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.