Method for determining the degree of coverage in a mobile radio system

• US 5,307,510 A
• Filed: 12/24/1992
• Issued: 04/26/1994
• Est. Priority Date: 09/29/1989
• Status: Expired due to Fees

• Current Assignee: Televerket
• Original Assignee: Televerket
• Inventors: Tegth, Ulf, Gunmar, Krister
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): Charouel, Lisa
• Application Number:
  US07/995,552
• Time in Patent Office: 488 Days
• Field of Search: 455/33.1, 455/33.2, 455/33.3, 455/54.1, 455/54.2, 455/56.1, 455/62, 455/67.1, 455/67.3, 455/67.4, 455/67.6, 455/67.7, 455/226.1-226.4, 379/59, 379/60, 379/63
• US Class Current: 455/67.11
• CPC Class Codes: H04W 16/18 Network planning tools
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements

Abstract

The present invention provides a method for checking the degree of coverage in a mobile radio system. According to the method, field strengths are utilized which have been measured from all base stations for all important traffic routes in the mobile radio system. The field strength values are related to geographical coordinates in a respective coverage area and the highest value for each coordinate is stored. The values noted are then compared with a predetermined coverage limit value. With the aid of the method, a graph can be produced using the field strength values stored for each coordinate, the coordinates which are lower or higher than the coverage limit value being marked in the graph.

Claims

1. A method for checking the degree of coverage in a mobile radio system having a plurality of base stations which emit radio signals in associated individual coverage areas and a plurality of mobile stations, said method comprising the steps of:

producing a radio signal at each of said plurality of base stations;

measuring field strengths of the produced radio signals from each of said plurality of base stations along all important traffic routes located within the mobile radio system;

assigning a numerical value to the measured field strength values and relating said measured field strength values to geographical coordinates in the individual coverage areas;

comparing the field strength values from said plurality of base stations for each of said geographical coordinates and determining a highest value of said field strength values and storing said highest value for each of said geographical coordinates;

comparing the highest value stored for each of said geographic coordinates with a predetermined coverage limit value; and

producing a first graphical display image of the field strength values for each of said geographical coordinates of those coordinates which have said stored highest value lower than said predetermined coverage limit value for determining holes in the coverage areas and producing a second graphical display of those coordinates having said stored highest value higher than the predetermined coverage limit value.