I am going to describe a type of communication protocol that I've seen used with ARINC 429 and would like to know if there is a proper name and classification for this type of communication... Anyway, I'll try to describe as accurately as possible.
So there is an outgoing stream of communication (like a heart-beat) that an LRU expects to receive. The LRU also expects to receive certain data on that same heart-beat bus... So, you'd have to sort of inject the ARINC word data into the heart-beat stream temporarily to send it to the LRU.
Is there a name for that sort of communication?
I think I've also seen similar protocols with serial communications... Where a data stream (heart-beat) is always being sent, but the pay-load changes when you need to transmit/receive meaningful data.
I am looking for the technical terms to describe this communication process.