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 Monday, October 02, 2006
ITU-T Recommendation Y.2111, a new standard emerging from the July NGN-GSI meetings addresses a key area of concern in NGN, the ability to offer end-to-end QoS. Crucially it also addresses the need to be able to differentiate multiple services running over the same network.

The Recommendation deals with resource and admission control functions (RACF) which will help enable operators to guarantee end-to-end quality for multimedia services in NGN, for example VoIP and IPTV. Key to the approach is the ability for an operator to specify rules to specific communication types in order that they can better allocate network resources.

With most IP networks today operating under a best-effort system, network congestion can significantly undermine the quality and reliability of more advanced multimedia applications. RACF meets the demand for more intelligent control of packet-based network infrastructures.

The Recommendation defines the related requirements and functional architecture covering aspects such as resource reservation, admission control and gate control, Network Address Port Translation (NAPT) and firewall control, and Network Address Translator (NAT) traversal.