Mitigating interference with wireless communications

Patent metadata

Field	Value
Publication number	US-9538436-B2
Application number	US-201414472758-A
Country	US
Kind code	B2
Filing date	Aug 29, 2014
Priority date	Aug 29, 2014
Publication date	Jan 3, 2017
Grant date	Jan 3, 2017

Abstract

An electronic device monitors a quality of a wireless connection between the electronic device and a first access point. Based on the monitoring and a collection of parameters relating to controlling handover between access points, a determination is made regarding whether the electronic device should be handed over to a second access point from the first access point, where the parameters differ for different combinations of the first access point and candidate destination access points for handover of the electronic device from the first access point.

First claim

What is claimed is:

1. A method of mitigating interference with wireless communications, comprising:
monitoring, by an electronic device, a quality of a first wireless connection between the electronic device and a first access point;
determining, by the electronic device based on the monitoring and a collection of parameters relating to controlling handover between access points, whether the electronic device should be handed over to a second access point from the first access point, wherein the parameters differ for different combinations of the first access point and candidate destination access points for handover of the electronic device from the first access point, wherein the collection of parameters includes threshold parameters relating to wireless connection quality thresholds usable for deciding whether the monitored quality of the first wireless connection should trigger a handover, and includes difference parameters specifying differences between a wireless connection quality of the first access point and respective minimum wireless connection qualities of the candidate destination access points, the difference parameters distinct from the threshold parameters, wherein the determining comprises determining that the electronic device is to be handed over to the second access point in response to detecting that the monitored quality of the first wireless connection is less than a first of the threshold parameters and exceeds a quality of a second wireless connection between the electronic device and the second access point by at least a value of a first of the difference parameters; and
triggering, by the electronic device based on the determining, handover of the electronic device from the first access point to the second access point.

2. The method of claim 1 , wherein the determining comprises:
using a first subset of the collection of parameters to decide whether the electronic device should be handed over from the first access point to the second access point, the first subset including the first threshold parameter and the first difference parameter; and
using a second subset of the collection of parameters to decide whether the electronic device should be handed over from the first access point to a third access point, the second subset including a second threshold parameter of the threshold parameters, and a second difference parameter of the difference parameters,
wherein the first subset of parameters differs from the second subset of parameters.

3. The method of claim 1 , further comprising setting the collection of parameters to use depending upon an access point that the electronic device is currently connected to, wherein different collections of parameters are set for different access points that the electronic device is currently connected to.

4. The method of claim 1 , wherein monitoring the quality of the first wireless connection comprises monitoring the quality of one or both of a downlink and an uplink between the electronic device and the first access point.

5. The method of claim 1 , wherein monitoring the quality of the first wireless connection comprises monitoring a wireless connection quality indicator selected from among a received signal strength indicator (RSSI), a number of retries, and a data rate.

6. The method of claim 1 , wherein the handover from the first access point to the second access point is to mitigate interference to wireless communications over the first wireless connection caused by an interference source.

7. The method of claim 6 , wherein the interference source includes one or more of a wireless communication component and a non-wireless communication component.

8. The method of claim 1 , wherein the handover from the first access point to the second access point is to mitigate interference to wireless communications over the first wireless connection caused by one or more of a plurality of types of interference sources.

9. The method of claim 8 , further comprising:
identifying, by the electronic device, which of the plurality of types of interference sources is interfering with the wireless communications; and
selecting, by the electronic device based on the identifying, the collection of parameters from among a plurality of collections of parameters, wherein the plurality of collections of parameters are provided for the respective plurality of types of interference sources.

10. The method of claim 1 , further comprising varying values of the parameters in the collection based on a transmit power of the electronic device.

11. An electronic device comprising:
a storage medium to store a collection of parameters relating to controlling handover between access points of a wireless network; and
at least one processor configured to:
monitor a quality of a first wireless connection between the electronic device and a first of the access points;
determine, based on the monitoring and the collection of parameters, whether the electronic device should be handed over to a second access point from the first access point, wherein the parameters differ for different combinations of the first access point and candidate destination access points for handover of the electronic device from the first access point, wherein the parameters for each combination of the first access point and a respective candidate destination access point include:
a respective wireless connection quality threshold usable for deciding whether the monitored quality of the first wireless connection should trigger a handover from the first access point to the respective candidate destination access point, and
a difference parameter specifying a difference between a wireless connection quality of the first access point and a minimum wireless connection quality of the respective candidate destination access point,

wherein the determining comprises determining that the electronic device is to be handed over to the second access point in response to detecting that the monitored quality of the first wireless connection is less than a first of the wireless connection quality thresholds and exceeds a quality of a second wireless connection between the electronic device and the second access point by at least a value of a first of the difference parameters; and
trigger, based on the determining, handover of the electronic device from the first access point to the second access point.

12. The electronic device of claim 11 , further comprising:
a first wireless communication component to communicate over the first wireless connection between the electronic device and the first access point; and
a second wireless communication component that is a potential interference source of wireless communications by the first wireless component over the first wireless connection.

13. The electronic device of claim 12 , further comprising:
a non-wireless communication component that is a potential interference source of wireless communications by the first wireless component over the first wireless connection.

14. The electronic device of claim 11 , wherein the parameters for a first combination of the first access point and a first candidate destination access point differ in value from the parameters for a second combination of the first access point and a second candidate destination access point.

15. The electronic device of claim 11 , wherein the handover from the first access point to the second access point is to mitigate interference to wireless communications over the first wireless connection caused by one or more of a plurality of types of interference sources.

16. The elect

Assignees

• Blackberry Ltd

Inventors

• Zhu Lizhong
• Lakhdhar Khaled
• Montemurro Michael Peter
• He Fei
• Zhou Qingmai
• Xu Jun
• Wang Dong
• Zhang Zongyou
• Hasan Mohammed Mahdi
• Zhu Libo
• Lambiri Cristian
• Hageltorn Goran
• Wu Yan
• Fischer Daniel

Classifications

• H04W36/0061

  of neighbour cell information · CPC title

• H04W36/0083

  Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists · CPC title

• H04W36/30

  by measured or perceived connection quality data · CPC title

• H04W36/0094 Primary

  Definition of hand-off measurement parameters · CPC title

• H04W36/304

  due to measured or perceived resources with higher communication quality · CPC title