Multi-radio coexistence

• US 9,144,084 B2
• Filed: 06/08/2012
• Issued: 09/22/2015
• Est. Priority Date: 06/13/2011
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sadek, Ahmed K., Kadous, Tamer Adel, Mantravadi, Ashok, Wang, Jibing
• Primary Examiner(s): Mohebbi, Kouroush
• Application Number:
  US13/491,931
• Publication Number:
  US 20120314598A1
• Time in Patent Office: 1,201 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

Prior to implementing a coexistence solution for a multi-radio device, a measurement determines whether interference experienced by one radio is caused by another radio on the device. This determination includes comparing measurements of the first radio during times when the other radio is operational and when the other radio is inactive. If the compared performance measurements are within a certain range, a coexistence/interference management solution may be implemented.

Claims

1. A method for wireless communications, comprising:

measuring a first communication performance of a first radio access technology (RAT) of a user equipment during a first time period when a second RAT of the user equipment is not operating;

measuring a second communication performance of the first RAT during a second time period;

comparing the first communication performance measurement to the second communication performance measurement;

determining that the second RAT is causing interference to the first RAT based on the second communication performance measurement differing from the first communication performance measurement by a threshold;

calculating a packet delay statistic for the first RAT; and

implementing, at a third time period, a coexistence management solution based at least in part on the determining and in part on the packet delay statistic, the third time period arriving after the first time period and the second time period, in which the coexistence management solution reduces interference to the first RAT from the second RAT.

2. The method of claim 1 in which the first RAT comprises Bluetooth and the second RAT comprises Long Term Evolution (LTE).

3. The method of claim 1 in which the coexistence management solution comprises power backoff.

4. The method of claim 1 in which the coexistence management solution comprises frequency handover.

5. The method of claim 1 in which the second RAT is operating during the second time period.

6. The method of claim 1 in which the measuring the first communication performance during the first time period comprises measuring at least one of a packet error rate, slot error rate, received signal strength indicator (RSSI), header error check (HEC) error rate, a number of detected receive slots, a head of queue packet delay, or a number of flushes.

7. An apparatus for wireless communication, comprising:

means for measuring a first communication performance of a first radio access technology (RAT) of a user equipment during a first time period when a second RAT of the user equipment is not operating;

means for measuring a second communication performance of the first RAT during a second time period;

means for comparing the first communication performance measurement to the second communication performance measurement;

means for determining that the second RAT is causing interference to the first RAT based on the second communication performance measurement differing from the first communication performance measurement by a threshold;

means for calculating a packet delay statistic for the first RAT; and

means for implementing, at a third time period, a coexistence management solution based at least in part on the determining and in part on the packet delay statistic, the third time period arriving after the first period time and the second time period, in which the coexistence management solution reduces interference to the first RAT from the second RAT.

8. The apparatus of claim 7 in which the first RAT comprises Bluetooth and the second RAT comprises Long Term Evolution (LTE).

9. The apparatus of claim 7 in which the coexistence management solution comprises power backoff.

10. The apparatus of claim 7 in which the coexistence management solution comprises frequency handover.

11. The apparatus of claim 7 in which the second RAT is operating during the second time period.

12. The apparatus of claim 7 in which the means for measuring the first communication performance during the first time period comprises means for measuring at least one of a packet error rate, slot error rate, received signal strength indicator (RSSI), header error check (HEC) error rate, a number of detected receive slots, a head of queue packet delay, or a number of flushes.

13. A computer program product for wireless communication in a wireless network, comprising:

a non-transitory computer-readable medium having non-transitory program code recorded thereon, the program code comprising;

program code to measure a first communication performance of a first radio access technology (RAT) of a user equipment during a first time period when a second RAT of the user equipment is not operating;

program code to measure a second communication performance of the first RAT during a second time period;

program code to compare the first communication performance measurement to the second communication performance measurement;

program code to determine that the second RAT is causing interference to the first RAT based on the second communication performance measurement differing from the first communication performance measurement by a threshold;

program code to calculate a packet delay statistic for the first RAT; and

program code to implement, at a third time period, a coexistence management solution based at least in part on the determining and in part on the packet delay statistic, the third time period arriving after the first time period and the second time period, in which the coexistence management solution reduces interference to the first RAT from the second RAT.

14. The computer program product of claim 13 in which the first RAT comprises Bluetooth and the second RAT comprises Long Term Evolution (LTE).

15. The computer program product of claim 13 in which the coexistence management solution comprises power backoff.

16. The computer program product of claim 13 in which the coexistence management solution comprises frequency handover.

17. The computer program product of claim 13 in which the second RAT is operating during the second time period.

18. The computer program product of claim 13 in which the program code to measure the first communication performance during the first time period comprises program code to measure at least one of a packet error rate, slot error rate, received signal strength indicator (RSSI), header error check (HEC) error rate, a number of detected receive slots, a head of queue packet delay, or a number of flushes.

19. An apparatus for wireless communication, comprising:

a memory; and

at least one processor coupled to the memory, the at least one processor being configured;

to measure a first communication performance of a first radio access technology (RAT) of a user equipment during a first time period when a second RAT of the user equipment is not operating;

to measure a second communication performance of the first RAT during a second time period;

to compare the first communication performance measurement to the second communication performance measurement;

to determine that the second RAT is causing interference to the first RAT based on the second communication performance measurement differing from the first communication performance measurement by a threshold;

to calculate a packet delay statistic for the first RAT; and

to implement, at a third time period, a coexistence management solution based at least in part on the determining and in part on the packet delay statistic, the third time period arriving after the first time period and the second time period, in which the coexistence management solution reduces interference to the first RAT from the second RAT.

20. The apparatus of claim 19 in which the first RAT comprises Bluetooth and the second RAT comprises Long Term Evolution (LTE).

21. The apparatus of claim 19 in which the coexistence management solution comprises power backoff.

22. The apparatus of claim 19 in which the coexistence management solution comprises frequency handover.

23. The apparatus of claim 19 in which the second RAT is operating during the second time period.

24. The apparatus of claim 19 in which the at least one processor configured to measure the first communication performance during the first time period comprises the at least one processor configured to measure at least one of a packet error rate, slot error rate, received signal strength indicator (RSSI), header error check (HEC) error rate, a number of detected receive slots, a head of queue packet delay, or a number of flushes.