Cross-Layer Multi-Hopping Scheme for Efficient and Reliable Transmission in Fading Environment

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Multi-hop wireless ad hoc networks suffer from temporary link error due to fading. In order to improve packet transmission reliability and achieve efficient transmission in fading environment, this paper proposes an integrated dynamic multi-hopping scheme based on a cross-layer approach and cognitive behavior of local nodes. The scheme provides two important functions, temporary bypassing and dynamic shortcut, to achieve the goals. The proposed MAC protocol avoids their conflict by giving priority to the shortcut path over the bypass and original passes. Moreover, the transmission reliability can be further improved by triple-path diversity.