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Performance analysis of dual-mode selective repeat ARQ mechanism in fading channel environments

In this paper, we propose DSR (dual-mode selective repeat) ARQ which performs error recovery based on a retransmission mechanism in fading channel environments. The DSR mechanism supports two different modes such as normal transmission and recovery mode. When transmission buffers are full due to waiting packets, the sender performs duplicate retransmission for the first frame of the transmission buffer. From performance analysis for data transmission, the DSR mechanism shows better performance than the conventional SR mechanism in fading channel environments.