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Joint work of the following labs:

Mobile WiMAX Transmission and Handover with Video Streaming – Real-Time Software Implementation on DSP and PC. Joint work of the following labs: Prof. David W. Lin – CESP Lab, Prof. ChingYao Huang – WINTech Lab

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Joint work of the following labs:

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  1. Mobile WiMAX Transmission and Handover with Video Streaming– Real-Time Software Implementation on DSP and PC Joint work of the following labs: Prof. David W. Lin – CESP Lab, Prof. ChingYao Huang – WINTech Lab Dept. Electronics Engineering, National Chiao Tung University, Hsinchu, Taiwan, R.O.C. Prof. Jenq-Kuen Lee – Programming Language Lab, Prof. Wei-Kuan Shih – Real Time Lab, and Prof. Jyh-Cheng Chen – WIRE Lab Dept. Computer Science, National Tsing Hua University, Hsinchu, Taiwan, R.O.C. 2006/12 This research was supported by grants from the National Science Council of R.O.C. and the Institute for Information Technology, Taipei, Taiwan, under a project sponsored by MOEA, R.O.C.

  2. Logical System Structure

  3. PHY Architecture Uplink Rx Filter Sync. + Chan. Est. DeFEC + DeFraming FEC + Framing Tx Filter Channel Simulator (AWGN, SUI 1-6, ETSI_A) 1 DSP 2 DSPs Tx Rx Rx Filter DeFEC + DeFraming Sync. + Chan. Est. 1 DSP Tx Filter FEC + Framing Downlink 2 DSPs 1 DSP Rx Tx (DSPs are TI TMS320C6416Ts housed on Sundance DSP boards)

  4. MAC Architecture (Implemented on Linux PC)

  5. H.264 Decoding on PACDSP Platform

  6. Fast SIP Handoff (Implemented on Linux PC)

  7. Video Streaming System Parameters • Video RTP Server • RTP Version: 2.0 (RFC 3550) • 傳送的 frame rate 可以由使用者在命令列的參數作調整, 大約每秒送15張 • H.264 Video Bitstream 之 NAL unit 與 RTP 關係 • One NAL unit in one RTP packet • One slice in one NAL unit • One frame 只有一個slice • 基本上每個 RTP Packet 傳送一個 frame

  8. Video Decoding Speed • H.264/AVC Decoder : 採用 Baseline Profile • 傳送 H.264/AVC 測試影片資訊(“2.264”這個檔案) • File Size: 1,072,094 bytes • Resolution: QCIF (176x144) • 總Frame數: 450 張 (I frame) • Frame Rate: 15 frames per second • 實際在 Versatile 上接收 streaming 並且解碼(ARM+PACDSP)、顯示的效能 • 共需花43秒 • 實際播放速率：450/43 = 10.5 frames/sec • 每秒消耗: 1,072,094/43 = 25 K bytes/sec

  9. Overall Handoff Speed Under Small and Large Internet Delays Small Internet Delay Large Internet Delay

  10. PHY Computational Complexity 註 : 以上為 downlink, 1024-FFT, 使用 6 subchannels, major group = 0 之情形下

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