Скачать презентацию Sidevõrgud IRT 4060 IRT 0020 vooruloeng 4 Скачать презентацию Sidevõrgud IRT 4060 IRT 0020 vooruloeng 4

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Sidevõrgud IRT 4060/ IRT 0020 vooruloeng 4 / 6. okt 2004 Avo Ots telekommunikatsiooni Sidevõrgud IRT 4060/ IRT 0020 vooruloeng 4 / 6. okt 2004 Avo Ots telekommunikatsiooni õppetool, TTÜ raadio- ja sidetehnika inst. avo. [email protected] ee 30

Koduvõrgu ühendus koduvõrk Access Network NT 31 Koduvõrgu ühendus koduvõrk Access Network NT 31

Authentication WLAN access network Authentication management Local Authentication RADIUS PROXY CSP RADIUS Environment Park Authentication WLAN access network Authentication management Local Authentication RADIUS PROXY CSP RADIUS Environment Park RADIUS SMEs LABs 32

Võrkudevaheline ühendus circuit switched IP routed USB Internet Gateway IP Network ISDN Soft phone Võrkudevaheline ühendus circuit switched IP routed USB Internet Gateway IP Network ISDN Soft phone IP Line Card Rakendusserverid PRI BRI Voice + Data over the LAN 33

Juurdepääsu viisid võrku Terminaal Raadioühendus Võrk Teenused 60 GHz ATM speech 17 GHz Internet Juurdepääsu viisid võrku Terminaal Raadioühendus Võrk Teenused 60 GHz ATM speech 17 GHz Internet video 5 GHz Intranet Qo. S data ……. . best-effort data 40 GHz Phone PDA laptop WLAN WLL Satellite

Virtuaalsed teed ja kanalid (VPI, VCI) VPI-10, 50 Mb/s STM 1 155 Mb/s VCI-100 Virtuaalsed teed ja kanalid (VPI, VCI) VPI-10, 50 Mb/s STM 1 155 Mb/s VCI-100 VCI-101 VPI-20, 60 Mb/s 35

WCDMA kanalid Channels broadcast to all UE in the cell P-CCPCH- Primary Common Control WCDMA kanalid Channels broadcast to all UE in the cell P-CCPCH- Primary Common Control Physical Channel SCH - Sync Channel P-CPICH - Primary Common Pilot Channel S-CPICH - Secondary Common Pilot Channel(s) Paging Channels S-CCPCH - Secondary Common Control Physical Channel PICH - Page Indication Channel Random Access and Packet Access Channels Base Station PRACH - Physical Random Access Channel (BS) PCPCH - Common Physical Packet Channel AICH - Acquisition Indication Channel AP-AICH - Acquisition Preamble Indication Channel User Equipment (UE) CD/CA-AICH - Collision Detection Indication Channel CSICH - CPCH Status Indication Channel Dedicated Connection Channels DPDCH - Dedicated Physical Data Channel DPCCH - Dedicated Physical Control Channel F-PDSCH - Physical Downlink Shared Channel 36

UTRAN OSI Model Layer 3 Radio Resource Control (RRC) Logical channels Layer 2 Medium UTRAN OSI Model Layer 3 Radio Resource Control (RRC) Logical channels Layer 2 Medium Access Control (MAC) - grouped by information content - User Data - Control and signaling Transport channels Layer 1 Physical layer - grouped by method of transport Physical channels Direct RRC control of the physical layer Air Interface Physical Channels Distinguished by: - RF Frequency - Channelization Code - Spreading Code - Modulation (I/Q) Phase (uplink) - Timeslot (TDD mode) 37

Vastastikused häired 38 Vastastikused häired 38

Side loomine (connection establishment) Nõudlus A B Vastus (kinnitus) 39 Side loomine (connection establishment) Nõudlus A B Vastus (kinnitus) 39

Kvaliteet 40 Kvaliteet 40

Network structure (TUT) - public access networks (PAN) isolated from other networks in the Network structure (TUT) - public access networks (PAN) isolated from other networks in the edge routers access controller Internet - access from PAN to Internet controlled by access controllers - department ”intranets” may be protected with access control lists / filters in the edge routers Main house ”intra” networks TUT core network - VLANs are used to separate access controllers to own access controller segment - public access network is considered a hostile network like the Internet Main house public access network Tietotalo ”intra” networks Tietotalo public access network 41

Network elements (TUT) TUT core network Internet department x ”intranet” department y ”intranet” VPN Network elements (TUT) TUT core network Internet department x ”intranet” department y ”intranet” VPN terminator IPSEC/VPN secured access to department ”intranet” Access Controllers combined department employee/public access zone e. g. teamwork room public access zone e. g lecture hall Nonencrypted filtered access to Internet 42

Hierarhia + 49 89 1234567 43 Hierarhia + 49 89 1234567 43