80211n [FreeBSD WIKI]

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====== 802.11n support ======

===== Overview =====

net80211 supports 802.11n STA, hostap and monitor modes. IBSS/adhoc and 802.11s have not been tested.

===== Features =====

The following features have been actively tested and used by the developers (this list isn't exhaustive):

  * 802.11n STA and hostap operation
  * 802.11n 1, 2, 3 stream devices
  * 1, 2, 3 stream STBC RX/TX negotiation (space-time block coding)
  * MIMO powersave negotiation
  * 11g/11ng coexistence
  * 11a/11na coexistence
  * HT/20 and HT/40 channel support, along with 20/40MHz STA coexistence

The following 802.11n features would be nice in the short term:

  * 802.11n LDPC encoding
  * 802.11n DFS support - the current support only functions with 802.11a channels
  * 802.11n rate control/selection in net80211 - currently, the rate control modules in net80211 only know about legacy rates

===== Chipset Support =====

Some of the wireless drivers support 802.11n. The following is an incomplete list.

  * iwn (Intel) NICs - 4965, perhaps others; STA mode only
  * ath 11n series NICs (AR5416, AR9130, AR9160, AR9280, AR9285, AR9287, AR94xx, AR95xx) - STA/AP mode, TX and RX aggregation
  * mwl NICs (88W8363 802.11n NIC)
  * rsu (RTL8188SU / RTL81892SU)
  * urtwn (RTL8188CU / RTL8188RU / RTL8188EU / RTL8192CU)