, business recovery time, and cross-domain interoperability.

The background and requirements of WSON2.0 technology

The limitations of traditional optical networks

Traditional optical transport networks mainly rely on manual configuration and static management, making it difficult to achieve dynamic wavelength scheduling and rapid service recovery. With the expansion of network scale and the diversification of business demands, traditional optical networks have gradually exposed their deficiencies in terms of flexibility, reliability and operation and maintenance efficiency.

The development demands of all-optical Network 2.0

In the era of all-optical Network 2.0, optical transmission networks need to support larger-scale network formation, higher bandwidth requirements, more flexible service scheduling, and more intelligent operation and maintenance management. WSON2.0 technology was precisely developed to meet these demands.

Key features of WSON2.0 technology

Super-large network capacity

WSON2.0 needs to support the management and control of large-scale networks and be capable of managing 300 to 1,000 ROADM (Reconfigurable Optical Add-drop Multiplexer) network elements. This ultra-large network capability can significantly increase the network's resistance to fiber breakage times, save network construction costs and the number of boards, and shorten the end-to-end latency of services through one-hop direct delivery.

Deterministic recovery capability

WSON2.0 offers different levels of deterministic recovery capabilities, including recovery time grades such as 30 seconds, 10 seconds, and 2 seconds. This deterministic recovery capability can meet the business reliability requirements in different scenarios. The shorter the business rerouting time, the higher the reliability.

Intelligent control

WSON2.0, based on machine learning and artificial intelligence technologies, realizes intelligent and digital modeling of the optical layer. Through feature extraction and deep learning, WSON2.0 can balance the performance recovery of the entire network and local areas, obtain the optimal solution, and achieve intelligent adaptation in scenarios such as intelligent optimization testing, health prediction, intelligent network slicing, and optoelectronic collaboration.

The key technologies of WSON2.0

Dynamic global routing technology

In ultra-large-scale network scenarios, WSON2.0 ensures the efficiency of path calculation and the time for re-routing recovery through dynamic global routing technology. This technology can effectively solve the problems of path calculation and resource allocation in large-scale networks.

Network slicing technology

WSON2.0 adopts network slicing technology to address the decentralization and domain-based control requirements of large networks and provide differentiated business experiences. Network slicing technology can divide a physical network into multiple logical networks, each of which operates independently without interfering with each other.

Hardware forwarding technology for signaling route establishment messages

WSON2.0 eliminates the uncertainty of traditional signaling protection software forwarding through the hardware forwarding technology of signaling routing messages, thereby achieving faster service establishment and recovery.

OTU variable wavelength technology

WSON2.0 adopts OTU (Optical Transmission Unit) variable wavelength technology, enhancing the utilization efficiency of wavelength resources and further optimizing the flexibility and resource management capabilities of the network.

The application scenarios of WSON2.0 technology

All-optical backbone network

WSON2.0 technology is widely applied in the construction of all-optical backbone networks, supporting the efficient operation of large-scale ROADM networks. For instance, China Telecom has established a nationwide integrated primary and secondary backbone all-optical switching network, marking the steady development of "All-Optical Network 2.0" at the backbone network level.

Cloud-network collaboration

In the cloud-network collaboration scenario, WSON2.0 technology can achieve high-speed and flexible connections between data centers, supporting the dynamic scheduling and efficient utilization of cloud computing resources.

Intelligent optimization and testing

WSON2.0 technology, through intelligent debugging and testing technology, conducts nonlinear and precise modeling of optical network parameters, and uses AI algorithms for parallelized debugging and testing to ensure fine control and the optimal performance of the entire network debugging and testing.

Health prediction and intelligent network slicing

WSON2.0 technology can achieve health prediction of the network, detect potential faults in advance and carry out preventive maintenance. Meanwhile, through intelligent network slicing technology, WSON2.0 can provide isolated network resources for different services, meeting diverse business requirements.

The advantages of WSON2.0 technology

High flexibility

WSON2.0 technology achieves flexible allocation and efficient utilization of network resources through dynamic wavelength scheduling and network slicing technology.

High reliability

WSON2.0 offers deterministic service recovery capabilities, significantly enhancing the reliability of the network and its resistance to fiber breakage.

Intelligent operation and maintenance

WSON2.0, based on machine learning and artificial intelligence technologies, has achieved intelligent operation and maintenance of networks, including intelligent optimization and testing, health prediction, and intelligent network slicing.

Efficient resource utilization

WSON2.0 technology optimizes the utilization efficiency of wavelength resources and reduces the cost of network construction and operation through OTU variable wavelength technology and dynamic global routing technology.

The future development direction of WSON2.0 technology

Cloud-network collaboration

With the development of cloud computing and edge computing, WSON2.0 technology will play a greater role in cloud-network collaboration scenarios, supporting high-speed connections and dynamic resource scheduling between data centers.

In-depth application of AI

WSON2.0 technology will be deeply integrated with artificial intelligence technology to achieve more intelligent network optimization, fault prediction and resource management.

Photoelectric synergy

WSON2.0 technology will be combined with photoelectric synergy technology to achieve seamless synergy between the optical layer and the electrical layer, further enhancing the flexibility and efficiency of the network.

Summary

Wavelength Switched Optical Network (WSON) 2.0 technology is an important innovation in the field of optical communication networks. By introducing advanced control plane and optical layer switching technologies, it realizes dynamic wavelength scheduling, automated service recovery and intelligent operation and maintenance of optical networks. WSON2.0 technology has broad application prospects in scenarios such as all-optical backbone networks, cloud-network collaboration, intelligent optimization and testing, and health prediction. With the continuous development of technology, WSON2.0 will provide stronger support for the intelligent and automated development of optical communication networks.