Sidevõrgud IRT 4060/ IRT 0020 loengud kolmapäeviti kell 10 Avo Ots telekommunikatsiooni õppetool, TTÜ raadio- ja sidetehnika inst. avo.ots@ttu.ee
Võrgutehnoloogiad TEENUSED Võrgutehnoloogia: kanalitehnoloogia võrgusõlme tehnoloogia TEENUSED RIISTVARA & TARKVARA
Teenused võrgu kaudu
Lüüs/marsruuter G R
Kihid 7 6 5 4 3 2 1 Füüsiline (ühendus) Kanal Võrk Transport Seanss Esitlus Rakendus Application Presentation Session Network Data link Physical SSL, WSP RFC 791 IP, RFC 792 ICMP TCP RFC 793, UDP RFC 768 WAE, HTTP, RFC821,822 ISO 8859-15 IEEE 802.11a Cat5, RS-232D
UNI UNI Application Layer CPE CPE NNI NNI Service Layer Transmission Network CPE CPE NNI NNI Service Layer Switching Network Switching Network Switching Network Transmission Layer Transmission Network Transmission Network NNI NNI Physical Layer Physical Network Physical Network NNI Physical Network Physical Interface Logical Interface Service Access Point
Service Components Service Control Service Switching Service Access Independent Block Service Independent Block Service Independent Block Service Independent Block Service Independent Block Service Logic Service Logic Service Control Service Switching Service Switch Service Switch Service Switch Service Switch Service Access Service Access Service Access Service Access Service Access Service Access Session Control (Circuit Switching control) Call/ Session Call/ Session Call/ Session Call/ Session Call/ Session Call/ Session Call/ Session
Client Server Application Layer Server Server Server CPE IP CPE IP ISP Applications ISP Applications ISP Applications CPE IP CPE IP Network Layer Packet Switching Network Packet Switching Network IP NNI Transmission Layer Transmission Network Transmission Network NNI Transmission Network Physical Interface Logical Interface Service Access Point
Telecom basic service/call control Off-line customer management Transmission Access Service Terminal Telecom basic service/call control Off-line customer management Extended call control and IN charging Linear Service Architecture in Legacy Network: Static Services A Terminal B Portal Transmission Access Session Service Control Service A Home Service B Home Service A User Service Management B User Service Two-Dimension Service Architecture in NGN: Active Services
Standardimine EuroDOCSIS DOCSIS - Data Over Cable Service Interface Specification Euro – Standardi kohandus Euroopa kaabellevi oludesse Kanaliplaan
Downstream Keskseade HFC Kaabelmodemid Pidev andmevoog kõigi kaabelmodemiteni Modulatsioon: 64QAM, 256QAM Sageduspiirkond: 85 – 860 MHz Kanalilaius: 8 MHz Edastuskiirus: 27 – 56 Mbit/s Jõudlus: 1000 – 1200 klienti
Upstream Kaabelmodem HFC Keskseade TDMA (Time Division Multiple Access) Modulatsioon: QPSK, 16QAM Sageduspiirkond: 5 – 65 MHz Kanalilaius: 2 MHz Edastuskiirus: ~ 3 Mbit/s Jõudlus: 200 klienti
Andmevoogude sidumine