I have the following situation: A radio transmission studio is located in a town and the FM transmitter on the top of a hill 2km away with perfect vision.
Currently the studio sends an RTP audio stream to the top of the hill using a pair of 5GHz Ubiquiti NanoBeams, and in the top of the hill the RTP stream is converted to audio and sent to the FM transmitter:
Sometimes the radio connection hangs up, the 5GHz radio gets a DFS (radar signal) and changes its frequency or magic happens and the link is cut.
After moving the radio bandwitdh to 10MHz the link has imporved a lot, but I want to design a duplicated transmission system.
What I want
I want to add a second 2.4GHz radio in parallel with the 5GHz link and send the same data duplicated in the both links, and discard the repeated packets on the other side.
I could do failsafe swithover with OSPF or with ethernet link bonding, or MPLS traffic engineering, but as far as I know (maybe I'm wrong), I will always have a switchover delay.
So what I want is to send the data duplicated from the studio to the top of the hill, like this:
This way, if thee are lost packets on one of the links, shut it down completely or have a DFS trigger on the 5GHz link, but all the packets would arrive to the destination.
It would be awesome if I could do this with MikroTik routers, but it would be also okay if I could implements it on OpenWRT or any other embedded Linux/Unix system.
