Method and apparatus for notifying channel quality indicator and modulation and coding scheme

Patent metadata

Field	Value
Publication number	US-11463193-B2
Application number	US-201916703509-A
Country	US
Kind code	B2
Filing date	Dec 4, 2019
Priority date	Jun 8, 2013
Publication date	Oct 4, 2022
Grant date	Oct 4, 2022

Abstract

A modulation and coding scheme (MCS) notifying method is provided. The method includes: learning, by a terminal, a first channel quality indicator (CQI) index according to a first CQI table, and sending the first CQI index to a base station; receiving, by the base station, the first CQI index sent by the terminal device, determining a first MCS index according to the first CQI table, a first MCS table, and the received first CQI index, and sending the determined first MCS index to the terminal device; and 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 an entry in which a modulation scheme is higher than 64QAM.

First claim

What is claimed is:

1. A modulation and coding scheme (MCS) notifying method, comprising:
receiving, by a user equipment (UE), a first MCS index from a base station;
determining, by the UE, a first transport block size (TBS) index and a modulation order according to a first MCS table and the first MCS index; and
determining, by the UE, a code block size according to the first TBS index, a first physical resource block (PRB) quantity, and a first TBS table;
wherein the first MCS table comprises 32 entries corresponding to 32 MCS indices ranging from 0 to 31, each entry in the first MCS table comprises a MCS index and a modulation order; wherein:
MCS indices 0 to 4 and 28 correspond to 6 entries in which the modulation orders are 2 respectively;
MCS indices 5 to 10 and 29 correspond to 7 entries in which the modulation orders are 4 respectively;
MCS indices 11 to 19 and 30 correspond to 10 entries in which the modulation orders are 6 respectively; and
MCS indices 20 to 27 and 31 correspond to 9 entries in which the modulation orders are 8 respectively; and
wherein, corresponding to a TBS index 27 in the first TBS table, the first TBS table further comprises at least one entry in the following table, and wherein any one entry comprises one PRB quantity and one transmission block size corresponding to the PRB quantity:

PRB quantity

TBS index
1
2
3
4
5
6
7
8
9
10

27
648
1320
1992
2664
3368
4008
4584
5352
5992
6712

PRB quantity

TBS index
11
12
13
14
15
16
17
18
19
20

27
7224
7992
8504
9144
9912
10680
11448
11832
12576
12960

PRB quantity

TBS index
21
22
23
24
25
26
27
28
29
30

27
14112
14688
15264
15840
16416
16992
17568
18336
19080
19848

PRB quantity

TBS index
31
32
33
34
35
36
37
38
39
40

27
20616
21384
22152
22920
22920
23688
24496
25456
25456
26416

PRB quantity

TBS index
41
42
43
44
45
46
47
48
49
50

27
27376
27376
28336
29296
29296
30576
31704
31704
32856
32856

PRB quantity

TBS index
51
52
53
54
55
56
57
58
59
60

27
34008
34008
35160
35160
36696
36696
37888
37888
39232
39232

PRB quantity

TBS index
61
62
63
64
65
66
67
68
69
7

Assignees

• Huawei Tech Co Ltd

Inventors

• Xia Liang
• Xia Yuan

Classifications

• H04L5/02

  Channels characterised by the type of signal · CPC title

• H04L1/0003 Primary

  by switching between different modulation schemes · CPC title

• H04L1/0009

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

• H04L1/0016 Primary

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

• H04L1/0026 Primary

  Transmission of channel quality indication · CPC title