INTER-UE INTERFERENCE CANCELLATION

• US 20140036801A1
• Filed: 07/16/2013
• Published: 02/06/2014
• Est. Priority Date: 08/03/2012
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: MALLADI, Durga Prasad, WEI, Yongbin
• Granted Patent: US 9,544,082 B2
• Time in Patent Office: Days
• US Class Current: 370/329
• CPC Class Codes: H04B 1/7097 Interference-related aspects
• CPC Class Codes: H04J 11/0023 Interference mitigation or co-ordination direct sequence spread spectrum [DSSS] systems H04B1/7097; frequency hopping H04B1/713; allocation criteria for ingress interference avoidance H04L5/0062; frequency allocation criteria for requirements on out-of-channel emissions H04L5/0066; arrangements for removing intersymbol interference or baseband equalisers H04L25/03006; peak power aspects in multicarrier modulation H04L27/2614; power management H04W52/00; traffic scheduling H04W72/54, H04W72/541
• CPC Class Codes: H04J 11/005 of intercell interference
• CPC Class Codes: H04J 11/0059 Out-of-cell user aspects
• CPC Class Codes: H04L 5/0032 Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
• CPC Class Codes: H04L 5/14 Two-way operation using the same type of signal, i.e. duplex
• CPC Class Codes: H04W 72/0446 Resources in time domain, e.g. slots or frames
• CPC Class Codes: H04W 72/51 based on terminal or device properties
• CPC Class Codes: H04W 72/541 using the level of interference

Abstract

Interference cancellation occurs for devices, where the source of the interference is another UE. The victim UE receiver identifies subframes vulnerable to potential interference from other UEs. Candidate resource blocks in the identified vulnerable subframes are listed. Interference is cancelled for edge resource blocks and valid contiguous resource blocks.

Claims

1. A method of wireless communication, comprising:

reading system information from a neighboring cell to identify a neighboring time domain resource allocation;

identifying at least one candidate resource based on a comparison of the neighboring time domain resource allocation and a serving cell time domain resource allocation;

identifying at least one interfered resource by detecting uplink interference on one or more resource, from the at least one candidate resource, based on a criteria; and

performing interference cancellation on the at least one interfered resource.

2. The method of claim 1, in which the neighboring time domain resource allocation and serving cell time domain resource allocation are subframe allocation configurations.

3. The method of claim 2, in which the subframe allocation configurations are one of:

time division duplex (TDD) subframe configurations;

or

device-to-device (D2D) subframe configurations.

4. The method of claim 3, in which the subframe allocation configurations are TDD configurations and the at least one candidate resource comprises at least subframe on which the neighboring time domain resource allocation includes an uplink subframe and the serving cell time domain resource allocation includes a downlink subframe.

5. The method of claim 3, in which the subframe allocation configurations are D2D configurations and the at least one candidate resource comprises at least subframe on which the neighboring time domain resource allocation includes a D2D subframe and the serving cell time domain resource allocation includes a wide area network (WAN) subframe.

6. The method of claim 1, in which the neighboring time domain resource allocation and the serving cell time domain resource allocation are allocated different transmission types.

7. The method of claim 6, in which identifying at least one interfered resource comprises detecting traffic, pilot, modulation and/or spatial rank information.

8. The method of claim 1, in which the reading comprises reading neighbor cell or channel system information.

9. The method of claim 1, in which the least one interfered resource comprises at least one interfered resource block (RB).

10. The method of claim 9, further comprising at least one of:

selecting edge resource blocks from the at least one interfered RB for physical uplink control channel (PUCCH) interference cancellation;

selecting edge resource blocks from the at least one interfered RBs for physical random access channel (PRACH) interference cancellation ;

selecting valid contiguous resource blocks from the at least one interfered RB for physical uplink shared channel (PUSCH) interference cancellation;

or

a combination thereof.

11. An apparatus for wireless communication, comprising:

a memory; and

at least one processor coupled to the memory, the at least one processor being configured;

to read system information from a neighboring cell to identify a neighboring time domain resource allocation;

to identify at least one candidate resource based on a comparison of the neighboring time domain resource allocation and a serving cell time domain resource allocation;

to identify at least one interfered resource by detecting uplink interference on one or more resource, from the at least one candidate resource, based on a criteria; and

to perform interference cancellation on the at least one interfered resource.

12. The apparatus of claim 11, in which the neighboring time domain resource allocation and serving cell time domain resource allocation are subframe allocation configurations.

13. The apparatus of claim 12, in which the subframe allocation configurations are one of:

time division duplex (TDD) subframe configurations;

or

device-to-device (D2D) subframe configurations.

14. The apparatus of claim 13, in which the subframe allocation configurations are TDD configurations and the at least one processor is configured to compare candidate resource comprises at least subframe on which the neighboring time domain resource allocation includes an uplink subframe and the serving cell time domain resource allocation includes a downlink subframe.

15. The apparatus of claim 13, in which the subframe allocation configurations are D2D configurations and the at least one candidate resource comprises at least subframe on which the neighboring time domain resource allocation includes a D2D subframe and the serving cell time domain resource allocation includes a wide area network (WAN) subframe.

16. The apparatus of claim 11, in which the neighboring time domain resource allocation and the serving cell time domain resource allocation are allocated different transmission types.

17. The apparatus of claim 16, in which the at least one processor is configured to identify at least one interfered resource by detecting traffic, pilot, modulation and/or spatial rank information.

18. The apparatus of claim 11, in which the at least one processor is configured to read by reading neighbor cell or channel system information.

19. The apparatus of claim 11, in which the least one interfered resource comprises at least one interfered resource block (RB).

20. The apparatus of claim 19, in which the at least one processor is further configured:

to select edge resource blocks from the at least one interfered RB for physical uplink control channel (PUCCH) interference cancellation;

to select edge resource blocks from the at least one interfered RBs for physical random access channel (PRACH) interference cancellation;

selecting valid contiguous resource blocks from the at least one interfered RB for physical uplink shared channel (PUSCH) interference cancellation;

or

a combination thereof.

21. A computer program product for wireless communication in a wireless network, comprising:

a non-transitory computer-readable medium having non-transitory program code recorded thereon, the program code comprising;

program code to read system information from a neighboring cell to identify a neighboring time domain resource allocation;

program code to identify at least one candidate resource based on a comparison of the neighboring time domain resource allocation and a serving cell time domain resource allocation;

program code to identify at least one interfered resource by detecting uplink interference on one or more resource, from the at least one candidate resource, based on a criteria; and

program code to perform interference cancellation on the at least one interfered resource.

22. An apparatus for wireless communication, comprising:

means for reading system information from a neighboring cell to identify a neighboring time domain resource allocation;

means for identifying at least one candidate resource based on a comparison of the neighboring time domain resource allocation and a serving cell time domain resource allocation;

means for identifying at least one interfered resource by detecting uplink interference on one or more resource, from the at least one candidate resource, based on a criteria; and

means for performing interference cancellation on the at least one interfered resource.