Residential Broadband Aggregation

Business Ethernet

Network Convergence

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Corrigent's CM-4000 Carrier Ethernet Transport Switch offers a cost-effective solution for delivering triple play services, providing service differentiation and performance guarantees for voice, data and IP video. It provides a scalable, resilient, and robust solution for content distribution networks.

Typical Broadband Network Architecture

The figure below shows the typical broadband network architecture. National content centers distribute content to regional sites over an IP network. A Layer-2 regional network is then used to distribute traffic from the local content insertion centers to the optical network edge, and from there to customers using different broadband access technologies such as DSL, PON and wireless technologies.

Corrigent's Solution and Value Proposition

Corrigent provides the most cost-effective and robust solution for the regional transport network. It relies on Carrier Ethernet transport technologies to provide the most bandwidth efficient and highly available solution for the distribution of IPTV and VOD content. Corrigent’s solution is illustrated in the figure below.

The following key aspects make Corrigent's Ethernet transport solution an ideal one for residential multi-play services:

• Availability and reliability – The CM-4000 and CM-100 were designed with no single point of failure. It relies on a fully redundant system architecture and it guarantees sub-50 ms protection switching under any circumstances (traffic load and configuration). It ensures sub-50 ms recovery from interface failure, controller module failure, network interfaces or common equipment including power and fans. Corrigent’s mass deployed products have proven better-than-six-nines availability levels in the field, surpassing the industry standard for availability by an order of magnitude.

• Scalability – Corrigent’s products were designed to efficiently transport data services. They take advantage of native multicasting capabilities in a ring topology (RPR) to reduce the bandwidth requirements for the distribution of IPTV traffic. Services such as VOD benefit from the ability to reclaim unused bandwidth and make efficient use of the bandwidth for guaranteed services (e.g. VOD) only when needed. This allows best effort services to take advantage of the available bandwidth when the demand for VOD services is not at its peak. Statistical multiplexing maximizes utilization of network resources at all times. When there is high VOD concurrency, for example, this enables all VOD streams to be statistically multiplexed with multicast channels and Internet access, allowing service providers to maximize the use of the network resources without requiring to expand capacity.

• Application awareness – Corrigent’s products provide class of service differentiation and guarantee end-to-end quality of experience (QoE). This facilitates the best solution for MOD as it allows the mapping of VOD and IPTV to a guaranteed or high priority class of service, therefore guaranteeing delay, delay variation and packet loss. Sophisticated Traffic Management mechanisms are used to maintain end-to-end separation between high priority traffic (e.g. VOD) and other types of service like Internet access.

• Ease of operation – Corrigent’s CM-View Network Management System (NMS) supports point and click provisioning of both point-to-point and multipoint services, considerably reducing the effort required to operate the content distribution network. Corrigent’s NMS also provides enhanced monitoring functionality of network elements and service operation allowing efficient and continuous network monitoring.

• Beyond Triple Play – Corrigent offers service providers a transport solution for the convergence of multimedia, TDM and Ethernet services over a single packet-optimized infrastructure, effectively reducing capital and operational expenditures and maximizing the return on investment. Corrigent's scalable transport architecture will enable service providers to offer new revenue-generating services, minimizing the cost of ownership leading towards extending the network's amortization period.