Self-optimizing distributed antenna system using soft frequency reuse

Patent metadata

Field	Value
Publication number	US-9363768-B2
Application number	US-201313935157-A
Country	US
Kind code	B2
Filing date	Jul 3, 2013
Priority date	Jul 9, 2012
Publication date	Jun 7, 2016
Grant date	Jun 7, 2016

Abstract

A method of determining a carrier power in a communications system including a processor includes a) setting a power differential between a reference carrier and one or more carriers, b) measuring a number of satisfied users at the power differential, and c) measuring a capacity for the satisfied users at the power differential. The method also includes d) increasing the power differential by a predetermined amount and e) determining, using the processor, that the number of satisfied users at the increased power differential is greater than or equal to the number of satisfied users at the power differential. The method further includes f) repeating a)-c) and g) setting the carrier power at an iterated power level.

First claim

What is claimed is:

1. A method of allocating transmission power in a communications system including a processor, the method comprising:
a) setting a power differential for an antenna in a cell of the communication system, the power differential being a difference between a transmission power of one or more carriers and a transmission power of a reference carrier;
b) measuring a percentage of satisfied users at the power differential, wherein a satisfied user is defined as a user having a capacity above a predetermined threshold capacity;
c) measuring a total capacity for the satisfied users at the power differential;
d) adjusting the power differential by a predetermined amount by increasing or decreasing the transmission power of the one or more carriers;
e) measuring an updated percentage of satisfied users at the adjusted power differential;
f) determining, using the processor, that the updated percentage of satisfied users is greater than or equal to the percentage of satisfied users at the power differential; and
g) repeating a)-f) to obtain an iterated power level; and
h) setting the transmission power of the one or more carriers at the iterated power level.

2. The method of claim 1 wherein the reference carrier comprises a first frequency carrier, and the one or more carriers comprise a second frequency carrier and a third frequency carrier.

3. The method of claim 1 wherein the reference carrier is utilized by multiple antennas in the cell of the communications system and the one or more carriers are utilized by a single antenna in the cell of the communications system.

4. The method of claim 1 wherein the predetermined threshold capacity is defined by a predetermined threshold bit rate.

5. The method of claim 1 further comprising:
determining that the adjusted power differential is outside a predetermined range; and
terminating the method.

6. The method of claim 1 further comprising:
determining that an oscillation indicator is equal to a predetermined value; and
terminating the method.

7. The method of claim 1 further comprising measuring an updated total capacity for the satisfied users at the adjusted power differential, and determining, using the processor, that the updated total capacity for the satisfied users at the adjusted power differential is less than the total capacity for the satisfied users at the power differential.

8. The method of claim 3 wherein the single antenna is the antenna, and the antenna is at a center of the cell.

9. The method of claim 8 wherein the multiple antennas are at an edge of the cell.

10. The method of claim 9 wherein the multiple antennas comprise six antennas.

Assignees

• Dali Systems Co Ltd

Inventors

• Hejazi Seyed Amin
• Stapleton Shawn Patrick

Classifications

• H04L5/0073

  Allocation arrangements that take into account other cell interferences · CPC title

• H04W72/0473

  the resource being transmission power · CPC title

• H04L5/0023

  Time-frequency-space · CPC title

• H04W52/346

  distributing total power among users or channels · CPC title

• H04W52/243 Primary

  taking into account interferences · CPC title