Cooperative realtime management of noise interference in ISM band

• US 10,736,052 B2
• Filed: 04/25/2019
• Issued: 08/04/2020
• Est. Priority Date: 04/27/2017
• Status: Active Grant

• Current Assignee: Thales Avionics Incorporated (Thales SA)
• Original Assignee: Thales Avionics Incorporated (Thales SA)
• Inventors: Rabii, Khosro, Couleaud, Jean-Yves, Schuberth, Pierre, Le May, Cedric
• Primary Examiner(s): Patel, Parth
• Application Number:
  US16/394,635
• Publication Number:
  US 20190253980A1
• Time in Patent Office: 467 Days
• CPC Class Codes: H04B 17/327 Received signal code power [RSCP]
• CPC Class Codes: H04W 16/10 Dynamic resource partitioning
• CPC Class Codes: H04W 16/18 Network planning tools
• CPC Class Codes: H04W 24/10 Scheduling measurement reports ; Arrangements for measurement reports
• 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 4/80 Services using short range communication, e.g. near-field communication [NFC], radio-frequency identification [RFID] or low energy communication
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 64/003 locating network equipment
• CPC Class Codes: H04W 76/15 Setup of multiple wireless link connections

Abstract

An in-flight entertainment system includes a plurality of static transceivers and an ISM band communication interference manager. The static transceivers are configured to transmit and receive radio frequency signals in the ISM band. The static transceivers are further configured to measure signals received within the ISM band from mobile transceivers within the aircraft and to measure signals received from proximately located ones of the static transceivers, and to generate measurement reports containing the measurements and containing identifiers of the proximately located ones of the static transceivers and the mobile transceivers. The ISM band communication interference manager is communicatively connected to the static transceivers, and performs operations that include receiving the measurement reports from the static transceivers, and controlling transmission power levels used by the static transceivers and the mobile transceivers responsive to the content of the measurement reports.

Claims

1. A communication interference management system comprising:

a network interface that communicates with a plurality of spaced apart static transceivers through a network;

a processor coupled to the network interface; and

a memory coupled to the processor and storing program code that when executed by the processor causes the processor to perform operations comprising;

receiving measurement reports from the static transceivers, the measurement reports containing measurements of signals received from mobile transceivers operating within the network and measurement of signals received from proximately located ones of the static transceivers;

generating a layout map that identifies the distances and relative directions between the static transceivers;

controlling transmission power levels used by at least one of the static transceivers and the mobile transceivers, responsive to the content of the measurement reports and the layout map.

2. The communication interference management system of claim 1, wherein the network comprises a network of an aircraft cabin;

and

wherein the layout map comprises an aircraft cabin layout map.

3. The communication interference management system of claim 1, wherein the measurement reports received from the static transceivers contain received signal strength measurements for signals received by the static transceivers from mobile transceivers and corresponding identifiers of the mobile transceivers from which the signals were received, and the operations further comprising:

comparing the received signal strength measurements contained in the measurement reports to identify an interfering mobile transceiver having a transmission power level that satisfies a rule indicating excessive interference to a plurality of the static transceivers;

identifying one of the static transceivers that is communicating with the interfering mobile transceiver; and

communicating through the network a power control message addressed toward the identified one of the static transceivers that contains a command to reduce the transmission power level used by the interfering mobile transceiver.

4. The communication interference management system of claim 3, the operations further comprising:

determining from further received measurement reports from the identified one of the static transceivers that the interfering mobile transceiver has not reduced or sufficiently reduced its transmission power level responsive to the command; and

generating a frequency change message communicated toward the identified one of the static transceivers for transmission to the interfering mobile transceiver that contains a command for the interfering mobile transceiver to use a frequency for transmission that is outside a group of frequencies that are reserved for use by the static transceivers to communicate with mobile transceivers other than the interfering mobile transceiver.

5. The communication interference management system of claim 1, wherein the measurement reports received from each of the static transceivers contain received signal strength measurements for signals received by the static transceiver from mobile transceivers and corresponding identifiers of the mobile transceivers from which the signals were received, and the operations further comprise:

comparing the received signal strength measurements contained in the measurement reports to identify a first group of the static transceivers that are using transmission power levels that are more than a threshold amount greater than an average transmission power level used by a second group of the static transceivers that is proximately located to the first group of the static transceivers; and

communicating through the network power control messages addressed toward the first group of the static transceivers that contain commands to reduce the transmission power level used by the first group of the static transceivers.

6. The communication interference management system of claim 1, wherein the operations to control transmission power levels used by the static transceivers and the mobile transceivers, comprise:

identifying, based on the measurement reports, an interfered one of the static transceivers subjected to communication interference that exceeds a defined rule;

identifying one of the static transceivers proximately located to the interfered one of the static transceivers; and

communicating through the network a power control message addressed toward the identified one of the static transceivers that contains a command to reduce the transmission power level used by the identified one of the static transceivers and/or to reduce the transmission power level used by at least one of the mobile transceivers communicating with the identified one of the static transceivers.

7. The communication interference management system of claim 6, the operations further comprising:

determining the distances between the static transceivers based on received signal strength measurements indicated by the measurement reports of signals received by the static transceivers from other ones of the static transceivers; and

determining the relative directions between the static transceivers based on triangulating the determined distances between the static transceivers identified by the measurement reports;

using the layout map and relative strengths of the signals received by the static transceivers from the other static transceivers, to determine maximum transmission power levels that each of the static transceivers should stay below when transmitting to mobile transceivers; and

communicating through the network power control messages addressed toward each of the static transceivers that contains a command indicating the maximum transmission power levels determined for the static transceiver.

8. The communication interference management system of claim 6, the operations further comprising:

determining the distances between the static transceivers based on received signal strength measurements indicated by the measurement reports of signals received by the static transceivers from other ones of the static transceivers;

determining the relative directions between the static transceivers based on triangulating the determined distances between the static transceivers identified by the measurement reports;

determining, based on the layout map and received signal strength measurements indicated by the measurement reports of signals received by the static transceivers from other ones of the static transceivers, transmission power levels that each of the static transceivers are using to communicate with mobile transceivers; and

based on the transmission power levels that each of the static transceivers are determined to be using to communicate and based on the distances and relative directions between the static transceivers indicated by the layout map, communicating through the network power control messages addressed toward the static transceivers that contain commands controlling the transmission power levels used by the static transceivers.

9. The communication interference management system of claim 6, wherein the power control message contains a command to reduce the transmission power level used by a particular mobile transceiver communicating with the identified one of the static transceivers, and the operations further comprise:

identifying that the particular mobile transceiver is a rogue mobile transceiver based on it not reducing or sufficiently reducing its transmission power level responsive to the command; and

generating a frequency change message communicated through the identified one of the static transceivers for transmission to the rogue mobile transceiver that contains a command for the rogue mobile transceiver to use a frequency for transmission that is outside a group of frequencies that are reserved for use by the static transceivers to communicate with mobile transceivers other than the interfering mobile transceiver.

10. The communication interference management system of claim 9, further comprising:

generating the frequency change message configured as a connection request message that identifies the frequency at which the rogue mobile transceiver is to transmit connection setup information to the identified one of the static transceivers.

11. The communication interference management system of claim 9, further comprising:

generating the frequency change message configured as a pairing request message identifying the frequency at which the rogue mobile transceiver is to transmit pairing information to the identified one of the static transceivers.

12. The communication interference management system of claim 9, wherein the operations for identifying that the particular mobile transceiver is a rogue mobile transceiver based on it not reducing or sufficiently reducing its transmission power level responsive to the command, comprise:

monitoring measurement reports received from the static transceivers to determine whether the mobile transceivers are sufficiently changing their transmission power levels responsive to the transmission power level control commands contained in the power control messages communicated through the static transceivers.

13. The communication interference management system of claim 6, wherein the power control message contains a command to reduce the transmission power level used by a particular mobile transceiver communicating with the identified one of the static transceivers, and the operations further comprise:

identifying that the particular mobile transceiver is a rogue mobile transceiver based on it not reducing or sufficiently reducing its transmission power level responsive to the command;

further identifying that the rogue mobile transceiver is a passenger control unit (PCU) that is paired through a Bluetooth wireless link to a seat video display unit (SVDU) of an aircraft having a housing containing the identified one of the static transceiver; and

responsive to the rouge mobile transceiver being a PCU, generating a passenger request message communicated to the SVDU that contains a request configured for display on a display device of the SVDU instructing a passenger to return the PCU to a dock device that associated with the SVDU and configured to releasably store the PCU.

14. The communication interference management system of claim 6, wherein the power control message contains a command to reduce the transmission power level used by the identified one of the static transceivers to communicate with a particular mobile transceiver, and the operations further comprise:

identifying that the particular mobile transceiver is a rogue mobile transceiver based on it sending signal measurement reports that incorrectly indicate low received signal strengths to the identified one of the static transceivers that are causing excessively high levels of transmission power from the identified one of the static transceivers; and

generating a disregard report message communicated toward the identified one of the static transceivers instructing the identified one of the static transceivers to not use measurement reports that are received from the rogue mobile transceiver when determining what transmission power level the identified one of the static transceivers will use for transmissions.

15. A method performed by a communication interference management system, the method comprising:

receiving measurement reports from a plurality of static transceivers spaced apart through a network, the measurement reports containing measurements of signals by the static transceivers from mobile transceivers operating within the network and measurements of signals received from proximately located ones of the static transceivers;

generating a layout map that identifies the distances and relative directions between the static transceivers; and

controlling transmission power levels used by at least one of the static transceivers and the mobile transceivers responsive to the content of the measurement reports and the layout map.

16. The method of claim 15, wherein the network comprises a network of an aircraft cabin;

and

wherein the layout map comprises an aircraft cabin layout map.

17. The method of claim 15, wherein the measurement reports received from each of the static transceivers contain received signal strength measurements for signals received by the static transceiver from mobile transceivers and corresponding identifiers of the mobile transceivers from which the signals were received, and the method further comprising:

comparing the received signal strength measurements contained in the measurement reports to identify an interfering mobile transceiver having a transmission power level that satisfies a rule indicating excessive interference to a plurality of the static transceivers;

identifying one of the static transceivers that is communicating with the interfering mobile transceiver; and

communicating through the network a power control message addressed toward the identified one of the static transceivers that contains a command to reduce the transmission power level used by the interfering mobile transceiver.

18. The method of claim 17, further comprising:

determining from further received measurement reports from the identified one of the static transceivers that the interfering mobile transceiver has not reduced or sufficiently reduced its transmission power level responsive to the command; and

generating a frequency change message communicated toward the identified one of the static transceivers for transmission to the interfering mobile transceiver that contains a command for the interfering mobile transceiver to use a frequency for transmission that is outside a group of frequencies that is reserved for use by the static transceivers to communicate with mobile transceivers other than the interfering mobile transceiver.

19. The method of claim 15, wherein the measurement reports received from each of the static transceivers contain received signal strength measurements for signals received by the static transceiver from mobile transceivers and corresponding identifiers of the mobile transceivers from which the signals were received, and the method further comprising:

comparing the received signal strength measurements contained in the measurement reports to identify a first group of the static transceivers that are using transmission power levels that are more than a threshold amount greater than an average transmission power level used by a second group of the static transceivers that is proximately located to the first group of the static transceivers; and

communicating through the network power control messages addressed toward the first group of the static transceivers that contain commands to reduce the transmission power level used by the first group of the static transceivers.

20. The method of claim 15, wherein controlling transmission power levels used by the static transceivers and the mobile transceivers, further comprises:

identifying, based on the measurement reports, an interfered one of the static transceivers subjected to communication interference that exceeds a defined rule;

identifying one of the static transceivers proximately located to the interfered one of the static transceivers; and

communicating through the network a power control message addressed toward the identified one of the static transceivers that contains a command to reduce the transmission power level used by the identified one of the static transceivers and/or to reduce the transmission power level used by at least one of the mobile transceivers communicating with the identified one of the static transceivers.

21. The method of claim 20, further comprising:

determining the distances between the static transceivers based on received signal strength measurements indicated by the measurement reports of signals received by the static transceivers from other ones of the static transceivers;

determining the relative directions between the static transceivers based on triangulating the determined distances between the static transceivers identified by the measurement reports;

using the layout map and relative strengths of the signals received by the static transceivers from the other static transceivers, to determine maximum transmission power levels that each of the static transceivers should stay below when transmitting to mobile transceivers; and

communicating through the network power control messages addressed toward each of the static transceivers that contains a command indicating the maximum transmission power levels determined for the static transceiver.

22. The method of claim 20, further comprising:

determining the distances between the static transceivers based on received signal strength measurements indicated by the measurement reports of signals received by the static transceivers from other ones of the static transceivers;

determining the relative directions between the static transceivers based on triangulating the determined distances between the static transceivers identified by the measurement reports;

determining, based on the cabin layout map and received signal strength measurements indicated by the measurement reports of signals received by the static transceivers from other ones of the static transceivers, transmission power levels that each of the static transceivers are using to communicate with mobile transceivers; and

based on the transmission power levels that each of the static transceivers are determined to be using to communicate and based on the distances and relative directions between the static transceivers indicated by the layout map, communicating through the network power control messages addressed toward the static transceivers that contain commands controlling the transmission power levels used by the static transceivers.

23. The method of claim 20, wherein the power control message contains a command to reduce the transmission power level used by a particular mobile transceiver communicating with the identified one of the static transceivers, and the method further comprising:

identifying that the particular mobile transceiver is a rogue mobile transceiver based on it not reducing or sufficiently reducing its transmission power level responsive to the command; and

generating a frequency change message communicated through the identified one of the static transceivers for transmission to the rogue mobile transceiver that contains a command for the rogue mobile transceiver to use a frequency for transmission that is outside a group of frequencies that are reserved for use by the static transceivers to communicate with mobile transceivers other than the interfering mobile transceiver,

wherein the frequency change message is generated to be configured as a connection request message that identifies the frequency at which the rogue mobile transceiver is to transmit connection setup information to the identified one of the static transceivers.

24. The method of claim 23, wherein the identifying that the particular mobile transceiver is a rogue mobile transceiver based on it not reducing or sufficiently reducing its transmission power level responsive to the command, and the method further comprising:

monitoring measurement reports received from the static transceivers to determine whether the mobile transceivers are sufficiently changing their transmission power levels responsive to the transmission power level control commands contained in the power control messages communicated through the static transceivers.

25. The method of claim 20, wherein the power control message contains a command to reduce the transmission power level used by a particular mobile transceiver communicating with the identified one of the static transceivers, and the method further comprising:

identifying that the particular mobile transceiver is a rogue mobile transceiver based on it not reducing or sufficiently reducing its transmission power level responsive to the command;

further identifying that the rogue mobile transceiver is a passenger control unit (PCU) that is paired through a Bluetooth wireless link to a seat video display unit (SVDU) of an aircraft cabin having a housing containing the identified one of the static transceiver; and

responsive to the rouge mobile transceiver being a PCU, generating a passenger request message communicated to the SVDU that contains a request configured for display on a display device of the SVDU instructing a passenger to return the PCU to a dock device that associated with the SVDU and configured to releasably store the PCU.

26. The method of claim 20, wherein the power control message contains a command to reduce the transmission power level used by the identified one of the static transceivers to communicate with a particular mobile transceiver, and the method further comprising:

identifying that the particular mobile transceiver is a rogue mobile transceiver based on it sending signal measurement reports that incorrectly indicate low received signal strengths to the identified one of the static transceivers that are causing excessively high levels of transmission power from the identified one of the static transceivers; and

generating a disregard report message communicated toward the identified one of the static transceivers instructing the identified one of the static transceivers to not use measurement reports that are received from the rogue mobile transceiver when determining what transmission power level the identified one of the static transceivers will use for transmissions.

27. A computer program product comprising a non-transitory computer readable medium of a communication interference management system, the computer readable medium comprising instructions that when executed by a processor of the communication interference management system causes the processor to perform operations comprising:

receiving measurement reports from a plurality of static transceivers spaced apart through a network, the measurement reports containing measurements of signals by the static transceivers from mobile transceivers operating within the network and measurements of signals received from proximately located ones of the static transceivers;

generating a layout map that identifies the distances and relative directions between the static transceivers; and

controlling transmission power levels used by at least one of the static transceivers and the mobile transceivers responsive to the content of the measurement reports and the layout map.