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

Klaas.Wierenga@SURFnet.nl

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

• Mobility@terena.nl