ABSTRACT: Issue 2 of GR-3130, Location Validation Database (VDB) Generic Requirements in Support of E9-1-1 Service, replaces Issue 1.
The National Emergency Number Association (NENA) is in the process of defining a suite of solutions to enable emergency calls
originated by Voice over Internet Protocol (VoIP) users to be routed to the appropriate Public Safety Answering Point (PSAP) for the
geographic location from which the call was originated. The Long-Term Definition Working Group (LTD WG) of NENA is defining an
architecture for an end-to-end Internet Protocol (IP) solution, referred to as an i3 Solution. The VoIP Migratory Working Group (VMWG)
of NENA has defined a near-term solution that provides for migration toward the long-term view, while making use of the existing
conventional E9-1-1 System Service Provider infrastructure. This is referred to as the i2 Solution. A revised version, referred to
during its development stage as i2.5, is nearing completion for expected publication by early 2008. This GR reflects the revised i2
The i2 Solution defined by the NENA VMWG includes a number of new functional elements to enable the pre-validation of location
information, as well as the routing of VoIP-originated emergency calls and the delivery of the associated call and location-related
information to the PSAP. These new elements and the associated terminology are described this document. The critical network element
that supports validating the location information that will be used subsequently to route a VoIP emergency call is called the
Validation Database (VDB).
This document provides generic requirements for the functions and interfaces that must be supported by a VDB as a key element of the
NENA i2 Solution. Many of the functions of the VDB described in this GR are expected to be extensible for support of location
validation in the i3 Solution also.
This GR addresses the requirements on the VDB to process and respond to location validation requests received from any of the
following three different types of entities:
Location Information Server (LIS)
VoIP Service Provider (VSP)
End user application.
This document has been reissued to align with current NENA documents. Changes have been made to:
Clarify entities that perform address validation
Describe use of the Emergency Routing Tuple (ERT) and provide more detail for Root Discovery consistent with the changes planned
for Issue 2 of NENA 08-001, Interim VoIP Architecture for Enhanced 9-1-1 Services (i2)
Alignment with NENA 02-013, NENA Data Standards for the Provisioning and Maintenance of MSAG Files to VDBs and ERDBs, regarding use
of MSAG data to populate the VDB database.
This GR also includes one or more Issue List Reports (ILRs) that detail open or closed technical issues in the main document. The
ILR(s) are automatically sent free of charge to the GR document purchaser. Components of this product are: