SYSTEMS AND METHODS FOR COEXISTENCE IN WLAN AND LTE COMMUNICATIONS

• US 20140274105A1
• Filed: 07/22/2013
• Published: 09/18/2014
• Est. Priority Date: 03/14/2013
• Status: Abandoned Application

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: WANG, Jibing
• Application Number:
  US13/947,935
• Publication Number:
  US 20140274105A1
• Time in Patent Office: Days
• US Class Current: 455/454
• CPC Class Codes: H04W 52/223 predicting future states of the transmission
• CPC Class Codes: H04W 52/241 taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
• CPC Class Codes: H04W 52/244 Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
• CPC Class Codes: H04W 52/38 TPC being performed in particular situations
• 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

This disclosure provides coexistence strategies for a combined wireless communications device using multiple wireless protocols, such as WLAN and LTE. Transmission power of a system using one wireless protocol is dynamically adjusted based on a determination of operating characteristics of a system using another wireless protocol. At least one of the operating characteristics may be determined from an allocation of network resources, examples of which include the transmission frequency for an upcoming transmission and the transmission power for an upcoming transmission. Further, the transmission power may be adjusted when the reception quality of the system using the other wireless protocol is below a desired threshold.

Claims

1. A wireless communications device, comprising:

a first transceiver configured to operate using a first wireless protocol;

a second transceiver configured to operate using a second wireless protocol; and

a coexistence manager configured to;

receive an allocation of network resources using the first transceiver;

predict intermodulation distortion (IMD) regarding an upcoming transmission using the first transceiver based, at least in part, on at least one characteristic determined from the allocation of network resources; and

selectively reduce transmit power at the second transceiver based, at least in part, on the predicted IMD when reception quality at the first receiver is below a desired threshold.

2. The wireless communications device of claim 1, wherein the at least one characteristic is a transmission frequency for the upcoming transmission;

3. The wireless communications device of claim 2, wherein the coexistence manager is further configured to:

determine a current channel on which the second transceiver is operating and predict IMD based, at least in part, on the transmission frequency of the upcoming transmission and the current channel.

4. The wireless communications device of claim 1, wherein the at least one characteristic is a transmission power for the upcoming transmission.

5. The wireless communications device of claim 3, wherein the coexistence manager to predict IMD based, at least in part, on the transmission frequency characteristic and the transmission power characteristic.

6. The wireless communications device of claim 1, wherein the allocation of network resources is a resource block (RB) assignment.

7. The wireless communications device of claim 1, wherein the coexistence manager to determine reception quality at the first receiver based, at least in part, on a performance metric reported by the second transceiver.

8. The wireless communications device of claim 1, wherein the coexistence manager to determine an amount by which to reduce transmission power for the second transceiver based, at least in part, on at least one of the reception quality at the first transceiver and the at least one characteristic determined from the allocation of network resources.

9. The wireless communications device of claim 1, wherein the first wireless protocol is a long term evolution (LTE) protocol and wherein the second wireless protocol is a wireless local area network (WLAN) protocol.

10. A method for providing coexistence between a first wireless protocol and a second wireless protocol, comprising:

receiving an allocation of network resources using the a first transceiver configured to operate using the first wireless protocol;

predicting intermodulation distortion (IMD) regarding an upcoming transmission at the first transceiver based, at least in part, on at least one characteristic determined from the allocation of network resources; and

selectively reducing transmit power at a second transceiver configured to operate using the second wireless protocol based, at least in part, on the predicted IMD when reception quality at the first receiver is below a desired threshold.

11. The method of claim 10, wherein the at least one characteristic is a transmission frequency for the upcoming transmission;

12. The method of claim 11, further comprising determining a current channel on which the second transceiver is operating and predicting IMD based, at least in part, on the transmission frequency of the upcoming transmission and the current channel.

13. The method of claim 10, wherein the at least one characteristic is a transmission power for the upcoming transmission.

14. The method of claim 13, wherein predicting IMD is based, at least in part, on the transmission frequency characteristic and the transmission power characteristic.

15. The method of claim 10, wherein the allocation of network resources is a resource block (RB) assignment.

16. The method of claim 10, wherein determining reception quality at the first receiver is based, at least in part, on a performance metric reported by the second transceiver.

17. The method of claim 10, further comprising determining an amount by which to reduce transmission power for the second transceiver based, at least in part, on at least one of the reception quality at the first transceiver and the at least one characteristic determined from the allocation of network resources.

18. The method of claim 10, wherein the first wireless protocol is a long term evolution (LTE) protocol and wherein the second wireless protocol is a wireless local area network (WLAN) protocol.

19. A non-transitory processor-readable storage medium for providing coexistence between a first wireless protocol and a second wireless protocol in a wireless communications device, the processor-readable storage medium having instructions thereon, when executed by a processor, to cause the wireless communications device to:

receive an allocation of network resources using the a first transceiver configured to operate using the first wireless protocol;

predict intermodulation distortion (IMD) regarding an upcoming transmission at the first transceiver based, at least in part, on at least one characteristic determined from the allocation of network resources; and

selectively reduce transmit power at a second transceiver configured to operate using the second wireless protocol based, at least in part, on the predicted IMD when reception quality at the first receiver is below a desired threshold.

20. The non-transitory processor-readable storage medium of claim 19, wherein the at least one characteristic is a transmission frequency for the upcoming transmission;

21. The non-transitory processor-readable storage medium of claim 20, further comprising instructions to cause the wireless communications device to determine a current channel on which the second transceiver is operating and predicting IMD based, at least in part, on the transmission frequency of the upcoming transmission and the current channel.

22. The non-transitory processor-readable storage medium of claim 19, wherein the at least one characteristic is a transmission power for the upcoming transmission.

23. The non-transitory processor-readable storage medium of claim 22, wherein predicting IMD is based, at least in part, on the transmission frequency characteristic and the transmission power characteristic.

24. The non-transitory processor-readable storage medium of claim 19, wherein the allocation of network resources is a resource block (RB) assignment.

25. The non-transitory processor-readable storage medium of claim 19, wherein determining reception quality at the first receiver is based, at least in part, on a performance metric reported by the second transceiver.

26. The non-transitory processor-readable storage medium of claim 19, further comprising instructions to cause the wireless communications device to determine an amount by which to reduce transmission power for the second transceiver based, at least in part, on at least one of the reception quality at the first transceiver and the at least one characteristic determined from the allocation of network resources.

27. The non-transitory processor-readable storage medium of claim 19, wherein the first wireless protocol is a long term evolution (LTE) protocol and wherein the second wireless protocol is a wireless local area network (WLAN) protocol.