Lesson plan
Resource Unit
A Resource Unit (RU), in OFDMA terminology used in 802.11ax WLAN, is a given 78.125 kHz bandwidth subcarrier (tone) used in both DownLink (DL) and UpLink (UL) transmissions. With OFDMA, different transmit powers may be applied to different RUs. There are maximum of 9 RUs for 20 MHz bandwidth, 18 in case of 40 MHz and more in case of 80 or 160 MHz bandwidth. The use of RUs enable an access point to allow multiple WLAN stations to access it simultaneously and efficiently.
Article summary
A Resource Unit (RU), in OFDMA terminology used in 802.11ax WLAN, is a given 78.125 kHz bandwidth subcarrier (tone) used in both DownLink (DL) and UpLink (UL) transmissions. With OFDMA, different transmit powers may be applied to different RUs. There are maximum of 9 RUs for 20 MHz bandwidth, 18 in case of 40 MHz and more in case of 80 or 160 MHz bandwidth. The use of RUs enable an access point to allow multiple WLAN stations to access it simultaneously and efficiently.
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Discussion questions
- Summarise the article in your own words. Which single claim would you verify first, and why?
- Which claim in this article is most likely to be revised as the sources update? How would you check its current status?
- If two sources disagreed about one of these facts, what would you need in order to trust one over the other?
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