Multi-radio coexistence

• US 9,226,173 B2
• Filed: 04/18/2013
• Issued: 12/29/2015
• Est. Priority Date: 04/18/2012
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sadek, Ahmed Kamel, Kadous, Tamer Adel, Dayal, Pranav, Mantravadi, Ashok
• Primary Examiner(s): Chu, Wutchung
• Application Number:
  US13/865,944
• Publication Number:
  US 20130279355A1
• Time in Patent Office: 985 Days
• Field of Search: 370/252, 370/294, 370/329, 370/328, 370/230, 370/332, 455/501
• US Class Current: 1/1
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 72/54 based on quality criteria
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A method for wireless communications includes determining a time division duplex (TDD) configuration of a non-serving network. The method also includes detecting interference from the non-serving network based at least in part on the TDD configuration of the non-serving network. The method further includes signaling an eNodeB of the interference based at least in part on the detecting.

Claims

1. A method for wireless communications, comprising:

determining a time division duplex (TDD) configuration of a non-serving network, the TDD configuration being received at a user equipment (UE) from a serving network or read by the UE from the non-serving network during a tune-away period of the UE;

measuring downlink quality for a first set of subframes without interference;

measuring downlink quality for a second set of subframes with interference, the first set of subframes and the second set of subframes being determined based on the TDD configuration of the non-serving network;

detecting interference from the non-serving network based at least in part on the downlink quality measured from the first set of subframes and the downlink quality measured from the second set of subframes; and

signaling the detected interference to an eNodeB when the UE fails to mitigate the detected interference.

2. The method of claim 1, in which the first set of subframes comprises subframes 0, 1, 5, or 6 of a Long Term Evolution (LTE) TDD configuration.

3. The method of claim 1, in which the second set of subframes comprises downlink subframes of a serving network that overlap with uplink subframes of the non-serving network.

4. The method of claim 1, in which the eNodeB is a serving eNodeB.

5. The method of claim 1, in which the eNodeB is a non-serving eNodeB and the signaling occurs as backhaul communications.

6. An apparatus configured for wireless communication, comprising:

means for determining a time division duplex (TDD) configuration of a non-serving network, the TDD configuration being received at a user equipment (UE) from a serving network or read by the UE from the non-serving network during a tune-away period of the UE;

means for measuring downlink quality for a first set of subframes without interference;

means for measuring downlink quality for a second set of subframes with interference, the first set of subframes and the second set of subframes being determined based on the TDD configuration of the non-serving network;

means for detecting interference from the non-serving network based at least in part on the downlink quality measured from the first set of subframes and the downlink quality measured from the second set of subframes; and

means for signaling the detected interference to an eNodeB when the UE fails to mitigate the detected interference.

7. A computer-readable medium having non-transitory program code recorded thereon, the non-transitory program code comprising:

program code to determine a time division duplex (TDD) configuration of a non-serving network, the TDD configuration being received at a user equipment (UE) from a serving network or read by the UE from the non-serving network during a tune-away period of the UE;

program code to measure downlink quality for a first set of subframes without interference;

program code to measure downlink quality for a second set of subframes with interference, the first set of subframes and the second set of subframes being determined based on the TDD configuration of the non-serving network;

program code to detect interference from the non-serving network based at least in part on the downlink quality measured from the first set of subframes and the downlink quality measured from the second set of subframes; and

program code to signal the detected interference to an eNodeB when the UE fails to mitigate the detected interference.

8. 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 determine a time division duplex (TDD) configuration of a non-serving network, the TDD configuration being received at a user equipment (UE) from a serving network or read by the UE from the non-serving network during a tune-away period of the UE;

to measure downlink quality for a first set of subframes without interference;

to measure downlink quality for a second set of subframes with interference, the first set of subframes and the second set of subframes being determined based on the TDD configuration of the non-serving network;

to detect interference from the non-serving network based at least in part on the downlink quality measured from the first set of subframes and the downlink quality measured from the second set of subframes; and

to signal the detected interference to an eNodeB when the UE fails to mitigate the detected interference.

9. The apparatus of claim 8, in which the first set of subframes comprises subframes 0, 1, 5, or 6 of a Long Term Evolution (LTE) TDD configuration.

10. The apparatus of claim 8, in which the second set of subframes comprises downlink subframes of a serving network that overlap with uplink subframes of the non-serving network.

11. The apparatus of claim 8, in which the eNodeB is a serving eNodeB.

12. The apparatus of claim 8, in which the eNodeB is a non-serving eNodeB and the signaling occurs as backhaul communications.

13. A method for wireless communications, comprising:

receiving, at an eNodeB of a serving network, an indication that a first user equipment (UE) served by the eNodeB is causing interference with communications of a non-serving network, the interference being detected by a second UE of the non-serving network based at least in part on both downlink quality measured on a first set of subframes without interference and downlink quality measured on a second set of subframes with interference, the first set of subframes and the second set of subframes being determined based on a TDD configuration of the serving network that is received at the second UE from the non-serving network or read by the second UE from the serving network during a tune-away period of the second UE, the indication being received when the second UE fails to mitigate the interference; and

adjusting communications of the first UE to reduce the interference.

14. The method of claim 13 in which the adjusting comprises at least scheduling the first UE on an edge of a channel away from a channel used by the non-serving network, reducing a size of a bandwidth assignment of the first UE, capping a maximum transmission power of the first UE, or a combination thereof.

15. The method of claim 14 in which the adjusting is only performed on uplink subframes of the first UE that overlap with downlink subframes of the non-serving network when a TDD configuration of the non-serving network is known.

16. An apparatus configured for wireless communication, comprising:

means for receiving, at an eNodeB of a serving network, an indication that a first user equipment (UE) served by the eNodeB is causing interference with communications of a non-serving network, the interference being detected by a second UE of the non-serving network based at least in part on both downlink quality measured on a first set of subframes without interference and downlink quality measured on a second set of subframes with interference, the first set of subframes and the second set of subframes being determined based on a TDD configuration of the serving network that is received at the second UE from the non-serving network or read by the second UE from the serving network during a tune-away period of the second UE, the indication being received when the second UE fails to mitigate the interference; and

means for adjusting communications of the first UE to reduce the interference.

17. A computer-readable medium having non-transitory program code recorded thereon, the non-transitory program code comprising:

program code to receive, at an eNodeB of a serving network, an indication that a first user equipment (UE) served by the eNodeB is causing interference with communications of a non-serving network, the interference being detected by a second UE of the non-serving network based at least in part on both downlink quality measured on a first set of subframes without interference and downlink quality measured on a second set of subframes with interference, the first set of subframes and the second set of subframes being determined based on a TDD configuration of the serving network that is received at the second UE from the non-serving network or read by the second UE from the serving network during a tune-away period of the second UE, the indication being received when the second UE fails to mitigate the interference; and

program code to adjust communications of the first UE to reduce the interference.

18. 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 receive, at an eNodeB of a serving network, an indication that a first user equipment (UE) served by the eNodeB is causing interference with communications of a non-serving network, the interference being detected by a second UE of the non-serving network based at least in part on both downlink quality measured on a first set of subframes without interference and downlink quality measured on a second set of subframes with interference, the first set of subframes and the second set of subframes being determined based on a TDD configuration of the serving network that is received at the second UE from the non-serving network or read by the second UE from the serving network during a tune-away period of the second UE, the indication being received when the second UE fails to mitigate the interference; and

to adjust communications of the first UE to reduce the interference.

19. The apparatus of claim 18 in which the at least one processor is further configured to perform at least scheduling the first UE on an edge of a channel away from a channel used by the non-serving network, reducing a size of a bandwidth assignment of the first UE, capping a maximum transmission power of the first UE, or a combination thereof.

20. The apparatus of claim 19 in which the at least one processor is further configured to only adjust uplink subframes of the first UE that overlap with downlink subframes of the non-serving network when a TDD configuration of the non-serving network is known.