[Ground-station] P4G System Testbed Prototyping Scheme proposal

[Ron Economos]

Good stuff. For Phase 4 (of the test plan), there's already a simple 
frame mux available for the DVB-GSE block. It's in the VCM version of 
the DVB-S2/X transmitter.

https://github.com/drmpeg/gr-dvbs2

It's on the vcm branch.

git checkout vcm

Right now, it implements the mux with up to four TAP interfaces (tap0, 
tap1, tap2, tap3) with a simple round-robin scheduler. It could easily 
be modified to use one TAP interface and port numbers instead of 
separate IP addresses. Also, four is an arbitrary number (it can be more).

Since it's VCM, the four ports/addresses can have different MODCOD's.

Ron W6RZ

On 3/8/19 15:58, Paul Williamson via Ground-Station wrote:
> Phase 4: Modify the transmit flowgraph by adding a simple frame mux at
> the input to the GSE module. One input of the mux gets the multicast
> IP packet stream from the Opus encoder, as before. Other inputs stream
> from file sources or, optionally, from other multicast IP packet
> streams from other computers.
>
> On the Raspberry Pi, wrap VLC in a simple UI that allows a user to
> select which of several multicast IP addresses to monitor.
>
> Demo: show that the Raspberry Pi can switch around among the multiple
> audio streams at will.
>