IP/Ethernet is the dominant switching and routing technology in the current North America networks. The key drivers are its high scalability, flexibility and the low Total Cost of Ownership (TCO). One of the key challenges by service providers is to find optimized solutions that can scale and provide new services to both new and existing customers. Huawei IP/Ethernet products provide one of the best solutions in the industry with minimum TCO in terms of port density, pricing, and power consumption.
Realizing the synergy in traffic, protection and O&M, the SingleBackbone solution can help you further boost IP&OTN synergy, while building a high-performance backbone network at a lower cost.
The explosive growth of ultra-broadband services has nurtured continual development of technologies for the backbone bearer network. At the IP layer, cluster routers have enhanced the performance and switching capacity of backbone routers. At the optical layer, the optical transport network has an ultra large capacity and long distance transmission capabilities, plus intelligent functions.
Backbone networks are imposing new requirements on the transport network, including: 1) 40G/100G high speed transmission to meet the increasing traffic. 2) Tbit large-capacity cross-connection to fully connect core nodes and establish direct routing between regional nodes. 3) Intelligent control plane that can help realize end-to-end service provisioning through large-capacity cross connections, while enhancing the reliability of backbone networks.
IP over OTN is key to backbone networks. Currently IP over OTN generally uses a static optimization approach, requiring manual operations for network planning and configuration. A better approach is to use real-time optimization, which requires synergy between IP and the OTN. Huawei has launched its SingleBackbone solution, realizing synergy for traffic distribution, co-protection, and network management for both the IP and OTN layers.
Traffic distribution synergy: IP/OTN synergy for traffic distribution can help to enhance network performance and lower expansion pressure. If the traffic between any two routers exceeds the set value, the router can request bandwidth through the UNI interface. Receiving the request from IP layer, transport network will establish a direct optical routing between these two routers after routing and wavelength assignment (RWA) calculation. As a result, service providers do not need to expand the capacity as traffic is diverted through the OTN.
Co-protection for services: For a backbone network with IP over OTN, the optical layer focus is on protecting physical layer devices, while IP layers are mainly protecting network nodes, ports and logical links. The co-protection of optical and IP layers enhance network reliability and efficiency. Thanks to the large number of direct routing paths on the optical layer, an IP network can reduce the number of hops to only one in some cases, simplifying the QoS mechanism and minimizing the impact of network traffic.
Network management synergy: Proper network management synergy realizes unified alarms, troubleshooting, and one-stop E2E service configuration. With IP and OTN synergy, backbone networks can remove traffic bottlenecks with unified traffic management, plus the co-protection function can enhance network reliability and performance. The network management synergy also assists in troubleshooting and alarm filtering, which enables E2E service provisioning. Practices show that for a typical backbone network, IP and OTN integration can save over 40% of CAPEX, OPEX and equipment room space.
Huawei implemented testing of IP & OTN Synergy in cooperation with several leading operators in Europe as well as authoritative third-party including EANTC. Huawei was the only vendor that passed EANTC's IP&OTN interoperability test, laying a solid foundation for future deployments.
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