WIRELESS FREQUENCY RE-USE DETERMINATION SYSTEMS AND METHODS

• US 20080049664A1
• Filed: 10/08/2007
• Published: 02/28/2008
• Est. Priority Date: 04/24/2001
• Status: Active Grant

• Current Assignee: Bellsouth Intellectual Property Corporation (AT&T, Inc.)
• Original Assignee: Bellsouth Intellectual Property Corporation (AT&T, Inc.)
• Inventors: Johnson, Derek, Austin, Mark, Latiolais, Dock, Jabbary, Ali
• Granted Patent: US 8,103,280 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04W 16/18 Network planning tools
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition

Abstract

A method of measuring frequency interference between adjacent cell sites in a wireless telecommunications system. The method includes selecting a frequency in a cell site to be used as a beacon frequency. The method also includes activating the beacon frequency in the cell site and recording, at a telecommunications switch, a signal strength of the beacon frequency as measured by a first wireless device operating in the cell site and a signal strength of the beacon frequency as measured by a second wireless device operating in another cell site. The method further includes determining the frequency interference between the cell site and the other cell site based on the signal strengths.

Claims

1. A method for mapping system wide frequency interference among a plurality of cell sites of a wireless communication system using a phantom frequency, the method comprising:

selecting a frequency to be used as the phantom frequency;

designating a cell site of the plurality of cell sites to be a phantom site;

activating the phantom frequency at the phantom site;

measuring a phantom signal strength at each of a plurality of phantom neighboring cell sites;

recording the signal strengths at the phantom site and each of the plurality of neighboring phantom sites;

redesignating another of the plurality of cell sites to be the phantom site;

repeating the activating, measuring, recording and redesignating steps until each of the plurality of cell sites has been designated as the phantom site in turn; and

compiling an interference mapping matrix as between the recorded signal strengths of each of the plurality cell sites and the phantom site.