A naive idea of improvement is to replace Voronoi
diagram with square mesh constructed by the well-known
quorum technique (Quorum for short) [20]. That is, service
providers propagate their location information in four
geographic directions, i.e., north, east, south, and west,
across the entire network; the propagation paths form a
mesh structure as service directory. Although this method
requires only local computation, it can generate inconstant
storage load on network nodes if service providers are all
placed in a line, and it also makes the localized in-cell
lookup no longer able to provide the closest/nearby service
selection guarantee because the mesh structure bears no
proximity property.