臺灣博碩士論文加值系統

隨著現代科技的進步和電子產品的盛行，每個人手中都會有一台以上的筆記型電腦或個人數位助理設備，因此網路的需求量也隨之漸增。IEEE802.11無線區域網路沒有架設線路的問題，且能在移動的同時使用網際網路。為了要因應人們大量資料傳輸、提高資料服務品質以及更快傳輸速率的需求，因此無線區域網路不斷地被修改和更新，從而制定出目前最新的IEEE802.11ac規格。
為了增加吞吐量和傳輸速率，IEEE藉由修改IEEE802.11n而制定了IEEE802.11ac，也稱之為較高吞吐量 (Very High Throughput, VHT)，這對MAC層而言引入了一些新特性。對於這些特性，本論文將比較新版802.11ac MAC層與舊版802.11e MAC層之間的基本通道存取方法和有支援服務品質(QoS) 的通道存取方法。此外，也將針對舊版802.11e MAC層沒有提及的無線網狀網路通道存取方法，以及舊版更新了哪些資訊加以詳細說明。最後，我們將針對802.11ac與舊版802.11e有不同特性之處實際做介紹。

As the huge progress of modern technology and the prevalence of personal electronic devices, each person have more than one laptop or personal digital assistant devices. Therefore, the requirement of the wireless internet increases as well. IEEE802.11 Wireless Location Area Network (WLAN) resolves the problem of constructing wires, and also provides internet service while users are moving. In order to deal with the requirement of a large number of data transmissions, WLAN standard has been constantly updated and modified, the latest specification is IEEE802.11 ac.
To increases throughput and transfer rate, IEEE modifies IEEE802.11n and defines IEEE802.11ac, known as Very High Throughput (VHT) which support some new features of MAC layer. This thesis will compare basic channel access method and QoS channel access method of IEEE802.11ac MAC layer with IEEE802.11e MAC layer. In addition, this thesis will also illustrate Wireless Mesh Network (WMN) channel access method which was not mentioned in the older IEEE802.11e MAC layer, and describe all the updated information.

目錄

中文摘要.................................................................................................................i
英文摘要................................................................................................................ii
誌謝.......................................................................................................................iv
目錄........................................................................................................................v
圖目錄...................................................................................................................vi
第一章 緒論..........................................................................................................1
第二章 IEEE802.11ac 介面存取層.....................................................................2
2-1基礎分散式協調功能........................................................................3
2-2基礎集中式協調功能........................................................................8
2-3 MU-MIMO回應程序......................................................................10
第三章 IEEE802.11ac 支援QoS之介面存取層...............................................13
3-1 EDCA介紹.......................................................................................14
3-2 HCCA介紹.......................................................................................22
3-3整批確認訊框...................................................................................23
3-4 EDCA傳輸機會共享.......................................................................26
第四章 IEEE802.11ac 無線網狀網路之介面存取層........................................28
4-1 MCCA介紹......................................................................................29
第五章 結論.........................................................................................................36
參考文獻...............................................................................................................37

參考文獻

[1]IEEE Std. 802.11,“Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications,”2012.
[2]IEEE Std. 802.11ac,“Wireless LAN Medium Access Control (MAC) and Physical Layer (PHY) Specifications,”2013.
[3]林佳慧著，「以動態競爭視窗調整機制改善無線區域網路IEEE802.11e規格之效能」，碩士論文，國立台北科技大學，台北，2008。
[4]Eldad Perahia and Robert Stacey, “Next generation wireless LANs：802.11n,802.11ac,and Wi-Fi direct,” Cambridge University Press, 2013.
[5]Eldad Perahia and Michelle X. Gong, “Gigabit Wireless LANs: an overview of IEEE 802.11ac and 802.11ad , ” New York, 2011.
[6]鄭欣明、林風、黃帝韋著，「無線網狀網路無線電資源與移動性管理之研究」，國立台灣大學資工學系，台北，2006。