Physical layer based approach for advanced directional networking

In this paper, advanced directional networking technology is proposed which achieves full directional capability using physical layer assets including propagation modeling and sets of directional antennas. In the proposed approach each node, referred to as an advanced node, consists of an appropriately timed scanning array for mobile user discovery, a dynamically beamformed array for communication with mobile users and an adaptive array for node-node and node-core network connectivity. Procedures are developed to enable full directional link between advanced nodes and mobile users, and with the help of high-end FPGA's, are shown to conform to the timing requirements of Medium Access Control (MAC) layers of existing IEEE 802.11 standards. The proposed procedures, therefore, are based on advanced Physical Layer capabilities with no changes in the rest of the layers of Open Systems Interconnection (OSI) layer stack. Directional antenna arrays, geospatial-based propagation modeling algorithms, and extended sectoral networking as well as signal processing algorithms are developed for supporting the proposed advanced node approach. Trade-offs in scanning timing, user AoA and the integration in IEEE 802.11 standards are simulated and obtained results will be presented.

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