scope:

The present document defines the requirements for data elements that may need to be exchanged within the GBLS and externally to applications using the GBLS.

The present document also specifies data exchange models for these data elements which may form the basis of protocols (or for modification of protocols) and which may be used for the exchange of location-related data within complex GBLS, as well as between the GBLS and external applications.

The present document defines the procedures and messages associated with these data exchange models.

The GBLS data exchange models are defined to be independent of their underlying transport mechanisms. Nevertheless, on certain GBLS interfaces, transport protocols are recommended.

ETSI TS 103 246 parts 1 [1], 2 [2], 3 [3] and 5 [i.8] address integrated GNSS based location systems (GBLS) that combine Global Navigation Satellite Systems (GNSS), with other navigation technologies, as well as with telecommunication networks in order to deliver location-based services to users. As a consequence the present document is not applicable to GNSS only receivers.

ETSI TS 103 246 parts 1 [1], 2 [2], 3 [3] and 5 [i.8] propose a list of functional and performance requirements and related test procedures. For each performance requirement, different classes are defined allowing the benchmark of different GBLS addressing the same applications.