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Location Formats in Convergence: Essential Applications and Strategies

Explore the significance of location formats in routing, dispatch, and billing applications. Learn about geodetic and civic address expressions, XML data formats, shape types, and identity rules.

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Location Formats in Convergence: Essential Applications and Strategies

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  1. ESW07Location Formats:Convergence Now or Not at all? James Winterbottom Andrew Corporation ESW07 10-12 April 2007

  2. Required Result • Ultimately location is required by an application. Current applications include: • Routing • Dispatch • Billing • Locations can be expressed in geodetic terms or in terms of a civic address • Ultimately applications seem to receive XML formatted data: • PIDF-LO • GML • MLP

  3. Geodetic locations • Binary intermediary formats: • 3GPP Geographical Area Description (GAD) TS-23.032 • RC-3825 and LLDP-MED LCI point representation. • XML representations • GML :- Geoshape profile, other profile • OMA-MLP (based on early GML)

  4. Civic Representations • Revised Civic for PIDF-LO • MSAG • Requires validation if it is going to be used for routing purposes. • How is this achieved? • Is it needed for dispatch?

  5. Required Shape Types • GAD currently supports: • Point (2d and 3d) • Ellipse • Ellipsoid • Ellipsoid Arc (Arc Band) • Circle • Polygon • MLP supports all of these. • Geoshape supports all these + • Prism (an extruded polygon) • Sphere • The NENA E2 interface only supports • Point (2d and 3d) • Circle • Sphere

  6. Velocity and Direction • These can be represented in GML • GAD supports encoding of these attributes also. • Are they Required? • When are they used?

  7. Identity and Usage Rules • IETF PIDF-LO is a container that provides a linkage between identity, location and a right to use location. • Right of access is determined directly by the Target • MLP is a protocol that includes data types. Location is requested for a device. The identity of the device is necessary for the location request. • Right of access is determined indirectly through a PPR

  8. Precision Requirements • How accurate does data need to be? • For routing • For dispatch • When is an area required over a point?

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