Coordinated multipoint (CoMP) and network assisted interference suppression/cancellation

• US 10,263,741 B2
• Filed: 05/08/2014
• Issued: 04/16/2019
• Est. Priority Date: 05/10/2013
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Chen, Wanshi, Luo, Tao, Geirhofer, Stefan, Gaal, Peter, Xu, Hao
• Primary Examiner(s): Nawaz, Asad M
• Assistant Examiner(s): Chang, Kai
• Application Number:
  US14/273,049
• Publication Number:
  US 20140334402A1
• Time in Patent Office: 1,804 Days
• CPC Class Codes: H04B 7/024 Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
• CPC Class Codes: H04B 7/0617 for beam forming
• CPC Class Codes: H04B 7/0619 using feedback from receiving side feedback signaling for adaptive modulation/coding H04L1/0001
• CPC Class Codes: H04B 7/0621 Feedback content
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0035 Resource allocation in a cooperative multipoint environment
• CPC Class Codes: H04L 5/0048 Allocation of pilot signals, i.e. of signals known to the receiver
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04W 72/12 Wireless traffic scheduling

Abstract

A method of wireless communications identifies a first virtual cell identity. The method also includes determining one or more virtual cells based on the identified first virtual cell identity. The method further includes processing one channel based on the determination.

Claims

1. A method of wireless communications, comprising:

receiving, at a user equipment (UE), shared channel rate matching and quasi co-location indication (PQI) bits;

identifying, at the UE, a set of parameters from the PQI bits, the set of parameters comprising at least one of a cell identity, a number of ports for cell-specific reference signals (CRS), a frequency shift of CRS, a modulation order for a channel, a channel state information reference signal (CSI-RS) configuration, or a combination thereof;

identifying, at the UE, a first virtual cell identity (VCI) associated with the set of parameters;

determining, at the UE, at least one first virtual cell based at least in part on the identified first VCI; and

performing, at the UE, interference cancellation or interference suppression on at least one interfering channel of the at least one first virtual cell, the at least one interfering channel identified at the UE based at least in part on the set of parameters.

2. The method of claim 1, further comprising receiving the set of parameters for a rate matching operation, a quasi-co-location for coordinated multipoint (CoMP) operation, or a combination thereof.

3. The method of claim 2, in which the rate matching operation and the quasi-co-location for CoMP operation are for at least a physical downlink shared channel (PDSCH), an enhanced physical downlink control channel (EPDCCH), or a combination thereof.

4. The method of claim 1, in which the interference cancellation or interference suppression is performed for at least inter-cell interference, intra-cell interference due to single-user multiple-input multiple-output (SU-MIMO) operation, intra-cell interference due to multi-user MIMO (MU-MIMO) operation, or a combination thereof.

5. The method of claim 1, further comprising identifying a second VCI that is different from the first VCI, in which at least one second virtual cell is determined based at least in part on the identified second VCI.

6. The method of claim 5, in which the at least one second virtual cell is different from the at least one first virtual cell associated with the first VCI, and a difference between the at least one second virtual cell and the at least one first virtual cell comprises at least a number of virtual cells, the set of parameters associated with the at least one first virtual cell, or a combination thereof.

7. The method of claim 5, in which the first VCI and the second VCI are identified in a same frame.

8. The method of claim 5, in which the first VCI is identified in a first subframe and the second VCI is identified in a second subframe that is different from the first subframe.

9. The method of claim 1, in which the at least one interfering channel is a data channel or a control channel.

10. The method of claim 1, further comprising determining a timing for the interference cancellation or the interference suppression based at least in part on the set of parameters.

11. A user equipment (UE) for wireless communication, comprising:

a memory; and

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

to receive shared channel rate matching and quasi co-location indication (PQI) bits;

to identify a set of parameters from the PQI bits, the set of parameters comprising at least one of a cell identity, a number of ports for cell-specific reference signals (CRS), a frequency shift of CRS, a modulation order for a channel, a channel state information reference signal (CSI-RS) configuration, or a combination thereof;

to identify a first virtual cell identity (VCI) associated with the set of parameters;

to determine at least one first virtual cell based at least in part on the identified first VCI; and

to perform interference cancellation or interference suppression on at least one interfering channel of the at least one first virtual cell, the at least one interfering channel identified at the UE based at least in part on the set of parameters.

12. The UE of claim 11, in which the at least one processor is further configured to receive the set of parameters for a rate matching operation, a quasi-co-location for coordinated multipoint (CoMP) operation, or a combination thereof.

13. The UE of claim 12, in which the rate matching operation and the quasi-co-location for CoMP operation are for at least a physical downlink shared channel (PDSCH), an enhanced physical downlink control channel (EPDCCH), or a combination thereof.

14. The UE of claim 11, in which the interference cancellation or interference suppression is performed for at least inter-cell interference, intra-cell interference due to single-user multiple-input multiple-output (SU-MIMO) operation, intra-cell interference due to multi-user MIMO (MU-MIMO) operation, or a combination thereof.

15. The UE of claim 11, in which the at least one processor is further configured to identify a second VCI that is different from the first VCI, in which at least one second virtual cell is determined based at least in part on the identified second VCI.

16. The UE of claim 15, in which the at least one second virtual cell is different from the at least one first virtual cell associated with the first VCI, and a difference between the at least one second virtual cell and the at least one first virtual cell comprises at least a number of virtual cells, the set of parameters associated with the at least one first virtual cell, or a combination thereof.

17. The UE of claim 15, in which the first VCI and the second VCI are identified in a same frame.

18. The UE of claim 15, in which the first VCI is identified in a first subframe and the second VCI is identified in a second subframe that is different from the first subframe.

19. The UE of claim 11, in which the at least one interfering channel is a data channel or a control channel.

20. The UE of claim 11, in which the at least one processor is further configured to determine a timing for the interference cancellation or the interference suppression based at least in part on the set of parameters.