This document describes P25 Location Services including a brief summary of the solution (Section 2), document suite (Section 3), and its architecture (Section 2.2 2).

The document describes a two-tiered approach to providing location services. See section 2 for a summary of the two tiers.

The functional scope of the location service as described herein covers functionality described in TIA-102 [11] section 2.3.3.4.

Note that group-oriented Location Services are not supported at this time. The transport mechanisms for group data have not been completed, so there is no mechanism to send group-addressed application data. The protocols described in the P25 Location Service documentation suite have to be able to expand to allow group-oriented operation when the transport mechanisms are available.

Note also that a trunking control channel message to report location might also be desired for those systems that do not support the generic packet data service. This messaging is not described in this document, but will be the subject of an addendum to the Trunking document suite if it is introduced.