Summary

Recommendation ITU-T Q.3221 provides the signalling requirements and protocol for the interface between the service control entities (SCEs) in the services stratum and the transport location management physical entity (TLM-PE) in the network attachment control function block of the next generation network (NGN) release 1. This protocol can be used to retrieve the location information attached by the user equipment. It satisfies the requirements for information flows across the S-TC1 reference point as specified in Recommendation ITU‑T Y.2014.