Detection and mitigation of ingress interference within communication links

Patent metadata

Field	Value
Publication number	US-9843401-B2
Application number	US-201715397129-A
Country	US
Kind code	B2
Filing date	Jan 3, 2017
Priority date	Jun 4, 2012
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

A system and process that incorporates teachings of the subject disclosure may include, for example, an interference monitor configured to detect occurrences of unintended signals within a communications link. A communications link may carry a down-converted format of a satellite signal from an earth terminal to an integrated receiver and decoder for further network distribution. Depending upon the nature of any such detected unintended signals, the communications link can be “swapped out” for a redundant communications link carrying a down-converted format of the same satellite signal obtained by way of a redundant earth terminal. Other embodiments are disclosed.

First claim

What is claimed is:

1. A device, comprising:
a processing system including a processor; and
a memory that stores executable instructions that, when executed by the processing system, facilitate performance of operations, comprising:
monitoring an intermediate frequency bandwidth occupied by a down-converted satellite signal over a first time interval and a second time interval, wherein a first signal energy within the intermediate frequency bandwidth is determined over the first time interval, and wherein a second signal energy within the intermediate frequency bandwidth is determined over the second time interval;
detecting interference within the intermediate frequency bandwidth in response to determining the second signal energy is greater than the first signal energy;
identifying an alarm condition based on the interference; and
substituting the down-converted satellite signal with a redundant down-converted satellite signal according to the alarm condition.

2. The device of claim 1 , wherein the detecting the interference comprises:
identifying an interference signal within the intermediate frequency bandwidth; and
determining that an absolute amplitude of the interference signal is above a threshold.

3. The device of claim 1 , wherein the detecting the interference comprises:
identifying an interference signal within the intermediate frequency bandwidth; and
determining a relative amplitude of the interference signal compared to the down-converted satellite signal exceeds a threshold.

4. The device of claim 1 , wherein the detecting the interference comprises:
identifying an interference signal within the intermediate frequency bandwidth; and
determining a relative amplitude of the interference signal compared to a noise level exceeds a threshold.

5. The device of claim 1 , wherein the detecting the interference comprises:
identifying an interference signal within the intermediate frequency bandwidth; and
determining an attribute of the interference signal.

6. The device of claim 5 , wherein the identifying the alarm condition comprises identifying the alarm condition based on the attribute.

7. The device of claim 5 , wherein the attribute is one of spectral energy, bandwidth, signal strength, a signal to noise ratio.

8. The device of claim 1 , wherein the alarm condition is indicated as one of minor, major, and critical.

9. A machine readable storage medium, comprising executable instructions that, when executed by a processing system including a processor, facilitate performance of operations, comprising:
monitoring an intermediate frequency bandwidth occupied by a down-converted satellite signal over a first time period and a second time period, wherein a first signal energy within the intermediate frequency bandwidth is determined over the first time period, and wherein a second signal energy within the intermediate frequency bandwidth is determined over the second time period;
identifying an interference signal within the intermediate frequency bandwidth in response to determining the second signal energy is greater than the first signal energy;
determining an alarm condition according to the interference signal; and
substituting the down-converted satellite signal with a redundant down-converted satellite signal according to the alarm condition.

10. The machine readable storage medium of claim 9 , wherein the identifying the interference signal comprises determining that an absolute amplitude of the interference signal is above a threshold.

11. The machine readable storage medium of claim 9 , wherein the identifying the interference signal comprises determining a relative amplitude of the interference signal compared to the down-converted satellite signal exceeds a threshold.

12. The machine readable storage medium of claim 9 , wherein the identifying the interference signal comprises determining a relative amplitude of the interference signal compared to a noise level exceeds a threshold.

13. The machine readable storage medium of claim 9 , wherein the identifying the interference signal comprises determining an attribute of the interference signal.

14. The machine readable storage medium of claim 13 , wherein the identifying the alarm condition comprises identifying the alarm condition based on the attribute.

15. A method, comprising:
monitoring, by a processing system including a processor, an intermediate frequency bandwidth occupied by a down-converted satellite signal;
identifying, by the processing system, an interference signal within the intermediate frequency bandwidth in response to determining a first signal energy over a first time interval is greater than a second signal energy over a second time interval;
determining, by the processing system, an alarm condition based on the interference signal; and
substituting, by the processing system, the down-converted satellite signal with a redundant down-converted satellite signal according to the alarm condition.

16. The method of claim 15 , comprising determining, by the processing system, that an absolute amplitude of the interference signal is above a threshold.

17. The method of claim 15 , comprising determining, by the processing system, a relative amplitude of the interference signal compared to the down-converted satellite signal exceeds a threshold.

18. The method of claim 15 , comprising determining, by the processing system, a relative amplitude of the interference signal compared to a noise level exceeds a threshold.

Assignees

• At & T Ip I Lp

Inventors

• Medina Douglas
• Jones Ronald
• Peck Michael

Classifications

• H04W72/30

  Resource management for broadcast services · CPC title

• H04B15/02 Primary

  Reducing interference from electric apparatus by means located at or near the interfering apparatus · CPC title

• H04B7/18582

  Arrangements for data linking, i.e. for data framing, for error recovery, for multiple access · CPC title

• H04B17/336

  Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] · CPC title

• H04B7/18517 Primary

  Transmission equipment in earth stations · CPC title