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Kommunikatsiooniteenuste arendus IRT0080

Kommunikatsiooniteenuste arendus IRT0080. Loeng 11/2008 Avo Ots telekommunikatsiooni õppetool, TTÜ raadio- ja sidetehnika inst. avo.ots@ttu.ee. Near Field Communication. Wi-Fi A,B,G,N. 60GHz. UWB. Bluetooth. GPS. TV- DVB. WiMAX. 3G. Many Radios ... Limited Spectrum. FM. Use Cases.

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Kommunikatsiooniteenuste arendus IRT0080

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  1. Kommunikatsiooniteenuste arendusIRT0080 Loeng 11/2008 Avo Otstelekommunikatsiooni õppetool, TTÜ raadio- ja sidetehnika inst.avo.ots@ttu.ee

  2. Near Field Communication Wi-Fi A,B,G,N 60GHz UWB Bluetooth GPS TV- DVB WiMAX 3G Many Radios ...Limited Spectrum FM

  3. Use Cases Projector Home theater (AV receiver) Wireless AP (Internet gateway) DTV Camcorder Home PC Digital camera STB (Cable TV access) DVD player PMP • Many applications including … • Delivering multiple HD streams to several receivers • Displaying stored digital contents from media servers to display devices • Browsing contents in distributed devices through big screen TVs 3

  4. Laptop PC Laptop PC Home PC STB (Cable TV access) AP PMP PMP PMP PMP Multicast • Content server multicasts multimedia streams to many authenticated users. • Regardless of how many users receive the streams, a single WLAN channel is expected to be used. • Content server can be STB, PC, AP, or even any portable devices. 4

  5. One TS contains audio, video, data TS Header (4 bytes) has an adaptation field control. This is used among other things to identify the presence of PCR (Program Clock Reference) following the header.

  6. Parameters* Max duration of an error event <= 16 ms; 1 error event per 4 hours Max video/audio delay < 200/50 ms; max jitter < 50 ms 6 * From TR-126 www.dslforum.org

  7. Multi-Radio Concurrent Usages WiMAX Coverage Bluetooth Coverage Bluetooth Coverage Wireless Gateway on the road Wi-Fi Coverage Seamless Handover in home / office

  8. Wi-Fi / WiMAX /Bluetooth Wireless technologies have different sweet spots of operation in terms of coverage, QoS, power, throughput, etc.

  9. Motivation WiMax Wi-Fi GSM 800 CDMA1800 BT UWB WiMax Wi-Fi GSM 800 CDMA 1800 BT UWB GPS Inter-Radio Interference Interferer Victim Isolation Requirements Severe Moderate Cautious No-problem >55db 40-55db 25-40db <25db

  10. Link http://www.compression.ru/video/quality_measure/index_en.html

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