October 2012
Intermediate to advanced
160 pages
2h 49m
Chinese
Content preview from 802.11n技術手冊
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第八章
啟用群播到單播的轉換
部分 AP 實作一個將單一群播訊框轉換成一系列單播訊框的特性。群播必須在所有
接收端能夠解碼的速率內傳輸，因此速度相對的會很緩慢。如果接收端鄰近 AP，單
播訊框可以傳送的較快。一系列正面回應的單播訊框可能要花上接近傳輸時間相同
的時間，但是它有更顯著的可靠性。
實作查核清單（Implementation Checklist）
在設計和建置一個網路時，可以使用以下的查核清單：
選擇一個架構
架構的簡單選擇，就是管理面必需要是集中式的。在大多數的情況下，交融分散式
資料面與集中式轉發的混合資料面是一個正確的選擇。根據應用的需求和成本，細
心評估管理面位置的取捨。
硬體選擇
選擇 Wi-Fi 聯盟認證，並符合性能及功能要求的硬體。
覆蓋規劃
配置出一個 5 GHz 的覆蓋網路，並且根據所需打開 2.4 GHz 無線電以提供覆蓋。如
果要提高性能可考慮將 40 MHz 頻道打開。
應用的調校
調整信標間隔、DTIM 及資料速率以適應在網路上的應用。
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.