METHOD AND DEVICE FOR WIRELESS NETWORK COEXISTENCE

• US 20150079975A1
• Filed: 09/19/2013
• Published: 03/19/2015
• Est. Priority Date: 09/19/2013
• Status: Active Grant

• Current Assignee: Malikie Innovations Limited (Key Patent Innovations Limited)
• Original Assignee: Blackberry Limited
• Inventors: Lambiri, Cristian, Hageltorn, Gran
• Granted Patent: US 9,894,675 B2
• Time in Patent Office: Days
• US Class Current: 455/426.1
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• 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 72/1215 for collaboration of different radio technologies

Abstract

A method and device are disclosed for transmission control based on conditions at a receiver. A condition for a received channel of a first wireless network when one or more transmitters for a second or additional wireless networks are transmitting is determined. A condition for the received channel when the transmitters of the second or additional wireless networks are not transmitting also is determined and the two conditions are compared. Depending on the comparison, transmission characteristics for the second wireless network may be modified to mitigate desensitization of the receiver due to the coexistence of transceivers for supporting multiple types of communication subsystems.

Claims

1. A method for receiving data in a first wireless network and transmitting data in at least a second wireless network, the method comprising:

determining a first condition for a received channel of a first wireless network when a transmitter for a second wireless network is transmitting;

determining a second condition for the received channel when the transmitter for the second wireless network is not transmitting;

comparing the first condition and the second condition; and

dependent on the comparison, modifying transmission characteristics for the transmitter for the second wireless network.

2. The method of claim 1 wherein determining the first condition for the received channel of the first wireless network further comprises determining the first condition when the transmitter for the second wireless network and a transmitter for the first wireless network are both transmitting.

3. The method of claim 2 wherein the transmitter for the second wireless network and the transmitter for the first wireless network both transmitting comprises a transmission event for the second wireless network and a transmission event for the first wireless network overlapping at least partially during a channel condition window.

4. The method of claim 3 wherein determining the second condition for the received channel when the transmitter for the second wireless network is not transmitting comprises determining the second condition at the receiver for the first wireless network when a transmission event for the second wireless network and a transmission event for the first wireless network do not overlap during a channel condition window.

5. The method of claim 1 wherein, in response to the comparison indicating that the first condition differs from the second condition by a first threshold, modifying transmission characteristics comprises at least one of reducing a transmission power and delaying a transmission event.

6. The method of claim 1 wherein, in response to the comparison indicating that the first condition differs from the second condition by less than the first threshold, modifying transmission characteristics comprises cancelling a reduction of transmission power.

7. The method of claim 1 wherein, in response to the comparison indicating that the first condition differs from the second condition by less than a second threshold, modifying transmission characteristics comprises increasing a transmission power.

8. The method of claim 1 wherein, in response to the comparison indicating that the first condition differs from the second condition by less than a second threshold, the transmission characteristics for the transmitter for the second wireless network are not modified.

9. The method of claim 1, wherein the first wireless network comprises a time division duplex (TDD) mode network.

10. The method of claim 2, wherein the first wireless network comprises frequency division duplex (FDD) mode network.

11. The method of claim 1 being implemented based on a determination that interference between a transmit channel of the first wireless network and a transmit channel of the second wireless network may impact the received channel.

12. The method of claim 1, wherein the first condition and the second condition comprise averages of selected samples of Channel Quality Indicators (CQI).

13. The method of claim 1, wherein the first wireless network comprises a wireless network based on long term evolution (LTE) standards and wherein the second wireless network comprises a wireless local area network (WLAN) based on IEEE 802.11 standards.

14. A wireless communications device comprising:

a first receiver and a first transmitter for connecting to a first wireless network;

a second transmitter for connecting to a second wireless network; and

a processor configured to;

determine a first condition for a received channel of the first wireless receiver when the second transmitter is transmitting;

determine a second condition for the received channel when the second transmitter is not transmitting;

compare the first condition and the second condition; and

based on the comparison, modify transmission characteristics for the second transmitter.

15. The wireless communications device of claim 14, wherein the processor is further configured to determine the first condition at the first receiver when both the second transmitter and the first transmitter are transmitting.

16. The wireless communications device of claim 14, wherein the processor is configured to, in response to the comparison indicating that the first condition differs from the second condition by a first threshold, modify transmission characteristics by at least one of reducing a transmission power and delaying a transmission event for the second transmitter.

17. The wireless communications device of claim 14, wherein the processor is further configured to, in response to the comparison indicating that the first condition differs from the second condition by less than the first threshold, modify transmission characteristics by cancelling a reduction of transmission power.

18. The wireless communications device of claim 14, wherein the processor is configured to determine the first condition and the second condition by filtered values of selected samples of channel quality indicators (CQI).

19. The wireless communications device of claim 14, wherein the first receiver and the first transmitter are configured to operate in a long term evolution (LTE) wireless network, and wherein the second transmitter is configured to operate in a IEEE 802.11 wireless local area network (WLAN).

20. A computer-readable storage medium in a wireless communications device, the medium having stored thereon computer-readable and computer-executable instructions, which, when executed, cause the wireless communications device to perform actions comprising:

determining a first condition for a received channel of a first wireless network when transmitter for a second wireless network is transmitting;

determining a second condition for the received channel when the transmitter for the second wireless network is not transmitting;

comparing the first condition and the second condition; and

based on the comparison, modifying transmission characteristics for the transmitter for the second wireless network.