Quasi co-location and PDSCH resource element mapping signaling for network assisted interference mitigation

• US 10,103,797 B2
• Filed: 12/16/2013
• Issued: 10/16/2018
• Est. Priority Date: 03/01/2013
• Status: Active Grant

• Current Assignee: Apple Inc.
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: Davydov, Alexei, Han, Seunghee, Morozov, Gregory, Zhu, Yuan, Fwu, Jong-Kae
• Primary Examiner(s): Jain, Raj
• Assistant Examiner(s): Lee, Andrew C
• Application Number:
  US14/764,540
• Publication Number:
  US 20150365154A1
• Time in Patent Office: 1,765 Days
• CPC Class Codes: H04B 17/345 Interference values signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR] H04B17/336
• 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 7/0417 Feedback systems
• CPC Class Codes: H04B 7/0626 Channel coefficients, e.g. channel state information [CSI]
• CPC Class Codes: H04B 7/0632 Channel quality parameters, e.g. channel quality indicator [CQI]
• CPC Class Codes: H04W 72/23 in the downlink direction of a wireless link, i.e. towards a terminal
• CPC Class Codes: H04W 72/541 using the level of interference
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

Embodiments of the present disclosure describe systems and methods for mitigating interference in wireless networks. Various embodiments may include signaling of quasi co-location and resource element mapping of an interfering physical downlink shared channel. Other embodiments may be described and/or claimed.

Claims

1. An apparatus to be employed in user equipment, the apparatus comprising:

channel determination circuitry to;

receive, from an access node associated with a serving cell of a radio access network (RAN), downlink channel information associated with an interfering cell; and

determine, based on the downlink channel information, downlink parameters of the interfering cell, the downlink parameters including an indicator to indicate;

whether an antenna port used for a reference signal or a physical downlink shared channel (PDSCH) in the interfering cell is quasi co-located with another antenna port;

or an interfering PDSCH resource element (RE) mapping; and

interference estimation circuitry coupled with the channel determination circuitry, the interference estimation circuitry to estimate an interference profile associated with the interfering cell based on the determined downlink parameters of the interfering cell, wherein the downlink parameters of the interfering cell include;

a number of common reference signal (CRS) antenna ports for the interfering PDSCH RE mapping;

a CRS frequency shift for the interfering PDSCH RE mapping;

a multicast-broadcast single-frequency network (MBSFN) subframe configuration for the interfering PDSCH RE mapping;

a zero-power channel state information-reference signal (CSI-RS) resource configuration for the interfering PDSCH RE mapping;

a non zero-power CSI-RS resource configuration for the interfering PDSCH RE mapping; and

/or

a PDSCH starting position for the interfering PDSCH RE mapping.

2. The apparatus of claim 1, wherein the channel determination circuitry is semi-statically configured with the downlink channel information based on radio resource control signaling.

3. The apparatus of claim 1, wherein the indicator is a quasi co-location indicator to indicate whether antenna ports 7-14 associated with a PDSCH of the interfering cell are quasi co-located, with respect to Doppler shift, Doppler spread, average delay, and/or delay spread, with antenna ports 0-3 associated with a CRS of the interfering cell.

4. The apparatus of claim 3, wherein the CRS and a user equipment (UE)-specific reference signal of the interfering cell have a common scrambling identity that is based on a physical cell identity of the interfering cell.

5. The apparatus of claim 3, wherein configuration of a user equipment (UE)-specific reference signal of the interfering cell includes a physical cell identity of the CRS of the interfering cell.

6. The apparatus of claim 1, wherein the indicator corresponds to:

zero-power CSI-RS resource configuration for the interfering PDSCH RE mapping.

7. The apparatus of claim 1, wherein the channel determination circuitry is configured with only one parameter set that includes the downlink parameters and the channel determination circuitry is to determine the downlink parameters independent of downlink control information (DCI) signaling.

8. An apparatus to be employed in a user equipment, the apparatus comprising:

channel determination circuitry to receive configuration information that includes an indication of a quasi co-location relationship between one or more antenna ports associated with a serving physical downlink shared channel (PDSCH) and one or more antenna ports associated with an interfering PDSCH; and

interference estimation circuitry coupled with the channel determination circuitry, the interference estimation circuitry to estimate an interference profile associated with the interfering PDSCH based on the configuration information,

wherein the quasi co-location relationship is that antenna ports 7-14 associated with the serving PDSCH are not quasi co-located with antenna ports 7-14 associated with the interfering PDSCH.

9. The apparatus of claim 8, wherein the channel determination circuitry is to receive the configuration information as part of being semi-statically configured by an access node using radio resource control signaling.

10. The apparatus of claim 8, wherein the channel determination circuitry is to determine that interfering PDSCH RE mapping follows serving PDSCH RE mapping based on the configuration information.

11. The apparatus of claim 10, wherein the channel determination circuitry is further to determine the serving PDSCH RE mapping based on downlink control information (DCI) received in a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (EPDCCH).

12. One or more non-transitory computer-readable media having instructions that, when executed by one or more processors, cause a user equipment to:

store a plurality of parameter sets, with individual parameter sets including parameters that correspond to resource element (RE) mapping or quasi co-location (QCL) behavior for an interfering physical downlink shared channel (PDSCH); and

obtain downlink control information (DCI) from a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (EPDCCH);

select, based on the DCI, a parameter set from the plurality of parameter sets; and

decode signals received from a serving cell based on the selected parameter set,

wherein the individual parameter sets include;

a number of common reference signal (CRS) antenna ports for interfering PDSCH RE mapping;

a CRS frequency shift for interfering PDSCH RE mapping;

a multicast-broadcast single-frequency network (MBSFN) subframe configuration for interfering PDSCH RE mapping;

a zero-power channel state information-reference signal (CSI-RS) resource configuration for interfering PDSCH RE mapping;

a PDSCH starting position for interfering PDSCH RE mapping; and

/or a CSI-RS resource configuration identity for quasi co-location with antenna ports of interfering PDSCH.

13. The one or more non-transitory computer-readable media of claim 12, wherein the DCI includes two bits and the plurality of parameter sets includes four parameter sets with individual parameter sets including RE mapping and QCL behavior for both serving and interfering PDSCH.

14. The one or more non-transitory computer-readable media of claim 12, wherein the individual parameter sets further include a number of CRS antenna ports for serving PDSCH RE mapping;

a CRS frequency shift for serving PDSCH RE mapping;

an MBSFN subframe configuration for serving PDSCH RE mapping;

a zero-power CSI-RS resource configuration for serving PDSCH RE mapping;

a PDSCH starting position for serving PDSCH RE mapping; and

/or a CSI-RS resource configuration identity for quasi co-location.

15. The one or more non-transitory computer-readable media of claim 12, wherein the instructions, when executed by the one or more processors, further cause the user equipment to:

configure, with a QCL behavior type based on configuration information, the QCL behavior type to indicate that antenna ports 15-22 corresponding to a channel state information-reference signal (CSI-RS) resource configuration identified by a CSI-RS resource configuration identity for interfering PDSCH RE mapping of a selected parameter set is quasi co-located with antenna ports 7-14 associated with the interfering PDSCH with respect to Doppler shift, Doppler spread, average delay, and/or delay spread.

16. One or more non-transitory computer-readable media having instructions that, when executed by one or more processors, cause a user equipment to:

store a plurality of parameter sets, with individual parameter sets including parameters that correspond to resource element (RE) mapping or quasi co-location (QCL) behavior for an interfering physical downlink shared channel (PDSCH);

obtain downlink control information (DCI) from a physical downlink control channel (PDCCH) or an enhanced physical downlink control channel (EPDCCH);

select, based on the DCI, a parameter set from the plurality of parameter sets; and

decode signals received from a serving cell based on the selected parameter set, wherein the plurality of parameter sets is a first plurality of parameter sets, the parameter set is a first parameter set, and the instructions, when executed by one or more processors, further cause the UE to;

store a second plurality of parameter sets, with individual parameter sets of the second plurality including parameters that correspond to RE mapping or QCL behavior for a serving PDSCH;

select, based on the DCI, a second parameter set from the second plurality of parameter sets; and

decode signals received from the serving cell based further on the selected second parameter set.