FEC-Based AP Downlink Transmission Schemes for Multiple Flows: Combining the Reliability and Throughput Enhancement of Intra-And Inter-Flow Coding
The authors consider downlink Access Point (AP) networks and the corresponding reliable transmission schemes. It is well known that one can protect the network traffic against packet erasures by Forward-Error-Correcting-codes (FEC). In addition to ensuring reliable delivery, FECs could substantially reduce the amount of feedback traffic, which is critical when designing high-performance AP protocols. In this paper, they generalize the FEC-based schemes, also known as intra-flow coding schemes, for multiple downlink flows. In contrast with the classic approach that performs FEC separately on individual flows, they propose a new protocol MU-FEC, which incorporates the recent idea of inter-flow coding to further enhance the achievable throughput.