Analysis of ARQ schemes

Although the wireless communication systems offer limitless possibilities of service utilization, these systems are not error free. Variable error rate of these systems is the main reason of being concerned with error control techniques. Selection of suitable error control techniques is very important and depends on performance. We can choose from three basic techniques Send-and-wait, Go-back-N and Selective repeat. Nowadays, Hybrid Automatic repeat request techniques have the best aptitude for solving the problem with error detection. The thesis deals with division and functioning of Automatic repeat request schemes. In particular, we focus on the efficiency criterions of Automatic repeat request schemes--throughput and computational complexity. These criterions are presented based on simulations for Go-back-N scheme.