NORDUnet (News - Alert) provides the Nordic backbone to the global infrastructure for research and education. A joint collaboration by the five Nordic National Research and Education Networks in Denmark, Finland, Iceland, Norway and Sweden, NORDUnet needed to transform a legacy network to a next generation optical one in order to meet the needs of its demanding users.
As a leader in packet optical transport, Alcatel-Lucent (News - Alert) worked with NORDUnet on upgrading its network, as highlighted in a recent case study. They tested and deployed the Alcatel-Lucent 1830 Photonic Service Switch (PSS)-based Agile (News - Alert) Optical Networking solution over a legacy, photonic Wavelength Division Multiplexing/Reconfigurable Optical Add Drop Multiplexer/Packet-Optical Transport (WDM/ROADM (News - Alert)/P-OT) network.
Agile Optical Networking is designed to keep pace with the diversity of traffic types, noted the case study, with special attention paid to packet clients –IP/MPLS, Ethernet, and packet optical.
The multiservice-capable core infrastructure of the OTN incorporates additional high-bandwidth optical technology to meet the challenges of evolving toward full IP, and offered NORDUnet a number of advantages.
The advantages of the OTN solution include providing a standards-based common framework across optical wavelength transport that also includes TDM switching and aggregation; providing data and timing transparency for packet and TDM and wavelength services; switching at the electronic layer to improve wavelength utilization; maximizing nodal switching capacity to the multi-terabit level; and minimizing the need for large numbers of fine-granularity pipes that complicate network planning, administration, survivability, management systems and control protocols.
OTN also delivers management tools that are complete and fit well within existing carrier networks, enhances SLA verification capabilities in support of multicarrier, multiservice environments, enables transport at the lowest technology layers, gives service providers confidence as transmission speeds continue to increase, and is well-suited to automation through the GMPLS control plane, according to the paper.
With open photonic platforms, utilizing colored interfaces and having solid management integration, OTN technology was adopted as an overlay network for the NORDUnet project. It provided cost-effective benefits to the existing DWDM layer for little effort, and the GMPLS control plane addition in the OTN layer has clear operational advantages in ease of provisioning and the added restoration capabilities.
“During the trial, it was demonstrated that OTN can provide these services, especially for research networks where applications such as medicine, astronomy and high energy, physics-related services should be provided in an agile and adoptive manner,” noted the paper.
Additionally, the OTN technology turned out to be well-suited for multi-domain environments because OAM functionalities such as tandem connection monitoring improve end-to-end monitoring of any type of service.
Edited by Peter Bernstein