The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 07, 1999
Filed:
Mar. 26, 1998
Sanjeev Khanna, Highland Park, NJ (US);
Krishnan Kumaran, Scotch Plains, NJ (US);
Lucent Technologies, Inc., Murray Hill, NJ (US);
Abstract
A method for designing a wireless telecommunications system having a plurality 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-cell 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 call 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..sup.d. The upper bound on the number of channels required to satisfy the system-wide call demand is given by the expression: .chi..sup.d .ltoreq.17/12.multidot..omega..sup.d when mutually-interfering cells are adjacent cells, and is given by the expression: .chi..sup.d .ltoreq.2.multidot..omega..sup.d -d.sub.min when mutually interfering cells are adjacent cells and next-to-adjacent cells, wherein d.sub.min 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.