Adaptive Relaying for Streaming Erasure Codes in a Three Node Relay Network

This paper investigates adaptive streaming codes over a three-node relayed network. In this setting, source node transmits sequence of message packets to destination with help relay. The source-to-relay and relay-to-destination links are unreliable introduce at most N 1 xmlns:xlink="http://www.w3.org/1999/xlink">2 packet erasures, respectively. must recover each within strict delay constraint xmlns:xlink="http://www.w3.org/1999/xlink">T . presents new construction for all feasible parameters { , }. Our work improves upon the in Fong et al. by adapting relaying strategy based on erasure patterns from Specifically, code employs notion symbol estimates, which allows relay forward information about symbols before it can decode that symbol, variable-rate encoding, decreases rate used encode as more erasures affect packet. proposed achieve rates higher than ones whenever > same when ≤ case is optimal. also an upper bound achievable takes into account both order second link. shown be tighter trivial considers only