Selecting cells for downlink inter-cell interference coordination

• US 9,848,389 B2
• Filed: 08/03/2015
• Issued: 12/19/2017
• Est. Priority Date: 08/03/2015
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: Nabar, Rohit Umesh, Madan, Ritesh K.
• Primary Examiner(s): Elpenord, Candal
• Application Number:
  US14/816,957
• Publication Number:
  US 20170041938A1
• Time in Patent Office: 869 Days
• Field of Search: None
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning
• CPC Class Codes: H04W 52/04 TPC
• CPC Class Codes: H04W 52/143 Downlink power control
• CPC Class Codes: H04W 52/225 Calculation of statistics, e.g. average, variance
• CPC Class Codes: H04W 52/244 Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
• CPC Class Codes: H04W 52/247 where the output power of a terminal is based on a path parameter sent by another terminal
• CPC Class Codes: H04W 72/0453 Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

An example method is provided in one example embodiment and includes receiving a first message indicative of whether a first cell is non-interfering to at least one neighboring cell, determining whether the first cell is non-interfering to the at least one neighboring cell based upon the first message, and responsive to a determination that the first cell is not non-interfering to the at least one neighboring cells, reducing a power level of one or more downlink resources of a fractional frequency reuse portion of a frequency spectrum associated with the first cell.

Claims

1. A method, comprising:

receiving a first message indicative of whether a first cell is non-interfering to at least one neighboring cell;

determining whether the first cell is non-interfering to the at least one neighboring cell based upon the first message; and

responsive to a determination that the first cell is not non-interfering to the at least one neighboring cells, reducing a power level of one or more downlink resources of a fractional frequency reuse portion of a frequency spectrum associated with the first cell;

wherein the first message is indicative of that the first cell is non-interfering to the at least one neighboring cell and includes all zero bit values for fractional frequency reuse resource blocks indicated within the first message.

2. The method of claim 1, further comprising:

responsive to the determination that the first cell is non-interfering to the at least one neighboring cell, maintaining a current power level on the one or more downlink resources of the fractional frequency reuse portion of the frequency spectrum associated with the first cell.

3. The method of claim 1, wherein the first message is a relative narrow-band transmit power (RNTP) message.

4. The method of claim 1, further comprising:

determining whether the first cell is non-interfered by the at least one neighboring cell; and

sending a second message to the at least one neighboring cell indicative of whether the first cell is non-interfered by the at least one neighboring cell.

5. The method of claim 4, wherein the second message is a relative narrow-band transmit power (RNTP) message.

6. The method of claim 4, further comprising:

responsive to the determination that the first cell is non-interfered by the at least one neighboring cell, sending the second message to the at least one neighboring cell indicative that the first cell is non-interfered by the at least one neighboring cell.

7. The method of claim 6, wherein the second message indicative that the first cell is non-interfering to the at least one neighboring cell includes all zero bit values for fractional frequency reuse resource blocks indicated within the second message.

8. The method of claim 4, further comprising:

responsive to the determination that the first cell is interfered by the at least one neighboring cell, sending the second message to the at least one neighboring cell indicative that the first cell is interfered by the at least one neighboring cell.

9. The method of claim 8, wherein, responsive to the reception of the second message, the at least one neighboring cell is configured to reduce a power level of one or more downlink resources of a fractional frequency reuse portion of a frequency spectrum associated with the at least one neighboring cell.

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

receiving a first message indicative of whether a first cell is non-interfering to at least one neighboring cell;

determining whether the first cell is non-interfering to the at least one neighboring cell based upon the first message; and

responsive to a determination that the first cell is not non-interfering to the at least one neighboring cells, reducing a power level of one or more downlink resources of a fractional frequency reuse portion of a frequency spectrum associated with the first cell;

wherein the first message is indicative of that the first cell is non-interfering to the at least one neighboring cell and includes all zero bit values for fractional frequency reuse resource blocks indicated within the first message.

11. The media of claim 10, wherein the operations further comprise:

responsive to the determination that the first cell is non-interfering to the at least one neighboring cell, maintaining a current power level on the one or more downlink resources of the fractional frequency reuse portion of the frequency spectrum associated with the first cell.

12. The media of claim 10, wherein the operations further comprise:

determining whether the first cell is non-interfered by the at least one neighboring cell; and

sending a second message to the at least one neighboring cell indicative of whether the first cell is non-interfered by the at least one neighboring cell.

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

responsive to the determination that the first cell is non-interfered by the at least one neighboring cell, sending the second message to the at least one neighboring cell indicative that the first cell is non-interfered by the at least one neighboring cell.

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

responsive to the determination that the first cell is interfered by the at least one neighboring cell, sending the second message to the at least one neighboring cell indicative that the first cell is interfered by the at least one neighboring cell.

15. The method of claim 14, wherein, responsive to the reception of the second message, the at least one neighboring cell is configured to reduce a power level of one or more downlink resources of a fractional frequency reuse portion of a frequency spectrum associated with the at least one neighboring cell.

16. 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 a first message indicative of whether a first cell is non-interfering to at least one neighboring cell;

determine whether the first cell is non-interfering to the at least one neighboring cell based upon the first message; and

responsive to a determination that the first cell is not non-interfering to the at least one neighboring cells, reduce a power level of one or more downlink resources of a fractional frequency reuse portion of a frequency spectrum associated with the first cell;

wherein the first message is also indicative of the first cell is non-interfering to the at least one neighboring cell and includes all zero bit values for fractional frequency reuse resource blocks indicated within the first message.

17. The apparatus of claim 16, wherein the at least one module is further configured to:

responsive to the determination that the first cell is non-interfering to the at least one neighboring cell, maintain a current power level on the one or more downlink resources of the fractional frequency reuse portion of the frequency spectrum associated with the first cell.

18. The apparatus of claim 16, wherein the at least one module is further configured to:

determine whether the first cell is non-interfered by the at least one neighboring cell; and

send a second message to the at least one neighboring cell indicative of whether the first cell is non-interfered by the at least one neighboring cell.

19. The apparatus of claim 16, wherein the at least one module is further configured to:

responsive to the determination that the first cell is non-interfered by the at least one neighboring cell, send the second message to the at least one neighboring cell indicative that the first cell is non-interfered by the at least one neighboring cell.