System and method for managing communications for two networks in a communication device

Patent metadata

Field	Value
Publication number	US-9749878-B2
Application number	US-201313955442-A
Country	US
Kind code	B2
Filing date	Jul 31, 2013
Priority date	Jul 31, 2013
Publication date	Aug 29, 2017
Grant date	Aug 29, 2017

Abstract

A system, method and device for adjusting communication parameters for networks communicating with a communication device are provided. The method comprises: when the communication device is linked to a first communication network and a second communication network, comparing a strength of received signals from the second network against a threshold; and when the strength of the received signals is less than the threshold, adjusting a network parameter of signals received from the second communication network by the communication device.

First claim

The invention claimed is:

1. A method comprising:
in response to determining, at a communication device, that the communication device is linked to a first communication network and a second communication network:
measuring, at the communication device, a received signal strength indicator (RSSI) value of signals received from the second communication network;
determining, at the communication device, a data rate of the signals received from the second communication network;
selecting, at the communication device, a minimum required signal strength indicator value based on the determined data rate;
comparing, at the communication device, the RSSI value of the signals received from the second network against a threshold, wherein the threshold is determined based on the selected minimum required signal strength indicator value, a de-sense value due to an expected interference level from the first communication network, and an adjustment value related to operating conditions of the communication device; and,
when the RSSI value of the signals received from the second communication network is less than or equal to the threshold, adjusting, at the communication device, communication parameters that the communication device uses to communicate with one or more of the first communication network and the second communication network to mitigate co-interference between communications between the communication device and the first communication network and the signals received from second communication network;
repeating, at the communication device, measuring, determining, selecting, comparing, and adjusting until determining, at a communication device, that the communication device is no longer linked to the first communication network and the second communication network.

2. The method as claimed in claim 1 , further comprising:
when the RSSI value of the signals received from the second communication network is greater than the threshold, not adjusting, at the communication device, the network parameters of the communication device and not adjusting, at the communication device, transmission parameters of signals transmitted to the first communication network.

3. The method as claimed in claim 1 , wherein:
the first communication network is a cellular network; and
the second communication network is a WLAN communication network.

4. The method as claimed in claim 1 , wherein:
the first communication network is a cellular network; and
the second communication network utilizes an industrial, scientific and medical (ISM) communication band.

5. The method as claimed in claim 1 , wherein:
adjusting, at the communication device, the communication parameters comprises adjusting times when the signals received from the second communication network are monitored, utilizing a first time slot for processing the communications between the first communication network and the communication device and utilizing a second time slot for monitoring for the signals received from the second communication network, the second time slot not overlapping with the first time slot.

6. The method as claimed in claim 5 , wherein:
during the first time slot, the communication device does not monitor for the signals received from the second communication network.

7. The method as claimed in claim 1 , wherein:
the minimum required RSSI value for the signals received from the second communication network incorporates sensitivity data for a class of communication devices.

8. The method as claimed in claim 1 , wherein:
the de-sense value indicates a signal sensitivity level for the signals received from the second communication network due to interference of the first communication network.

9. The method as claimed in claim 1 , further comprising:
when the RSSI value of the signals received from the second communication network is greater than the threshold, lowering a transmission power of signals sent by the communication device to the second communication network.

10. The method as claimed in claim 9 , wherein:
the transmission power of signals sent by the communication device to the second communication network is lowered by a factor accounting to specific absorption rate (SAR) limits.

11. The method as claimed in claim 1 , wherein adjusting, at the communication device, the communication parameters that the communication device uses to communicate with one or more of the first communication network and the second communication network comprises one or more of:
changing a level of transmission power of signals sent by the communication device to the first communication network;
changing a transmission band used to receive the signals from the second communication network;
changing a channel parameter of signals sent by the communication device to the second communication network;
changing a frequency of signals sent by the communication device to the second communication network; and,
changing a level of transmission power of signals sent by the communication device to the second communication network.

12. A communication device comprising:
a communication subsystem comprising a receiver, a transmitter and one or more antennas configured to link with a first network and a second network; and
a processor operably coupled to the communication subsystem and configured to:
monitor for when the communication subsystem is linked to the first network and the second network;
in response to determining that the communication subsystem is linked to the first communication network and the second communication network:
measure a received signal strength indicator value (RSSI) and determine a data rate of signals received from the second network;
select a minimum required signal strength indicator value based on the determined data rate;
compare the RSSI value of the signals received from the second communication network against a threshold, wherein the threshold is determined based on the selected minimum required signal strength indicator value, a de-sense value due to an expected interference level from the first network, and an adjustment value related to operating conditions of the communication device; and
when the RSSI value of the signals received from the second communication network is less than or equal to the threshold, initiate an adjustment of communication parameters that the communication device uses to communicate with one or more of the first communication network and the second communication network to mitigate co-interference between communications between the communication device and the first communication network and the signals received from second communication network;
repeat measure, determine, select, compare, and adjust until the processor determines that the communication device is no longer linked to the first network and the second network.

13. The communication device as claimed in claim 12 , wherein the processor is further configured to:
when the RSSI value of the signals is greater than the threshold:
not adjust the network parameters of the communication device; and
not adjust transmission parameters of signals transmitted to the first communication network.

14. The communication device as claimed in claim 12 , wherein:
the processor is further configured to adjust the network parameters by adjusting times when the signals received from the second communication network are monitored, utilizing a first time slot for processing communications for the first communication network and a second time slot for monitoring for the signals received from the second communication network, the second time slot

Assignees

• Blackberry Ltd

Inventors

• Zhu Lizhong
• He Fei
• Wu Yan
• Zhou Qingmai
• Xu Jun
• Montemurro Michael Peter
• Zhang Zongyou

Classifications

• H04W52/367

  Power values between minimum and maximum limits, e.g. dynamic range · CPC title

• H04W52/244

  Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI] · CPC title

• H04W52/38

  TPC being performed in particular situations · CPC title

• H04W72/1215

  for collaboration of different radio technologies · CPC title

• H04W24/02 Primary

  Arrangements for optimising operational condition · CPC title