Changes between Version 19 and Version 20 of 802.11/app_notes/FDD-NoMAC
- Timestamp:
- Feb 15, 2017, 12:18:57 PM (7 years ago)
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802.11/app_notes/FDD-NoMAC
v19 v20 390 390 391 391 (1) This app note intentionally does not use the DCF application in CPU Low. The 802.11 DCF is designed explicitly for TDD operation. The DCF assumes all nodes transmit and receive on a common channel and that nodes cannot transmit while receiving. Further it seeks to achieve transmission by 1 node at a time with well-defined rules for when nodes are allowed to transmit following activity on the common channel. All these properties are incompatible with FDD. Building a random-access MAC for an FDD system would be an interesting project but is far beyond the scope of this app note. 392 392 393 (2) The evaluation took place with RF cabling + attenuators connecting the RFA on the AP to RFA on the STA as well all RFB on the AP to RFB on the STA. Because there is no underlying random access MAC, this FDD implementation is sensitive to interference present in the 2.4GHz and 5GHz channels. Testing over a wire eliminates this interference for the purpose of this study.