I’m experiencing some odd behavior with the Header Payload Demux (HPD)
block. I’m using a Tx/Rx loopback simulation with full synchronization
channel model in the loop. The simulation begins with all channel model
parameters turned off. For the sake of this discussion, the channel will
always be in the off state.
When I start the simulation, it will sometimes run for over a minute
I see the HPD output freeze and sometimes only for a second or two. The
freeze always starts at the HPD block, and then as buffers fill, all the
preceding blocks become frozen (frozen in the sense that all outputs
changing as seen on Qt GUIs). GNU Radio itself does not freeze. I have
placed a message debug block to display the Packet Header Parser
and I always see that this stops updating first. The messages will be in
good state, identifying packet number and payload length and then
just stop. No more messages at all.
I’m not sure what’s causing this behavior. Does anyone have an idea? I’m
happy to provide more information.