Method and apparatus to enable multi-resolution CSI reporting in advanced wireless communication systems

Patent metadata

Field	Value
Publication number	US-10200103-B2
Application number	US-201715796584-A
Country	US
Kind code	B2
Filing date	Oct 27, 2017
Priority date	Nov 23, 2016
Publication date	Feb 5, 2019
Grant date	Feb 5, 2019

Abstract

A method of user equipment (UE) for channel state information (CSI) feedback in a wireless communication system. The method comprises receiving, from a base station (BS), CSI feedback configuration information for a pre-coding matrix indicator (PMI) feedback indicating a linear combination (LC) pre-coding matrix that corresponds to a linear combination of a plurality of L beams and a plurality of coefficients, determining the first PMI (i 1 ) and the second PMI (i 2 ), and transmitting, to the BS, the CSI feedback including the first PMI (i 1 ) and the second PMI (i 2 ) over an uplink channel.

First claim

What is claimed is:

1. A user equipment (UE) for channel state information (CSI) feedback in a wireless communication system, the UE comprising:
a transceiver configured to receive, from a base station (BS), CSI feedback configuration information for a pre-coding matrix indicator (PMI) feedback indicating a linear combination (LC) pre-coding matrix that corresponds to a linear combination of a plurality of L beams and a plurality of coefficients, wherein:
each of the plurality of coefficients comprises at least an amplitude coefficient and a phase coefficient;
the PMI comprises a first PMI (i 1 ) and a second PMI (i 2 ) indicating wideband (WB) and subband (SB) components of the LC pre-coding matrix, respectively;
the first PMI (i i ) includes first and second sets of indicators indicating common WB components for all layers of a plurality of layers and independent WB components for each layer of the plurality of layers, respectively;
the second PMI (i 2 ) includes a set of indicators indicating independent SB components for each layer of the plurality of layers; and
the plurality of layers is determined based on a value v associated with a rank indicator (RI); and

at least one processor configured to determine the first PMI (i 1 ) and the second PMI (i 2 ), wherein the transceiver is further configured to transmit, to the BS, the CSI feedback including the first PMI (i 1 ) and the second PMI (i 2 ) over an uplink channel.

2. The UE of claim 1 , wherein the first PMI (i i ) includes a first set of indicators s 1 =[i 1,1 i 1,2 ] indicating the plurality of L beams that comprise common WB components for all layers of the plurality of layers.

3. The UE of claim 1 , wherein the first PMI (i i ) includes a second set of indicators

S
2

=

{

[

i

1
,
3
,
1

⁢

⁢

i

1
,
4
,
1

]

if
⁢

⁢
υ

=
1

[

i

1
,
3
,
1

⁢

⁢

i

1
,
4
,
1

⁢

⁢

i

1
,
3
,
2

⁢

⁢

i

1
,
4
,
2

]

if
⁢

⁢
υ

=
2

to indicate independent WB components for each layer of the plurality of ν=1 or ν=2 layers, and wherein ν=1 corresponds to a first layer and ν=2 corresponds to first and second layers, i 1,3,1 and i 1,3,2 indicate a strongest coefficient among the plurality of coefficients for each of the first layer and the second layer, respectively, and i 1,4,1 and i 1,4,2 indicate a plurality of WB amplitude coefficients for each of the first layer and the second layer, respectively.

4. The UE of claim 1 , wherein the second PMI (i 2 ) includes the set of indicators

i

2
,
1

=

{

[

i

2
,
1
,
1

]

if
⁢

⁢
υ

=
1

[

i

2
,
1
,

Assignees

• Samsung Electronics Co Ltd
• Samsung Electronics Co Ltd

Inventors

• Rahman Md Saifur
• Onggosanusi Eko

Classifications

• H04B7/0626 Primary

  Channel coefficients, e.g. channel state information [CSI] · CPC title

• H04B7/0634

  Antenna weights or vector/matrix coefficients · CPC title

• H04B7/10

  Polarisation diversity; Directional diversity · CPC title

• H04B7/06956

  using a selection of antenna panels · CPC title

• H04B7/0478 Primary

  Special codebook structures directed to feedback optimisation · CPC title