Techniques for mitigating cross device co-existence interference

Patent metadata

Field	Value
Publication number	US-2016337047-A1
Application number	US-201615077316-A
Country	US
Kind code	A1
Filing date	Mar 22, 2016
Priority date	May 12, 2015
Publication date	Nov 17, 2016
Grant date	—

Abstract

The disclosure provides techniques for reducing interference caused by a first device to a second device receiving a satellite-based positioning signal. A device such as a user equipment (UE) or base station (eNB) determines a threshold transmission power for a transmission frequency of the device. The device also determines a signal strength of the satellite-based positioning system signal at the device. The device then controls a transmission property of the device based on the signal strength of the satellite-based positioning system signal when a transmission power of the device at the transmission frequency satisfies the threshold. The device may also determine that reception of the satellite-based positioning system signal by the second device is likely to be affected by a transmission from the device at a transmission power that satisfies the threshold and control the transmission property when reception of the satellite-based positioning system signal is likely to be affected.

First claim

What is claimed is:

1 . A method of reducing interference caused by a first device, comprising:
determining a threshold transmission power for a transmission frequency of the first device; determining a signal strength of a satellite-based positioning system signal received at the first device; and controlling a transmission property of the first device based on the signal strength of the satellite-based positioning system signal received at the first device when a transmission power of the first device at the transmission frequency satisfies the threshold transmission power.

2 . The method of claim 1 , further comprising determining that reception of the satellite-based positioning system signal by a second device is likely to be affected by a transmission from the first device at the transmission power that satisfies the threshold transmission power, wherein controlling the transmission property is further based on the determination that reception of the satellite-based positioning system signal by the second device is likely to be affected by the transmission from the first device.

3 . The method of claim 2 , wherein determining that reception of the satellite-based positioning system signal by the second device is likely to be affected by the transmission from the first device comprises determining that the first device is a fast moving user equipment.

4 . The method of claim 1 , wherein controlling the transmission property of the first device based on the signal strength of the satellite-based positioning system signal comprises setting a maximum transmission power for the first device based on the signal strength of the satellite-based positioning system signal.

5 . The method of claim 4 , further comprising:
determining that the maximum transmission power limits throughput for the first device; determining at least one critical service of the first device; and restricting transmissions from the first device to transmissions for the at least one critical service.

6 . The method of claim 4 , further comprising:
determining that the maximum transmission power is insufficient to maintain current data service requirements, that the maximum transmission power is insufficient to maintain an association with a current cell, or any combination thereof; and changing to a different cell that uses a different transmission frequency with a second separation from a frequency band used by the satellite-based positioning system signal, the second separation being greater than a first separation between the transmission frequency of the first device and the frequency band used by the satellite-based positioning system signal.

7 . The method of claim 2 , wherein:
the first device is a small cell, and determining that reception of the satellite-based positioning system signal by the second device is likely to be affected by the transmission from the first device comprises determining that a coverage area of the small cell includes an outdoor area.

8 . The method of claim 7 , wherein determining that the coverage area of the small cell includes the outdoor area includes determining that the signal strength of the satellite-based positioning system signal received at the small cell satisfies a threshold, that a signal strength of a macro base station signal received at the small cell satisfies a threshold, or any combination thereof.

9 . The method of claim 7 , wherein controlling the transmission property of the first device based on the signal strength of the satellite-based positioning system signal comprises performing transmission power management of the small cell based on the signal strength of the satellite-based positioning system signal.

10 . The method of claim 7 , wherein controlling the transmission property of the first device based on the signal strength of the satellite-based positioning system signal comprises reducing a bandwidth centered at the transmission frequency utilized by the first device.

11 . The method of claim 1 , wherein determining the threshold transmission power for the transmission frequency of the first device comprises determining the threshold transmission power based on a first separation between the transmission frequency of the first device and a frequency band used by the satellite-based positioning system signal.

12 . An apparatus for reducing interference caused by a first device, comprising:
a transceiver; a memory configured to store instructions; and a processor communicatively coupled to the transceiver and the memory, the processor configured to execute the instructions to: determine a threshold transmission power for a transmission frequency of the first device; determine a signal strength of a satellite-based positioning system signal received at the first device via the transceiver; and control a transmission property of the first device based on the signal strength of the satellite-based positioning system signal received at the first device when a transmission power of the first device at the transmission frequency satisfies the threshold transmission power.

13 . The apparatus of claim 12 , wherein the processor is configured to:
determine that reception of the satellite-based positioning system signal by a second device is likely to be affected by a transmission from the first device at the transmission power that satisfies the threshold transmission power; and control the transmission property of the first device when reception of the satellite-based positioning system signal by the second device is likely to be affected.

14 . The apparatus of claim 13 , wherein the processor is configured to determine that reception of the satellite-based positioning system signal by the second device is likely to be affected by the transmission from the first device based on determining that the first device is a fast moving user equipment.

15 . The apparatus of claim 12 , wherein the processor is configured to set a maximum transmission power for the first device based on the signal strength of the satellite-based positioning system signal received at the first device.

16 . The apparatus of claim 15 , wherein the processor is configured to:
determine that the maximum transmission power limits throughput for the first device; determine at least one critical service of the first device; and restrict transmissions from the first device to transmissions for the at least one critical service.

17 . The apparatus of claim 15 , wherein the processor is configured to:
determine that the maximum transmission power is insufficient to maintain current data service requirements, that the maximum transmission power is insufficient to maintain an association with a current cell, or a combination thereof; and change to a different cell that uses a different transmission frequency with a second separation from a frequency band used by the satellite-based positioning system signal, the second separation being greater than a first separation between the transmission frequency of the first device and the frequency band used by the satellite-based positioning system signal.

18 . The apparatus of claim 13 , wherein:
the first device is a small cell, and the processor is configured to determine that reception of the satellite-based positioning system signal by the second device is likely to be affected by the transmission from the first device based on determining that a coverage area of the small cell includes an outdoor area.

19 . The apparatus of claim 18 , whe

Assignees

• Qualcomm Inc

Inventors

• Khoshnevisan Mostafa
• Patel Chirag Sureshbhai
• Yavuz Mehmet
• Sadek Ahmed Kamel

Classifications

• H04B17/318

  Received signal strength · CPC title

• H04W88/02

  Terminal devices · CPC title

• H04B10/118

  specially adapted for satellite communication · CPC title

• H04W40/08

  based on transmission power · CPC title

• H04W16/32

  Hierarchical cell structures · CPC title