Peter Parnes, PhD Lule

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Peter Parnes, PhDLuleå University of
TechnologyMedia Technology
medie
teknik
Human Communication
April 8 2005, Luleå
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Always Best Communication - ABC

• Users want to communicate with each other
• Any place
• Any time
• Any device
• How can we utilize wireless networks in
  supporting ABC?

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Simple Scenario

• Session AND device mobility
• A user is late for an online meeting
• The system knows this from the users calendar
• The system automatically dials the users mobile
  phone
• Audio participation
• The user reaches her office
• This is noted by position awareness
• The system automatically joins the online meeting
  and ask the user where she want the audio
• In the mobile, PC audio or desktop phone?
• User selects desktop phone on the PC screen and
  the call is transferred from the mobile.

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Problems

• How to detect locality with good enough
  precision?
• How to swap between different wireless and fixed
  carriers?
• Carrier mobility
• How to swap between devices
• Session mobility
• How to keep the current session running?

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Ubiquitous Human Communication
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Ubiquitous Human Communication

• Imagine rich media sensors
• Includes audio in (microphone) and audio out
  (speaker)
• but not necessarily in the same device
• Includes video in (camera) and video out
  (display)
• but not necessarily in the same device
• Not all in same device (might be 4 different)
• Cheap
• Doesnt have to run on batteries
• WLAN

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Available everywhere

• We put these all over a work place
• Offices
• Corridors
• Homes
• Use together with good enough positioning of all
  users
• Allow for free communication anywhere
• Ubiquitous Human Communication

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Problems

• How to make the sensors cheap
• Distributed echo canceling/suppression and
  multi-channel audio playback
• Multi-view video grabbing presented
• Several video views to multiple video display
  devices on the other side.
• WLAN model when using high quality video feeds
  (sustained 1-25Mbps per video channel and several
  channels).
• Power?
• Perhaps skip WLAN and go for ethernet power
  over ethernet instead?

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Comments?
medie
teknik
Peter Parnes, PhD Peter.Parnes_at_ltu.se 070 6614567
http//media.csee.ltu.se/