NETWORK ASSISTED INTERFERENCE CANCELLATION/SUPPRESSION FOR MULTIPLE SERVICES

• US 20140301268A1
• Filed: 04/03/2014
• Published: 10/09/2014
• Est. Priority Date: 04/04/2013
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: XU, Hao, LUO, Tao, CHEN, Wanshi, GAAL, Peter, YOO, Taesang, WEI, Yongbin, MALLADI, Durga Prasad, JI, Tingfang
• Granted Patent: US 9,723,497 B2
• Time in Patent Office: Days
• US Class Current: 370/312
• CPC Class Codes: H04B 1/7103 the interference being multiple access interference
• CPC Class Codes: H04J 11/005 of intercell interference
• CPC Class Codes: H04L 5/0053 Allocation of signaling, i.e. of overhead other than pilot signals
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

Certain aspects of the present disclosure relate to methods and apparatus for network assisted interference cancellation (IC) and interference suppression (IS) for multiple services. According to aspects a user equipment (UE) may determine information regarding system parameters for one or more types of communications services used to transmit potentially interfering signals in one or more neighbor cells, wherein a type of the information determined depends on the type of communications service. The UE may perform interference management using the determined information to cancel or suppress interference caused by the potentially interfering signals.

Claims

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

determining information regarding system parameters for one or more types of communications services used to transmit potentially interfering signals in one or more neighbor cells, wherein a type of the information determined depends on the type of communications service; and

performing interference management using the determined information to cancel or suppress interference caused by the potentially interfering signals.

2. The method of claim 1, wherein performing interference management using the determined information comprises:

detecting interfering signals from the one or more neighbor cells based on the determined information; and

processing transmissions from a serving base station based on the detected interfering signals.

3. The method of claim 1, wherein:

the one or more types of communications services comprise at least two of Unicast transmissions, Broadcast transmissions, Multicast transmissions, Machine Type Communications (MTC) transmissions, and positioning reference signal (PRS) transmissions; and

interference management is performed differently for at least two of the communications services.

4. The method of claim 1, wherein the one or more types of communications services comprise at least one of machine type communications (MTC) services for communicating with low rate devices and MTC services for communicating with extended coverage devices.

5. The method of claim 4, wherein the determining comprises receiving signaling indicating at least one of:

whether MTC operation is supported by one or more neighbor cells;

a bandwidth of MTC operation;

a location of frequency resources used for MTC operation;

subframes used for MTC transmissions;

periodicity of MTC transmissions;

or

a level of bundling for one or more types of MTC transmissions.

6. The method of claim 4, further comprising receiving an indication of one or more subframes for which interference management should not be performed.

7. The method of claim 4, wherein performing interference management comprises:

performing blind detection of interfering MTC transmissions; and

processing transmissions from the serving base station based on the detected interfering transmissions.

8. The method of claim 1, wherein the one or more types of communications services comprise Multimedia Broadcast Single Frequency Network (MBSFN) services.

9. The method of claim 8, wherein the determining comprises at least one of:

receiving signaling of MBSFN subframe configurations for one or more neighbor cells;

or

receiving signaling of Multimedia Broadcast and Multicast Service (MBMS) related configuration relative to demodulation reference signal (DMRS)-based unicast transmissions for MBSFN subframes.

10. The method of claim 1, wherein the one or more types of communications services comprise positioning services using positioning reference signals (PRS).

11. The method of claim 10, wherein the determining comprises:

receiving signaling of a PRS configuration for one or more neighbor cells.

12. The method of claim 10, wherein performing interference management comprises:

performing blind detection of PRS transmissions; and

processing transmissions from a serving base station based on the detected interfering transmissions.

13. The method of claim 1, wherein the determining comprises:

receiving signaling indicating at least one of subbands or subframe subsets where interference management should not be applied.

14. The method of claim 13, wherein the signaling comprises at least one of broadcast signaling, multi-cast signaling, radio resource control (RRC) signaling, or dynamic signaling.

15. The method of claim 1, further comprising:

signaling interference cancellation capabilities of the UE including at least one of detected signals, signals canceled by the UE, or one or more hypotheses used by the UE in an effort to detect a known signal.

16. A method for wireless communication by a base station (BS), comprising:

determining information regarding system parameters for one or more types of communications services used to transmit potentially interfering signals in one or more neighbor cells, wherein a type of the information determined depends on the type of communications service; and

transmitting signaling to one or more user equipments (UEs) to assist in performing interference management using the determined information to cancel or suppress interference caused by the potentially interfering signals.

17. The method of claim 16, wherein:

the one or more types of communications services comprise at least two of Unicast transmissions, Broadcast transmissions, Multicast transmissions, Machine Type Communications (MTC) transmissions, and positioning reference signal (PRS) transmissions.

18. The method of claim 16, wherein the one or more types of communications services comprise at least one of machine type communications (MTC) services for communicating with low rate devices and MTC services for communicating with extended coverage devices.

19. The method of claim 18, wherein the transmitting comprises transmitting signaling indicating at least one of:

whether MTC operation is supported by one or more neighbor cells;

a bandwidth of MTC operation;

a location of frequency resources used for MTC operation;

subframes used for MTC transmissions;

periodicity of MTC transmissions;

or

a level of bundling for one or more types of MTC transmissions.

20. The method of claim 18, further comprising transmitting an indication of one or more subframes for which interference management should not be performed.

21. The method of claim 16, wherein the one or more types of communications services comprise Multimedia Broadcast Single Frequency Network (MBSFN) services.

22. The method of claim 21, wherein the transmitting comprises at least one of:

transmitting signaling of MBSFN subframe configurations for one or more neighbor cells;

or

transmitting signaling of Multimedia Broadcast and Multicast Service (MBMS) related configuration relative to demodulation reference signal (DMRS)-based unicast transmissions for MBSFN subframes.

23. The method of claim 16, wherein the one or more types of communications services comprise positioning services using positioning reference signals (PRS).

24. The method of claim 16, wherein the transmitting comprises:

transmitting signaling indicating at least one of subbands or subframe subsets where interference management should not be applied.

25. The method of claim 24, wherein the signaling comprises at least one of broadcast signaling, multi-cast signaling, radio resource control (RRC) signaling, or dynamic signaling.

26. The method of claim 16, further comprising:

exchanging signaling with the one or more neighbor cells including at least one of a MTC configuration, positioning reference signal (PRS) configuration, Multimedia Broadcast Single Frequency Network (MBSFN) configuration, or time divisional duplex (TDD) subframe configuration.

27. The method of claim 16, wherein determining information regarding system parameters for one or more types of communications services used to transmit potentially interfering signals in one or more neighbor cells comprises:

receiving interference cancellation capabilities from a UE of the one or more UEs, wherein the interference cancellation capabilities includes at least one of signals detected by the UE, signals canceled by the UE, or one or more hypotheses used by the UE in an effort to detect a known signal.

28. The method of claim 27, further comprising:

scheduling the UE based on the received interference cancellation capabilities.

29. An apparatus for wireless communication, comprising:

means for determining information regarding system parameters for one or more types of communications services used to transmit potentially interfering signals in one or more neighbor cells, wherein a type of the information determined depends on the type of communications service; and

means for performing interference management using the determined information to cancel or suppress interference caused by the potentially interfering signals.

30. An apparatus for wireless communication, comprising:

means for determining information regarding system parameters for one or more types of communications services used to transmit potentially interfering signals in one or more neighbor cells, wherein a type of the information determined depends on the type of communications service; and

means for transmitting signaling to one or more user equipments (UEs) to assist in performing interference management using the determined information to cancel or suppress interference caused by the potentially interfering signals.