- 學位論文
固定長度IP資料封包的DVB-H鏈結層接收端之效能
DVB-H Link Layer Receiver with Fixed Length IP Datagrams
摘要
本論文主要目標是要改善手持式數位電視廣播(Digital Video Broadcasting-Handheld；DVB-H)資料鏈結層接收器的效能。DVB-H規格中並沒有明確指定資料鏈結層解碼方式，我們提出在固定長度IP資料封包錯誤及抹失傳輸串流解封裝(IP Datagrames Fixed Transport Stream Erasure Decapsulation；IP–Fixed-TSED)和固定長度IP資料封包錯誤及抹失里德所羅門解碼(IP Datagrams Fixed Transport Stream Error and Erasure Decapsulation；IP–Fixed-TSEED) ，利用固定IP封包長度，補救更多因為缺乏正確Section檔頭的TS封包，可以大幅提升可更正資料的比例。本論文中我們使用均勻(uniform)通道和馬可夫(Markov)通道分析兩者解封裝的效能，最後並討論使用哪一種解封裝效能最佳。
並列摘要
The purpose of this study is to improve the efficacy of the Link Layer Receiver specified in the Digital Video Broadcasting-Handheld (DVB-H) standard. Since no decoding method for Link Layer is regulated in the DVB-H standard, we proposed two solutions: IP Datagram Fixed Transport Stream Erasure Decapsulation (IP-Fixed-TSED) and IP Datagram Fixed Transport Stream Error and Erasure Decapsulation (IP-Fixed-TSEED). To remedy the lack of a proper Section Header in the TS Packet, IP packets with fixed length can significantly increase the proportion of correct information. Uniform Channel and Markov Channel were used to simulate the performance of the two approaches. Which kind of Decapsulation may achieve the best performance is also discussed.