The present document specifies the stage 2 of the UE Positioning function of UTRAN, which provides the mechanisms
to support the calculation of the geographical position of a UE. UE position knowledge can be used for example in
support of Radio Resource Management functions, location-based services for operators, subscribers and third party
service providers. The purpose of this stage 2 specification is to define the UTRAN UE Positioning architecture,
functional entities and operations to support positioning methods. This description is confined to the UTRAN Access
Stratum. It does not define nor describe how the results of the UE position calculation can be utilised in the Core
Network (e.g. LCS) or in UTRAN (e.g. RRM).
UE Positioning may be considered as a network provided enabling technology consisting of standardised service
capabilities, which enable the provision of location applications. The application(s) may be service provider specific.
The description of the numerous and varied possible location applications which are enabled by this technology are
outside the scope of the present document. However, clarifying examples of how the functionality being described may
be used to provide specific location services may be included.
This stage 2 specification covers the UTRAN positioning methods, state descriptions, and message flows to support UE
full Table of Contents for TS 25.305 Word version: 15.0.0