An improved point-to-multipoint GB(N) ARQ scheme for high speed satellite communications

This paper proposes and evaluates a point-to-multipoint GB(N) scheme with memory at receivers, suitable for high speed satellite communications. Its key idea is to store errorless messages received during an error recovery procedure. It avoids buffer overflow, reduces the round trip delay effect, is easy to implement and presents a good performance under a wide range of conditions. It is shown that the proposed protocol throughput efficiency is better than the best known multipoint GB(N) scheme results. In addition, in environments with a large number of receivers, it outperforms a known multipoint selective repeat protocol, under a wide range of bit error rate