Method and apparatus for transport block signaling in a wireless communication system
View Patent ↗A method and apparatus for generating a single statically defined downlink reference MCS table consisting of transport block sizes (TBSs) computed for 29 MCSs for each of j PRBs where j=1, . . . , N RB DL . Three entries of the MCS table are reserved for implicit modulation order signaling (e.g. in the downlink) or implicit redundancy version signaling (e.g. in the uplink). Each MCS entry in the table is populated by a TBS and the table entries are accessed based on a 5-bit MCS index and resource allocation information, indicating the number of PRBs is signaled via a scheduling message which may be a grant or assignment message. A grant or assignment message may further include a 5-bit MCS field for each transport block which, along with the resource allocation information, enables the UE to determine the scheduled TBS.
1. A method of operating a mobile station comprising:
receiving a time-frequency resource assignment and an index; and
determining a transport block size (TBS) value based on said time-frequency resource assignment and said index by accessing a table stored in said mobile station,
the table comprising a plurality of TBS values, each TBS value dependent on a corresponding number of resource blocks (RBs) based on the time-frequency resource assignment and a corresponding TBS index,
wherein accessing the table includes using a TBS index and a number of RBs to select from the table at least one of the following TBS values
TBS
1
2
3
4
5
6
7
8
9
10
Index
RB
RBs
RBs
RBs
RBs
RBs
RBs
RBs
RBs
RBs
0
16
32
56
88
120
152
176
1
24
48
120
344
2
32
72
120
296
376
424
3
40
104
152
272
392
440
504
568
4
120
200
488
552
632
696
5
72
152
504
600
680
776
872
6
80
176
288
504
600
712
808
936
1032
7
104
232
584
712
840
968
1096
1224
8
120
248
536
680
808
968
1096
1256
1384
9
136
296
456
616
776
936
1096
1256
1416
1544
10
320
680
872
1032
1224
1384
1544
1736
11
176
376
584
776
1000
1192
1384
1608
1800
2024
12
208
440
680
904
1128
1352
1608
1800
2024
2280
13
488
744
1000
1256
1544
1800
2024
2280
2536
14
552
840
1128
1416
1736
1992
2280
2600
2856
15
280
600
904
1224
1544
1800
2152
2472
2728
3112
16
632
968
1288
1608
1928
2280
2600
2984
3240
17
336
696
1064
1416
1800
2152
2536
2856
3240
3624
18
376
776
1160
1544
1992
2344
2792
3112
3624
4008
19
408
840
1288
1736
2152
2600
2984
3496
3880
4264
20
440
904
1384
1864
2344
2792
3240
3752
4136
4584
21
488
1000
1480
1992
2472
2984
3496
4008
4584
4968
22
520
1064
1608
2152
2664
3240
3752
4264
4776
5352
23
552
1128
1736
2280
2856
3496
4008
4584
5160
5736
24
584
1192
1800
2408
2984
3624
4264
4968
5544
5992
25
616
1256
1864
2536
3112
3752
4392
5160
5736
6200
26.
2. The method of claim 1 , wherein at least some of the TBS values along with transport block cyclic redundancy check (CRC) parity bits are divided into a plurality of code blocks of substantially equal size when code block segmentation is applied.
3. The method of claim 2 , wherein each code block has additional code block CRC parity bits.
4. The method of claim 1 , wherein at least some of the TBS values along with transport block cyclic redundancy check (CRC) parity bits are divided into a plurality of code blocks of equal size when code block segmentation is applied.
5. The method of claim 1 , wherein said table includes a modulation and coding scheme index column.
6. The method of claim 5 , wherein said modulation and coding scheme index column uses a five bit index.
7. The method of claim 1 , receiving the time-frequency resource assignment and the index in a scheduling message and determining said TBS index from said index.
8. The method of claim 1 , wherein said index is a modulation and coding scheme (MCS) index and said table includes TBS values for 29 modulation and coding scheme indices for each number of resource blocks.
9. The method of claim 1 , wherein a modulation order is determined as follows:
Index
Modulation Order
0
2
1
2
2
2
3
2
4
2
5
2
6
2
7
2
8
2
9
2
10
4
11
4
12
4
13
4
14
4
15
4
16
4
17
6
18
6
19
6
20
6
21
6
22
6
23
6
24
6
25
6
26
6
27
6
28
6
29
2
30
4
31
6.
10. The method of claim 1 , wherein transport blocks corresponding to at least some of said TBS values in said table comprise a plurality of code blocks, and wherein said TBS values are selected such that no filler bits are added to the beginning of each of the plurality of the code blocks.
11. A wireless communication device comprising;
a transport block determination component, operative to:
receive a time-frequency resource assignment and an index; and
determine a transport block size (TBS) value based on said time-frequency resource assignment and said index by accessing a memory of said mobile station, said memory including a plurality of TBS values, each TBS value dependent on a corresponding number of resource blocks (RBs) based on the time-frequency resource assignment and a corresponding TBS index,
wherein accessing the memory includes using a TBS index and a number of RBs to select at least one of the following TBS values:
TBS
1
2
3
4
5
6
7
8
9
10
Index
RB
RBs
RBs
RBs
RBs
RBs
RBs
RBs
RBs
RBs
0
16
32
56
88
120
152
176
1
24
48
120
344
2
32
72
120
296
376
424
3
40
104
152
272
392
440
504
568
4
120
200
488
552
632
696
5
72
152
504
600
680
776
872
6
80
176
288
504
600
712
808
936
1032
7
104
232
584
712
840
968
1096
1224
8
120
248
536
680
808
968
1096
1256
1384
9
136
296
456
616
776
936
1096
1256
1416
1544
10
320
680
872
1032
1224
1384
1544
1736
11
176
376
584
776
1000
1192
1384
1608
1800
2024
12
208
440
680
904
1128
1352
1608
1800
2024
2280
13
488
744
1000
1256
1544
1800
2024
2280
2536
14
552
840
1128
1416
1736
1992
2280
2600
2856
15
280
600
904
1224
1544
1800
2152
2472
2728
3112
16
632
968
1288
1608
1928
2280
2600
2984
3240
17
336
696
1064
1416
1800
2152
2536
2856
3240
3624
18
376
776
1160
1544
1992
2344
2792
3112
3624
4008
19
408
840
1288
1736
2152
2600
2984
3496
3880
4264
20
440
904
1384
1864
2344
2792
3240
3752
4136
4584
21
488
1000
1480
1992
2472
2984
3496
4008
4584
4968
22
520
1064
1608
2152
2664
3240
3752
4264
4776
5352
23
552
1128
1736
2280
2856
3496
4008
4584
5160
5736
24
584
1192
1800
2408
2984
3624
4264
4968
5544
5992
25
616
1256
1864
2536
3112
3752
4392
5160
5736
6200
26.
12. The device of claim 11 , wherein the memory is coupled to said transport block determination component, and said memory includes a statically defined downlink reference table including TBS values for a plurality of modulation and coding scheme indices for each of a plurality of time-frequency resource blocks.
13. The device of claim 11 , wherein at least some of the TBS values along with transport block cyclic redundancy check (CRC) parity bits are divided into a plurality of code blocks of substantially equal size when code block segmentation is applied.
14. The device of claim 11 , wherein at least some of the TBS values along with transport block cyclic redundancy check (CRC) parity bits are divided into a plurality of code blocks of equal size when code block segmentation is applied.
15. The device of claim 14 , wherein no filler bits are added to the beginning of the plurality of code blocks during code block segmentation.
16. The device of claim 14 , wherein each code block has additional CRC parity bit code blocks.
17. The device of claim 11 , wherein said transport block determination component is further operative to access said memory using a five bit index and wherein said memory includes a modulation and coding scheme index column that uses said five bit index.
18. The device of claim 11 , wherein said wireless communication device is operative to receive the time-frequency resource assignment and the index in a scheduling message and said transport block determination component is operative to determine said TBS index from said index.
19. The device of claim 11 , wherein said transport block determination component is further operative to access said memory and said memory includes TBS values for 29 modulation and coding scheme indices for each number of resource blocks.
20. The apparatus of claim 11 , wherein the transport blocks corresponding to at least some of said TBS values in said memory comprise a plurality of code blocks, and wherein said TBS values are selected such that no filler bits are added to the beginning of the each of plurality of the code blocks.
21. A base transceiver station comprising:
a transport block allocation component, operative to:
send a time-frequency resource assignment and an index to at least one mobile station wherein said index corresponds to a transport block size (TBS) index stored in a memory of said base transceiver station,
said memory including a plurality of TBS values dependent on a corresponding number of resource blocks based on the time-frequency resource assignment and a corresponding TBS index, wherein said transport block allocation component is operative to access from the memory, using a TBS index and a number RBs, at least one of the following TBS values:
TBS Index
1RBs
2RBs
3RBs
4RBs
5RBs
6RBs
7RBs
8RBs
9RBs
10RBs
0
16
32
56
88
120
152
176
1
24
48
120
344
2
32
72
120
296
376
424
3
40
104
152
272
392
440
504
568
4
120
200
488
552
632
696
5
72
152
504
600
680
776
872
6
80
176
288
504
600
712
808
936
1032
7
104
232
584
712
840
968
1096
1224
8
120
248
536
680
808
968
1096
1256
1384
9
136
296
456
616
776
936
1096
1256
1416
1544
10
320
680
872
1032
1224
1384
1544
1736
11
176
376
584
776
1000
1192
1384
1608
1800
2024
12
208
440
680
904
1128
1352
1608
1800
2024
2280
13
488
744
1000
1256
1544
1800
2024
2280
2536
14
552
840
1128
1416
1736
1992
2280
2600
2856
15
280
600
904
1224
1544
1800
2152
2472
2728
3112
16
632
968
1288
1608
1928
2280
2600
2984
3240
17
336
696
1064
1416
1800
2152
2536
2856
3240
3624
18
376
776
1160
1544
1992
2344
2792
3112
3624
4008
19
408
840
1288
1736
2152
2600
2984
3496
3880
4264
20
440
904
1384
1864
2344
2792
3240
3752
4136
4584
21
488
1000
1480
1992
2472
2984
3496
4008
4584
4968
22
520
1064
1608
2152
2664
3240
3752
4264
4776
5352
23
552
1128
1736
2280
2856
3496
4008
4584
5160
5736
24
584
1192
1800
2408
2984
3624
4264
4968
5544
5992
25
616
1256
1864
2536
3112
3752
4392
5160
5736
6200
26.