Network Design for e-learning

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

Studentin learning process Knowledge interpretation Consulting Working groups Lectures Knowledge testing Knowledge database KIS – FRI ŽU

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

General network model SDH X.25 Frame Relay Telefón ATM Television Radio DWDM Internet KIS – FRI ŽU

customer terminal INservice service transit network local network traffic access network transport backbone network Basic layers KIS – FRI ŽU

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 selectiveringing centrex e - mail mobile telephony radiopaging video telephony radiotelephony data facsimile telex telephony telegraphy Service evolution ISDN applications home banking green numbers telephone cards additional services voice banking call distribution televoting selectiveringing centrex e - mail mobile telephony radiopaging video telephony radiotelephony data facsimile telex telephony telegraphy radiotelephony data facsimile telex telephony telegraphy facsimile telex telephony telegraphy telephony telegraphy telegraphy 1970 1990 2000 1870 KIS – FRI ŽU

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

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

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

Distributive networks Network Information terrestrial radio speech, audio terrestrial TV speech, audio, video, text satellite R/TV speech, audio, video, text, data cable TV speech, audio, video, text, data KIS – FRI ŽU

Conversational networks Network Information telephone network speech, picture (fax), low-speed data data network data, text, picture, nrt audio/video cable TV speech, data ISDN speech, audio, picture, video, text, data KIS – FRI ŽU

customer terminal INservice service transit network local network traffic access network transport backbone net Service attributes Attributes: • general • access • transfer KIS – FRI ŽU

attribute customer bearer Service provider Network provider Customer Service attributes KIS – FRI ŽU

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

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

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

Service provider Network provider Customer Service attributes attribute customer bearer ??? KIS – FRI ŽU

Horizontalsegmentation access edge backbone wide area local global customer service traffic tranport KIS – FRI ŽU

Access networks - wired Figures above give approximate upper level KIS – FRI ŽU

Access networks - wireless Figures above give approximate upper level KIS – FRI ŽU

Network Design for e-learning