ratelessly

The scheme is decentralized, requiring no co-ordination, and can be operated ratelessly. that is, it can be run indefinitely until successful reception (at which stage that fact is signaled to all nodes, …

The derivation relies on the facts that when the source ratelessly broadcasts, the capacities Cs and C1 in the S–D and S–R links, respectively, are approached at the same time, and that when the relay ratelessly transmits toward the destination, the capacity C2 is realized.