Multi-radio coexistence

• US 9,832,785 B2
• Filed: 06/13/2016
• Issued: 11/28/2017
• Est. Priority Date: 09/22/2010
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Kadous, Tamer Adel, Dayal, Pranav, Mantravadi, Ashok, Gaal, Peter, Wang, Jibing
• Primary Examiner(s): LIAO, HSINCHUN
• Application Number:
  US15/181,316
• Publication Number:
  US 20160309494A1
• Time in Patent Office: 533 Days
• CPC Class Codes: H04W 52/243 taking into account interferences
• CPC Class Codes: H04W 72/1215 for collaboration of different radio technologies
• CPC Class Codes: H04W 72/542 using measured or perceived quality
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

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.

Claims

1. A method of wireless communication, comprising:

altering, at a user equipment (UE), a first channel measurement report by reducing a value of a channel quality indicator (CQI), the first channel measurement report being altered to create a communication gap in a first radio access technology (RAT), and the first channel measurement report transmitted before an OFF interval of the first RAT;

communicating, at the UE, using a second RAT during the created communication gap; and

transmitting, from the UE before an ON interval of the first RAT, a second channel measurement report indicating a correct value of the CQI.

2. The method of claim 1 in which the second RAT comprises an Industrial Scientific and Medical modem and the first RAT comprises a Long Term Evolution modem.

3. An apparatus for wireless communications, comprising:

means for altering, at a user equipment (UE), a first channel measurement report by reducing a value of a channel quality indicator (CQI), the first channel measurement report being altered to create a communication gap in a first radio access technology (RAT), and the first channel measurement report transmitted before an OFF interval of the first RAT;

means for communicating, at the UE, using a second RAT during the created communication gap; and

means for transmitting, from the UE before an ON interval of the first RAT, a second channel measurement report indicating a correct value of the CQI.

4. A non-transitory computer-readable medium having non-transitory program code recorded thereon for wireless communication, the non-transitory program code comprising:

program code to alter, at a user equipment (UE), a first channel measurement report by reducing a value of a channel quality indicator (CQI), the first channel measurement report being altered to create a communication gap in a first radio access technology (RAT), and the first channel measurement report transmitted before an OFF interval of the first RAT;

program code to communicate, at the UE, using a second RAT during the created communication gap; and

program code to transmit, from the UE before an ON interval of the first RAT, a second channel measurement report indicating a correct value of the CQI.

5. A user equipment (UE) 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 alter a first channel measurement report by reducing a value of a channel quality indicator (CQI), the first channel measurement report being altered to create a communication gap in a first radio access technology (RAT), and the first channel measurement report transmitted before an OFF interval of the first RAT;

to communicate using a second RAT during the created communication gap; and

to transmit, before an ON interval of the first RAT, a second channel measurement report indicating a correct value of the CQI.

6. The apparatus of claim 5 in which the second RAT comprises an Industrial Scientific and Medical modem and the first RAT comprises a Long Term Evolution modem.