Multi-radio coexistence

Patent metadata

Field	Value
Publication number	US-9398602-B2
Application number	US-201113229819-A
Country	US
Kind code	B2
Filing date	Sep 12, 2011
Priority date	Sep 22, 2010
Publication date	Jul 19, 2016
Grant date	Jul 19, 2016

Abstract

A method of wireless communication includes adjusting a channel quality indicator (CQI) to compensate for coexistence interference experienced between communication resources (such as an LTE radio and a Bluetooth radio). The CQI may be set to zero, falsely indicating to a serving enhanced NodeB that a UE is out of range, thereby creating a gap in LTE operation that may be used by an alternate radio access technology. To compensate for fluctuating interference, the CQI may be adjusted to incorporate average coexistence interference over a period of time. Alternatively, the CQI at a time may incorporate coexistence interference regardless of whether interference is experienced at that specific time. A CQI value may also be boosted to compensate for a CQI backoff. CQI may be adjusted to avoid a spiral of death effect.

First claim

What is claimed is:

1. A method of wireless communication, comprising:
measuring a channel quality of a first downlink channel received from a serving cell of a first radio access technology;
generating a channel measurement report based on the measured channel quality;
altering, based at least in part on interference from a radio of a second radio access technology, the channel measurement report to compensate for a predicted backoff applied by the serving cell to received channel measurement values;
reporting the altered channel measurement report to the serving cell; and
receiving a second downlink channel from the serving cell, the second downlink channel having a throughput rate based at least in part on the altered channel measurement report.

2. The method of claim 1 in which the altering the channel measurement report comprises altering the channel measurement report to include an average interference over a period of time.

3. The method of claim 1 in which the altering the channel measurement report comprises altering the channel measurement report to include a largest interference experienced over a period of time.

4. The method of claim 1 , in which the altering comprises increasing the channel measurement report to compensate for the backoff.

5. The method of claim 4 , in which the altering is based on the channel measurement report and a corresponding assigned rate.

6. The method of claim 1 in which the second radio access technology comprises an Industrial Scientific and Medical modem and the first radio access technology comprises a Long Term Evolution modem.

7. An apparatus for wireless communications, comprising:
means for measuring a channel quality of a first downlink channel received from a serving cell of a first radio access technology;
means for generating a channel measurement report based on the measured channel quality;
means for altering, based at least in part on interference from a radio of a second radio access technology, the channel measurement report to compensate for a predicted backoff applied by the serving cell to received channel measurement values;
means for reporting the altered channel measurement report to the serving cell; and
means for receiving a second downlink channel from the serving cell, the second downlink channel having a throughput rate based at least in part on the altered channel measurement report.

8. A non-transitory computer-readable medium having non-transitory program code recorded thereon, the non-transitory program code comprising:
program code to measure a channel quality of a first downlink channel received from a serving cell of a first radio access technology;
program code to generate a channel measurement report based on the measured channel quality;
program code to alter, based at least in part on interference from a radio of a second radio access technology, the channel measurement report to compensate for a predicted backoff applied by the serving cell to received channel measurement values;
program code to report the altered channel measurement report to the serving cell; and
program code to receive a second downlink channel from the serving cell, the second downlink channel having a throughput rate based at least in part on the altered channel measurement report.

9. An apparatus configured for wireless communication, the apparatus comprising:
a memory; and
at least one processor coupled to the memory, the at least one processor being configured:
to measure a channel quality of a first downlink channel received from a serving cell of a first radio access technology;
to generate a channel measurement report based on the measured channel quality,
to alter, based at least in part on interference from a radio of a second radio access technology, the channel measurement report to compensate for a predicted backoff applied by the serving cell to received channel measurement values;
to report the altered channel measurement report to the serving cell; and
to receive a second downlink channel from the serving cell, the second downlink channel having a throughput rate based at least in part on the altered channel measurement report.

10. The apparatus of claim 9 in which the at least one processor is further configured to alter the channel measurement report to include an average interference over a period of time.

11. The apparatus of claim 9 in which the at least one processor is further configured to alter the channel measurement report to include a largest interference experienced over a period of time.

12. The apparatus of claim 9 , in which the at least one processor is further configured to increase the channel measurement report to compensate for the backoff.

13. The apparatus of claim 12 , in which the increase is based on the channel measurement report and a corresponding assigned rate.

14. The apparatus of claim 9 in which the second radio access technology comprises an Industrial Scientific and Medical modem and the first radio access technology comprises a Long Term Evolution modem.

Assignees

• Kadous Tamer Adel
• Dayal Pranav
• Mantravadi Ashok
• Gaal Peter
• Wang Jibing
• Qualcomm Inc

Inventors

• Kadous Tamer Adel
• Dayal Pranav
• Mantravadi Ashok
• Gaal Peter
• Wang Jibing

Classifications

• H04W72/542

  using measured or perceived quality · CPC title

• H04W52/243

  taking into account interferences · CPC title

• H04W72/1215 Primary

  for collaboration of different radio technologies · CPC title

• H04W88/06 Primary

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title

• H04W24/10

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title