Hello All!,

I am just wondering what kind of speeds I could expect to see on a BBHN Intranet network.

If I had, say, two nodes on the roof of two very tall buildings that were about 30 miles away from each other but were just about line of site from each other when you were on the roof, what data speeds could I expect to see between the two nodes?

73!,

KD8NXH

Depending on the hardware, band, bandwidth, clear line of sight and clear Fresnel zones, I dont see why you couldnt get up to 100MB/s or better.

If your Fresnel is a bit obstructed or SNR is a bit low, you can lower your bandwidth to get a better signal at the cost of speed.

73

KTF

KTF, All,

OpenWRT based 802.11 adhoc mode usage that we are running OLSR on top of in BBHN is only 802.11a and max possibility is 54Mbps of raw protocol bits back and forth. One would have to go to 802.11n modes to obtain the 40Mhz channels or MIMO dual spacial streams to be able to achieve a higher rate. OpenWRT (that BBHN is on top of) only has these rates implemented in 802.11 AP mode (not used by MESH) for atheros ath9k chipsets in Ubiquiti hardware.

Here's an example of the rate control algorithm under OpenWRT (Barrier Breaker newer version) of the rates in use from a live node. This node is finding 5.5Mbps as the optimal rate to use. Note max of 54Mbps. This is a NSM2.  

https://drive.google.com/file/d/0B2bEy75HhwWhRFVVRU56akNzWDg/view?usp=sharing

Joe AE6XE at arrl.net