Three dimensional cellular communication system with coordinate offset and frequency reuse

• US 5,093,925 A
• Filed: 04/25/1990
• Issued: 03/03/1992
• Est. Priority Date: 04/25/1990
• Status: Expired due to Term

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Chanroo, Keith A.
• Primary Examiner(s): Eisenzopf, Reinhard J.
• Assistant Examiner(s): Charouel, Lisa
• Application Number:
  US07/514,465
• Time in Patent Office: 678 Days
• Field of Search: 455/33, 455/34, 455/50, 455/56, 455/63, 455/66, 379/58, 379/59, 379/60, 379/61, 379/62, 379/63
• US Class Current: 455/447
• CPC Class Codes: H04W 16/02 Resource partitioning among network components, e.g. reuse partitioning
• CPC Class Codes: H04W 16/12 Fixed resource partitioning

Abstract

A three dimensional cellular communication system comprising a plurality of cells arranged in a multi-level environment to reduce interference and improve frequency reuse in both horizontal and vertical directions by offsetting cells stacked on different levels of the multi-level environment.

Claims

1. A three dimensional cellular communication system comprising:

a first planar level having a first plurality of cells; and

a second planar level having a second plurality of cells similarly arranged as the first plurality of cells and having an offset in first, second and third co-ordinates from the first plurality of cells, wherein the first and second plurality of cells have a multiple of predetermined clusters having a predetermined number of cells, each of the multiple of predetermined clusters having a cluster size determining the offset in the first and the second co-ordinates, and wherein the offset in the third co-ordinate is determined by a vertical distance between the first planar level and the second planar level.

2. The three dimensional cellular communication system according to claim 1 wherein the offset in the first, second, and third co-ordinates is further determined in accordance with an improved frequency reuse for each cells of the first and second plurality of cells.

3. The three dimensional cellular communication system according to claim 1 wherein the offset in the first, second, and third co-ordinates is further determined in accordance with a reduced signal interference between each cells of the first and second plurality of cells.

4. In a structure having at least first and second levels, a three dimensional cellular communication system comprising:

a first plurality of cells on the first planar level; and

a second plurality of cells on the second planar level similarly arranged as the first plurality of cells and having an offset in first, second and third co-ordinates from the first plurality of cells, wherein the first and second plurality of cells have a multiple of predetermined clusters having a predetermined number of cells, each of the multiple of predetermined clusters having a cluster size determining the offset in the first and the second co-ordinates, and wherein the offset in the third co-ordinate is determined by a vertical distance between the first planar level and the second planar level.

5. The structure according to claim 4 wherein the offset in the first, second, and third co-ordinates is further determined in accordance with an improved frequency reuse for each cells of the first and second plurality of cells.

6. The structure according to claim 4 wherein the offset in the first, second, and third co-ordinates of the first plurality of cells from the second plurality of cells is further determined in accordance with a reduced signal interference therebetween.

7. A three dimensional cellular radio system comprising:

a first plurality of communicators, each providing a communication area defining one of a first plurality of cells in a first, second, and third dimensions, the first plurality of communicators for communicating by a first signal on a first planar level; and

a second plurality of communicators, each providing a communication area defining one of a second plurality of cells in a first, second, and third dimensions, the second plurality of communicators for communicating by a second signal on a second planar level, the first plurality of communicators being offset in first, second and third co-ordinates from the second plurality of communicators for minimizing the interference therebetween, wherein the first and second plurality of cells have a multiple of predetermined clusters having a predetermined number of cells, each of the multiple of predetermined clusters having a cluster size with first and second co-ordinates determining the offset in the first and the second dimensions, and wherein the offset in the third dimension is determined by a vertical distance between the first planar level and the second planar level.

8. The three dimensional cellular radio system according to claim 7 wherein the first and second signals comprise substantially the same frequency.

9. The three dimensional cellular radio system according to claim 7 wherein the three dimensional cellular radio system comprises a cellular telephone system and the first and second plurality of communicators comprise transceivers.

10. The three dimensional cellular radio system according to claim 7 wherein the first plurality of cells are contiguous to one another and the second plurality of cells are contiguous to one another.

11. The three dimensional cellular radio system according to claim 7 wherein the first plurality of cells are contiguous to the second plurality of cells.

12. A method comprising:

communicating by a first signal, having a frequency, from a first plurality of communicators in first, second, and third dimensions; and

communicating by a second signal, having substantially the same frequency, from a second plurality of communicators in the first, second, and third dimensions, wherein the first plurality of communicators is offset in first, second and third co-ordinates from the second plurality of communicators for maximizing frequency reuse in the first, second, and third dimensions, wherein the first and second plurality of communicators have a communication area defined by one of a first and second plurality of cells, wherein the first and second plurality of cells have a multiple of predetermined clusters having a predetermined number of cells, each of the multiple of predetermined clusters having a cluster size with first and second co-ordinates determining the offset in the first and the second dimensions, and wherein the offset in the third dimension is determined by a vertical distance between the first and second plurality of communicators.

13. The method according to claim 12 wherein both communicating steps comprise communicating by the first and second signals having substantially the same frequency.

14. The method according to claim 12 wherein the first communicating step comprises communicating on a first level of a structure and the second communicating step comprises communicating on a second level of the structure.