Summary

ITU-T Recommendation Y.2611 specifies a high-level architecture for future packet-based networks (FPBNs). This Recommendation also specifies the relationship between an FPBN and the NGN strata and the interfaces in an FPBN.

In order to be able to provide a full suite of services (examples of which include data, video and voice telephony services) to their customers, operators may need to utilize both connectionless packet switched (cl-ps) and connection-oriented packet-switched (co-ps) transport modes. This is because each mode is well suited to the transport of some services and not so well suited to the transport of others.

FPBNs provide the topmost layer(s) of the transport stratum as defined in ITU-T Recommendation Y.2011. The services mentioned above form part of the service stratum as defined in ITU-T Recommendation Y.2011.