Internet Assigned Numbers Authority • Domains • Protocols • Numbers • About Method Tokens Created 2004-11-03 Last Updated 2022-09-15 Available Formats [IMG] XML [IMG] HTML [IMG] TXT Registry Included Below • Method Tokens Method Tokens Registration Procedure(s) First Come First Served Reference [RFC 4119] 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 [RFC 4119] AOA Angle of Arrival [James_Winterbottom] best-guess The LIS cannot provide an accurate location. The value is its [Brian_Rosen] 2012-01-11 best guess, but may be very inaccurate. Cell Location of the cellular radio antenna [RFC 4119] 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 DBH2 expected from a DBH system. Distinct from RevGeo because, even [NENA-REQ-003.1-2022]; [Tom_Hsu] 2022-09-15 if the 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 Location [Apple] 2019-03-21 This value is intended to represent a location object determined Derived by geocoding or reverse geocoding a location determined by some [Brian_Rosen] 2008-07-15 other method. A full or partial Civic Location, which is not validated against an LVF, is derived by reversegeocoding a Geodetic Location. The Derived-RevGeo original Geodetic Location MUST also be delivered with the [NENA-REQ-003.1-2022]; [Tom_Hsu] 2022-09-15 derived Civic Location. Used when a downstream entity other than the calling device reverse-geocodes a Geodetic Location it received from an upstream entity, such as location services/DBH. DerivedRevGeo-LVF A full or partial Civic Location, which is validated against an [NENA-REQ-003.1-2022]; [Tom_Hsu] 2022-09-15 LVF, is derived by reverse-geocoding a Geodetic Location. Device-Assisted_A-GPS Device provides psuedo-ranges to a network element that computes [James_Winterbottom] the location Device-Assisted_EOTD Enhanced Observed Time Difference, device provides measurements, [James_Winterbottom] network element computes location Device-Based_A-GPS Network provides psuedo-ranges to the device and the device [James_Winterbottom] computes its location Device-Based_EOTD Enhanced Observed Time Difference, network element provides [James_Winterbottom] measurements and device computes location DHCP Provided by DHCP (used for wireline access networks, see 802.11 [RFC 4119] below) E-CID Enhanced Cell Identifier [Brian_Rosen] 2018-12-07 ELS-BLE Civic Address representing the associated location of the UE [ATIS-0700028.v002]; [Roger_Marshall] 2019-04-22 based upon the Bluetooth beacon from ELS ELS-WiFi Civic Address representing the associated location of the UE [ATIS-0700028.v002]; [Roger_Marshall] 2019-04-22 based upon the referenced Wi-Fi Access Point from ELS GNSS Global Navigation Satellite Systems [Brian_Rosen] 2018-12-07 GPS Global Positioning System [RFC 4119] Handset_AFLT Advanced Forward Link Trilateration [James_Winterbottom] Handset_BLE Bluetooth based X,Y position, using beacon proximity with [NENA-STA-010.3-2021]; [Brian_Rosen] 2022-05-12 varying power and coverage levels Handset_EFLT Enhanced Forward Link Trilateration [James_Winterbottom] Handset_WiFi WLAN based X,Y position, using beacon proximity or ranging [NENA-STA-010.3-2021]; [Brian_Rosen] 2022-05-12 methods Hybrid_A-GPS Device provides psuedo-rangesto a network element that computes [James_Winterbottom] the location in combination with network measurements hybridAGPS_AFLT Hybrid of Assisted GPS and Advanced Forward Link Trilateration [Brian_Rosen] 2018-12-07 hybridCellSector_AFLT Positioning based on combining information from multiple cells [NENA-STA-010.3-2021]; [Brian_Rosen] 2022-05-12 or sectors hybridCellSector_AGPS Hybrid of Cell/Sector based and Assisted GPS [Brian_Rosen] 2018-12-07 hybridOTDOA_A-GNSS Positioning based on the combination of OTDOA and multiple [NENA-STA-034.1-2021]; [Brian_Rosen] 2022-05-12 constellations (GPS, GLONASS, Galileo, etc.) hybridOTDOA_AGPS Positioning based on the combination of OTDOA and AGPS [NENA-STA-034.1-2021]; [Brian_Rosen] 2022-05-12 measurements Network-centric positioning method based on a combination of hybridRFPatternMatch_AGPS radio link measurements collected from the network and/or the [NENA-STA-010.3-2021]; [Brian_Rosen] 2022-05-12 device and AGPS hybridTDOA_A-GNSS Positioning based on the combination of TDOA and multiple [NENA-STA-010.3-2021]; [Brian_Rosen] 2022-05-12 constellations (GPS, GLONASS, Galileo, etc.) hybridTDOA_AOA Hybrid of Time Difference of Arrival and Angle of Arrival [Brian_Rosen] 2018-12-07 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 and Angle of [Brian_Rosen] 2018-12-07 Arrival hybridWiFi_AGPS Positioning in the network based on the combination of Wi-Fi and [NENA-STA-010.3-2021]; [Brian_Rosen] 2022-05-12 AGPS measurements IPDL Idle Period Down Link [James_Winterbottom] [Telecommunications Industry Association, LLDP-MED Provided by Link Layer Discovery Protocol - Media Endpoint "Link Layer Discovery Protocol for Media Discovery (LLDP-MED) Endpoint Devices", ANSI/TIA-1057, April 2006.]; [Peter_Blatherwick] Manual Entered manually by an operator or user, e.g., based on [RFC 4119] subscriber billing or service location information A Civic Location is derived by knowledge that the calling device Manual-FIXED is connecting via a semi-static small-cell device that is at a [NENA-REQ-003.1-2022]; [Tom_Hsu] 2022-09-15 known, validated, address, such as a pico/femtocell or that the calling device is a fixed cellular device. A Civic Location is provided using knowledge that the calling Manual-RESD device is a static device at a known, validated, residential [NENA-REQ-003.1-2022]; [Tom_Hsu] 2022-09-15 address. MBS Metropolitan Beacon System [NextNav] 2017-05-25 MPL Measured Path Loss [James_Winterbottom] 2007-10-18 Civic Address representing the provisioned location of a NEAD-BLE Bluetooth beacon to support the dispatching of emergency [ATIS-0700028]; [Roger_Marshall] 2016-05-12 services. NEAD-WiFi Civic Address representing the provisioned location of a Wi-Fi [ATIS-0700028]; [Roger_Marshall] 2016-05-12 Access Point to support the dispatching 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 Proximity identity and/or their device, such as determining by analyzing [NENA-REQ-003.1-2022]; [Tom_Hsu] 2022-09-15 the 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 RSSI-RTT Combination of Received Signal Strength Indicator and Round Trip [James_Winterbottom] 2007-10-18 Time used to determine the location 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 or similar [RFC 4119] measurements UTDOA Uplink Time Difference of Arrival [James_Winterbottom] Wiremap Location determined using wiremap correlations to ciruit [James_Winterbottom] identifiers 802.11 802.11 access point (used for DHCP-based provisioning over [RFC 4119] 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