Patent ID: 6446031
Filing Date: 2002-09-03
Classification: H04B,H04W

Abstract:
A computerized method for determining the signal coverage provided by a wireless communication system of at least one point source, such as a transmitter, and at least one receiver in a building that is based upon a model, comprising the steps of:physically designating locations of the at least one point source and the at least one receiver in the model of the building; covering completely and without overlap, the space around a point source by a plurality of cones of about equal size; assigning relative signal strength to each of said plurality of cones based on the angular orientation of a transmitter at said point source and a spherical antenna pattern associated with the transmitter; processing in a forward direction from said point source to the receiver a center ray segment of each said plurality of cones corresponding to transmitted and reflected portions of said center ray segments in uninterrupted travel between modeled building surfaces; providing receiver test points arranged in regularly spaced, rectangular, planar receiver grids on the modeled building surfaces; computing the intersection of said cones with said receiver test point grids; enumerating the receiver test points within said cone intersections for the accumulation of electromagnetic effect of said ray segment on said receiver test point; adjusting the physically designated locations at the at least one point source and the at least one point source and the at least one receiver in the model of the building, as is needed, to ensure adequate signal coverage; and placing transmitters and receivers within the building based upon the model.