Interference management utilizing power and attenuation profiles

• US 9,374,791 B2
• Filed: 09/17/2008
• Issued: 06/21/2016
• Est. Priority Date: 09/21/2007
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Yavuz, Mehmet, Black, Peter J., Nanda, Sanjiv
• Primary Examiner(s): NGUYEN, TUAN HOANG
• Application Number:
  US12/212,612
• Publication Number:
  US 20090086861A1
• Time in Patent Office: 2,834 Days
• Field of Search: 455/13.4, 455/63.1, 455/432.1, 455/574, 370/311, 370/312, 370/332
• US Class Current: 1/1
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/40 during macro-diversity or soft handoff
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

Interference that occurs during wireless communication may be managed through the use of fractional reuse and other techniques. In some aspects fractional reuse may relate to HARQ interlaces, portions of a timeslot, frequency spectrum, and spreading codes. Interference may be managed through the use of a transmit power profile and/or an attenuation profile. Interference also may be managed through the use of power management-related techniques.

Claims

1. A method of communication, comprising:

defining a transmit power profile, wherein the transmit power profile specifies how transmit power is varied over time, and wherein the transmit power profile is periodic;

defining maximum and minimum power levels for the transmit power profile;

defining a time period for the transmit power profile;

sending at least one indication of the transmit power profile to a plurality of access points, wherein at least a portion of the access points are neighboring access points;

specifying different transmit power profile phase offset values for different ones of the neighboring access points to mitigate downlink interference; and

sending the transmit power profile phase offset values to the neighboring access points.

2. The method of claim 1, further comprising:

receiving information relating to downlink interference; and

adapting the maximum and minimum power levels and/or the time period based on the information.

3. The method of claim 2, wherein the information comprises at least one downlink measurement report received from at least one access terminal associated with at least one of the access points.

4. The method of claim 1, further comprising adapting the maximum and minimum power levels and/or the time period based on a quantity of active access terminal associated with the plurality of access points and/or based on downlink data traffic associated with the plurality of access points.

5. An apparatus for communication, comprising:

an interference controller configured to define a transmit power profile, define maximum and minimum power levels for the transmit power profile, and define a time period for the transmit power profile, wherein the transmit power profile specifies how transmit power is varied over time, and wherein the transmit power profile is periodic; and

a communication controller configured to send at least one indication of the transmit power profile to a plurality of access points;

wherein at least a portion of the access points are neighboring access points;

wherein the interference controller is further configured to specify different transmit power profile phase offset values for different ones of the neighboring access points to mitigate downlink interference; and

wherein the communication controller is further configured to send the transmit power profile phase offset values to the neighboring access points.

6. The apparatus of claim 5, wherein:

the communication controller is further configured to receive information relating to downlink interference; and

the interference controller is further configured to adapt the maximum and minimum power levels and/or the time period based on the information.

7. The apparatus of claim 6, wherein the information comprises at least one downlink measurement report received from at least one access terminal associated with at least one of the access points.

8. The apparatus of claim 5, wherein the interference controller is further configured to adapt the maximum and minimum power levels and/or the time period based on a quantity of active access terminal associated with the plurality of access points and/or based on downlink data traffic associated with the plurality of access points.

9. An apparatus for communication, comprising:

means for defining a transmit power profile, maximum and minimum power levels for the transmit power profile, and a time period for the transmit power profile, wherein the transmit power profile specifies how transmit power is varied over time, and wherein the transmit power profile is periodic; and

means for sending at least one indication of the transmit power profile to a plurality of access points;

wherein at least a portion of the access points are neighboring access points;

wherein the means for defining is configured to specify different transmit power profile phase offset values for different ones of the neighboring access points to mitigate downlink interference; and

wherein the means for sending is configured to send the transmit power profile phase offset values to the neighboring access points.

10. The apparatus of claim 9, wherein:

the means for sending is configured to receive information relating to downlink interference; and

the means for defining is configured to adapt the maximum and minimum power levels and/or the time period based on the information.

11. The apparatus of claim 10, wherein the information comprises at least one downlink measurement report received from at least one access terminal associated with at least one of the access points.

12. The apparatus of claim 9, wherein the means for defining is configured to adapt the maximum and minimum power levels and/or the time period based on a quantity of active access terminal associated with the plurality of access points and/or based on downlink data traffic associated with the plurality of access points.

13. A computer-program product, comprising:

a non-transitory computer-readable medium comprising codes for causing a computer to;

define a transmit power profile, wherein the transmit power profile specifies how transmit power is varied over time, and wherein the transmit power profile is periodic

define maximum and minimum power levels for the transmit power profile;

define a time period for the transmit power profile; and

send at least one indication of the transmit power profile to a plurality of access points, wherein at least a portion of the access points are neighboring access points;

specify different transmit power profile phase offset values for different ones of the neighboring access points to mitigate downlink interference; and

send the transmit power profile phase offset values to the neighboring access points.

14. The computer-program product of claim 13, further comprising codes for causing the computer to:

receive information relating to downlink interference; and

adapt the maximum and minimum power levels and/or the time period based on the information.