MITIGATING CROSS-DEVICE INTERFERENCE

• US 20130225149A1
• Filed: 02/07/2013
• Published: 08/29/2013
• Est. Priority Date: 02/24/2012
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sadek, Ahmed K., Kadous, Tamer Adel
• Granted Patent: US 9,143,957 B2
• Time in Patent Office: Days
• US Class Current: 455/418
• 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 radio access technology (RAT) experience interference from communications of a second RAT; and

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

2. The method of claim 1, further comprising:

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

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

3. The method of claim 2, 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.

4. The method of claim 1, in which the altering comprises 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.

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

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

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

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

9. 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.

10. A computer program product for wireless communications, the computer program product comprising:

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

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

program code to alter the communications of at least the first RAT or the second RAT to reduce the interference, in which the program code to alter comprises program code to control a transmission rate to the first RAT based at least on a determined channel capacity.

11. The computer program product of claim 10, in which program code further comprises:

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

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

12. The computer program product of claim 10, in which program code to alter comprises 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.

13. The computer program product of claim 10, the program code further comprising program code to determine a proximity of the first RAT to the second RAT, and in which the program code to alter comprises program code to alter the communications when the proximity is within 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 radio access technology (RAT) experience interference from communications of a second RAT; and

to alter the communications of at least the first RAT or the second RAT to reduce the interference, in which the at least one processor configured to alter comprises the at least one processor configured to control a transmission rate to the first RAT based at least on a determined channel capacity.

15. The apparatus of claim 14, in which the at least one processor is further configured:

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

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

16. The apparatus of claim 14, in which the at least one processor is further configured to alter the communications by 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.

17. The apparatus of claim 14, in which the at least one processor is further configured to determine a proximity of the first RAT to the second RAT, 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.

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

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

20. 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.

21. An apparatus for wireless communication, comprising:

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

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

22. The apparatus of claim 21, further comprising:

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

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

23. The apparatus of claim 21, in which the altering means comprises 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.

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