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ITU-T Y.2111 (11/2011)

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Resource and admission control functions in next generation networks
Recommendation ITU-T Y.2111 specifies the functional architecture and requirements for the
resource and admission control functions (RACF) in next generation networks (NGN), which may
involve a variety of access and core transport technologies and multiple domains. The RACF
provides real-time application-driven and policy-based transport resource management in support of
end-to-end quality of service (QoS), gate control, network address translation, and traversal of
remote network address translators. The RACF is not service-specific. Services can make use of
RACF whether the IP multimedia subsystem is involved or not.
In particular, this edition of Recommendation ITU-T Y.2111 includes extensions to the 2008 edition
to address issues related to the interaction with 3GPP policy control functionalities, resource and
admission control between NGNs and RACF-unaware IP networks, wholesale, time-shifted TV
services, QoS downgrading, mobility, resource and admission control based on user subscription
profile, support of deep packet inspection (DPI), communication between RACF and management of
performance measurement (MPM), policy-based charging control, and IPTV service by invitation.

Approval date: 2011-11-29
Provisional name:Y.RACF
Approval process:AAP
Status: In force
Maintenance responsibility: ITU-T Study Group 13
Further details: Patent statement(s)
Development history
Ed. ITU-T Recommendation Status Summary Table of Contents Download
3 Y.2111 (11/2011) In force
2 Y.2111 (11/2008) Superseded
1 Y.2111 (09/2006) Superseded