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Triple Play Services

Corrigent's CM-100 Packet Transport Switch (PTS) is the most advanced packet transport solution available in the market. It offers a cost-effective solution for delivering triple play services including voice, data and IP video. Compared to carrier Ethernet and MSPP solutions, the CM-100 PTS offers the most flexible, scalable and highly available solution in the market today.

Typical Triple Play Architecture
The figure below shows the typical Triple Play architecture. National content centers distribute content to regional sites using the IP network. The L2 regional network is then used to distribute traffic from the local content insertion centers to the customers using broadband access technologies including DSL, PON and 3G wireless.

Corrigent provides the most efficient solution for the regional transport network. It relies on RPR and packet transport technology to provide the most bandwidth efficient and highly available solution for the distribution of IPTV and VOD content. This is illustrated in the figure below.

Among the key aspects that make Corrigent's packet transport solution an ideal one for triple play services we have the following:

  • Availability and Reliability - The CM-100 was 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, main processing module (MPM) failure, network interfaces or common equipment including power and fans.

  • Scalability - The CM-100 was designed to efficiently transport data services. Relying on RPR's shared media, the CM-100 PTS takes advantage of the RPR native multicasting capabilities to reduce the bandwidth requirements for the distribution of IPTV traffic. Services such as VOD benefit from the CM-100's ability to reclaim unused bandwidth and make efficient use of the bandwidth for guaranteed services (e.g. VOD) when needed only. This allows best effort services to take advantage of the available bandwidth when the demand for VOD services is not at its peak.

  • Quality of service - The CM-100 provides class of service differentiation based on four RPR-based classes of service including high priority (HP), two levels of guaranteed services (G1 and G2) and best effort (BE). It offers 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.

  • Traffic management - The CM-100 relies on RPR traffic management to guarantee performance of HP and guaranteed services. VOD and IPTV traffic can take advantage of Corrigent's dual transit buffer implementation, which maintains separation between HP traffic (e.g. VOD) and other types of service like Internet access.

  • Fairness and bandwidth reclamation - Through standard RPR fairness, the CM-100 guarantees all types of traffic will have fair access to the network, effectively guaranteeing services will receive the amount of bandwidth customers pay for independent of traffic congestion. It allows for bandwidth to be reclaimed by any class of traffic when underutilized, for example, traffic allocated for VOD services can be used by IPTV and Internet access when not in used.

  • Statistical multiplexing - RPR creates a shared media over the transport infrastructure. IPTV and VOD are transported over a packet infrastructure that allows for the statistical multiplexing of data traffic therefore maximizing utilization of the 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.

  • Spatial reuse - RPR enables the concurrent use of non-overlapping ring segments. This, together with statistical multiplexing over the shared media, enables maximum bandwidth utilization in situations where traffic is asymmetric, distributed or services are configured as, e.g., hub and spoke as in the case of VOD.

  • Flexible protection - The CM-100 supports all RPR standard protection mechanisms (not other vendor supports all standard methods). It also provides a way of providing protection per service and per direction. HP services like IPTV can be wrapped, therefore minimizing packet loss, whereas VoIP services can be steered, which would minimize delay and delay variation, even when both services come from the same customers. This effectively minimizes the effects of the protection event consistent with the services' requirements.

  • Beyond Triple Play - Corrigent offers service providers a transport solution for the convergence of multimedia, TDM and Ethernet services over a single packet transport infrastructure, effectively reducing capital and operational expenditures and maximizing the return on investment. Corrigent's data-optimized 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.