On Thu, Mar 25, 2010 at 05:27:57PM -0700, Bruno Randolf wrote: > On Friday 26 March 2010 06:13:11 Luis R. Rodriguez wrote: > > > > - Improve beacon averaging algorithm for IBSS: Maybe we should keep > > > > track of > > > > > > > > the average RSSI on a per-node basis and use the minimum of those in > > > > order not to loose far away nodes? The other option would be to limit > > > > the parameters we control similar to AP mode. > > > > > > We have talked about this before. I thought that we agreed > > > that adhoc nodes may > > > > > > a)be activated at any time > > > b)be positioned at an unknown distance apart > > > > > > it therefore makes no sense to average the RSSI over the current nodes. > > > If all the current nodes in the network are close by, the ani algorithm > > > will wind the sensitivity down. Consequently, if a remote node is > > > started, it will not be able to connect. Yet, the remote node should > > > have been able to connect as the slot times etc were long enough, > > > and the link budget is fine... > > i'm not sure how big the effect of ANI is - would it really shut the remote > node out completely? or would just performance degrade? also beacons are sent > at the lowest rate, so they will travel far. this needs to be tested! it > doesnt make sense to discuss this based on hypothetical assumptions. > > > > So yes, the only way to > > > > > > > - Improve beacon averaging algorithm for IBSS: > > > is to turn ani off. which means the issue you raised else where of > > > providing reasonable userland controls (not via debugfs) becomes > > > important. > > > > If ANI helps IBSS so much then why not just default to turning it > > off within the driver? > > i would say in most standard cases, IBSS nodes are close together or at a > similar distance, so it does make sense to use ANI by default. > > as well, we all agree that there should be userland controls. the questions is > just about the interface to use. ANI is specific to Atheros cards so debugfs would do it. If we want to have a more rigit API we could use a configfs entry for ath9k. Luis -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
