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Virtual and Persistent Presence from a mobility perspective Klaas Wierenga [email protected]...
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Transcript of Virtual and Persistent Presence from a mobility perspective Klaas Wierenga [email protected]...
Virtual and Persistent Presence from a mobility Virtual and Persistent Presence from a mobility perspectiveperspective
Virtual and Persistent Presence from a mobility Virtual and Persistent Presence from a mobility perspectiveperspective
Klaas Wierenga
TNC Antalya, May 2001
ContentsContentsContentsContents
• Ubiquitous access
• Why Presence?
• Examples
• Definition
• Issues
• Standardisation efforts
• Conclusions
• Links
PresencePresencePresencePresence
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
VirtualVirtualVirtualVirtual
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
PersistentPersistentPersistentPersistent
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
Wireless
Wired
nomadicfixed
WLAN
xDSLcable
ethernet
GSMGPRSUMTS
dialup
Ubiquitous accessUbiquitous accessUbiquitous accessUbiquitous access
•Always on
•Hi/low bw
•Roaming
•Location
The hourglassThe hourglassThe hourglassThe hourglass
applications
middleware
transmission
IP
•End2end
•IPv6
•Mobile-IP
Electronic and persistent presenceElectronic and persistent presenceElectronic and persistent presenceElectronic 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 - ICQInstant messaging - ICQInstant messaging - ICQInstant messaging - ICQ
Web-centric - GooeyWeb-centric - GooeyWeb-centric - GooeyWeb-centric - Gooey
3D - Active Worlds3D - Active Worlds3D - Active Worlds3D - Active Worlds
Agents – GossipAgents – GossipAgents – GossipAgents – Gossip
Location Based Services – LocatioNetLocation Based Services – LocatioNetLocation Based Services – LocatioNetLocation Based Services – LocatioNet
Personalisation - CDnowPersonalisation - CDnowPersonalisation - CDnowPersonalisation - CDnow
PresencePresencePresencePresence
• Information about– The environment you are in (real or virtual)– What you are doing– Who you are– Your preferences
– ‘you are there’: presence of user somewhere else– ‘it is here’: presence of remote objects/users near the user– ‘we are together’
– Continuous (3d party) information about your current presence
The intelligent mobile worldThe intelligent mobile worldThe intelligent mobile worldThe intelligent mobile world
usersDevices
Systems & applications
Physicalenvironment
I am Nikita and I like
holidays
I am a pda and have color
capabilities
I am the app. Server of
x.com and offer service A and B
I am a combination of information defining the
environment around a user
3G network
I can deliver 500 Kbit
connection
IssuesIssuesIssuesIssues
• Privacy and security (AAA)• Accounting• Privacy• Privacy• Privacy• Naming & Addressing• Locators, directories• Connectivity Management / Negotiation• QoS, Bandwidth• Infrastructure management
Standardisation effortsStandardisation effortsStandardisation effortsStandardisation 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)• …
ConclusionsConclusionsConclusionsConclusions
• Presence is not new but increasingly important to deal with ubiquitous access
• Presence as a generic, standardized middleware layer is desirable to build new kinds of services upon like:
– IM
– LBS
– Personalisation
• Privacy remains a very important issue
Useful linksUseful linksUseful linksUseful links
• www.ietf.org/html.charters/wg-dir.html
• www.w3c.org/Mobile/CCPP
• www.mexeforum.org
• www.imunified.org
• www.wireless-village.org