Secure network information exchange for external interference detection and system for same
A system and method that utilize data from co-sited cells that transmit and receive data on frequencies that are licensed to different operators facilitate sharing cellular configuration and performance data without revealing proprietary data to competing operators. Detection of external interference is enhanced by data from different operators.
1. A method for determining interference that is external to cellular telecommunications, the method comprising:
in a secure module that prevents a first operator that operates a first cellular network from accessing network configuration and performance data of a second operator that operates a second cellular network, and prevents the second operator from accessing network configuration and performance data of the first operator:
receiving network configuration data and network performance data for a first cell operated by a first operator, the performance data including interference measurements for first frequencies that are licensed to the first operator;
receiving network configuration data for a second cell operated by a second operator and co-sited with the first cell, the network configuration data including downlink frequencies for second frequencies that are licensed to the second operator; and
determining, by the secure module, whether transmissions from the second cell cause passive intermodulation (PIM) products that affect the first cell using the network performance data from the first cell and the configuration data from the second cell,
wherein the first frequencies are not used by the second operator, the second frequencies are not used by the first operator.
2. The method of claim 1 , further comprising:
receiving downlink power information of a plurality of transmitters;
determining intermodulation product information for the plurality of transmitters; and
using the downlink power information and the intermodulation product information to determine interference generated by PIM.
3. The method of claim 2 , wherein determining the interference generated by PIM comprises:
determining, using the intermodulation product information and the downlink power information, a Weighted Downlink Power (WDP) signal for an intermodulation product, the WDP signal including a plurality of expected power values; and
determining, using the WDP signal, a PIM Detection Assessment (PIMDA) score of the intermodulation product, wherein a value of the PIMDA score corresponds to interference generated by PIM.
4. The method of claim 3 , wherein determining the PIMDA score comprises:
generating, using the WDP signal and the uplink interference information, a plurality of linear models for the intermodulation products;
determining, using the linear models, a plurality of features of the intermodulation product; and
determining, using the plurality of features, the PIMDA score, wherein a value of the PIMDA score corresponds to interference generated by PIM and received by the receiver.
5. The method of claim 4 , wherein generating the plurality of linear models includes:
generating a global linear model expressing a relationship between all of the expected power values of the WDP signal and the corresponding received interference values of the uplink interference information;
partitioning the expected power values of the WDP signal into a plurality of segments, and
generating a local linear model for each of the segments, the local linear model expressing relationships between all of the expected power values of the segment and the corresponding received interference values of the uplink interference information,
wherein the segments are disjointed from each other.
6. The method of claim 2 , wherein the intermodulation product information includes information for intermodulation products that occur in uplink frequencies allocated to both of the first and second operators.
7. The method of claim 2 , wherein the downlink power information includes information for downlink frequencies allocated to both of the first and second operators.
8. The method of claim 2 , wherein at least one of the first cell and the second cell transmit and receive signals using time division duplexing (TDD).
9. The method of claim 8 , wherein both of the first and second networks are TDD networks, and a time that is allocated for transmitting in the first network is allocated to receiving in the second network.
10. The method of claim 1 , further comprising:
determining first downlink and uplink frequencies for the first operator from the network configuration data;
determining second downlink and uplink frequencies for the second operator from the network configuration data; and
determining PIM products for downlink transmissions in both of the first and second uplink frequencies.
11. A system for determining interference that is external to cellular telecommunications, the system comprising at least one non-transitory computer readable medium with computer executable instructions stored thereon which, when executed by a processor, perform the following operations:
receiving network configuration data and network performance data for a first cell operated by a first operator, the performance data including interference measurements for first frequencies that are licensed to the first operator;
receiving network configuration data for a second cell operated by a second operator and co-sited with the first cell, the network configuration data including downlink frequencies of second frequencies that are licensed to the second operator; and
determining, by the secure module, whether transmissions from the second cell cause passive intermodulation (PIM) products that affect the first cell using the network performance data from the first cell and the configuration data from the second cell,
wherein the first frequencies are not used by the second operator, the second frequencies are not used by the first operator,
wherein the system is a secure system that prevents the first operator from accessing network configuration and performance data of the second operator, and prevents the second operator from accessing network configuration and performance data of the first operator.
12. The system of claim 11 , wherein the operations performed by the non-transitory computer readable medium further comprise:
receiving downlink power information of a plurality of transmitters;
determining intermodulation product information for the plurality of transmitters; and
using the downlink power information and the intermodulation product information to determine interference generated by PIM.
13. The system of claim 12 , wherein the operations performed by the non-transitory computer readable medium further comprise:
determining, using the intermodulation product information and the downlink power information, a Weighted Downlink Power (WDP) signal for an intermodulation product, the WDP signal including a plurality of expected power values; and
determining, using the WDP signal, a PIM Detection Assessment (PIMDA) score of the intermodulation product, wherein a value of the PIMDA score corresponds to interference generated by PIM.
14. The system of claim 13 , wherein determining the PIMDA score comprises:
generating, using the WDP signal and the uplink interference information, a plurality of linear models for the intermodulation products;
determining, using the linear models, a plurality of features of the intermodulation product; and
determining, using the plurality of features, the PIMDA score, wherein a value of the PIMDA score corresponds to interference generated by PIM and received by the receiver.
15. The system of claim 12 , wherein the intermodulation product information includes information for intermodulation products that occur in uplink frequencies allocated to both of the first and second operators.
16. The system of claim 11 , further comprising:
a central computing system that is not exclusively controlled by the first operator or the second operator that includes the non-transitory computer readable medium.
17. The system of claim 11 , further comprising:
a computer that includes the non-transitory computer readable medium and is controlled by the first operator,
wherein the network performance data for the second cell is encrypted by the second operator, and the system prevents the first operator from accessing the network performance data for the second cell.
18. The system of claim 17 , further comprising:
a second computer that includes a second non-transitory computer readable medium and is controlled by the second operator, the second non-transitory computer readable medium having computer executable instructions stored thereon which, when executed by a processor of the second computer, perform the following operations:
receiving the network configuration data and network performance data for the first cell operated by the first operator in an encrypted format;
receiving network configuration data and network performance data for the second cell; and
identifying interference external to the cellular telecommunications system that affects the first cell and the second cell using the network performance data from the first and second cells,
wherein the network performance data for the second cell is encrypted by the second operator, and the system prevents the first operator from accessing the network performance data for the second cell.
19. The system of claim 11 , wherein the first cell and the second cell transmit and receive signals using time division duplexing (TDD), and a transmission time of the first cell overlaps with a reception time of the second cell.
20. The system of claim 11 , wherein the system determines that PIM products from transmissions by the second cell cause interference to uplink frequencies of the first cell.