1. ITU-T, Rec. Y.2001, General overview of NGN, December 2004.
2. ITU-T, Rec. Y.2111, Resource and admission control functions in next generation networks, September 2006.
3. Overview of ITU-T NGN QoS control;Song;IEEE Communications Magazine,2007
4. ITU-T, Rec. Y.2012, Functional requirements and architecture of the NGN, release 1, September 2006.
5. E. Mannie, RFC 3945 – Generalized Multi-Protocol Label Switching (GMPLS) Architecture, Tech. Rep., IETF, October 2004.