2. KIS – FRI ŽU Network Design for e-learning Martin Klimo Department of InfoCom Networks Faculty of Management Science and Informatics e-mail: martin@frkis.utc.sk

3. KIS – FRI ŽU Student in learning process Knowledge interpretation Lectures Working groups Consulting Knowledge database Knowledge testing

4. KIS – FRI ŽU Student in e-learning process Knowledge interpretation Lectures Working groups Consulting Knowledge database Knowledge testing N e t w o r k

5. KIS – FRI ŽU General network model Radio Televisio n Telefó n Internet X.25 Frame Relay ATM DWDM SDH

6. KIS – FRI ŽU Basic layers local network access network terminal service traffic transportbackbone network transit network customer IN service

7. KIS – FRI ŽU Service evolution telegraphy telephony telegraphy facsimile telex telephony telegraphy radiotelephony data facsimile telex telephony telegraphy ISDN applications home banking green numbers telephone cards additional services voice banking call distribution televoting selective ringing centrex e - mail mobile telephony radiopaging video telephony radiotelephony data facsimile telex telephony telegraphy B-ISDN applications personal number multimedia language translation IP telephony speech recognition personal service profiles teleworking e-business : ISDN applications home banking green numbers telephone cards additional services voice banking call distribution televoting selective ringing centrex e - mail mobile telephony radiopaging video telephony radiotelephony data facsimile telex telephony telegraphy 1870 197019902000

8. KIS – FRI ŽU Basic service categories ITU-T I.210 Recommendation Telecommunication services bearer teleservices +supplementarybasic +supplementary basic

9. KIS – FRI ŽU Telematic services ITU-T I.211 recommendation Teleservices interactive distribution conversational conversational retrieval retrieval messaging messaging without user presentation control without user presentation control with user presentation control with user presentation control

10. KIS – FRI ŽU Services in e-learning Knowledge interpretation Lectures Working groups Consulting distribution conversational messaging retrieval Knowledge database Knowledge testing

11. KIS – FRI ŽU Distributive networks NetworkInformation terrestrial radiospeech, audio terrestrial TV speech, audio, video, text satellite R/TVspeech, audio, video, text, data cable TVspeech, audio, video, text, data

12. KIS – FRI ŽU Conversational networks NetworkInformation telephone networkspeech, picture (fax), low-speed data data networkdata, text, picture, nrt audio/video cable TVspeech, data ISDNspeech, audio, picture, video, text, data

13. KIS – FRI ŽU Service attributes Attributes: general general access access transfer transfer local network access network terminal service traffic transportbackbone net transit network customer IN service

14. KIS – FRI ŽU Customer Network provider Service provider attribute customerbearer Service attributes

15. KIS – FRI ŽU Customer attributes general (service layer) information tranfer (text, data, speech, audio, information tranfer (text, data, speech, audio, picture, video) supplementary services provided supplementary services provided quality of service quality of service interservice capabilities interservice capabilities flexibility flexibility operational and commercial aspects operational and commercial aspects

16. KIS – FRI ŽU Customer attributes access (traffic layer) establishment of communication (on demand, permanent, reserved) establishment of communication (on demand, permanent, reserved) calling party autentification and access control calling party autentification and access control communication configuration (point-to-point, multipoint, broadcast) communication configuration (point-to-point, multipoint, broadcast) access delay access delay access reliability access reliability mobility (forwarding, full mobility, personal number) mobility (forwarding, full mobility, personal number)

17. KIS – FRI ŽU Customer attributes information transfer (transport layer) transfer security transfer security transfer integrity transfer integrity symmetry (unidirectional, bidirectional symmetric, bidirectional asymmetric) symmetry (unidirectional, bidirectional symmetric, bidirectional asymmetric)

18. KIS – FRI ŽU Customer Network provider Service provider attribute customerbearer Service attributes ???

19. KIS – FRI ŽU Horizontal segmentation local service traffic tranport global customer wide area access edge backbone

20. KIS – FRI ŽU Access networks - wired System Rate [Mbit/s] Technology Range [km] PSTN0,056QPSK10 N-ISDN 0,144 - 2 TDM8 B-ISDN 25 / 51 / 155 / 622 ATM 0,1 / 0,1 /40 / 40 ADSL Down 6 Down 6 Up 0,64 Up 0,64DMT6 Cablemodem Down 40 Down 40 Up 10 Up 10FDDQAM/QPSK20 IEEE 802.11 20 OFDM, TDD 0,3 Ethernet 10 / 100 / 1000 CSMA/CD 2,5 / 0,6 / 0,2 Figures above give approximate upper level

21. KIS – FRI ŽU Access networks - wireless System Rate [Mbit/s] Technology Range [km] GSM, GPRS, HSCSD, EDGE 0,0096 - 0,384 TDMA, FDD 35 (less for GSM data) IMT-2000, UMTS (UTRA) 2 WCDMA, TD- CDMA 20 DECT2TDMA/TDD0,05 Bluetooth0,721 Direct sequence, Frequency hoping 0,01 DAB DAB (audio) Down 1,5 OFDM100 DVB-T DVB-T (video) Down 8 OFDM100 Figures above give approximate upper level