UE ASSISTED INTERFERENCE LEARNING

• US 20160099794A1
• Filed: 09/25/2015
• Published: 04/07/2016
• Est. Priority Date: 10/03/2014
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: CHENDAMARAI KANNAN, Arumugam, LUO, Tao, WEI, Yongbin, MALLADI, Durga Prasad
• Granted Patent: US 10,425,187 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/0035 evaluation of received explicit signalling
• CPC Class Codes: H04W 16/14 Spectrum sharing arrangements between different networks
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 74/0808 using carrier sensing, e.g. carrier sense multiple access [CSMA]
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

In an unlicensed band, different types of interference may be experienced by user equipments (UEs), and a serving evolved Node B (eNB) may not be aware of the interference types affecting a UE. Therefore, aspects presented herein provide UE assisted interference learning, in which the UE detects an interfering signal and reports information such as the interference level and properties of the interfering signal to a serving eNB. Another aspects presented herein provide for an eNB which receives, from one or more UEs, information indicating properties of each of at least one interfering signals experienced by the UEs, such as interference types affecting the UEs. The eNB further uses the information received from the UE, including the wireless technology type to determine the properties of its downlink transmission and the length of the contention window leading up to its downlink transmission.

Claims

1. A method of wireless communication of a user equipment (UE), comprising:

detecting at least one interfering signal;

determining properties of the at least one interfering signal, the properties including at least a type of wireless technology; and

transmitting information indicating the properties of each of the at least one interfering signal to a serving evolved Node B (eNB).

2. The method of claim 1, wherein the properties of the at least one interfering signal comprise information regarding the type of wireless technology.

3. The method of claim 1, wherein the transmitted information further indicates at least one of a strength of each of the at least one interfering signal, a periodicity of each of the at least one interfering signal, a bandwidth of each of the at least one interfering signal, or a frequency of each of the at least one interfering signal.

4. The method of claim 1, further comprising receiving a downlink assignment for a downlink transmission from the serving eNB, wherein the downlink assignment is based, at least in part, on the transmitted information.

5. The method of claim 1, further comprising receiving a configuration for measuring interference, the configuration being based on the transmitted information.

6. The method of claim 5, wherein the configuration for measuring interference is received in a radio resource control (RRC) message indicating interference measurement resources.

7. The method of claim 1, further comprising:

receiving a downlink transmission from the serving eNB; and

processing the downlink transmission based on the determined properties for each of the at least one interfering signal.

8. The method of claim 1, further comprising:

receiving a downlink signal, the downlink signal comprising a downlink transmission from the serving eNB and the at least one interfering signal; and

mitigating interference of the at least one interfering signal from the downlink transmission based on the determined properties for each of the at least one interfering signal.

9. An apparatus for wireless communication, comprising:

a memory; and

at least one processor coupled to the memory and configured to;

detect at least one interfering signal;

determine properties of the at least one interfering signal, the properties including at least a type of wireless technology; and

transmit information indicating the properties of each of the at least one interfering signal to a serving evolved Node B (eNB).

10. The apparatus of claim 9, wherein the properties of the at least one interfering signal comprise information regarding the type of wireless technology.

11. The apparatus of claim 9, wherein the transmitted information further indicates at least one of a strength of each of the at least one interfering signal, a periodicity of each of the at least one interfering signal, a bandwidth of each of the at least one interfering signal, or a frequency of each of the at least one interfering signal.

12. The apparatus of claim 9, wherein the at least one processor is further configured to receive a downlink assignment for a downlink transmission from the serving eNB, wherein the downlink assignment is based, at least in part, on the transmitted information.

13. The apparatus of claim 9, wherein the at least one processor is further configured to receive a configuration for measuring interference, the configuration being based on the transmitted information.

14. The apparatus of claim 13, wherein the at least one processor is further configured to receive the configuration for measuring interference in a radio resource control (RRC) message indicating interference measurement resources.

15. The apparatus of claim 9, wherein the at least one processor is further configured to:

receive a downlink transmission from the serving eNB; and

process the downlink transmission based on the determined properties for each of the at least one interfering signal.

16. The apparatus of claim 9, wherein the at least one processor is further configured to:

receive a downlink signal, the downlink signal comprising a downlink transmission from the serving eNB and the at least one interfering signal; and

mitigate interference of the at least one interfering signal from the downlink transmission based on the determined properties for each of the at least one interfering signal.

17. A method of wireless communication of an evolved Node B (eNB), comprising:

receiving, from a user equipment (UE), information indicating properties of each of at least one interfering signal of the UE, the properties including at least a type of wireless technology; and

sending information to the UE based, at least in part, on the received information indicating the properties of each of the at least one interfering signal.

18. The method of claim 17, wherein the sent information comprises downlink assignment for a downlink transmission to mitigate the at least one interfering signal.

19. The method of claim 17, wherein the sent information comprises a configuration for interference measurements by the UE.

20. The method of claim 17, wherein the at least one interfering signal is unknown to the eNB.

21. The method of claim 17, wherein the at least one interfering signal comprises an LTE-Unlicensed signal.

22. The method of claim 17, wherein the at least one interfering signal comprises a Wi-Fi signal.

23. The method of claim 17, further comprising, adjusting a contention window of a downlink transmission based, at least in part, on the received information indicating the properties of each of the at least one interfering signal.

24. An apparatus for wireless communication, comprising:

a memory; and

at least one processor coupled to the memory and configured to;

receive, from a user equipment (UE), information indicating properties of each of at least one interfering signal of the UE, the properties including at least a type of wireless technology; and

send information to the UE based on the received information indicating the properties of each of the at least one interfering signal.

25. The apparatus of claim 24, wherein the sent information comprises downlink assignment for a downlink transmission to mitigate at least one interfering signal.

26. The apparatus of claim 24, wherein the sent information comprises a configuration for interference measurements by the UE.

27. The apparatus of claim 24, wherein the at least one interfering signal is unknown to the apparatus.

28. The apparatus of claim 24, wherein the at least one interfering signal comprises an LTE-Unlicensed signal.

29. The apparatus of claim 24, wherein the at least one interfering signal comprises a Wi-Fi signal.

30. The apparatus of claim 24, wherein the at least one processor is further configured to adjust a contention window of a downlink transmission based, at least in part, on the received information indicating the properties of each of the at least one interfering signal.