Huawei, a world leading information and communications technology (ICT) solutions provider, has today launched a new coherent CDMA metro optical transmission solution and prototype at the Optical Fiber Communication Conference and Exhibition (OFC) 2016.
By integrating WDM technology, the prototype supports direct coupling and transmission of up to 2560 nodes and flexible service rate configuration from 6.25 Gbit/s to 200 Gbit/s for single nodes, providing a total convergence capacity of 16 Tbit/s. This provides a new solution for future flattened metro optical transmission.
With the rapid development of services such as 4K video, cloud, and mobile Internet services, future metro networks must meet various requirements including flat architecture, adjustable rates, flexible services, unified bearer, quick service provisioning, and low latency. Huawei's coherent CDMA metro optical transmission prototype supports access of 32 nodes on a single wavelength, to allow the same wavelength to be shared by multiple nodes by allocating different orthogonal spreading codes to each node. Data of each node is recovered using the corresponding spreading codes on the receiver. As a result, a 200 Gbit/s (32 x 6.25 Gbit/s) capacity from 32 nodes can be transmitted over a single wavelength. By integrating WDM technology, the solution supports access of 2560 nodes over 80 wavelengths in the C band, providing a total capacity of 16 Tbit/s. In addition, the solution allows flexible service access rate adjustments through the spreading code assignment, achieving access of multiple nodes and flexible bandwidth granularities. Moreover, optical signals from each node are directly coupled and transmitted through low-cost optical couplers, simplifying optical-layer design and reducing CAPEX and OPEX.
Serving customers with the most advanced transport network solutions, Huawei continues to provide technical innovations to meet customer requirements, and will cooperate with operators to accommodate larger bandwidth demands and shape the future for optical networks.