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研究生： 李欣紘
Xin-Hong Li
論文名稱： 低速無線網路之規範研究
Research on low-data-rate wireless network
指導教授： 王煥宗
Huan-Chun Wang
口試委員: 林敬舜
CHING-SH-LIN
高典良
TIAN-LIANG KAO
梁明全
MING-QUAN LIANG
學位類別： 碩士
Master
系所名稱： 電資學院 - 電子工程系
Department of Electronic and Computer Engineering
論文出版年： 2018
畢業學年度： 106
語文別： 中文
論文頁數： 44
中文關鍵詞： 802.11ah 、Non-TIM station 、省電模式 、無線網路 、低速
外文關鍵詞： 802.11ah, Non-TIM station, TWT, Wireless netork, Low data rate
相關次數： 點閱：187  下載：1 
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    • 本論文主要是針對低速無線網路為目標並以IEEE P802.11AH/D10.0 Draft Standard 規範書進行深入研究及探討，由於目前規範書屬於草稿階段，部分規格尚未定案，此論文是針對現有的規格加以研究並以未來能夠實際運用在開發板上為目標。論文內容以802.11AH省電模式中的Non-TIM Station為主軸，從掃描階段一直到設定Non-TIM Station之專屬功能TWT之間所交換的訊息及應用，及討論可能面臨到的大量Station同時送出NDP Probe Request、長時間休眠導致時間同步上的問題。由於為了增加傳輸範圍及穿透性，而使用頻寬2M來達成較低的資料傳輸速率，最後比較使用頻寬20M及正常速率802.11Legacy與802.11AH中MAC Timing的參數變化而找出適合802.11AH的時間參數。

    The main purpose of this issue is to research low-data-rate wireless network and refer to IEEE P802.11AH/D10.0 Draft Standard. Since this SPEC is still an unapproved draft(2016/09) which is subject to change , we mainly aim at the current information to deeply research and expect to work on the development board in the future. We focus on the Non-TIM Station which is one of power saving mode in 802.11AH , studying from scanning procedure to TWT function setup procedure. We'll encounter some problem such as massive station sending out probe request simultaneously then leading to collision and synchronization between AP and long-term sleeping station. Due to wild range transmission and good penetration , we use bandwidth of 2M to achieve low-data-rate and compare the MAC timing parameter between 802.11 legacy and 802.11 AH to infer the suitable parameter for 802.11AH

    第一章 緒論 1.1 研究背景 1.2 論文架構 第二章 Non-TIM Station Operation Overview 2.1 Active scanning 2.1.1 Active scanning procedure 2.1.2 Active Scanning Procedure - station與AP所交換的訊息 2.1.3 Format及information element 2.1.3.1 NDP probe request 2.1.3.2 Probe request 2.1.3.3 PV1 Short probe response 2.1.4 Active scanning probing procedure面臨問題討論 2.2 Passive scanning 2.2.1 Passive scanning procedure 2.2.2 Passive Scanning Procedure - station與AP所交換的訊息 2.2.3 Format及information element 2.2.3.1 Authentication control information element 2.3 TWT Setup 2.3.1 透過 Association Procedure 2.3.2 透過TWT Setup Frame交換 2.3.3 TWT Setup過程所交換之訊息 2.3.4 Implicit TWT 2.3.5 Explicit TWT 2.3.6 TWT Grouping 2.4 TWT Synchronization 2.4.1 使用NDP Paging Frame 2.4.2 使用TWT-ACK Frame 2.5 Periodic RAW Setup 2.6 MAC Timing definition 附錄A Frame Format and Information Element A.1 Probe Response Option Bitmap A.2 S1G Capability Information Element A.3 Target Wake Time format A.4 T-ACK frame format A.5 STACK frame format A.6 TWT Group Assignment A.7 NDP paging field in TWT IE A.8 Periodic RAW format 附錄B MAC Timing Spacing Value Definition 參考文獻

    [1] Wireless LAN medium access control and physical layer specification-Sub 1 Ghz license exempt operation
    [2] Wireless LAN medium access control and physical layer specification
    [3] IEEE 802.11AH: THE WIFI APPROACH FOR M2M COMMUNICATIONS
    [4]11ah Interframe Spacing Values
    [5] MAC Header Compression
    [6] WiFi-Nano : Reclaiming WiFi Efficiency through 800 ns slots
    [7]Wireless MAN medium access control and physical layer spec

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