On Thu, 2009-11-26 at 18:26 +0100, Lukáš Turek wrote:
> It consists of a new nl80211 parameter:
> [NL80211_ATTR_WIPHY_DISTANCE] = { .type = NLA_U32 },
>
> The value of the parameter would be a link distance in meters, so after the
> support is added to iw one could set the ACK timeout on a 3km link using:
> # iw phy0 set distance 3000
>
> Another required change would be extending cfg80211_ops by functions
> set_distance and get_distance. Calculation of appropriate ACK timeout (and in
> the case of ath5k, also CTS timeout and slottime) for the distance would be
> left to the driver (it's a trivial formula).
>
> I can prepare the patches, if you think these extension would be acceptable.
> Suggestions are welcome.
I discussed this with Alina a while back (in private, she didn't want to
discuss in English) and we came to the conclusion that set_coverage()
should be done like 802.11-2007 17.3.8.6 specifies for 5ghz, but could
be done for 2.4ghz as well. Thoughts? It would also allow us to actually
advertise that to compatible clients.
johannes
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