1. Location Presentation
Month Year
doc.: IEEE yy/xxxxr0
March, 2006
Location Presentation
Authors:
Date:
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D. Stanley (Aruba Networks)
John Doe, Some Company

2. Month Year
doc.: IEEE yy/xxxxr0
March, 2006
Abstract
This location solution provides a mechanism for a STA to receive instructions from the network for providing presence indications, to alert the network of its presence, and to receive location updates from the network. No specific location determination mechanism is defined or required.
D. Stanley (Aruba Networks)
John Doe, Some Company

3. Location Proposal Goals
March, 2006
Location Proposal Goals
Support a variety of end devices
Provide wireless clients with the ability announce their presence
Enable presence based applications
Support multiple location-based services
Enable WLAN infrastructure to provide location services to any wireless client
Support “Location Aware” Clients
Client applications that become more aware of their physical location
Location format options are required -No one format fits all needs
Support multiple location-calculation algorithms
Interoperate with legacy clients
D. Stanley (Aruba Networks)

4. The Solution: 3 Main Categories
March, 2006
The Solution: 3 Main Categories
Configuration
Setting up and receiving measurement parameters
Presence
Basic measurement and announcement
Location
The location data calculated from the raw measurements
Location data provided to STA
D. Stanley (Aruba Networks)

5. Category #1: Configuration
March, 2006
Category #1: Configuration
Presence Configuration Request Frame
Provides ability to setup STA Presence Indication parameters and channels
Provides ability to setup STA “normal” and “in-motion” reporting intervals
Provides ability to receive motion-related information
Provides ability to control channels on which the STA announces its Presence
Presence Configuration Response Frame
Acknowledges successful or failed presence configuration request
Status allows STA to indicate refusal, failure or incapable
Upon failed presence configuration request, provides current reporting parameters
D. Stanley (Aruba Networks)

6. March, 2006
Category #2: Presence
“I am out here” (without defining “here”) rather than “Here I am”
New Presence Parameters Information Element (IE)
New Presence Request Frame, contains
Presence parameters
Dialog token for transactions
New Presence Response Frame, contains
D. Stanley (Aruba Networks)

7. Presence Parameters Information Element
March, 2006
Presence Parameters Information Element
Identifier
Field Name 1
Presence Indication Parameters 2
Presence Indication Channels 3
Presence Request Options 4
Presence Status 5
Location Service Parameters 6
Radio Information 7
Timing Measurements 8
Motion 9
Location Descriptor 10
Location Data 11
Location ID
12-254
Reserved
255
Vendor Specific
D. Stanley (Aruba Networks)

8. March, 2006
Beacon Frame Example AP
STA
Beacon ( Presence Parameters Element[ Presence Indication Parmeters,
Presence Indication Channels) ]
The combination of a Presence Indication Parameters field and a Presence Indication Channels field broadcast in a beacon allow a device to discover the information required to bootstrap itself to send presence frames prior to association.
D. Stanley (Aruba Networks)

9. Location Determination Example
March, 2006
Location Determination Example
Example -Time of arrival AP
STA
Unicast Presence Request Sent at T1, received at T2
ACK, sent at T3, Received at T4
Presence Response [ Timing Measurements Element with
Timestamp Difference = (T3-T2) ]
STA can then calculate [ (T4-T1) – (T3-T2)]/2
D. Stanley (Aruba Networks)

10. Category #3: Location Services
March, 2006
Category #3: Location Services
Infrastructure can provide location for itself or associated STA.
STA can announce location if STA is capable of calculating its location
Location Descriptor
Used to describe the location data being requested or responded to
Location Data
Used to contain the location data
Location Service Parameters
Used to request or announce location services
D. Stanley (Aruba Networks)

11. Location Descriptor Options
March, 2006
Location Descriptor Options
Format
What forms can location be provided in…
CIVIC
Geospatial (GEO)
Resolution
What resolution can location be resolved to…
Building AP XY
Encoding
What encoding messages are constructed using…
LCI
Text
ASN.1
D. Stanley (Aruba Networks)

12. One-Time Network Provided Location Example
March, 2006
One-Time Network Provided Location Example
STA sends unicast Presence Request frame with Location Descriptor field
Location Descriptor includes attributes of the requested location data:
Location Subject = Local
Format
Encoding
Resolution
Infrastructure validates that the request came from allowed client and that the requested attributes match network capabilities.
D. Stanley (Aruba Networks)

13. Network Provided Location - Response
March, 2006
Network Provided Location - Response
AP ( if capable) calculates/obtains the requested location in the desired format, encoding…etc
AP sends a Presence Response frame to the requesting STA which includes the Location Descriptor and Location Data fields
D. Stanley (Aruba Networks)

14. Network Provided Location Example
March, 2006
Network Provided Location Example AP
STA
Presence Request (Dialog Token, Presence Parameters Element)
Location Descriptor field is included in the Presence Parameters Element
Presence Response (Dialog Token, Mgt Action Pending, Presence Parameters Element)
Location Descriptor and Location Data fields are included in Presence Parameters Element
D. Stanley (Aruba Networks)

15. Interval-Based Network Provided Location
March, 2006
Interval-Based Network Provided Location
STA sends unicast Presence Request with Location Descriptor and Service Parameters
Location Descriptor includes what options the response should have:
Location Subject = Local
Format
Encoding
Resolution
Service Parameters specifies the interval and “start” service
Infrastructure validates request came from allowed client and options match network capabilities.
D. Stanley (Aruba Networks)

16. Interval-Based Network Provided Location - Response
March, 2006
Interval-Based Network Provided Location - Response
Network receiving Presence Request with Location Descriptor with Location Subject = Local and Service Parameters
Network if capable calculates requested location in format, encoding…etc upon interval requested
Network sends Presence Response with Location Descriptor and Location Data at requested intervals
D. Stanley (Aruba Networks)

17. Location Source ID Location Source ID
March, 2006
Location Source ID
Location Source ID
Provides a mechanism whereby a 3rd party/agent can confirm the validity of the location data for STA
Acts as a reference to the source that generated the location Data and provides a means to gather more information on the data element.
D. Stanley (Aruba Networks)

18. Summary: The Location Solution Provides
March, 2006
Summary: The Location Solution Provides
Configuration
Setting up and receiving measurement parameters
Presence
Basic measurement and announcement
Location
The location data calculated from the raw measurements
Location data provided to STA
D. Stanley (Aruba Networks)

19. March, 2006
Motion
Move to include the substantive text in document 06/0009r2 into the TGv draft.
Moved:
Seconded:
D. Stanley (Aruba Networks)

20. March, 2006
References
D. Stanley (Aruba Networks)