Mitigating cross-device interference

• US 9,143,957 B2
• Filed: 02/07/2013
• Issued: 09/22/2015
• Est. Priority Date: 02/24/2012
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sadek, Ahmed K., Kadous, Tamer Adel
• Primary Examiner(s): PHUONG, DAI
• Application Number:
  US13/762,107
• Publication Number:
  US 20130225149A1
• Time in Patent Office: 957 Days
• Field of Search: 455/61, 455/62, 455 631- 634, 455 67- 13, 455/69, 455/41.2, 455/42, 455/44, 455/501
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0002 by adapting the transmission rate
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 28/0231 based on communication conditions dynamic wireless traffic scheduling definition based on channel quality criteria H04W72/54
• CPC Class Codes: H04W 28/22 Negotiating communication rate
• CPC Class Codes: H04W 52/225 Calculation of statistics, e.g. average, variance
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 92/02 Inter-networking arrangements

Abstract

A device in a wireless system may determine when communications of a first radio access technology (RAT) experience interference from communications of a second RAT and may alter the communications of at least the first RAT or the second RAT to reduce the interference. In some instances, altering the communications include controlling a transmission rate to the second RAT based at least on a determined channel capacity.

Claims

1. A method of wireless communication, comprising:

determining when communications of a first device using a first radio access technology (RAT) experience interference from communications of a second device using a second RAT;

receiving, from the first device, information regarding a first channel quality when experiencing the interference, information regarding a second channel quality when not experiencing the interference, and a duty cycle of a length of time of the interference;

determining a channel capacity based on the information regarding the first and second channel quality and the duty cycle; and

altering the communications of the second device to reduce the interference, in which the altering comprises controlling a transmission rate to the second device based at least on the determined channel capacity.

2. The method of claim 1, further comprising:

setting a target number (M) of retransmissions; and

determining a code rate of a packet such that the packet is decoded by a user equipment (UE) at least at or before an Mth transmission of the packet.

3. The method of claim 1, further comprising restricting a bandwidth assignment of the second RAT to a part of a first channel of the second RAT farther away from a second channel of the first RAT when a transmission power of the second RAT exceeds a threshold.

4. The method of claim 1, further comprising determining a proximity of the first device to the second device.

5. The method of claim 4, in which the altering comprises altering the communications when the proximity is within a threshold.

6. The method of claim 1, in which the altering comprises altering an interference level that determines a total interference from one or more RATs.

7. The method of claim 6, in which altering the interference level comprises increasing the interference level via a first loop or decreasing the interference level via a second loop.

8. The method of claim 1, in which the altering is based at least in part on a result of performing an interference measurement to detect the interference.

9. The method of claim 1, in which the controlling the transmission rate comprises transmitting at a rate for the first channel quality when the duty cycle of the interference is less than or equal to a threshold and transmitting at a rate for the second channel quality when the duty cycle of the interference is greater than or equal to a threshold.

10. A non-transitory computer-readable medium having program code recorded thereon, the program code comprising:

program code to determine when communications of a first device using a first radio access technology (RAT) experience interference from communications of a second device using a second RAT;

program code to receive, from the first device, information regarding a first channel quality when experiencing the interference, information regarding a second channel quality when not experiencing the interference, and a duty cycle of a length of time of the interference;

program code to determine a channel capacity based on the information regarding the first and second channel quality and the duty cycle; and

program code to alter the communications of the second device to reduce the interference, in which the altering comprises controlling a transmission rate to the second device based at least on the determined channel capacity.

11. The non-transitory computer-readable medium of claim 10, further comprising program code to restrict a bandwidth assignment of the second RAT to a part of a first channel of the second RAT farther away from a second channel of the first RAT when a transmission power of the second RAT exceeds a threshold.

12. The non-transitory computer-readable medium of claim 10, in which the program code further comprises program code to determine a proximity of the first device to the second device, and in which the program code to alter comprises program code to alter the communications when the proximity is within a threshold.

13. The non-transitory computer-readable medium of claim 10, in which the program code to control the transmission rate comprises program code to transmit at a rate for the first channel quality when the duty cycle of the interference is less than or equal to a threshold and transmit at a rate for the second channel quality when the duty cycle of the interference is greater than or equal to a threshold.

14. 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 determine when communications of a first device using a first radio access technology (RAT) experience interference from communications of a second device using a second RAT;

to receive, from the first device, information regarding a first channel quality when experiencing the interference, information regarding a second channel quality when not experiencing the interference, and a duty cycle of a length of time of the interference;

to determine a channel capacity based on the information regarding the first and second channel quality and the duty cycle; and

to alter the communications of the second device to reduce the interference, in which the altering comprises controlling a transmission rate to the second device based at least on the determined channel capacity.

15. The apparatus of claim 14, in which the at least one processor is further configured to restrict a bandwidth assignment of the second RAT to a part of a first channel of the second RAT farther away from a second channel of the first RAT when a transmission power of the second RAT exceeds a threshold.

16. The apparatus of claim 14, in which the at least one processor is further configured to determine a proximity of the first device to the second device, and in which the at least one processor is further configured to alter the communications by altering the communications when the proximity is within a threshold.

17. The apparatus of claim 14, in which the at least one processor is further configured to alter the communications by altering an interference level that determines a total interference from one or more RATs.

18. The apparatus of claim 17, in which the at least one processor is further configured to alter the interference level by increasing the interference level via a first loop or decreasing the interference level via a second loop.

19. The apparatus of claim 14, in which the at least one processor is further configured to alter the communications based at least in part on a result of performing an interference measurement to detect the interference.

20. The apparatus of claim 14, in which the at least one processor is further configured to control the transmission rate by transmitting at a rate for the first channel quality when the duty cycle of the interference is less than or equal to a threshold and transmitting at a rate for the second channel quality when the duty cycle of the interference is greater than or equal to a threshold.

21. An apparatus for wireless communication, comprising:

means for determining when communications of a first device using a first radio access technology (RAT) experience interference from communications of a second device using a second RAT;

means for receiving, from the first device, information regarding a first channel quality when experiencing the interference, information regarding a second channel quality when not experiencing the interference, and a duty cycle of a length of time of the interference;

means for determining a channel capacity based on the information regarding the first and second channel quality and the duty cycle; and

means for altering the communications of the second device to reduce the interference, in which the altering comprises controlling a transmission rate to the second device based at least on the determined channel capacity.

22. The apparatus of claim 21, further comprising means for restricting a bandwidth assignment of the second RAT to a part of a first channel of the second RAT farther away from a second channel of the first RAT when a transmission power of the second RAT exceeds a threshold.

23. The apparatus of claim 21, further comprising means for determining a proximity of the first device to the second device, and in which the altering means further comprises means for altering the communications when the proximity is within a threshold.

24. The apparatus of claim 21, in which the controlling the transmission rate comprises transmitting at a rate for the first channel quality when the duty cycle of the interference is less than or equal to a threshold and transmitting at a rate for the second channel quality when the duty cycle of the interference is greater than or equal to a threshold.