Resource adaptation for frequency domain downlink inter-cell interference coordination

• US 10,154,415 B2
• Filed: 08/04/2015
• Issued: 12/11/2018
• Est. Priority Date: 08/04/2015
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Madan, Ritesh K., Nabar, Rohit Umesh, Chandrasekhar, Vikram, Shirali, Kedar Durgadas
• Primary Examiner(s): Hoang, Thai D
• Application Number:
  US14/818,084
• Publication Number:
  US 20170041939A1
• Time in Patent Office: 1,225 Days
• Field of Search: 370328-330, 370341-349
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning

Abstract

An example method is provided in one example embodiment and includes receiving at least one performance metric from each of a plurality of cells, the at least performance metric associated with a downlink transmission from the cell to one or more user equipment devices associated with the cell. The method further includes determining a fraction of resources for allocation within a fractional frequency reuse portion of a frequency spectrum based upon the received at least one performance metric, and determining a fraction of the resources for allocation within a reuse one portion of the frequency spectrum based upon the determined fraction of resources for allocation within the fractional frequency reuse portion of the frequency spectrum.

Claims

1. A method, comprising:

receiving, at a server that is communicatively coupled with a plurality of cells, a plurality of performance metrics from the plurality of cells, the plurality of performance metrics comprising;

a first performance metric representing an overall throughput performance of all user equipment devices associated with a first cell of the plurality of cells, when the first cell is potentially allocated a first resource allocation value for a fractional frequency reuse portion of the first cell'"'"'s frequency spectrum; and

a second performance metric representing an overall throughput performance of all user equipment devices associated with the first cell when the first cell is potentially allocated a second resource allocation value, different from the first resource allocation value, for the fractional frequency reuse portion of the first cell'"'"'s frequency spectrum;

determining, at the server, a fraction of resources for allocation within the fractional frequency reuse portion of the frequency spectrum for each of the plurality of cells, based upon the received first and second performance metrics, wherein the plurality of cells includes the first cell and a second cell and wherein the first cell does not neighbor the second cell;

determining, for each of the plurality of cells, a fraction of the resources for allocation within a reuse one portion of the frequency spectrum based upon the determined fraction of resources for allocation within the fractional frequency reuse portion of the frequency spectrum for the respective cell; and

transmitting, from the server to each of the plurality of cells, the fraction of resources for allocation within the fractional frequency reuse portion of the frequency spectrum for the respective cell.

2. The method of claim 1 further comprising:

transmitting, from the server, resource allocation parameters including an indication of the fraction of resources for allocation within the reuse one portion of the frequency spectrum to each of the plurality of cells.

3. The method of claim 1, wherein determining the fraction of resources for allocation within the fractional frequency reuse portion of the spectrum includes maximizing a sum of utilities across the plurality of cells.

4. The method of claim 3, wherein maximizing the sum of utilities includes solving a utility maximization resource allocation function across the plurality of cells to determine the fraction of resources for allocation within the fractional frequency reuse portion of a frequency spectrum and the fraction of the resources for allocation within the reuse one portion of the frequency spectrum.

5. The method of claim 1, wherein the performance metric includes at least one of a spectral efficiency and average modulation and coding scheme (MCS) for each user equipment device associated with a cell.

6. The method of claim 5, wherein determining the fraction of resources for allocation within the fractional frequency reuse portion of the frequency spectrum includes solving a utility maximization resource allocation function across the plurality of cells using at least one of the spectral efficiency and average modulation and coding scheme (MCS).

7. The method of claim 1, wherein the performance metric includes an effective rate computed by the particular cell based upon performance metrics received from each user equipment device associated with the cell.

8. The method of claim 1, wherein the performance metric includes a number of user equipment devices served by the particular cell that have a performance measure metric in the reuse one portion of the frequency spectrum below a target threshold value, and a total number of user equipment devices served by the particular cell.

9. The method of claim 8, wherein determining the fraction of resources for allocation within the fractional frequency reuse portion of the frequency spectrum includes adapting the fraction of resources such that a predefined percentile of downlink transmission to the UEs occur at a predefined performance metric threshold.

10. The method of claim 8, wherein the performance measure metric includes at least one of a signal-to-interference-plus-noise ratio (SINR) and average modulation and coding scheme (MCS).

11. One or more non-transitory tangible media that includes code for execution and when executed by a processor operable to perform operations comprising:

receiving, at a server that is communicatively coupled with a plurality of cells, a plurality of performance metrics from the plurality of cells, the plurality of performance metrics comprising;

a first performance metric representing an overall throughput performance of all user equipment devices associated with a first cell of the plurality of cells, when the first cell is potentially allocated a first resource allocation value for a fractional frequency reuse portion of the first cell'"'"'s frequency spectrum; and

a second performance metric representing an overall throughput performance of all user equipment devices associated with the first cell when the first cell is potentially allocated a second resource allocation value, different from the first resource allocation value, for the fractional frequency reuse portion of the first cell'"'"'s frequency spectrum;

determining, at the server, a fraction of resources for allocation within the fractional frequency reuse portion of the frequency spectrum for each of the plurality of cells, based upon the received first and second performance metrics, wherein the plurality of cells includes the first cell and a second cell and wherein the first cell does not neighbor the second cell;

determining, for each of the plurality of cells, a fraction of the resources for allocation within a reuse one portion of the frequency spectrum based upon the determined fraction of resources for allocation within the fractional frequency reuse portion of the frequency spectrum for the respective cell; and

transmitting, from the server to each of the plurality of cells, the fraction of resources for allocation within the fractional frequency reuse portion of the frequency spectrum for the respective cell.

12. The media of claim 11, wherein the operations further comprise:

transmitting, from the server, resource allocation parameters including an indication of the fraction of resources for allocation within the reuse one portion of the frequency spectrum to each of the plurality of cells.

13. The media of claim 11, wherein determining the fraction of resources for allocation within the fractional frequency reuse portion of the spectrum includes maximizing a sum of utilities across the plurality of cells.

14. The media of claim 13, wherein maximizing the sum of utilities includes solving a utility maximization resource allocation function across the plurality of cells to determine the fraction of resources for allocation within the fractional frequency reuse portion of a frequency spectrum and the fraction of the resources for allocation within the reuse one portion of the frequency spectrum.

15. The media of claim 11, wherein the performance metric includes at least one of a spectral efficiency and average modulation and coding scheme (MCS) for each user equipment device associated with a cell.

16. The media of claim 11, wherein the performance metric includes an effective rate computed by the particular cell based upon performance metrics received from each user equipment device associated with the cell.

17. An apparatus, comprising:

a memory element configured to store data,

a processor operable to execute instructions associated with the data, and

at least one module being configured to;

receive, at a server that is communicatively coupled with a plurality of cells, a plurality of performance metrics from the plurality of cells, the plurality of performance metrics comprising;

a first performance metric representing an overall throughput performance of all user equipment devices associated with a first cell of the plurality of cells, when the first cell is potentially allocated a first resource allocation value for a fractional frequency reuse portion of the first cell'"'"'s frequency spectrum; and

a second performance metric representing an overall throughput performance of all user equipment devices associated with the first cell when the first cell is potentially allocated a second resource allocation value, different from the first resource allocation value, for the fractional frequency reuse portion of the first cell'"'"'s frequency spectrum;

determine, at the server, a fraction of resources for allocation within the fractional frequency reuse portion of the frequency spectrum for each of the plurality of cells, based upon the received first and second performance metrics, wherein the plurality of cells includes the first cell and a second cell and wherein the first cell does not neighbor the second cell;

determine a fraction of the resources for allocation within a reuse one portion of the frequency spectrum based upon the determined fraction of resources for allocation within the fractional frequency reuse portion of the frequency spectrum; and

transmit, from the server to each of the plurality of cells, the fraction of resources for allocation within the fractional frequency reuse portion of the frequency spectrum for the respective cell.

18. The apparatus of claim 17, wherein the at least one module is further configured to:

transmit, from the server, resource allocation parameters including an indication of the fraction of resources for allocation within the reuse one portion of the frequency spectrum to each of the plurality of cells.