METHOD AND APPARTUS FOR SIGNAL INTERFERENCE PROCESSING

• US 20140269374A1
• Filed: 05/24/2013
• Published: 09/18/2014
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: ISCO International Inc.
• Original Assignee: ISCO International Inc.
• Inventors: Abdelmonem, Amr, Galeev, Mikhail, Cordone, Sean S., Wang, Zhigang, Wong, Howard, Seoane, Jorge
• Granted Patent: US 9,319,916 B2
• Time in Patent Office: Days
• US Class Current: 370/252
• CPC Class Codes: H04B 1/1036 with automatic suppression of narrow band noise or interference, e.g. by using tuneable notch filters H04B1/123 takes precedence; filter circuits H03H
• CPC Class Codes: H04B 1/709 Correlator structure
• CPC Class Codes: H04B 1/71 the interference being narrowband interference
• CPC Class Codes: H04B 1/7103 the interference being multiple access interference
• CPC Class Codes: H04B 15/00 Suppression or limitation of noise or interference by means associated with receiver H04B1/10
• CPC Class Codes: H04B 17/00 Monitoring; Testing of line transmission systems H04B3/46; arrangements for monitoring or testing transmission systems employing electromagnetic waves other than radio waves H04B10/07
• CPC Class Codes: H04B 17/21 for calibration; for correcting measurements
• CPC Class Codes: H04B 17/26 using historical data, averaging values or statistics
• CPC Class Codes: H04B 17/318 Received signal strength
• CPC Class Codes: H04B 17/327 Received signal code power [RSCP]
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04B 17/373 Predicting channel quality or other radio frequency [RF] parameters
• CPC Class Codes: H04B 2201/709709 Methods of preventing interference
• CPC Class Codes: H04B 2201/709745 Iterative interference mitigation schemes
• CPC Class Codes: H04B 7/2634 for channel frequency control
• CPC Class Codes: H04J 11/0066 of narrowband interference narrowband interference reduction H04B1/1036
• CPC Class Codes: H04L 41/069 using logs of notifications; Post-processing of notifications
• CPC Class Codes: H04L 5/0007 the frequencies being orthogonal, e.g. OFDM(A), DMT
• CPC Class Codes: H04L 5/0026 Division using four or more dimensions
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/006 : Quality of the received signal, e.g. BER, SNR, water filling
• CPC Class Codes: H04L 5/0073 : Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 16/28 : using beam steering
• CPC Class Codes: H04W 24/02 : Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/08 : Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 24/10 : Scheduling measurement reports ; Arrangements for measurement reports
• CPC Class Codes: H04W 28/0236 : radio quality, e.g. interference, losses or delay
• CPC Class Codes: H04W 28/04 : Error control
• CPC Class Codes: H04W 4/02 : Services making use of location information
• CPC Class Codes: H04W 4/023 : using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
• CPC Class Codes: H04W 4/029 : Location-based management or tracking services
• CPC Class Codes: H04W 40/16 : based on interference
• CPC Class Codes: H04W 52/04 : TPC
• CPC Class Codes: H04W 52/14 : Separate analysis of uplink or downlink
• CPC Class Codes: H04W 52/243 : taking into account interferences
• CPC Class Codes: H04W 64/00 : Locating users or terminals or network equipment for network management purposes, e.g. mobility management
• CPC Class Codes: H04W 64/006 : with additional information processing, e.g. for direction or speed determination
• CPC Class Codes: H04W 72/0446 : Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/0453 : Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/52 : based on load
• CPC Class Codes: H04W 72/54 : based on quality criteria
• CPC Class Codes: H04W 72/541 : using the level of interference
• CPC Class Codes: H04W 72/542 : using measured or perceived quality

Abstract

A system that incorporates the subject disclosure may include, for example, a method for measuring a power level in at least a portion of a plurality of resource blocks occurring in a radio frequency spectrum, wherein the measuring occurs for a plurality of time cycles to generate a plurality of power level measurements, calculating a baseline power level according to at least a portion of the plurality of power levels, determining a threshold from the baseline power level, and monitoring at least a portion of the plurality of resource blocks for signal interference according to the threshold. Other embodiments are disclosed.

Claims

1. A method, comprising:

measuring, by a system comprising a processor, a power level in each of a plurality of resource blocks occurring in a radio frequency spectrum of a wireless communication system, wherein the measuring occurs for a plurality of time cycles to generate a plurality of power level measurements for each resource block;

calculating, by the system, a baseline power level for each resource block of the plurality of resource blocks according to at least one of the plurality power level measurements of each resource block to generate a plurality of baseline power levels for the plurality of resource blocks;

calculating, by the system, an aggregate baseline power level according to at least a portion of the plurality of baseline power levels;

determining, by the system, a threshold from the aggregate baseline power level;

monitoring, by the system, the plurality of resource blocks for signal interference according to the threshold; and

detecting, by the system, the signal interference in at least one resource block of the plurality of resource blocks according to the threshold.

2. The method of claim 1, comprising:

repeating a portion of the foregoing steps to determine an adaptive threshold; and

repeating the monitoring and detecting steps according to the adaptive threshold.

3. The method of claim 1, comprising mitigating the signal interference in at least one resource block.

4. The method of claim 3, wherein mitigating comprises filtering the signal interference.

5. The method of claim 3, wherein mitigating comprises submitting a notification message, wherein the notification message comprises spectral information associated with the signal interference.

6. The method of claim 3, wherein mitigating comprises avoiding the signal interference.

7. The method of claim 1, comprising determining an identification of a source of the signal interference in at least one resource block.

8. The method of claim 7, comprising instructing the source of the signal interference to perform an action that reduces or eliminates the signal interference.

9. The method of claim 1, wherein the wireless communication system functions according to a long term evolution (LTE) protocol.

10. The method of claim 9, wherein the LTE protocol is promulgated by a wireless communication standards organization.

11. The method of claim 10, wherein the wireless communication standards organization is the 3^rd Generation Partnership Project (3GPP) group.

12. The method of claim 1, wherein the method is performed on a downlink of the wireless communication system.

13. The method of claim 12, wherein signals transmitted in the downlink are orthogonal frequency-division multiple access (OFDMA) signals.

14. The method of claim 1, wherein the method is performed on an uplink of the wireless communication system.

15. The method of claim 14, wherein signals transmitted in the uplink are single carrier frequency-division multiple access (SC-FDMA) signals.

16. The method of claim 1, comprising discarding one of a first portion of the plurality of power measurements prior to calculating the baseline power level for each resource block, a second portion the plurality of baseline power levels prior to calculating the baseline power level, or any combination thereof.

17. The method of claim 1, comprising ignoring any of the plurality of resource blocks with no data traffic.

18. A memory device, comprising instructions, which when executed by a processor, cause the processor to perform operations comprising:

measuring a power level in each segment of a plurality of segments occurring in a radio frequency spectrum of a wireless communication system, wherein the measuring occurs for at least a plurality of time cycles to generate a plurality of power level measurements for each segment;

calculating a normalized power level for each segment of the plurality of segments according to at least one of the plurality power level measurements of each segment to generate a plurality of normalized power levels for the plurality of segments;

calculating an aggregate normalized power level according to at least a portion of the plurality of normalized power levels;

determining a threshold from the aggregate normalized power level; and

monitoring the plurality of segments for signal interference according to the threshold.

19. The memory device of claim 18, wherein the operations further comprises detecting the signal interference in at least one segment of the plurality of segments according to the threshold.

20. The memory device of claim 18, wherein each segment of the plurality of segments comprises a resource block conforming to a long term evolution (LTE) protocol.

21. A system, comprising:

a memory to store instructions; and

a processor coupled to the memory, wherein responsive to executing the instructions, the processor performs operations comprising;

measuring a power level in at least a portion of a plurality of resource blocks occurring in a radio frequency spectrum, wherein the measuring occurs for a plurality of time cycles to generate a plurality of power level measurements;

calculating a baseline power level according to at least a portion of the plurality of power levels;

determining a threshold from the baseline power level; and

monitoring at least a portion of the plurality of resource blocks for signal interference according to the threshold.

22. The system of claim 21, comprising:

repeating the measuring, the calculating, and the determining steps to determine an adaptive threshold; and

repeating the monitoring step according to the adaptive threshold.

23. The system of claim 21, wherein the system comprises one of a cellular base station, an access point, a small cell base station, or a mobile communication device.

24. A system, comprising:

a memory to store instructions; and

a processor coupled to the memory, wherein responsive to executing the instructions, the processor performs operations comprising;

measuring a power level in at least a portion of a plurality of resource blocks occurring in a radio frequency spectrum, wherein the measuring occurs for a plurality of time cycles to generate a plurality of power level measurements;

determining a baseline power level for each of the plurality of resource blocks or subgroups thereof according to the power level measured for at least the portion of the plurality resource blocks;

determining a threshold from the baseline power level for each of the plurality of resource blocks or subgroups thereof; and

monitoring at least a portion of the plurality of resource blocks for signal interference according to the threshold of each of the plurality of resource blocks or subgroups thereof.

25. The system of claim 24, wherein the baseline power level is determined according to a forgetting factor filter.