US 9,755,814 B2Granted

Method of determining transport block size and apparatuses thereof

AssigneeKt Corporation

InventorsSeung Hyun Kang, Woo-jin Choi

Life of this patent

Estimating the term…

Abstract

The present disclosure relates to a method and apparatus for determining a Transport Block Size (TBS) in a wireless communication system, and more particularly, to a method and apparatus for determining a TBS table in association with 256 QAM. Particularly, a method for a base station to transmit data includes receiving Channel State Information (CSI) from a User Equipment, determining a Transport Block Size (TBS) value based on a TBS table including indices corresponding to the 256QAM modulation scheme and the number of allocable Physical Resource Block (PRB) pairs, and transmitting data using the TBS value.

Claims15

Dependent claims

A method for a base station to transmit data, the method comprising:

receiving Channel State Information (CSI) from a User Equipment;
determining a Transport Block Size (TBS) value based on a TBS table including indices for supporting a 256 quadrature amplitude modulation (QAM) modulation scheme and a number of allocable Physical Resource Block (PRB) pairs;
and
transmitting data using the TBS value,
wherein the TBS table sets TBS indices 27 to 33 for supporting the 256QAM modulation scheme;
and TBS values for supporting the 256QAM modulation scheme in the TBS table are set based on a number of resource elements of a PRB pair, a number of allocable PRB pairs, and a transmission efficiency value for each index;
and
wherein TBS values of the TBS indices 27 to 32 are set by applying a condition that the number of resource elements of the PRB pair is 120;
a TBS value of the TBS index 33 is set by applying a condition that the number of resource elements of the PRB pair is 136;
and the TBS values of the TBS indices 27 to 33 are set by applying a condition that the number of allocable PRB pairs is inclusively between 1 and 110,
wherein a TBS value of the TBS index 28 for supporting the 256QAM modulation scheme in the TBS table is set as shown in the following table
NPRB
1
2
3
4
5
6
7
8
TBS
680
1384
2088
2792
3496
4264
4968
5544
NPRB
9
10
11
12
13
14
15
16
TBS
6200
6968
7736
8504
9144
9912
10680
11064
NPRB
17
18
19
20
21
22
23
24
TBS
11832
12576
13536
14112
14688
15264
16416
16992
NPRB
25
26
27
28
29
30
31
32
TBS
17568
18336
19080
19848
20616
21384
22152
22152
NPRB
33
34
35
36
37
38
39
40
TBS
22920
23688
24496
25456
26416
26416
27376
28336
NPRB
41
42
43
44
45
46
47
48
TBS
29296
29296
30576
30576
31704
32856
32856
34008
NPRB
49
50
51
52
53
54
55
56
TBS
34008
35160
35160
36696
36696
37888
39232
39232
NPRB
57
58
59
60
61
62
63
64
TBS
40576
40576
42368
42368
42368
43816
43816
45352
NPRB
65
66
67
68
69
70
71
72
TBS
45352
46888
46888
46888
48936
48936
48936
51024
NPRB
73
74
75
76
77
78
79
80
TBS
51024
52752
52752
52752
55056
55056
55056
57336
NPRB
81
82
83
84
85
86
87
88
TBS
57336
57336
59256
59256
59256
61664
61664
61664
NPRB
89
90
91
92
93
94
95
96
TBS
61664
63776
63776
63776
66592
66592
66592
66592
NPRB
97
98
99
100
101
102
103
104
TBS
68808
68808
68808
71112
71112
71112
73712
73712
NPRB
105
106
107
108
109
110
TBS
73712
75376
75376
76208
76208
76208.

256 more elements

A method for a User Equipment to receive data, the method comprising:

transmitting Channel State Information (CSI) to a base station;
and
receiving data using a Transport Block Size (TBS) value determined based on the CSI,
wherein the TBS value is determined based on a TBS table including indices for supporting a 256 quadrature amplitude modulation (QAM) modulation scheme, and a number of allocable Physical Resource Block (PRB) pairs;
wherein the TBS table sets TBS indices 27 to 33 for supporting the 256QAM modulation scheme;
and TBS values for supporting the 256QAM modulation scheme in the TBS table are set based on a number of resource elements of a PRB pair, a number of allocable PRB pairs, and a transmission efficiency value for each index;
and
wherein TBS values of the TBS indices 27 to 32 are set by applying a condition that the number of resource elements of the PRB pair is 120;
a TBS value of the TBS index 33 is set by applying a condition that the number of resource elements of the PRB pair is 136;
and the TBS values of the TBS indices 27 to 33 are set by applying a condition that the number of allocable PRB pairs is inclusively between 1 and 110,
wherein a TBS value of the TBS index 28 for supporting the 256QAM modulation scheme in the TBS table is set as shown in the following table
NPRB
1
2
3
4
5
6
7
8
9
10
TBS
680
1384
2088
2792
3496
4264
4968
5544
6200
6968
NPRB
11
12
13
14
15
16
17
18
19
20
TBS
7736
8504
9144
9912
10680
11064
11832
12576
13536
14112
NPRB
21
22
23
24
25
26
27
28
29
30
TBS
14688
15264
16416
16992
17568
18336
19080
19848
20616
21384
NPRB
31
32
33
34
35
36
37
38
39
40
TBS
22152
22152
22920
23688
24496
25456
26416
26416
27376
28336
NPRB
41
42
43
44
45
46
47
48
49
50
TBS
29296
29296
30576
30576
31704
32856
32856
34008
34008
35160
NPRB
51
52
53
54
55
56
57
58
59
60
TBS
35160
36696
36696
37888
39232
39232
40576
40576
42368
42368
NPRB
61
62
63
64
65
66
67
68
69
70
TBS
42368
43816
43816
45352
45352
46888
46888
46888
48936
48936
NPRB
71
72
73
74
75
76
77
78
79
80
TBS
48936
51024
51024
52752
52752
52752
55056
55056
55056
57336
NPRB
81
82
83
84
85
86
87
88
89
90
TBS
57336
57336
59256
59256
59256
61664
61664
61664
61664
63776
NPRB
91
92
93
94
95
96
97
98
99
100
TBS
63776
63776
66592
66592
66592
66592
68808
68808
68808
71112
NPRB
101
102
103
104
105
106
107
108
109
110
TBS
71112
71112
73712
73712
73712
75376
75376
76208
76208
76208.

250 more elements

A base station that transmits data, comprising:

a receiver configured to receive Channel State Information (CSI) from a User Equipment;
a controller configured to determine a Transport Block Size (TBS) value based on a TBS table including indices corresponding to a 256QAM modulation scheme, and a number of allocable Physical Resource Block (PRB) pairs;
and
a transmitter configured to transmit data using the TBS value,
wherein the TBS table sets TBS indices 27 to 33 for supporting the 256QAM modulation scheme;
and TBS values for supporting the 256QAM modulation scheme in the TBS table are set based on a number of resource elements of a PRB pair, a number of allocable PRB pairs, and a transmission efficiency value for each index;
and
wherein TBS values of the TBS indices 27 to 32 are set by applying a condition that the number of resource elements of the PRB pair is 120;
a TBS value of the TBS index 33 is set by applying a condition that the number of resource elements of the PRB pair is 136;
and the TBS values of the TBS indices 27 to 33 are set by applying a condition that the number of allocable PRB pairs is inclusively between 1 and 110,
wherein a TBS value of the TBS index 28 for supporting the 256QAM modulation scheme in the TBS table is set as shown in the following table
NPRB
1
2
3
4
5
6
7
8
TBS
680
1384
2088
2792
3496
4264
4968
5544
NPRB
9
10
11
12
13
14
15
16
TBS
6200
6968
7736
8504
9144
9912
10680
11064
NPRB
17
18
19
20
21
22
23
24
TBS
11832
12576
13536
14112
14688
15264
16416
16992
NPRB
25
26
27
28
29
30
31
32
TBS
17568
18336
19080
19848
20616
21384
22152
22152
NPRB
33
34
35
36
37
38
39
40
TBS
22920
23688
24496
25456
26416
26416
27376
28336
NPRB
41
42
43
44
45
46
47
48
TBS
29296
29296
30576
30576
31704
32856
32856
34008
NPRB
49
50
51
52
53
54
55
56
TBS
34008
35160
35160
36696
36696
37888
39232
39232
NPRB
57
58
59
60
61
62
63
64
TBS
40576
40576
42368
42368
42368
43816
43816
45352
NPRB
65
66
67
68
69
70
71
72
TBS
45352
46888
46888
46888
48936
48936
48936
51024
NPRB
73
74
75
76
77
78
79
80
TBS
51024
52752
52752
52752
55056
55056
55056
57336
NPRB
81
82
83
84
85
86
87
88
TBS
57336
57336
59256
59256
59256
61664
61664
61664
NPRB
89
90
91
92
93
94
95
96
TBS
61664
63776
63776
63776
66592
66592
66592
66592
NPRB
97
98
99
100
101
102
103
104
TBS
68808
68808
68808
71112
71112
71112
73712
73712
NPRB
105
106
107
108
109
110
TBS
73712
75376
75376
76208
76208
76208.

256 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/664,855Filed 21 Mar 2015
Priority: KR 10-2014-003363321 Mar 2014
Published: US 2015/0271802 A124 Sep 2015
Granted: 5 Sep 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

H04L 5/0092
Signalling for the administration of the divided path, e.g. signalling of configuration information: indication of how the channel is divided
H04L 1/0003
By adapting the transmission rate: by switching between different modulation schemes
H04L 1/0009
Systems modifying transmission characteristics according to link quality, e.g. power backoff: by adapting the channel coding
H04L 1/0026
Characterised by the signalling: transmission of channel quality indication

Family

US 2015/0271802 A1Pre-grant publication · published 24 Sep 2015
US 9,755,814 B2This patent

From the US filing history. Foreign family members aren’t listed.

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Abstract

A method for a base station to transmit data, the method comprising:

receiving Channel State Information (CSI) from a User Equipment;
determining a Transport Block Size (TBS) value based on a TBS table including indices for supporting a 256 quadrature amplitude modulation (QAM) modulation scheme and a number of allocable Physical Resource Block (PRB) pairs;
and
transmitting data using the TBS value,
wherein the TBS table sets TBS indices 27 to 33 for supporting the 256QAM modulation scheme;
and TBS values for supporting the 256QAM modulation scheme in the TBS table are set based on a number of resource elements of a PRB pair, a number of allocable PRB pairs, and a transmission efficiency value for each index;
and
wherein TBS values of the TBS indices 27 to 32 are set by applying a condition that the number of resource elements of the PRB pair is 120;
a TBS value of the TBS index 33 is set by applying a condition that the number of resource elements of the PRB pair is 136;
and the TBS values of the TBS indices 27 to 33 are set by applying a condition that the number of allocable PRB pairs is inclusively between 1 and 110,
wherein a TBS value of the TBS index 28 for supporting the 256QAM modulation scheme in the TBS table is set as shown in the following table
NPRB
1
2
3
4
5
6
7
8
TBS
680
1384
2088
2792
3496
4264
4968
5544
NPRB
9
10
11
12
13
14
15
16
TBS
6200
6968
7736
8504
9144
9912
10680
11064
NPRB
17
18
19
20
21
22
23
24
TBS
11832
12576
13536
14112
14688
15264
16416
16992
NPRB
25
26
27
28
29
30
31
32
TBS
17568
18336
19080
19848
20616
21384
22152
22152
NPRB
33
34
35
36
37
38
39
40
TBS
22920
23688
24496
25456
26416
26416
27376
28336
NPRB
41
42
43
44
45
46
47
48
TBS
29296
29296
30576
30576
31704
32856
32856
34008
NPRB
49
50
51
52
53
54
55
56
TBS
34008
35160
35160
36696
36696
37888
39232
39232
NPRB
57
58
59
60
61
62
63
64
TBS
40576
40576
42368
42368
42368
43816
43816
45352
NPRB
65
66
67
68
69
70
71
72
TBS
45352
46888
46888
46888
48936
48936
48936
51024
NPRB
73
74
75
76
77
78
79
80
TBS
51024
52752
52752
52752
55056
55056
55056
57336
NPRB
81
82
83
84
85
86
87
88
TBS
57336
57336
59256
59256
59256
61664
61664
61664
NPRB
89
90
91
92
93
94
95
96
TBS
61664
63776
63776
63776
66592
66592
66592
66592
NPRB
97
98
99
100
101
102
103
104
TBS
68808
68808
68808
71112
71112
71112
73712
73712
NPRB
105
106
107
108
109
110
TBS
73712
75376
75376
76208
76208
76208.

256 more elements

Facts

Application

14/664,855Filed 21 Mar 2015

Priority

KR 10-2014-003363321 Mar 2014

Published

US 2015/0271802 A124 Sep 2015

Granted

5 Sep 2017

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

H04L 5/0092
Signalling for the administration of the divided path, e.g. signalling of configuration information: indication of how the channel is divided
H04L 1/0003
By adapting the transmission rate: by switching between different modulation schemes
H04L 1/0009
Systems modifying transmission characteristics according to link quality, e.g. power backoff: by adapting the channel coding
H04L 1/0026
Characterised by the signalling: transmission of channel quality indication