Changes between Version 9 and Version 10 of wireless/wifi


Ignore:
Timestamp:
01/12/2018 04:19:16 PM (3 months ago)
Author:
Bobby Jones
Comment:

Added 80211ac wave 2 to concepts section

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  • wireless/wifi

    v9 v10  
    875875 * [http://en.wikipedia.org/wiki/IEEE_802.11n-2009 802.11n] - added the capability of 40MHz channels referred to as 'HT' or High Throughput channels. When using 40MHz HT channels you must specify HT40- to use the current channel specified frequency and the 20MHz below it, and HT40+ to use the current channel specified frequency and the 20MHz above it
    876876 * [http://en.wikipedia.org/wiki/IEEE_802.11ac 802.11ac] - added the capability of 80MHz and 160MHz channels referred to as 'VHT' or Very High Throughput channels
     877  * Wave 2 - added an 80+80MHz configuration that could be set for two non contiguous bands to minimize interference
    877878
    878879Some drivers also support 'half' channel bandwidth (10MHz) and/or 'quarter' channel bandwidth (5Mhz) which is useful if you don't need the bandwidth provided by standard (20MHz) channels or HT/VHT channels and instead want more channel separation.
     
    889890 * [http://en.wikipedia.org/wiki/IEEE_802.11n-2009 802.11n] - added additional modulation schemes to allow several more rates and introduced the concept of a Modulation and Coding Scheme (MCS) index to describe them
    890891 * [http://en.wikipedia.org/wiki/IEEE_802.11ac 802.11ac] - added 2 additional MCS indexes for new 256-QAM modulation schemes
     892  * Wave 2 - Improved on the original Wave 1 release by adding MU-MIMO and an optional 4th spatial stream, see this [https://www.cisco.com/c/en/us/solutions/collateral/enterprise-networks/802-11ac-solution/q-and-a-c67-734152.html Cisco FAQ] for more information
    891893
    892894Notes: