Application-Layer Coding with Intermittent Feedback under Delay and Duty-Cycle Constraints

We propose two application-layer coding schemes for delay-constrained point-to-point packet communications over frequency bands with restrictions on the transmitter's maximum duty-cycle. The schemes operate over GF(2) and utilize intermittently available receiver feedback for erasure correction. Simulation results for independent Bernoulli erasure channels, Gilbert-Elliott channels, and Long Range (LoRa) communications demonstrate orders-of-magnitude reductions in the delivery failure rate as compared to feedback-assisted repetition redundancy and a blind coding scheme that does not utilize feedback.