2008-01-26 23:48:11 +03:00
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2007-10-11 Benoit PAPILLAULT <benoit.papillault@free.fr>
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Conformance testing to the following standards:
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2008-07-17 10:38:23 +04:00
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* ETSI 301 893 v1.4.1 (dated 2007-07)
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* FCC
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* IEEE 802.11h-2003 (dated 2003-10-14)
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ETSI and FCC defines the regulation constraints and defines several roles :
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* "master"
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* "slave without radar detection"
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* "slave with radar detection"
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2008-01-26 23:48:11 +03:00
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Frequencies & channels where DFS is applicable:
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* ETSI : 5250-5350MHz , 5470-5725MHz
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* IEEE 802.11 center frequencies :
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5260, 5280, 5300, 5320
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5500, 5520, 5540, 5560, 5580, 5600, 5620, 5640, 5660, 5680, 5700
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* IEEE 802.11 channels :
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52, 56, 60, 64
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100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140
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Simulating a radar pulse:
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echo "<tsf> <rssi> <width>" > /proc/sys/dev/wifi0/radar_pulse
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Simulating a radar detected event:
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iwpriv wlan0 doth_radar
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2008-07-17 10:38:23 +04:00
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== Notes on DFS in various modes ==
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A VAP interface can be used in several modes:
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* IEEE80211_M_STA "sta" : DFS is implemented as "slave"
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* IEEE80211_M_IBSS "adhoc" : DFS is implemented as "master"
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* IEEE80211_M_AHDEMO "ahdemo" : DFS is implemented as "master"
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* IEEE80211_M_HOSTAP "ap" : DFS is implemented as "master"
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* IEEE80211_M_MONITOR "monitor" : DFS is not implemented
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* IEEE80211_M_WDS "wds" : DFS is implemented as "master"
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== Implementation notes ==
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sc->sc_curchan.privFlags & CHANNEL_DFS is set if ETSI/FCC compliance is
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required by regulation. It does not mean that 802.11h is required. This flag
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is automatically adjusted by ath_radar_correct_dfs_flags() according to the
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regulation for the specified frequency.
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ic->ic_flags & IEEE80211_F_DOTH is set if IEEE 802.11h is required. It matches
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dot11SpectrumManagementRequired as described in IEEE 802.11h. Default value is
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1 and can be changed at anytime by the user through iwpriv.
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ETSI/FCC mechanisms (Channel Availability Check, In-Service Monitoring, Channel
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Shutdown, Non-Occupancy Period) and IEEE 802.11h magnums (Selecting and
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advertising a new channel, ...) are implemented ONLY if both flags are set.
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