Parameter combination for coherent joint transmission

Patent metadata

Field	Value
Publication number	US-2024275452-A1
Application number	US-202418406019-A
Country	US
Kind code	A1
Filing date	Jan 5, 2024
Priority date	Jan 18, 2023
Publication date	Aug 15, 2024
Grant date	—

Abstract

Apparatuses and methods for subset restriction for parameter combination for coherent joint transmission in wireless networks. A method performed by a user equipment includes receiving information about a CSI report. The information includes codebook parameters N L ≥1 combinations of values of {L 1 , . . . , L N TRP } from a first table and a value of (p v , β) from a second table. {L 1 , . . . , L N TRP } is used to determine a number of first set of vectors associated with each of N TRP groups of ports, N TRP is a number ≥1, β is a parameter used to determine a maximum number of coefficients, and p v are parameters used to determine a second set of vectors. The method further includes determining the CSI report based on the information and transmitting the CSI report. The codebook parameters are configured based on a third table that links the first and second tables.

First claim

What is claimed is:

1 . A user equipment (UE) comprising:
a transceiver configured to receive information about a channel state information (CSI) report, the information including codebook parameters:
N L >1 combinations of values of {L 1 , . . . , L N TRP } from a first table, and
a value of (p v , β) from a second table,
wherein {L 1 , . . . , L N TRP } is related to a number of first set of vectors associated with each of N TRP groups of ports, N TRP is a number ≥1, β is a parameter related to a maximum number of coefficients, and p v are parameters related to a second set of vectors; and
a processor operably coupled to the transceiver, the processor configured to determine the CSI report based on the information, wherein the transceiver is further configured to transmit the CSI report, wherein the codebook parameters are configured based on a third table that links the first and second tables.

2 . The UE of claim 1 , wherein a first radio resource control (RRC) parameter indicates the N L combinations of values of {L 1 , . . . , L N TRP } from the first table given by:

First RRC

N TRP
parameter
{L 1 , . . . , L N TRP }

1
A1
{2}

A2
{4}

A3
{6}

2
A4
{2, 2}

A5
{2, 4}

A6
{4, 2}

A7
{4, 4}

3
A8
{2, 2, 2}

A9
{2, 2, 4}

A10
{2, 4, 2}

A11
{4, 2, 2}

A12
{4, 4, 4}

4
A13
{2, 2, 2, 2}

A14
{2, 2, 2, 4}

A15
{2, 2, 4, 4}

A16
{4, 4, 4, 4}

wherein each of the N L combinations of values of {L 1 , . . . , L N TRP } is indicated via N TRP and a value of the first RRC parameter that is configured from a set of values including A1, A2, . . . , and A16.

3 . The UE of claim 1 , wherein:
the second table comprises a first value of p v for a first rank set {1, 2} and a second value of p v for a second rank set {3, 4} and the CSI report is determined for a rank value v from one of the first and second rank sets.

4 . The UE of claim 3 , wherein a second radio resource control (RRC) parameter indicates a value of (p v , β) from the second table given by:

Second RRC
p υ

parameter
υ ∈ {1, 2}
υ ∈ {3, 4}
β

B1
⅛
1/16
¼

B2
⅛
1/16
½

B3
¼
⅛
¼

B4
¼
⅛
½

B5
¼
¼
¾

B6
½
¼
½

B7
½
½
½

wherein the value of (p v , β) is indicated via a value of the second RRC parameter that is configured from a set of values including B1, B2, . . . , and B7.

5 . The UE of claim 1 , wherein the third table includes configurable combinations between a value of {L 1 , . . . , L N TRP } and a value of (p v , β) marked with ‘x’ in the following table:

First radio

resource control

(RRC)
Second RRC parameter

N TRP
parameter
B1
B2
B3
B4
B5
B6
B7

1
A1

x
x

A2

x
x
x

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lee Gilwon
• Rahman Md Saifur
• Onggosanusi Eko

Classifications

• H04B7/0634

  Antenna weights or vector/matrix coefficients · CPC title

• H04B7/0456

  Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting · CPC title

• H04B7/063

  Parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection · CPC title

• H04B7/0632

  Channel quality parameters, e.g. channel quality indicator [CQI] · CPC title

• H04B7/0639

  Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection · CPC title