Coloring spatial point processes with applications to peer discovery in large wireless networks

In this paper, we study distributed channel assignment in wireless networks with applications to peer discovery in ad hoc wireless networks. We model channel assignment as a coloring problem for spatial point processes in which n nodes are located in a unit cube uniformly at random and each node is assigned one of K colors, where each color represents a channel. The objective is to maximize the spatial separation between nodes of the same color. In general, it is hard to derive the optimal coloring algorithm and therefore, we consider a natural greedy coloring algorithm, first proposed in [5]. We prove two key results: (i) with just a small number of colors when K is roughly of the order of log n/ log log n, the distance separation achieved by the greedy coloring algorithm asymptotically matches the optimal distance separation that can be achieved by an algorithm which is allowed to select the locations of the nodes but is allowed to use only one color, and (ii) when K = Ω(log n), ...

• Type: Conference
• Year: 2010
• Where: SIGMETRICS
• Authors: Jian Ni, R. Srikant, Xinzhou Wu
• Keywords: Channel Assignment, Coloring Algorithms, Greedy Coloring Algorithm, Hardware, SIGMETRICS 2010