The document discusses interest management techniques for peer-to-peer architectures without global information. It introduces frontier sets, which are based on cell-based visibility to reduce unnecessary location updates. Frontier sets for two peers consist of cells visible to one but not the other. The document proves this is a valid approach and evaluates its performance savings compared to naive updating of all peers. It also covers Voronoi overlay networks, which define areas of interest to dynamically determine relevant neighbors to exchange updates with.