
Method Tokens  - per [RFC4119]
These tokens are associated with the PIDF-LO object.
Any party may register new 'method' tokens with the IANA as 
needed on a first-come-first-serve basis.

(last updated 19 July 2006)

Token                   Description                                          Reference
---------------         -------------------------------------------------    ---------
A-GPS                   GPS with assistance                                  [RFC4119]
AOA                     Angle of Arrival                                     [Winterbottom] 
Cell                    Location of the cellular radio antenna               [RFC4119]
Device-Assisted_A-GPS   Device provides psuedo-ranges to a network element   [Winterbottom] 
                        that computes the location
Device-Assisted_EOTD    Enhanced Observed Time Difference, device provides   [Winterbottom] 
                        measurements, network element computes location 
Device-Based_A-GPS      Network provides psuedo-ranges to the device and     [Winterbottom] 
                        the device computes its location           
Device-Based_EOTD       Enhanced Observed Time Difference, network element   [Winterbottom] 
                        provides measurements and device computes location         
DHCP                    Provided by DHCP (used for wireline access           [RFC4119]
                        networks, see 802.11 below)
GPS                     Global Positioning System                            [RFC4119] 
Handset_AFLT            Advanced Forward Link Trilateration                  [Winterbottom] 
Handset_EFLT            Enhanced Forward Link Trilateration                  [Winterbottom] 
Hybrid_A-GPS            Device provides psuedo-rangesto a network element    [Winterbottom] 
                        that computes the location in combination with 
                        network measurements                        
IPDL                    Idle Period Down Link                                [Winterbottom] 
LLDP-MED                Provided by Link Layer Discovery Protocol - Media    [ANSI/TIA-1057] [Blatherwick]
                        Endpoint Discovery (LLDP-MED)
Manual                  Entered manually by an operator or user, e.g.,       [RFC4119]
                        based on subscriber billing or service location 
                        information
NMR                     Network Measurement Reports                          [Winterbottom] 
OTDOA                   Observed Time Difference of Arrival                  [Winterbottom] 
RFID                    Proximity to a Radio Frequency Identification        [Winterbottom] 
                        beacon 
RTT                     Round Trip Time                                      [Winterbottom] 
TA                      Timing Advance                                       [Winterbottom] 
TA-NMR                  Timing Advance and Network Measurement Reports       [Winterbottom] 
Triangulation           Triangulated from time-of-arrival, signal strength   [RFC4119]
                        or similar measurements
UTDOA                   Uplink Time Difference of Arrival                    [Winterbottom] 
Wiremap                 Location determined using wiremap correlations to    [Winterbottom] 
                        ciruit identifiers
802.11                  802.11 access point (used for DHCP-based             [RFC4119]
                        provisioning over wireless access networks)

REFERENCES
----------
[ANSI/TIA-1057]         Telecommunications Industry Association, "Link Layer Discovery
                        Protocol for Media Endpoint Devices", ANSI/TIA-1057, April 2006.
[RFC4119]               J. Peterson, "A Presence-based GEOPRIV Location Object Format",
                        RFC 4119, December 2005.

PEOPLE
----------
[Blatherwick]           Peter Blatherwick, <peter_blatherwick@mitel.com>, 19 July 2006. 
[Winterbottom]          James Winterbottom, <james.winterbottom@andrew.com>, 22 March 2006.

(created 03 November 2004)

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