Cross-Layer Design of Random On-Off Accumulative Transmission with Iterative Detections
Random On-Off Accumulative Transmission (R-OOAT) is a cross-layer technique that can achieve collision-tolerance in the Media Access Control (MAC) layer by leveraging on the signal processing capability in the PHYsical (PHY) layer. In this paper, a new PHY/MAC cross-layer design is proposed for the R-OOAT framework. In the PHY layer, the authors propose an iterative method for the detection of R-OOAT signals colliding at the receiver, such that the transmitted information can be recovered with a low complexity in the presence of severe signal collisions. The iterative detection is enabled by the unique signal structure of the R-OOAT, and it can operate in both coded and uncoded systems.