Methods, apparatus and systems for determining a transport block size in a wireless communication

1. A method performed by a wireless communication device, the method comprising:

receiving control information from a wireless communication node, wherein the control information includes a plurality of transmission parameters related to transport blocks to be transmitted between the wireless communication device and the wireless communication node;

calculating an intermediate transport block size (TBS) for the transport blocks based on the plurality of transmission parameters;

modifying the intermediate TBS to generate a modified TBS; and

determining a final TBS for the transport blocks based on a TBS that is closest to the modified TBS, among TBSs that are in a quantized set.

2. The method of claim 1 , wherein the plurality of transmission parameters comprises:

a modulation order configured for transmission of the transport blocks;

a code rate configured for transmission of the transport blocks; and

a quantity of physical resource blocks configured for transmission of the transport blocks.

3. The method of claim 2 , wherein modifying the intermediate TBS comprises:

determining a correction factor based on: the quantity of physical resource blocks, the modulation order and the code rate; and

modifying the intermediate TBS based on the correction factor to generate the modified TBS.

4. The method of claim 2 , wherein calculating the intermediate TBS comprises:

calculating a multiplication product of: the modulation order, the code rate, a total quantity of resource elements for transmission of the transport blocks, and a quantity of layers configured for transmission of the transport blocks; and

using the multiplication product as the intermediate TBS.

5. The method of claim 1 , wherein the plurality of transmission parameters comprises:

a quantity of physical resource blocks configured for transmission of the transport blocks;

a quantity of resource elements per each physical resource block; and

a total quantity of resource elements for transmission of the transport blocks, which is a product of the quantity of physical resource blocks and the quantity of resource elements per physical resource block.

6. The method of claim 5 , wherein modifying the intermediate TBS comprises:

determining a modified quantity of resource elements based on the total quantity of resource elements; and

using the modified quantity of resource elements in the calculation of the intermediate TBS to generate the modified TBS.

7. The method of claim 1 , wherein modifying the intermediate TBS comprises:

dividing the intermediate TBS by a quantization step to generate a quotient;

rounding down the quotient to generate an integer; and

multiplying the integer by the quantization step to generate the modified TBS.

8. The method of claim 7 , wherein:

the quantization step is determined based on 2 to the power of the quotient; and

the quotient is not smaller than 3 and is not larger than 10.

9. A method performed by a wireless communication node, the method comprising:

generating a plurality of transmission parameters related to transport blocks;

transmitting control information that comprises the plurality of transmission parameters;

calculating an intermediate transport block size (TBS) for the transport blocks based on the plurality of transmission parameters;

modifying the intermediate TBS to generate a modified TBS;

determining a final TBS for the transport blocks based on a TBS that is closest to the modified TBS, among TBSs that are in a quantized set; and

communicating with a wireless communication device using the transport blocks based on the final TBS.

10. The method of claim 9 , wherein the plurality of transmission parameters comprises:

a modulation order configured for transmission of the transport blocks;

a code rate configured for transmission of the transport blocks; and

a quantity of physical resource blocks configured for transmission of the transport blocks.

11. The method of claim 10 , wherein modifying the intermediate TBS comprises:

determining a correction factor based on: the quantity of physical resource blocks, the modulation order and the code rate; and

modifying the intermediate TBS based on the correction factor to generate the modified TBS.

12. The method of claim 10 , wherein calculating the intermediate TBS comprises:

calculating a multiplication product of: the modulation order, the code rate, a total quantity of resource elements for transmission of the transport blocks, and a quantity of layers configured for transmission of the transport blocks; and

using the multiplication product as the intermediate TBS.

13. The method of claim 9 , wherein the plurality of transmission parameters comprises:

a quantity of physical resource blocks configured for transmission of the transport blocks;

a quantity of resource elements per each physical resource block; and

a total quantity of resource elements for transmission of the transport blocks, which is a product of the quantity of physical resource blocks and the quantity of resource elements per physical resource block.

14. The method of claim 13 , wherein modifying the intermediate TBS comprises:

determining a modified quantity of resource elements based on the total quantity of resource elements; and

using the modified quantity of resource elements in the calculation of the intermediate TBS to generate the modified TBS.

15. The method of claim 9 , wherein modifying the intermediate TBS comprises:

dividing the intermediate TBS by a quantization step to generate a quotient;

rounding down the quotient to generate an integer; and

multiplying the integer by the quantization step to generate the modified TBS.

16. The method of claim 15 , wherein:

the quantization step is determined based on 2 to the power of the quotient; and

the quotient is not smaller than 3 and is not larger than 10.

17. A wireless communication device comprising a processor and a memory, wherein the memory stores instructions that, when executed, causes the processor to perform:

receiving control information from a wireless communication node, wherein the control information includes a plurality of transmission parameters related to transport blocks to be transmitted between the wireless communication device and the wireless communication node;

calculating an intermediate transport block size (TBS) for the transport blocks based on the plurality of transmission parameters;

modifying the intermediate TBS to generate a modified TBS; and

determining a final TBS for the transport blocks based on a TBS that is closest to the modified TBS, among TBSs that are in a quantized set.

18. A wireless communication node comprising a processor and a memory, wherein the memory stores instructions that, when executed, causes the processor to perform:

generating a plurality of transmission parameters related to transport blocks;

transmitting control information that comprises the plurality of transmission parameters;

calculating an intermediate transport block size (TBS) for the transport blocks based on the plurality of transmission parameters;

modifying the intermediate TBS to generate a modified TBS;

determining a final TBS for the transport blocks based on a TBS that is closest to the modified TBS, among TBSs that are in a quantized set; and

communicating with a wireless communication device using the transport blocks based on the final TBS.

19. A method performed by a wireless communication device, the method comprising:

receiving control information from a wireless communication node, wherein the control information includes a plurality of transmission parameters configured for transmission of transport blocks between the wireless communication device and the wireless communication node;

calculating an intermediate transport block size (TBS) for the transport blocks based on the plurality of transmission parameters, wherein the plurality of transmission parameters comprises: a modulation order, a code rate, and a quantity of physical resource blocks;

determining a modified code rate based on: the quantity of physical resource blocks, the modulation order and the code rate;

replacing the code rate with the modified code rate in the calculation of the intermediate TBS to generate a modified TBS; and

determining a final TBS for the transport blocks based on the modified TBS.

20. The method of claim 19 , wherein:

the final TBS for the transport blocks is determined based on a TBS that is closest to the modified TBS, among TBSs that are in a quantized set and not smaller than the modified TBS.