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Broadband Forum Unveils Trio Of ‘Critical’ Specs

12 марта 2009

The Broadband Forum has released three of what it calls “critical” technical reports dealing with various aspects of broadband deployment, ranging from migration from ATM to Ethernet-based networks to xDSL bonding and Quality of Service (QoS) issues for multi-service architectures.

The new specs “set a new bar for broadband architecture standards and flexible network deployment,” the Forum says, and they become a part of BroadbandSuite 3.0, which was unveiled late last year by the former DSL Forum that changed its name in 2008 to broaden its identity as a group encompassing not just one of the many broadband technologies extant.

The first of the three new specs amplifies one that previously provided the roadmap for moving from ATM access aggregation to an Ethernet-based architecture to define more detailed and specific requirements for such migrations using gigabit passive optical networks (GPON). The earlier spec, “Migration to Ethernet Access Aggregation,” was released in April 2006. Since then, the Forum says, it “has become a global standard for triple-play deployments for residential and business customers that use DSL as the broadband access technology.” However, the 2006 specification was access agnostic. Adding GPON-specific implementation specs will “reduce operational complexity and maximize equipment interoperability” the Forum says, and it will “ensure a more seamless integration of GPON into traditional broadband networks.”

The second new spec provides a framework for a Layer 2 Control Mechanism for helping to ensure QoS and service control when deploying value-added services across disparate broadband access networks. QoS and service control require a tight coordination between network nodes (such access nodes as Digital Subscriber Line Access Multiplexer (DSLAM) and broadband network gateways [BNG]), the Forum explains. It notes one possible solution: “Coordination between these network nodes could be performed by means of interworking via the management plane. However, this is not always possible because of organizational boundaries between business entities operating the local loop, the aggregation network and the IP network.”

It continues, “Further, management networks are usually not designed to transmit management data between the different entities in real time.”

The final new spec addresses “Management Framework for xDSL Bonding.” Basically, xDSL bonding is defined by various specs, but they don’t include a management framework. The Forum says it’s stepped in to fill that gap, citing xDSL bonding specifications that include: ITU-T recommendations G.998.1 (ATM-based multi-pair bonding), G.998.2 (Ethernet-based multi-pair bonding) and G.998.3 (multi-pair bonding using time division inverse multiplexing).

Источник: http://telecomweb.com

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