Method and apparatus for mitigating interference in CPRI uplink paths

• US 10,491,252 B2
• Filed: 10/12/2017
• Issued: 11/26/2019
• Est. Priority Date: 04/05/2017
• Status: Active Grant

• Current Assignee: ISCO International Inc.
• Original Assignee: ISCO International LLC
• Inventors: Goodman, Igor, Abdelmonem, Amr
• Primary Examiner(s): Doan, Kiet M
• Application Number:
  US15/730,878
• Publication Number:
  US 20180295632A1
• Time in Patent Office: 775 Days
• Field of Search: 455522, 4555621, 455450, 455509, 370315, 370343, 370329, 370477, 370278, 398116, 398 5, 398 26
• 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 1/7097 Interference-related aspects
• CPC Class Codes: H04B 10/25 Arrangements specific to fibre transmission
• CPC Class Codes: H04B 17/309 Measuring or estimating channel quality parameters
• CPC Class Codes: H04B 17/336 Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]
• 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 2001/1045 Adjacent-channel interference
• CPC Class Codes: H04B 2001/1054 by changing bandwidth
• CPC Class Codes: H04B 2001/1072 by tuning the receiver frequency
• CPC Class Codes: H04B 2201/70728 Frequency aspects
• CPC Class Codes: H04J 11/0023 Interference mitigation or co-ordination direct sequence spread spectrum [DSSS] systems H04B1/7097; frequency hopping H04B1/713; allocation criteria for ingress interference avoidance H04L5/0062; frequency allocation criteria for requirements on out-of-channel emissions H04L5/0066; arrangements for removing intersymbol interference or baseband equalisers H04L25/03006; peak power aspects in multicarrier modulation H04L27/2614; power management H04W52/00; traffic scheduling H04W72/54, H04W72/541
• CPC Class Codes: H04J 11/005 of intercell interference
• CPC Class Codes: H04J 11/0056 Inter-base station aspects
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04L 1/0021 in which the algorithm uses adaptive thresholds
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/242 by comparing a transmitted test signal with a locally generated replica
• CPC Class Codes: H04L 41/0823 characterised by the purposes of a change of settings, e.g. optimising configuration for enhancing reliability for optimising operational conditions of wireless networks H04W24/02
• CPC Class Codes: H04L 41/12 Discovery or management of network topologies
• CPC Class Codes: H04L 43/0829 Packet loss
• CPC Class Codes: H04L 43/0852 : Delays
• CPC Class Codes: H04L 43/16 : Threshold monitoring
• CPC Class Codes: H04L 43/50 : Testing arrangements
• CPC Class Codes: H04L 45/22 : Alternate routing
• CPC Class Codes: H04L 45/243 : using M+N parallel active paths
• CPC Class Codes: H04L 45/28 : using route fault recovery
• CPC Class Codes: H04L 5/001 : the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0053 : Allocation of signaling, i.e. of overhead other than pilot signals
• 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: H04L 5/0082 : at predetermined intervals
• CPC Class Codes: H04L 69/323 : in the physical layer [OSI layer 1]
• CPC Class Codes: H04W 16/32 : Hierarchical cell structures
• CPC Class Codes: H04W 24/02 : Arrangements for optimising operational condition
• CPC Class Codes: H04W 24/06 : Testing, supervising or monitoring using simulated traffic
• 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 36/08 : Reselecting an access point
• CPC Class Codes: H04W 36/20 : for optimising the interference level
• CPC Class Codes: H04W 40/02 : Communication route or path selection, e.g. power-based or shortest path routing
• CPC Class Codes: H04W 40/12 : based on transmission quality or channel quality
• CPC Class Codes: H04W 52/241 : taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 72/044 : based on the type of the allocated resource
• CPC Class Codes: H04W 72/0453 : Resources in frequency domain, e.g. a carrier in FDMA
• CPC Class Codes: H04W 72/29 : between an access point and the access point controlling device
• CPC Class Codes: H04W 72/51 : based on terminal or device properties
• CPC Class Codes: H04W 72/541 : using the level of interference
• CPC Class Codes: H04W 72/542 : using measured or perceived quality
• CPC Class Codes: H04W 88/08 : Access point devices
• CPC Class Codes: H04W 88/085 : Access point devices with remote components
• CPC Class Codes: H04W 92/20 : between access points
• CPC Class Codes: Y02D 30/70 : in wireless communication networks

Abstract

A system that incorporates aspects of the subject disclosure may perform operations including, for example, obtaining uplink information associated with a downlink path, wherein the uplink information includes operational parameters used by a plurality of communication devices for transmitting wireless signals on a plurality of uplink paths, performing, based on the uplink information, a plurality of measurements of the plurality of uplink paths via a plurality of fiber optic cables from a plurality of remote radio units, wherein the plurality of uplink paths conform to a common public radio interface (CPRI) protocol, identifying a measurement from the plurality of measurements that is below a threshold, thereby indicating an affected uplink path of the plurality of uplink paths, and initiating a corrective action to improve a measurement of the affected uplink path based on the identifying. Other embodiments are disclosed.

Claims

1. A method, comprising:

obtaining, by a system comprising a processor, uplink information associated with a plurality of communication devices transmitting wireless signals on a plurality of uplink paths, wherein the uplink information comprises at least one system information block (SIB) associated with a downlink path;

receiving, by the system, via a plurality of fiber optic cables, the plurality of uplink paths from a plurality of remote radio units, wherein the plurality of uplink paths conform to a common public radio interface (CPRI) protocol;

performing, by the system, based on the uplink information, a plurality of measurements comprising a Signal to Interference plus Noise Ratio (SINR) measurement of each of the plurality of uplink paths;

identifying, by the system, a measurement from the plurality of measurements that is below a threshold, wherein the measurement is associated with an affected uplink path of the plurality of uplink paths; and

initiating, by the system, a corrective action to improve the measurement of the affected uplink path of the plurality of uplink paths;

wherein the corrective action comprises moving the affected uplink path to one or more available resource blocks.

2. The method of claim 1, further comprising determining, by the system, according to the uplink information, the one or more available resource blocks.

3. The method of claim 2, wherein the determining further comprises confirming that the one or more available resource blocks are below a noise threshold.

4. The method of claim 1, wherein the obtaining comprises monitoring, by the system, a downlink signal associated with a downlink path to obtain the uplink information.

5. The method of claim 1, wherein the obtaining comprises receiving, by the system, the uplink information from a base station processor.

6. The method of claim 5, wherein SIB comprises a physical resource block (PRB).

7. The method of claim 1, wherein the uplink information identifies a number of the plurality of communication devices transmitting wireless signals on the plurality of uplink paths.

8. The method of claim 1, wherein the uplink information identifies a power level used by the plurality of communication devices for transmitting wireless signals on the plurality of uplink paths.

9. The method of claim 1, wherein the uplink information identifies resource blocks used by the plurality of communication devices for transmitting wireless signals on the plurality of uplink paths.

10. The method of claim 1, wherein the corrective action comprises adjusting a number of the plurality of communication devices allowed to transmit wireless signals on the plurality of uplink paths.

11. The method of claim 1, wherein the plurality of uplink paths conforms to a 4G, 5G, or a next generation signaling protocol.

12. A system, comprising:

a processor; and

a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising;

obtaining uplink information associated with a downlink path, wherein the uplink information includes operational parameters used by a plurality of communication devices for transmitting wireless signals on a plurality of uplink paths;

wherein the uplink information comprises at least one system information block (SIB) associated with a downlink path;

performing, based on the uplink information, a plurality of measurements comprising a Signal to Interference plus Noise Ratio (SINR) measurement of each of the plurality of uplink paths via a plurality of fiber optic cables from a plurality of remote radio units, wherein the plurality of uplink paths conform to a common public radio interface (CPRI) protocol;

identifying a measurement from the plurality of measurements that is below a threshold, thereby indicating an affected uplink path of the plurality of uplink paths; and

initiating a corrective action to improve the measurement of the affected uplink path based on the identifying, wherein the corrective action comprises moving the affected uplink path to one or more available resource blocks.

13. The system of claim 12, wherein the wireless signals comprise a plurality of frequency bands.

14. The system of claim 12, wherein SIB comprises a physical resource block (PRB).

15. The system of claim 12, wherein the corrective action comprises adjusting a number of the plurality of communication devices allowed to transmit wireless signals on the plurality of uplink paths.

16. The system of claim 12, wherein corrective action comprises moving the affected uplink path to one or more available resource blocks less affected by interference than the affected uplink path.

17. A machine-readable storage medium, comprising executable instructions that, when executed by a processor, facilitate performance of operations, comprising:

performing, based on uplink information, a plurality of measurements, wherein each measurement of the plurality of measurements comprises a Signal to Interference plus Noise Ratio (SINR) measurement of an uplink path of a plurality of uplink paths received via a plurality of fiber optic cables from a plurality of remote radio units, wherein the plurality of uplink paths conform to a common public radio interface (CPRI) protocol, wherein the uplink information is associated with downlink instructions supplied to a plurality of communication devices to facilitate transmission of wireless signals on the plurality of uplink paths, wherein the uplink information comprises at least one system information block (SIB) associated with a downlink path;

identifying an affected uplink path of the plurality of uplink paths from a measurement from the plurality of measurements that is below a threshold; and

responsive to the identifying, initiating a corrective action to improve communications over the affected uplink path, wherein the corrective action comprises moving the affected uplink path to one or more available resource blocks.

18. The machine-readable storage medium of claim 17, wherein corrective action comprises moving the affected uplink path to one or more available resource blocks less affected by interference than the affected uplink path.

19. The machine-readable storage medium of claim 17, wherein the corrective action comprises adjusting a number of the plurality of communication devices allowed to transmit wireless signals on the plurality of uplink paths.

20. The machine-readable storage medium of claim 17, wherein SIB comprises a physical resource block (PRB).