Hello Rene, Sven,

On Sun, Nov 04, 2012 at 04:39:04PM +0100, Sven Eckelmann wrote:

On Sunday 04 November 2012 16:32:00 Rene Bartsch wrote:

...

Does B.A.T.M.A.N support some kind of broadcasting node positions?

The idea is to broadcast TX-Power/RX-Gain and the position of a node determined by a GPS-device to create maps with network coverage.

No, batman-adv and batmand don't support this kind of semantic data exchange. But the new daemon alfred is (will be?) flexibible enough to do these kind of things together with batman-adv. Maybe you can ask Simon and help him to create alfred.

Yep, we have received quite a few requests to transport arbitrary information (node gps position, host name, neighbor information, client station list, the weather forecast, etc ...). Actually we don't want that in batman-adv to not bloat the kernel code, so we are currently in the process to implement a userspace daemon to allow broadcasting this kind of data - in a clever way, that is collect information on one (or a few) designated servers and request from then.

This software is called A.L.F.R.E.D (Almighty Lightweight Fact Remote Exchange Daemon), and it's still in the middle of development[1] and will not be usable for productive use right now. As soon as it is finished, we will move the vis server to it, and it will be possible to use for custom purposes (like your tx-power/rx-gain/... info).

I'd like to ask for a little bit more patience, we will announce a release as soon as we consider it usable. :)

Thanks, Simon

[1] http://git.open-mesh.org/alfred.git

That's an option, of course.

But centralized servers are a single point of failure. So my idea is any node broadcasts his GPS position with TX- and RX-Gain. Any node can e.g. use a transparent HTTP-proxy to provide a map to the LAN attached. In case of a Google Maps overlay, each node can be displayed on the map with a coverage radius calculated by TX-/RX-gain. By using the "navigator.geolocation.getCurrentPosition".tag the map can be centered to the current position of the HTTP-client. Info-boxes on the nodes can use the RX-/TX-gain of the mouse-over-node and the HTTP-client to show the theoretically maximum link speed. That would improve nomadic use und finding gaps in network coverage. The geographic positions can also be use to optimize routing and beam-forming, e.g. calculating vector and distance of the first fresnel zone of the next node.

Regards,

Renne

Am 04.11.2012 18:53:11, schrieb Ray Gibson:

I'm doing this with my nodes but I have a garmin receiver hooked up to a serial port on a routerstation pro, and using a combination of cat, sed, awk, bc, and tail to get determine the coordinates and wget to post them to another server that handles the mapping. Pretty simple actually.

Ray

On 11/4/2012 7:32 AM, Rene Bartsch wrote:

Hi,

I'm new to B.A.T.M.A.N, so a "Hello" to all! :)

Does B.A.T.M.A.N support some kind of broadcasting node positions?

The idea is to broadcast TX-Power/RX-Gain and the position of a node determined by a GPS-device to create maps with network coverage.

Is that possible anyhow?

Regards,

Renne

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