WIRELESS TELECOMMUNICATIONS SYSTEM AND METHOD FOR DESIGNING SAME

摘要

A method for designing a wireless telecommunications system having a plurali ty of cells is provided. In one embodiment of such a method, a call demand per cell is estimated, and a channel demand based thereon is determined on a cell-by-cel l basis. The cell-by-cell channel demand is used to provide a reasonably tight upper bound on the number of communication channels required to satisfy the system-wide cal l demand. It is implicit in the procedure for estimating the upper bound that no mutually "interfering" base stations use the same channel (i.e., frequency). "Cliques " of mutually-interfering base stations or cells are defined. A channel demand is determined for each clique by adding up the channel demand for each cell in the clique. The greatest channel demand of all cliques determines a "maximum clique demand" .omega. d. The upper bound on the number of channels required to satisfy the system-wid e call demand is given by the expression: X d ~ 17/12 ~ w d when mutually-interferi ng cells are adjacent cells, and is given by the expression: X d ~ 2 ~ .omega. d min when mutually interfering cells are adjacent cells and next-to-adjacent cells, wherein d m in is a minimum channel demand of all cells in the system. Having a reasonably-good estimate of the upper bound on the system-wide channel requirement, a wireless service provider may then seek to obtain or allot a commensurate amount of frequency spectrum to support its system.