Detection of radio frequency interference in wireless communication systems

• US 7,801,487 B2
• Filed: 12/29/2005
• Issued: 09/21/2010
• Est. Priority Date: 12/29/2005
• Status: Active Grant

• Current Assignee: Ericsson Evdo, Inc. (CommScope Holding Company, Inc.)
• Original Assignee: Airvana Incorporated (CommScope Holding Company, Inc.)
• Inventors: Humblet, Pierre A., Mehrabanzad, Sepehr, Ananthaiyer, Satish
• Primary Examiner(s): Dao; Minh D
• Application Number:
  US11/321,903
• Publication Number:
  US 20070155329A1
• Time in Patent Office: 1,727 Days
• Field of Search: 455/63.11, 455/114.2, 455/522, 455/278.1, 455/296, 455/13.4, 455/127.1, 455/67.11, 370/328, 370/252
• US Class Current: 455/63.1
• CPC Class Codes: H04B 7/18506 Communications with or from aircraft, i.e. aeronautical mobile service

Abstract

A device causes at least one access terminal that is configured to transmit data to a radio node in a sector of a radio access network to alter transmission. While transmission is altered, the device determines a power of a signal received at the radio node, and updates an average value of signal power using the power measured. A device receives, from one or more access terminals that are configured to receive data from a radio node in a sector of a radio access network, a requested rate at which information should be transmitted to each access terminal, receives from the access terminals information about quality of signals received from the radio node, and generates an event if the requested rate and the information about quality of signals fail to satisfy a condition. An access terminal, located in the vicinity of a first radio node configured to transmit data in a sector of a radio access network, measures signal power of pilot signals received by the access terminal.

Claims

1. A method comprising:

causing at least one access terminal that is configured to transmit data to a radio node in a sector of a radio access network to alter transmission;

while transmission is altered, determining a measured power of a signal received at the radio node;

updating an average value of signal power using the measured power; and

generating an alarm on a management system of a network operator of the radio access network based at least in part on the updated average value.

2. The method of claim 1 wherein the alarm is generated based at least in part on the relationship between the updated average value and a threshold value.

3. The method of claim 2 wherein the threshold value comprises a sum of a configurable value and a value that is a floor of a noise level.

4. The method of claim 3 wherein the value that is the floor of the noise level is based on parameters associated with operation of the radio node.

5. The method of claim 1, wherein the alarm informs the network operator that interference is present in one or more sectors of the radio access network.

6. The method of claim 5, wherein the transmission is altered for a predefined period of time each time it is altered.

7. The method of claim 5, wherein the average value comprises an average of measured powers measured during previous intervals.

8. The method of claim 1, wherein the transmission is altered at intervals.

9. The method of claim 1, wherein the transmission is altered by stopping the transmission.

10. A memory comprising instructions that are executable by one or more network devices of a radio access network to:

cause access terminals configured to transmit data to a radio node in a sector of a radio access network to alter transmission;

while transmission is altered, determine a measured power of a signal received at the radio node;

update an average value of signal power using the measured power; and

generate an alarm on a management system of a network operator of the radio access network based at least in part on the updated average value.

11. The memory of claim 10, wherein the alarm is generated based at least in part on a relationship between the updated average value and a threshold value.

12. The memory of claim 11, wherein the threshold value comprises a sum of a configurable value and a value that is a floor of a noise level.

13. The memory of claim 12, wherein the value that is the floor of the noise level is based on parameters associated with operation of the radio node.

14. The memory of claim 10, wherein the alarm informs a network operator that interference is present in one or more sectors of the radio access network.

15. The memory of claim 10, wherein the transmission is altered at intervals.

16. The memory of claim 15, wherein the average value comprises an average of measured powers measured during previous intervals.

17. The memory of claim 10, wherein the transmission is altered by stopping transmission.

18. The memory of claim 10, wherein the transmission is altered for a predefined period of time each time it is altered.