Internet Assigned Numbers Authority Method Tokens Created 2004-11-03 Last Updated 2022-09-15 Available Formats [IMG] XML [IMG] HTML [IMG] Plain text Registry included below * Method Tokens Method Tokens Registration Procedure(s) First Come First Served Reference [RFC4119] Note These tokens are associated with the PIDF-LO object. Available Formats [IMG] CSV Token Description Reference Registration Date A-GNSS Assisted Global Navigation Satellite Systems [Brian_Rosen] 2018-12-07 A-GPS GPS with assistance [RFC4119] AOA Angle of Arrival [James_Winterbottom] best-guess The LIS cannot provide an accurate location. The [Brian_Rosen] 2012-01-11 value is its best guess, but may be very inaccurate. Cell Location of the cellular radio antenna [RFC4119] DBH Device-Based Hybrid [Apple] 2019-03-21 A Device-Based Hybrid system (typically on a mobile device) produces a compound location that includes a full or partial Civic Address in addition to the Geodetic Location normally expected from a DBH DBH2 system. Distinct from RevGeo because, even if the [NENA-REQ-003.1-2022][Tom_Hsu] 2022-09-15 DBH system uses reverse-geocoding to determine the Civic Location, the DBH system determines and delivers the Civic Location, not a downstream entity. DBH_HELO Device-Based Hybrid using Apple Hybridized Emergency [Apple] 2019-03-21 Location This value is intended to represent a location Derived object determined by geocoding or reverse geocoding [Brian_Rosen] 2008-07-15 a location determined by some other method. A full or partial Civic Location, which is not validated against an LVF, is derived by reversegeocoding a Geodetic Location. The original Geodetic Location MUST also be delivered with the Derived-RevGeo derived Civic Location. Used when a downstream [NENA-REQ-003.1-2022][Tom_Hsu] 2022-09-15 entity other than the calling device reverse-geocodes a Geodetic Location it received from an upstream entity, such as location services/DBH. A full or partial Civic Location, which is validated DerivedRevGeo-LVF against an LVF, is derived by reverse-geocoding a [NENA-REQ-003.1-2022][Tom_Hsu] 2022-09-15 Geodetic Location. Device-Assisted_A-GPS Device provides psuedo-ranges to a network element [James_Winterbottom] that computes the location Device-Assisted_EOTD Enhanced Observed Time Difference, device provides [James_Winterbottom] measurements, network element computes location Device-Based_A-GPS Network provides psuedo-ranges to the device and the [James_Winterbottom] device computes its location Device-Based_EOTD Enhanced Observed Time Difference, network element [James_Winterbottom] provides measurements and device computes location DHCP Provided by DHCP (used for wireline access networks, [RFC4119] see 802.11 below) E-CID Enhanced Cell Identifier [Brian_Rosen] 2018-12-07 ELS-BLE Civic Address representing the associated location [ATIS-0700028.v002][Roger_Marshall] 2019-04-22 of the UE based upon the Bluetooth beacon from ELS Civic Address representing the associated location ELS-WiFi of the UE based upon the referenced Wi-Fi Access [ATIS-0700028.v002][Roger_Marshall] 2019-04-22 Point from ELS GNSS Global Navigation Satellite Systems [Brian_Rosen] 2018-12-07 GPS Global Positioning System [RFC4119] Handset_AFLT Advanced Forward Link Trilateration [James_Winterbottom] Handset_BLE Bluetooth based X,Y position, using beacon proximity [NENA-STA-010.3-2021][Brian_Rosen] 2022-05-12 with varying power and coverage levels Handset_EFLT Enhanced Forward Link Trilateration [James_Winterbottom] Handset_WiFi WLAN based X,Y position, using beacon proximity or [NENA-STA-010.3-2021][Brian_Rosen] 2022-05-12 ranging methods Device provides psuedo-rangesto a network element Hybrid_A-GPS that computes the location in combination with [James_Winterbottom] network measurements hybridAGPS_AFLT Hybrid of Assisted GPS and Advanced Forward Link [Brian_Rosen] 2018-12-07 Trilateration hybridCellSector_AFLT Positioning based on combining information from [NENA-STA-010.3-2021][Brian_Rosen] 2022-05-12 multiple cells or sectors hybridCellSector_AGPS Hybrid of Cell/Sector based and Assisted GPS [Brian_Rosen] 2018-12-07 Positioning based on the combination of OTDOA and hybridOTDOA_A-GNSS multiple constellations (GPS, GLONASS, Galileo, [NENA-STA-034.1-2021][Brian_Rosen] 2022-05-12 etc.) hybridOTDOA_AGPS Positioning based on the combination of OTDOA and [NENA-STA-034.1-2021][Brian_Rosen] 2022-05-12 AGPS measurements Network-centric positioning method based on a hybridRFPatternMatch_AGPS combination of radio link measurements collected [NENA-STA-010.3-2021][Brian_Rosen] 2022-05-12 from the network and/or the device and AGPS Positioning based on the combination of TDOA and hybridTDOA_A-GNSS multiple constellations (GPS, GLONASS, Galileo, [NENA-STA-010.3-2021][Brian_Rosen] 2022-05-12 etc.) hybridTDOA_AOA Hybrid of Time Difference of Arrival and Angle of [Brian_Rosen] 2018-12-07 Arrival hybridTDOA_AGPS Hybrid of Time Difference of Arrival and AGPS [Brian_Rosen] 2018-12-07 hybridTDOA_AGPS_AOA Hybrid of Time Difference of Arrival, Assisted GPS [Brian_Rosen] 2018-12-07 and Angle of Arrival hybridWiFi_AGPS Positioning in the network based on the combination [NENA-STA-010.3-2021][Brian_Rosen] 2022-05-12 of Wi-Fi and AGPS measurements IPDL Idle Period Down Link [James_Winterbottom] [Telecommunications Industry Association, "Link LLDP-MED Provided by Link Layer Discovery Protocol - Media Layer Discovery Protocol for Media Endpoint Endpoint Discovery (LLDP-MED) Devices", ANSI/TIA-1057, April 2006.][Peter_Blatherwick] Entered manually by an operator or user, e.g., based Manual on subscriber billing or service location [RFC4119] information A Civic Location is derived by knowledge that the calling device is connecting via a semi-static Manual-FIXED small-cell device that is at a known, validated, [NENA-REQ-003.1-2022][Tom_Hsu] 2022-09-15 address, such as a pico/femtocell or that the calling device is a fixed cellular device. A Civic Location is provided using knowledge that Manual-RESD the calling device is a static device at a known, [NENA-REQ-003.1-2022][Tom_Hsu] 2022-09-15 validated, residential address. MBS Metropolitan Beacon System [NextNav] 2017-05-25 MPL Measured Path Loss [James_Winterbottom] 2007-10-18 Civic Address representing the provisioned location NEAD-BLE of a Bluetooth beacon to support the dispatching of [ATIS-0700028][Roger_Marshall] 2016-05-12 emergency services. Civic Address representing the provisioned location NEAD-WiFi of a Wi-Fi Access Point to support the dispatching [ATIS-0700028][Roger_Marshall] 2016-05-12 of emergency services. networkRFFingerprinting Network Based RF Fingerprinting [Brian_Rosen] 2018-12-07 networkTDOA Network Based Time Difference of Arrival [Brian_Rosen] 2018-12-07 networkTOA Network Based Time of Arrival [Brian_Rosen] 2018-12-07 NMR Network Measurement Reports [James_Winterbottom] OTDOA Observed Time Difference of Arrival [James_Winterbottom] A Civic Location is provided using knowledge that the caller is at or near a specific registered address for that person’s identity and/or their Proximity device, such as determining by analyzing the [NENA-REQ-003.1-2022][Tom_Hsu] 2022-09-15 caller’s Geodetic Location that they are at their registered home address or that they are placing a call from their home Wi-Fi. RFID Proximity to a Radio Frequency Identification beacon [James_Winterbottom] RSSI Received Signal Strength Indicator [James_Winterbottom] 2007-10-18 Combination of Received Signal Strength Indicator RSSI-RTT and Round Trip Time used to determine the location [James_Winterbottom] 2007-10-18 of the Target RTT Round Trip Time [James_Winterbottom] TA Timing Advance [James_Winterbottom] TA-NMR Timing Advance and Network Measurement Reports [James_Winterbottom] Triangulation Triangulated from time-of-arrival, signal strength [RFC4119] or similar measurements UTDOA Uplink Time Difference of Arrival [James_Winterbottom] Wiremap Location determined using wiremap correlations to [James_Winterbottom] ciruit identifiers 802.11 802.11 access point (used for DHCP-based [RFC4119] provisioning over wireless access networks) Contact Information ID Name Contact URI Last Updated [Apple] Apple, Inc. mailto:helo&group.apple.com 2019-03-21 [Brian_Rosen] Brian Rosen mailto:br&brianrosen.net 2022-05-12 [James_Winterbottom] James Winterbottom mailto:james.winterbottom&andrew.com 2007-10-18 [NextNav] NextNav mailto:info&NextNav.com 2017-05-25 [Peter_Blatherwick] Peter Blatherwick mailto:peter_blatherwick&mitel.com 2006-07-19 [Roger_Marshall] Roger Marshall mailto:roger.marshall&comtechtel.com 2019-04-22 [Tom_Hsu] Tom Hsu mailto:tom.hsu&nokia.com 2022-09-15 Licensing Terms