ETSI - TS 100 392-18-4
Terrestrial Trunked Radio (TETRA); Voice plus Data (V+D) and Direct Mode Operation (DMO); Part 18: Air interface optimized applications; Sub-part 4: Net Assist Protocol 2 (NAP2)
|Publication Date:||1 July 2015|
The present document defines Net Assist Protocol 2 that is optimized for TETRA air interface. It defines services:
- allowing information to be passed to a location determining entity also called MS (Mobile Station);
- allowing a location determining entity to request assistance information to an assistance server.
The information passed to the location determining entity by the assistance server, when relevant, reflects the content and format of the equivalent information (navigation data) which passes from satellites to the location determining entity.
The protocol is capable of supporting more than one position determining technology. Presently it covers multiple GNSS, and is extensible to all network positioning methods.