scope:

This document defines the protocol requirements for the Lbis interface that supports the UTDOA positioning method for emergency calls. Because the Lbis interface is primarily an extension of the Lb interface to a remote PDE, the relevant Lb interface is also reviewed in detail. The node procedure associated with the transmission and reception of UTDOA messages is also defined in this document. This document shall be used in conjunction with the UTDOA Architecture and Functional Description document.

Purpose

This document provides details of the Lbis interface and the RPP protocol sufficient to permit implementation of the protocol in a GSM system. The document is a Technical Report, and not a Technical Specification, because details of the PDE implementation are not typically addressed as part of the 3GPP specifications. Note that the information specific to the Lb interface is informative only, since the Lb interface parameters needed for UTDOA are now incorporated in 3GPP TS 48.071 v6.3.0.

Application

The application of this open interface is typically to North American GSM networks using UTDOA in support of E911 Phase 2 emergency services.