1 Kommunikatsiooniteenuste arendus IRT0080 Loeng 3 Avo Ots telekommunikatsiooni õppetool, TTÜ raadio- ja sidetehnika inst.

2 Capacity Units Gflops Gbytes Tflops Pbytes Pflops Ebytes 10e06 10e09 10e15 10e12 Mbps Backbone Gbps Backbone Tbps Backbone 10% BsBW e2e Tbps throughput e2e Gbps throughput e2e kbps t hroughput 10%BsBW Terascale Computing Gigascale Computing Petascale Computing Arvuti- ja kommunikatsioonijõudlus

3 Võrgukihi kommutaator

PBX Transformation PBX Telephony Server

Efficiency & quality Packetsize Codec Efficiency of transport Voice quality DejitteringdelayEchocontrolHeadercompression

6 Kõne pakettvõrgus Kõnesignaali komprimeeriv koodek (ITU-T G.729A, 8 kbit/s) VAD ( Voice Activity Detection ), Silence Suppression, Comfort Noise Generation Töödeldava lugemikogumi pikkus : 20 ms, => Payload 20 octets Ethernet+FCS+Preamble:26 bytes 802.1q VLAN Tagging 4 bytes IP: 20 bytes UDP: 8 bytes RTP:12 bytes Voice Payload:20 bytes bytes

7 Paketiülekande hinnangud

8 DNS-B ( e164.arpa) DNS-A ( e164.arpa) ENUM proxy.com INVITE Answer = “(919) " Query e164.arpa Authority = DNS-B Query e164.arpa

9 ApplicationData lossBandwidthTime sensitive Application layer protocol Transport protocol File transferNoElasticNoFTPTCP NoElasticNoSMTPTCP Web documents NoElastic, KbpsNoHTTPTCP Real-time audio/video YesKbps, MbpsYes, 100s of Msec ProprietaryTCP or UDP Stored audio/video YesKbps, MbpsYes, secProprietary, NFS TCP or UDP Interactive games YesKbpsYes, 100s of Msec ProprietaryTCP or UDP Financial applications NoElasticBothProprietaryTCP TCP: guarantee: deliver all data; no guarantee: rate, delay; connection; congestion control UDP: no guarantee: deliver all data, order, delay; no connection; no congestion control

10 Areng cdmaOne GSM TDMA PDC 2G kbps MC1X GPRS evolved 2G 64–144 kbps WLAN Bluetooth evolved 3G 384 kbps - 20 Mbps Always Best Connected EDGE WCDMA cdma2000 3G 384 kbps - 2 Mbps 4G 100 Mbps? 60 GHz Ad hoc networks Optical Networking New air- interface? Virtual Reality Always Best Connected

11 Mobiilsus High-end Datacom users Mobility Processing capacity User interface, e.g. screen-size

12 Connectivity In the car In the office Stationary  Wi-Fi Portable  Wi-Fi & WiMAX On campus Portable  Wi-Fi & WiMAX & Cellular TODAY In the cityHome or school Seamless roaming among wireless networks Portable  Wi-Fi & WiMAX

13 Network paradigm shift CurrentFuture In a converged network, services will no longer be tied to a one type of network. Instead, the converged network will deliver all services.

14 Mobiilsus base station home agent Internet w/ Mobile IP mobile mobile access network