Transcript Virtual and Persistent Presence from a mobility perspective

Virtual and Persistent Presence from a mobility
perspective
Klaas Wierenga
[email protected]
TNC Antalya, May 2001
Index
• Ubiquitous access
• Why Presence?
• Examples
• Definition
• Issues
• Standardisation efforts
• Conclusions
• Links
Presence
Function: noun
Date: 14th century
1 : the fact or condition of being present
2 a : the part of space within one's immediate vicinity b : the
neighborhood of one of superior especially royal rank
3 archaic : COMPANY 2a
4 : one that is present: as a : the actual person or thing that is
present b : something present of a visible or concrete nature
5 a : the bearing, carriage, or air of a person; especially : stately
or distinguished bearing b : a quality of poise and effectiveness
that enables a performer to achieve a close relationship with an
Audience
6 : something (as a spirit) felt or believed to be present
Virtual
Function: adjective
Etymology: Middle English, possessed of certain
physical virtues, from Medieval Latin virtualis, from
Latin virtus strength, virtue
Date: 1654
1 : being such in essence or effect though not
formally recognized or admitted <a virtual dictator>
2 : of, relating to, or using virtual memory
3 : of, relating to, or being a hypothetical particle whose
existence is inferred from indirect evidence <virtual
photons>
compare REAL 3
Persistent
Function: adjective
Etymology: Latin persistent-, persistens, present participle of persistere
Date: 1826
1 : existing for a long or longer than usual time or continuously: as a :
retained beyond the usual period <a persistent leaf> b : continuing
without change in function or structure <persistent gills> c : effective in
the open for an appreciable time usually through slow volatilizing
<mustard gas is persistent> d : degraded only slowly by the
environment <persistent pesticides> e : remaining infective for a
relatively long time in a vector after an initial period of incubation
<persistent viruses>
2 a : continuing or inclined to persist in a course b : continuing to exist
in spite of interference or treatment <a persistent cough>
- per·sis·tent·ly adverb
Ubiquitous access
Wireless
WLAN
GSM
GPRS
UMTS
•Always on
•Hi/low bw
•Integration
Wired
xDSL
cable
ethernet
fixed
•Roaming
dialup
nomadic
•Location
The hourglass
•End2end
applications
middleware
•IPv6
IP
transmission
•Mobile-IP
Electronic and persistent presence
• With Mobile-IPv6 we can communicate whenever,
wherever but how?
• Where (virtual and real), availability, bandwidth,
device capacities, user capabilities, user
preferences etc. etc.?
• Human + technical constraints =>
Presence Information as middleware
Instant messaging - ICQ
Web-centric - Gooey
3D - Active Worlds
Agents – Gossip
Location Based Services – LocatioNet
Personalisation - CDnow
Presence
• Information about
– The environment you are in (real or virtual)
– What you are doing
– Who you are
• Virtual presence
– ‘you are there’: presence of user somewhere else
– ‘it is here’: presence of remote objects/users near the user
– ‘we are together’
• Persistent presence
– (3d party) information about your current presence
The intelligent mobile world
I am Nikita and
I like
holidays
users
I am a pda
and have color
capabilities
Devices
I can deliver
500 Kbit
connection
3G network
I am the
app. Server of
x.com and offer
service A and B
Systems &
applications
I am a combination of
information defining the
environment around
a user
Physical
environment
Issues
•
•
•
•
•
•
•
•
•
•
Privacy and security (AAA)
Privacy
Privacy
Privacy
Naming & Addressing
Accounting
Connectivity Management / Negotiation
QoS, Bandwidth
Locators, directories
Infrastructure management
Standardisation efforts
• IETF
– IMPP working group
– rescap
– Beep
– AAA
–…
• W3C
– CC/PP
– PPP
• ETSI
– MExE
• IMUnified (AT&T, Excite@home, MSN, Odigo, Phone.com,
Prodigy, Yahoo!)
• Wireless Village IMPS (Ericsson, Motorola, Nokia)
• …
Conclusions
• Presence is important to deal with ubiquitous
access
• Presence as a middleware layer is needed to build
new kinds of services upon like
– IM
– LBS
– Personalisation
• Privacy is a very important issue
Useful links
• www.ietf.org/html.charters/wg-dir.html
• www.w3c.org/Mobile/CCPP
• www.mexeforum.org
• www.imunified.org
• www.wireless-village.org
• [email protected]