Instant access to PMC technology papers pertaining to Storage, Optical and Mobile Networks.

Latest White Paper

Benefits of OTN on Router Line Interfaces for Service Providers and OEMs [published: Oct 2015]

Abstract:The continued growth of big data, combined with enterprises migrating their workloads to the cloud, has resulted in IP traffic growing more than fivefold in the past 5 years. These packet services are managed by IP routers, which rely on optical transport networks to create the mesh that connects the routers together across a wide area network, as shown in Figure 1. While the traffic being managed by routers is generally packet based, optical transport networks rely on the Optical Transport Network (OTN) protocol, which was optimized for the needs of the service providers that manage the networks. The requirement to manage both the packet-based router network and the OTN-based optical transport network can create multiple challenges and inefficiencies. These networks are often managed by separate groups and treated as separate networks. However, the industry is working hard, via technologies such as Software Defined Networking (SDN), to bring the physical layer networks together and truly manage them end to end as one network. As a first step, there are significant benefits to be had by extending the leading optical transport protocol, OTN, to the router interface, as it has more robust end-to-end fault detection, fault isolation and performance monitoring capabilities than Ethernet. These capabilities both increase operational efficiencies and reduce capital expenditures. This paper will focus on the connectivity of IP routers to the optical transport network and discuss trade-offs between different solutions and key features of the router line interface.

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Enabling C-RAN: The Case for OTN Mobile Fronthaul [published: Mar 2015]

Abstract: Worldwide, mobile operators are investigating new architectures in the Radio Access Network as a means to increase capacity while reducing costs. The Cloud-RAN (C-RAN) architecture is a leading solution to this challenge. However, C-RAN brings with it a new challenge: how to deploy a cost-effective and carrier grade fronthaul network. Of the possible solutions, OTN-based mobile fronthaul is most aligned with mobile operators' performance objectives and technical requirements, yet there has been a lack of available solutions on the market. PMC-Sierra is introducing mobile fronthaul support on its HyPHY family of OTN processors with a series of innovative new capabilities that can be enabled as a simple software and firmware upgrade.

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Benefits of OTN in Transport SDN [published: Mar 2015]

Abstract: This whitepaper discusses the requirements for Optical Transport SDN, and how Optical Transport Network (OTN) architectures supporting OTN Switching add flexibility to deliver more dynamic network infrastructures for telecom service providers.

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"In-flight" Encryption in Service Provider Networks [published: Mar 2015]

Abstract: Driven by the exponential growth in traffic and the mass migration of enterprise and personal data to the cloud, the security of electronic communications is a priority issue faced by the service providers tasked with delivering the services driving today’s connected global economy. To address this problem, service providers must find a way to efficiently encrypt traffic ‘in-flight’, as it transits global networks, without compromising service quality. Securing end-to-end transport networks using OTN encryption brings a compelling new solution to the table. It offers a low latency, service & protocol agnostic implementation that makes efficient use of network bandwidth. Innovation in OTN processing silicon, uniquely led by PMC’s DIGI-G4, delivers against these requirements, while at the same time supporting flexible and scalable encryption service delivery models spanning OTN switched or point-to-point WDM optical transport networks.

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Best Practices for Improving Edge Buffering Bandwidth Fairness in SAS/SATA Storage Topologies [published: Dec 2014]

Abstract: This white paper discusses the recommended best practices for using 12 Gb/s SAS Edge Buffering to achieve improved performance and bandwidth fairness in 12 Gb/s SAS/SATA topologies using 6 Gb/s and 3 Gb/s SAS/SATA targets. The impacts and root causes of bandwidth unfairness are discussed with various sample topologies. A summary of best practices is provided in the conclusion.

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