1. Virtual and Persistent Presence from a mobility perspective Klaas Wierenga Klaas.Wierenga@SURFnet.nl TNC Antalya, May 2001

2. ContentsContents Ubiquitous access Why Presence? Examples Definition Issues Standardisation efforts Conclusions Links

3. PresencePresence 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 2aCOMPANY 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

4. VirtualVirtual 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 2 : of, relating to, or using virtual memory 3 : of, relating to, or being a hypothetical particle whose existence is inferred from indirect evidence compare REAL 3REAL

5. PersistentPersistent 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 b : continuing without change in function or structure c : effective in the open for an appreciable time usually through slow volatilizing d : degraded only slowly by the environment e : remaining infective for a relatively long time in a vector after an initial period of incubation 2 a : continuing or inclined to persist in a course b : continuing to exist in spite of interference or treatment - per·sis·tent·ly adverb

6. Wireless Wired nomadic fixed WLAN xDSL cable ethernet GSM GPRS UMTS dialup Ubiquitous access Always on Hi/low bw Roaming Location

7. The hourglass applications middleware transmission IP End2end IPv6 Mobile-IP

8. 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

9. Instant messaging - ICQ

10. Web-centric - Gooey

11. 3D - Active Worlds

12. Agents – Gossip

13. Location Based Services – LocatioNet

14. Personalisation - CDnow

15. PresencePresence 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

16. The intelligent mobile world users Devices Systems & applications Physical environment 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

17. IssuesIssues Privacy and security (AAA) Accounting Privacy Naming & Addressing Locators, directories Connectivity Management / Negotiation QoS, Bandwidth Infrastructure management

18. 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!)Excite@home Wireless Village IMPS (Ericsson, Motorola, Nokia) …

19. ConclusionsConclusions 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

20. 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 Mobility@terena.nl