802.11 Ad-hoc/IBSS network question

blakehew

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Jan 18, 2000
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Ive been working with a wireless embeded module and have had some trouble with adhoc networking. The module has 2 options for adhoc networking, Join only, and Join or create. We want highly reilable networks with not single point of failure so we set up all of our embeded devices in Join or create mode that way no one node is responsible for the creation of the network and any one node can die and the rest of the devices would still work. The problem is that if both nodes are powerd on simoutaianiously then they both create an adhoc network with the same SSID but with a diffent random bssid and they do not talk to each other. This is also a problem if for example one of the nodes powers off and then comes back up and doesnt initaly see the seconds nodes previoulsy created adhoc network so it creates its own and again they do not communicate. We have resolved this problem by doing a periodic scan of the network and if there are multiple networks with the SSID then if there is a network that has a lower value bssid we will dissaociate from our current network and associate with that one. Now this works fine and dandy for us if there is a network of only our devices, but what about other manufacures implementations of ad-hoc? Does anyone know if there is a standard way that this problem is addressed by other manufacutres? If there was a device from another manufacure that did it diffently then if someone sets up an adhoc network with other devices there could potentaly be a problem. I have searched and searched and have not found anything related to this problem. If no one has any ideas does anybody know of a good forum that i could ask this technical of a 802.11 question in?

Thanks