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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.

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Presentation on theme: "1 Mobile WiMAX Transmission and Handover with Video Streaming – Real-Time Software Implementation on DSP and PC Joint work of the following labs: Prof."— Presentation transcript:

1 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 2 Logical System Structure

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

4 4 MAC Architecture (Implemented on Linux PC)

5 5 H.264 Decoding on PACDSP Platform

6 6 Fast SIP Handoff (Implemented on Linux PC)

7 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 8 Video Decoding Speed H.264/AVC Decoder : 採用 Baseline Profile 傳送 H.264/AVC 測試影片資訊 ( “ ” 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 9 Overall Handoff Speed Under Small and Large Internet Delays Small Internet Delay Large Internet Delay

10 10 PHY Computational Complexity ModuleEquiv. # of C6416Ts at 1 GHz Tx_PHY ( U-PHY, FEC, Framing & IFFT ) 0.82 Tx_Filter0.25 Channel Simulator (AWGN) (SUIs) (ETSI_A) Rx_Filter0.54 Sync (include FFT) + Chan. Est.0.23 Rx_PHY ( U-PHY, DeFEC & DeFraming ) 1.16 註 : 以上為 downlink, 1024-FFT, 使用 6 subchannels, major group = 0 之情形下


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