Methods, apparatuses, and systems for multi-point, multi-cell single-user based multiple input and multiple output transmissions

Patent metadata

Field	Value
Publication number	US-9906344-B2
Application number	US-201514928759-A
Country	US
Kind code	B2
Filing date	Oct 30, 2015
Priority date	Feb 23, 2015
Publication date	Feb 27, 2018
Grant date	Feb 27, 2018

Abstract

Methods, systems, and storage media for providing multi-cell, multi-point single user (SU) multiple input and multiple output (MIMO) operations are described. In embodiments, an apparatus may receive and process a first set of one or more independent data streams received in a downlink channel from a first transmission point. The apparatus may receive and process a second set of one or more independent data streams received in a downlink channel from a second transmission point. The apparatus may process control information received from the first transmission point or the second transmission point. The control information may include an indication of a quasi co-location assumption to be used for estimating channel characteristics for reception of the first set of one or more independent data streams or the second set of one or more independent data streams. Other embodiments may be described and/or claimed.

First claim

The invention claimed is:

1. At least one non-transitory, computer-readable medium including instructions that, when executed by one or more processors, cause a user equipment (UE) to:
control receipt of control information from a first transmission point or a second transmission point, wherein the control information includes an indication to indicate a parameter set for determining a quasi co-location (QCL);
determine, based on the indicated parameter set, a QCL assumption to be used for estimating channel characteristics for reception of a first set of layers in a downlink channel from the first transmission point and for reception of a second set of layers in a downlink channel from the second transmission point;
estimate channel characteristics for reception of the first set of layers and for reception of the second set of layers according to the QCL assumption; and
based on the estimated channel characteristics, control receipt of the first set of layers using a first receive antenna and control receipt of the second set of layers using a second receive antenna.

2. The at least one non-transitory, computer-readable medium of claim 1 , wherein:
one or more first independent data streams corresponds to the first set of layers, and the one or more first independent data streams are to be transmitted by at least one antenna port of a plurality of antenna ports associated with one or more UE-specific reference signals of the first transmission point; and
one or more second independent data streams corresponds to the second set of layers, and the one or more second independent data streams are to be transmitted by at least one antenna port of a plurality of antenna ports associated with one or more UE-specific RSs of the second transmission point.

3. The at least one non-transitory, computer-readable medium of claim 2 , wherein the indication is to indicate that the plurality of antenna ports are not assumed to be quasi co-located with respect to at least one of a Doppler shift, a Doppler spread, an average delay, or a delay spread, and wherein a same Doppler shift, Doppler spread, average delay, and delay spread are assumed over a predefined set of physical resource blocks (PRBs).

4. The at least one non-transitory, computer-readable medium of claim 2 , wherein the parameter set includes crs-PortsCount-r11, crs-FreqShift-r11, mbsfn-SubframeConfigList-r11, csi-RS-ConfigZPId-r11, pdsch-Start-r11, and qcl-CSI-RS-ConfigNZPId-r11.

5. The at least one non-transitory, computer-readable medium of claim 2 , wherein the indication is to indicate, for the first set of layers to be transmitted on a first transport block and for the second set of layers to be transmitted on a second transport block, that UE-specific RS antenna ports of the plurality of antenna ports are quasi co-located with one or more antenna ports associated with one or more other RSs.

6. The at least one non-transitory, computer-readable medium of claim 5 , wherein the one or more other RSs include one of cell specific RSs (CRSS), channel state information reference signals (CSI-RSs), or discovery RSs.

7. The at least one non-transitory, computer-readable medium of claim 2 , wherein the indication is to indicate quasi co-location of antenna ports of the plurality of antenna ports associated with the one or more UE-specific RSs with other RSs, and wherein the instructions, when executed by the one or more processors, cause the UE to:
determine one or more other RSs using two or more physical downlink shared channel (PDSCH) resource element (RE) Mapping and Quasi Co-Location Indicator fields.

8. The at least one non-transitory, computer-readable medium of claim 2 , wherein the indication is to indicate quasi co-location of antenna ports of the plurality of antenna ports associated with the one or more UE-specific RSs with other RSs, and wherein the instructions, when executed by the one or more processors, cause the UE to:
determine one or more other RSs using two or more downlink control information (DCI) format 2D messages, wherein each of the two or more DCI format 2D messages include at least one PDSCH RE Mapping and Quasi Co-Location Indicator field.

9. The at least one non-transitory, computer-readable medium of claim 2 , wherein the indication is to indicate an RE mapping for the one or more first independent data streams of the first set of layers and the one or more second independent data streams of the second set of layers, and wherein the instructions, when executed by the one or more processors, cause the UE to:
determine the RE mapping using two or more PDSCH RE Mapping and Quasi-Co-Location Indicator fields.

10. An apparatus to be implemented in a user equipment (UE) comprising:
an antenna array that includes at least a first receive antennas and a second receive antennas;
processor circuitry operatively coupled with the antenna array, the processor circuitry to:
control the first receive antennas to receive a first set of layers in a downlink channel of a first cell;
control the second receive antennas to receive a second set of layers in a downlink channel of a second cell;
control the first receive antennas or the second receive antennas to receive control information from the first cell or the second cell, wherein the control information includes an indication to indicate at least one parameter set for determining quasi co-location (QCL) assumptions;
determine a QCL assumption based on the parameter set, wherein the QCL assumption is to be used for estimating channel characteristics for reception of the first set of layers and for reception of the second set of layers;
estimate, using the QCL assumption, first channel characteristics for reception of the first set of layers, and separately, second channel characteristics for reception of the second set of layers; and
based on the first and second estimated channel characteristics, control the first receive antennas to receive the first set of layers, and control the second receive antennas to receive the second set of layers.

11. The apparatus of claim 10 , wherein:
the first set of layers corresponds to one or more first independent data streams, and the one or more first independent data streams are transmitted by at least one antenna port of a plurality of antenna ports associated with one or more UE-specific RSs of the first cell,
the second set of layers corresponds to one or more second independent data streams, and the one or more second independent data streams are transmitted by at least one antenna port of a plurality of antenna ports associated with one or more UE-specific RSs of the second cell, and
the plurality of antenna ports include antenna ports 7 - 14 .

12. The apparatus of claim 11 , wherein the indication is to indicate that the plurality of antenna ports are not assumed to be quasi co-located with respect to Doppler shift, Doppler spread, average delay, and/or delay spread, and a same Doppler shift, Doppler spread, average delay, and delay spread are to be assumed over a predefined set of physical resource blocks (PRBs).

13. The apparatus of claim 12 , wherein the plurality of antenna ports of one or more UE-specific RS antenna ports is quasi co-located with antenna ports associated with one or more other RSs, wherein the one or more other RSs include at least one of cell specific RSs including antenna ports 0 - 3 , channel state information RSs (CSI-RSs) including antenna ports 15 - 21 , or discovery RSs.

14. The apparatus of claim 11 , wherein the control information includes the indication of quasi co-location of the plurality of antenna ports associated with the one

Assignees

• Intel Corp

Inventors

• Davydov Alexei
• Morozov Gregory
• Sergeyev Vadim
• Maltsev Alexander
• Bolotin Ilya

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L5/0048 Primary

  Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091) · CPC title

• H04B7/024 Primary

  Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems · CPC title

• H04B7/0413

  MIMO systems · CPC title

• H04W72/042

  Electricity · mapped topic