Notification method and apparatus for channel quality indicator and modulation and coding scheme

Patent metadata

Field	Value
Publication number	US-12143209-B2
Application number	US-202318354457-A
Country	US
Kind code	B2
Filing date	Jul 18, 2023
Priority date	Jun 8, 2013
Publication date	Nov 12, 2024
Grant date	Nov 12, 2024

Abstract

A notification method for a CQI and a modulation and coding scheme is provided. The method includes: learning, by a terminal, a first CQI index according to a first CQI table; sending the first CQI index to a base station; receiving, by the base station, the first CQI index sent by the terminal UE; determining a first MCS index according to the first CQI table, a first MCS table, and the received first CQI index; sending the determined first MCS index to the UE; receiving, by the terminal, the first MCS index sent by the base station; and determining a modulation order and a code block size according to the first MCS table and the received first MCS index; where the first CQI table includes entries in which modulation schemes are higher than 64QAM.

First claim

What is claimed is:

1. A communication method comprising:
receiving a channel quality indicator (CQI) index of a first CQI table; and
determining a first modulation scheme according to the CQI index of the first CQI table,
wherein the first CQI table at least comprises the following mapping relationship among the CQI index, a modulation scheme and a spectrum efficiency:

CQI index
Modulation scheme
Spectrum efficiency

0
out of range

1
QPSK
0.1523

2
QPSK
0.3770

3
QPSK
0.8770

4
 16QAM
1.4766

5
 16QAM
1.9141

6
 16QAM
2.4063

7
 64QAM
2.7305

8
 64QAM
3.3223

9
 64QAM
3.9023

10
 64QAM
4.5234

11
 64QAM
5.1152

12
256QAM
5.5547.

2. The method according to claim 1 , wherein the first CQI table further consists of 3 entries corresponding to 3 CQI indices ranging from 13 to 15, and wherein CQI indices 13 to 15 correspond to 3 entries in which the modulation schemes are 256QAM.

3. The method according to claim 1 , wherein the first CQI table further comprises a code rate, and the mapping relationship of the first CQI table further comprises:

Code

CQI index
Modulation scheme
rate × 1024
Spectrum efficiency

0
Out of range

1
QPSK
78
0.1523

2
QPSK
193
0.3770

3
QPSK
449
0.8770

4
 16QAM
378
1.4766

5
 16QAM
490
1.9141

6
 16QAM
616
2.4063

7
 64QAM
466
2.7305

8
 64QAM
567
3.3223

9
 64QAM
666
3.9023

10
 64QAM
772
4.5234

11
 64QAM
873
5.1152

12
256QAM
711
5.5547.

4. The method according to claim 1 , wherein,
a value range of a CQI index in the first CQI table is from 0 to 15, and is the same as a value range of a CQI index in a second CQI table;
an entry in the first CQI table at least comprises a CQI index, a modulation scheme and spectrum efficiency; and
an entry in the second table at least comprises a CQI index, a modulation scheme and spectrum efficiency.

5. The method according to claim 4 , wherein the spectrum efficiency 5.5547 in an entry that is corresponding to CQI index 12 and 256QAM in the first CQI table is equal to a spectrum efficiency in an entry that is corresponding to CQI index 15 and 64QAM in the second CQI table.

6. The method according to claim 4 , wherein the second CQI table at least comprises the following mapping relationship among the CQI index, the modulation scheme and the spectrum efficiency:

CQI index
Modulation scheme
Spectrum efficiency

0
out of range

1
QPSK
0.1523

2
QPSK
0.2344

3
QPSK
0.3770

4
QPSK
0.6016

5
QPSK
0.8770

6
QPSK
1.1758

7
16QAM
1.4766

8
16QA

Assignees

• Huawei Tech Co Ltd

Inventors

• Xia Liang

Classifications

• H04L5/0057

  Physical resource allocation for CQI · CPC title

• H04L1/0026 Primary

  Transmission of channel quality indication · CPC title

• H04L1/0009

  by adapting the channel coding (H04L1/1812 takes precedence) · CPC title

• H04L1/0003 Primary

  by switching between different modulation schemes · CPC title

• H04L1/0016 Primary

  involving special memory structures, e.g. look-up tables · CPC title