Presence and Integrated

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Presence and Integrated
Communications (PIC) Working Group

• Xiaotao Wu
• Henning Schulzrinne (hgs_at_cs.columbia.edu)
• (with slides from Ben Teitelbaum, Internet2)
• VON Spring 2004 (Santa Clara, CA)
• March 31, 2004

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Goal

• Communication is enhanced through the inclusion
  of rich presence information, through which
  participants may see not only who is on-line, but
  also where they are and what they are doing, so
  that communications becomes planned and desired
  instead of disruptive and haphazard.

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Internet2 Presence and Integrated Communications
WG (PIC)

• Home Page
• http//pic.internet2.edu/
• Chair
• Jeremy George, Yale Universityemail, im,
  sipjeremy.george_at_yale.edutel203-436-4507
• Charter
• Foster the deployment of SIP-based communication
  that integrate multiple communications elements
  in the context of presence

Presence and Integrated Communications email,
im, sipjeremy.george_at_yale.edu tel[phone]
email, im, sipben_at_internet2.edu telltif you
likegt pic.internet2.edu
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Presence

• Presence
• Notification of events that facilitate
  communication
• On-line, Away, Idle, On phone, Out to
  lunch, ...
• Back to the future?
• Remember BSD finger, write, who, talk?
• Zephyr at MIT (1980s)
• Presence restores the sense of community that
  existed on timesharing systems
• Forward to the future!
• New standards for interoperability and
  scalability
• User-centric control of presence publication
• Richer state semantics and automatic triggers

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Presence and the Enterprise

• Users on campus are defecting
• Cell phones (for mobility)
• AIM, Yahoo!, Skype (for IM and presence)
• Enterprises
• Control the physical and networking environment
  of their users
• Uniquely situated to provide presence services
• Control vital presence sensors calendar, room
  occupancy sensors, physical access control

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Rich Presence Trials

• Prototypes of next-gen campus services
• Trials conducted at Internet2 conferences
• Based on SIP/SIMPLE
• Highly-participatory
• New network infrastructure (WiFi location
  tracking)
• New middleware (presence agent / location server)
• New clients
• Participants
• Columbia IRT Lab, HP Labs Cambridge, University
  of Pennsylvania, Ford Motor Company, Microsoft,
  ...

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Rich Presence Trials
Indianapolis October, 2003 Honolulu January,
2004 Arlington April, 2004
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Determining location

• Two types of sensors
• end system determines location
• handset-based ? GPS, 802.11 triangulation
• network conveys location to end system or other
  component
• MAC backtracking
• AP-based 802.11 triangulation
• swipe cards, iButtons, active badges
• Two modes
• explicit user action swipe card, touch iButton
• involuntary network-based tracking
• GPS may not be practical (cost, power, topology)
• Add location beacons
• extrapolate based on distance moved
• odometer, pedometer, time-since-sighting
• idea meet other mobile location beacons
• estimate location based on third-party
  information

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WiFi Location Tracking

• HP Labs Metro Project
• Signal Strength Location Tracking
• Room-level accuracy
• Sniff client signal strength from multiple
  monitors
• Triangulation difficult due to walls, multipath
  effects
• Match signal strength signature of target
  locations
• Calibrate system by gathering signatures for each
  location
• No client software required
• But clients do have to transmit to be located

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Skiffs

• Standard access points
• No client software
• Skiff monitors
• SA110 single board computer running Linux
• Report signal strength, MAC address of all
  packets seen

InferenceEngine
Scanner
Aggregator
Consolidator
WirelessClient
Web Server
Scanner
SIP LocationService
Scanner
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MAC Address Locations
ARPWatch and SIP registry to map MAC addresses to
SIP URIs
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A simple example
Talk to Xiaotao

• Over the phone
• Go to his place and
• talk face to face
• IM and meet him
• in conference room

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Activities

• Arlington, April 2004
• Venue Spring 2004 Internet2 Member Meeting,
  Arlington, VAPresence Elements (anticipated)
  location (automatic) room session name session
  end time per-room internet weather
• Honolulu, January 2004
• Venue Winter 2004 Joint Techs Workshop,
  University of HawaiiPresence Elements location
  (automatic) room session name session end time
  per-room internet weatherClients sipc (Windows,
  Linux) presence portal
• Indianapolis, October 2003
• Venue Fall 2003 Internet2 Member Meeting,
  Indianapolis, INPresence Elements location
  (manual) room session name session end time
  Clients sipc (Windows, Linux) Session (Mac,
  Windows) presence portal

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Technical details
SUBSCRIBE to my location
NOTIFY myself and others locations
PUBLISH presence status
by Jamey from HP
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802.11 Signal Strength Location Tracking

• Room-level accuracy
• Unassociated 802.11 monitoring of all channels in
  use
• Gathers signal strength measurements of each
  client
• Clients visible from multiple monitors
• Triangulation difficult due to walls, multipath
  effects
• Match signal strength signature of target
  locations
• Calibrate system by gathering signatures for each
  location
• No client software required
• But clients do have to transmit to be located

by Jamey from HP
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802.11 Location Tracking

• Standard access points
• No client software
• Skiff monitors
• SA110 single board computer running Linux
• Report signal strength, MAC address of all
  packets seen

by Jamey from HP
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Locating client devices

• ARP to correlate MAC to IP

by Jamey from HP
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Locating SIP clients

• Correlate client IP addr to SIP registrar

by Jamey from HP
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IETF efforts

• GEOPRIV working group
• DHCP Option for Civil Addresses
• A Presence-based GEOPRIV Location Object Format
• SIMPLE working group
• RPID - Rich Presence Information Data Format
• CIPID Contact Information in Presence
  Information Data Format
• SIPPING working group
• Requirements for Session Initiation Protocol
  Location Conveyance

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sipc for PIC trial

• PUBLISH and XCAP support
• Location-switch extension for CPL
• Display location information
• Pinpoint a user on a map
• Convey civil/geo location map address
• Map URL can be in location notifications (in
  CIPID or pidf-lo document)

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Pinpoint a user on a map
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Actions to a location
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location-switch for CPL
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location-switch for CPL

• lt?xml version"1.0"?gt
• ltcplgt
• ltincominggt
• ltlocation-switch type"civil"gt
• ltlocation loc""gt
• lttime-switchgt
• lttime dtstart"20040224T200055Z"
  dtend"20040224T210055Z"gt
• ltreject status"486" reason"Busy"/gt
• lt/timegt
• lt/time-switchgt
• lt/locationgt
• lt/location-switchgt
• lt/incominggt
• lt/cplgt

http//www.ietf.org/internet-drafts/draft-wu-iptel
-locswitch-00.txt
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More location handling
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sipc works as a LG
PUBLISH
TCP socket on port 5622
location daemon