A selective repeat request with continuous multiple transmissions for a message

Automatic repeat request (ARQ) is very effective in error control and among various ARQs, selective repeat gives the best throughput characteristics w here infinite-capacity buffers are theoretically required in the transmitte r and receiver stations. Therefore, in practice, a modified selective repea t request method with a finite-capacity buffer must be devised. In this pap er, a selective repeat method is proposed where multiple frames correspondi ng to a message may continuously be sent. Based on the error rate, number o f repeats, and round-trip delay time, the appropriate number of multiple tr ansmissions for maximum throughput in the case of a finite-capacity buffer is derived. It is shown that good throughput characteristics can be achieve d in the proposed method with an appropriate number of multiple transmissio ns. (C) 2001 Scripta Technica.