On Wed, Jul 16, 2003 at 06:32:53PM -0400, Greg Troxel wrote: > I don't recall the standard speaking to the issue of "merging" two > IBSSs. But it seems clear to me that IBSSs with the same SSID should > join together somehow - at least because that's what I want to have > happen.
I don't think the 802.11 standard concerns itself with merging two IBSSs. WECA took up this issue, however, and their interoperability standard requires a STA to switch to the oldest IBSS (as indicated by the TSF carried by the beacons) with the same SSID on the same channel. I have been able to depend on Prism firmware versions 1.4.9 and 1.5.6 to do WECA-compliant IBSS merges. I have no idea which versions of Lucent firmware do a proper merge. Note that under the WECA rules, two IBSSs which have formed with the same SSID in the same airspace but on different channels do not have to merge. Also, a station with a choice of IBSSs with the right SSID will usually join the IBSS which sends the loudest beacon or probe response instead of the oldest IBSS (the IBSS with greatest TSF). > Does anyone know if this behavior is universal with all cards that > support IBSS mode? Specifically, how about IBSS mode on the ADMtek > and Atheros chipsets? I doubt that the ADMtek chip does IBSS merges by itself. In my ADMtek driver, I have put some rudimentary logic into atw_recv_beacon for detecting and joining the oldest IBSS on the channel which has the correct SSID. I do not account for Rx and other latencies, yet. No idea about Atheros. Dave -- David Young OJC Technologies [EMAIL PROTECTED] Urbana, IL * (217) 278-3933 -- general wireless list, a bawug thing <http://www.bawug.org/> [un]subscribe: http://lists.bawug.org/mailman/listinfo/wireless
