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Liaoning Electric Power’s legacy communication network mainly carried basic communication services. However, as information and automated applications grew, its array of services required more bandwidth. This strained the reliability and capacity of the transport network. As a result, Liaoning Electric Power sought to restructure its provincial backbone transport network with Optical Transport Network (OTN) technology.
Huawei recommended its OTN-based 40 x 10G Dense-Wavelength-Division Multiplexing (DWDM) system for both the provincial backbone transport network and the core-layer transport network for the Local Area Network (LAN). These kinds of OTN systems accommodate IP-based service transmission, flexibly groom large-capacity services, and protect networks. Liaoning Electric Power selected Huawei’s OTN solution and deployed 14 sets of OptiX OSN 6800 equipment. The equipment was deployed in the OTN provincial backbone transport network covering the central and east areas of Liaoning province. Network features included:
Huawei’s OptiX OSN 6800 has separate tributary and line boards for centralized service grooming and bandwidth sharing. With this solution, Sychronous Digital Hierarchy (SDH) services such as 155M, 622M, 2.5G, and IP GE services, can share the same wavelength without wasting any bandwidth. These separate tributary and line boards can be easily replaced as required, maximizing customers’ return on investment.
Huawei’s OTN solution provides more comprehensive protection than legacy WDM. Link-level, channel-level, and subchannel-level protection schemes include ODUk SPRing (for ring networks) and Subnetwork Connection Protection (SNCP). These diverse protection schemes greatly enhance network reliability. ODUk SNCP in particular provides multi-homing protection, which enables smooth, in-service switching between protection trails on a ring network.
Huaweiʼs OTN solution also employs Reconfigurable Optical Add-Drop Multiplexers (ROADMs). These devices can flexibly and dynamically add, block, pass or redirect modulated infrared (IR) and visible light beams of various wavelengths in a fiber-optic network.
With Huawei’s OTN solution, Liaoning Electric Power has built a new provincial backbone transport network that features larger capacity, easier scalability, and higher reliability and security. Other benefits include:
Liaoning Electric Power can use the OTN transport network for its planned automated electric power initiatives.
The electrical-layer Automatic Switched Optical Network (ASON) enables the network to withstand multi-point faults, a feature that further enhances network security.
Huaweiʼs hybrid Optical Amplification (OA) boards for coherent transmission systems further improve system performance while saving costs. Compared with common OA boards, the hybrid boards have a smaller noise figure and a longer transmission distance, which substantially reduce the number of signal regenerators required.
Huawei has long been a leader in the global optical network, WDM/OTN, and 100G/40G markets, as well as the backbone WDM market. At least 39 of the worldʼs top 50 carriers are using Huaweiʼs WDM/OTN solution.