A framework for spatial reuse in dense wireless areas

This paper introduces an efficient method for communication resource use in dense wireless areas, where all nodes must communicate with a single destination node. By employing a large number of active radio nodes as relays, and exploiting a common direction of communication toward the single destination, this method groups nodes based on their location and creates a structured multi-hop configuration in which each group can forward its neighbor's data. Such configuration allows spatially separated groups to reuse the limited spectrum resources. Optimum spectral allocation among groups is then embedded in a conventional joint routing and resource allocation framework to obtain a centralized convex optimization problem. This problem's solution achieves optimal coordination among wireless-network lower-layer protocol stack and thereby significantly improves network performance.