How to Lower Congestion with Cross-Layer MPR-PHY/MAC Design?

Abstract—In this paper we introduce a cross-layer design between PHY and MAC for multiple packet reception (MPR). Based on the simulation results, three phases of operation has been identified for MPR-PHY/MAC design depending on the offered load to the network. The design is suitable for multi-hop ad-hoc networks. The heterogeneous nature of the colliding packets in multi-hop ad-hoc networks, both in size of the packets and the arrival times of the packets, requires a sophisticated design to enable MPR. MPR can resolve congestions in a multi-hop network and improve the Goodput of the network. Simulation results show that the saturation Goodput of a network using our proposed MPR-PHY/MAC design is better than that of a network using standard IEEE 802.11 PHY and MAC by a factor of 50 % or more. I