Method and a device for path profile generation

• US 6,047,238 A
• Filed: 03/03/1998
• Issued: 04/04/2000
• Est. Priority Date: 03/14/1997
• Status: Expired due to Fees

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Olofsson, Per
• Primary Examiner(s): McElheny, Jr., Donald E.
• Application Number:
  US09/033,672
• Time in Patent Office: 763 Days
• Field of Search: 702/2, 702/3, 702/5, 455/446
• US Class Current: 702/2
• CPC Class Codes: H04B 17/3911 Fading models or fading generators
• CPC Class Codes: H04W 16/18 Network planning tools
• CPC Class Codes: H04W 16/20 for indoor coverage or short range network deployment

Abstract

In a method and a device for generation of path profiles for use in radio wave propagation planning, several path profiles, adjacent to a generated first, primary path (501) are generated (503). Obstacles detected in the adjacent path profiles are then transformed and translated (505) onto the primary path profile, whereby a resulting path profile taking into account both obstacles present in the primary path profile and obstacles close to it. The method and the device are particularly useful in urban and suburban areas where obstacles tend to be of a discrete nature, and can be used for many types of applications such as point-to-point, point-to-multipoint and area coverage applications.

Claims

1. A method of generating a path profile for radio wave propagation, comprising the steps of:

generating a first, primary path profile;

generating at least a second, adjacent, path profile at a distance from the primary path profile;

transforming and/or translating the at least second path profile onto the primary path profile, thereby forming a resulting path profile from the first path profile at the at least second path profile; and

outputting the resulting path profile as the generated path profile.

2. A method according to claim 1, characterised in that several, adjacent, path profiles are generated at distances corresponding to a raster resolution used.

3. A method according to claim 1, characterised in that the adjacent path profile generated at the longest distance from the primary path profile is generated at a distance essentially corresponding to the radius of the first Fresnel zone at the mid-point thereof.

7. A method according to claim 2, characterised in that the adjacent path profile generated at the longest distance from the primary path profile is generated at a distance essentially corresponding to the radius of the first Fresnel zone at the mid-point thereof.

4. A device for generating a path profile for radio wave propagation, comprising:

means for generating a primary path profile;

means for generating at least a second, adjacent, path profile at a distance from the primary path profile;

means for transforming and/or translating the at least second path profile onto the primary path profile, thereby forming a resulting path profile from the first path profile at the at least second path profile; and

means for outputting the resulting path profile as the generated path profile.

5. A device according to claim 4, characterised by

means for generating several, adjacent, path profiles at distances corresponding to a raster resolution used.

6. A device according to claim 4, characterised by

means for generating the adjacent path profile, located at the longest distance from the primary path profile, at a distance essentially corresponding to the radius of the first Fresnel zone at the mid-point thereof.

8. A device according to claim 5, characterised by

means for generating the adjacent path profile, located at the longest distance from the primary path profile, at a distance essentially corresponding to the radius of the first Fresnel zone at the mid-point thereof.

9. A computer program product comprising computer readable coded instructions stored in a memory, the computer readable coded instructions being executable on a processor to which information is input via a user input device;

the computer program performing upon execution the steps of;

generating a first, primary path profile;

generating at least a second, adjacent, path profile at a distance from the primary path profile;

transforming and/or translating the at least second path profile onto the primary path profile, thereby forming a resulting path profile from the first path profile at the at least second path profile; and

outputting the resulting path profile as the generated path profile.

10. The computer program product of claim 9, wherein upon execution the computer program performs the further step of generating several adjacent path profiles at distances corresponding to a used raster resolution.

11. The computer program product of claim 9, wherein the computer program generates a longest distanced adjacent path profile from the primary path profile at a distance essentially corresponding to a radius of the first Fresnel zone at the mid-point thereof.