et Architecture: An Overview, June 1994. 26 RFC 2474, Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers, IETF, December 1998. 27 RFC 3031, Multiprotocol Label Switching Architecture, IETF January 2001. 28 ITU-T Recommendation Y.1291, An Architectural Framework for Support of Quality of Service in Packet Networks, May 2004. 29 RFC 2205, Resource ReSerVation Protocol (RSVP), IETF, September 1997. 30 RFC 2475, An Architecture for Differentiated Services, IETF, 1998. 31 RFC 3209, RSVP-TE: Extensions to RSVP for LSP Tunnels, IETF, December 2001. 32 RFC 3212, Constraint-Based LSP Setup Using LDP, IETF, January 2002. 33 RFC 4124, Protocol Extensions for Support of DiffServ-aware MPLS Traffic Engi- neering, IETF, June 2005. 34 RFC 4364, BGP/MPLS IP Virtual Private Networks (VPNs), IETF, February 2006. References 35 ITU-T Recommendation Y.2770, Requirements For Deep Packet Inspection In Next Generation Networks, November 2012. 36 RFC 5102, Information Model for IP Flow Information Export, IETF, January 2008. 37 ITU-T Recommendation Y.2771, Framework for Deep Packet Inspection, July 2014. 38 ITU-T Supplement 8 to E.800 series, Guidelines for Inter-provider Quality of Service, November 2009. 39 ITU-T Recommendation Y.1545, Roadmap for the Quality of Service of Intercon- nected Networks That Use the Internet Protocol, May 2013. 40 Janevski, T. (2003). Traffic Analysis and Design of Wireless IP Networks. Norwood, MA: Artech House. 41 ITU-T Technical Paper, How to Increase QoS/QoE of IP-based Platform(s) to Regionally Agreed Standards, March 2013. QoS in NGN and Future Networks The quality of service is always defined end-to-end. The traditional approach in ICT worlds is based on support of end-to-end QoS in the networks by using globally accepted standards, such as ITU standards for telephony. However, the Internet has changed the telecom game by separating network on to one side and services on the other side, which provided the possibility to invent new services on the run without the n