Terminal apparatus, base station apparatus, and communication method
A terminal apparatus includes a receiver configured to receive a transport block, and a decoding unit configured to decode the plurality of first code blocks, in which each of the plurality of first code blocks is coded based on a soft buffer size, the soft buffer size is given based on at least a first value, the first value is the number of the plurality of first code blocks in an initial transmission of the transport block, the number of the plurality of first code blocks is given based on a size of the transport block, the size of the transport block is given based on at least an MCS field included in the downlink control information, in a case that at least one second code block is retransmitted, the first value is the number of the at least one second code block, and the at least one second code block includes some code blocks of the plurality of first code blocks resulting from the segmentation.
1. A terminal apparatus comprising:
reception circuitry configured to receive a transport block, based on a downlink control information (DCI) format, the transport block being subjected to segmentation into a plurality of code blocks;
decoding circuitry configured to decode the plurality of code blocks, wherein
each of the plurality of code blocks is coded based on a size of a soft buffer N cb ,
in a case of an initial transmission of the transport block, the size of the soft buffer N cb is given by
N
cb
=
min
(
⌊
N
IR
N
CB
1
⌋
,
K
w
)
,
N IR being a value associated with the size of the soft buffer, N CB1 being a quantity of the plurality of code blocks, and K w being a quantity of coded bits of the transport block,
the quantity of the plurality of code blocks is given based on a size of the transport block,
the size of the transport block is given based at least on a Modulation and Coding Scheme (MCS) field included in the DCI format,
in a case that first code blocks in the plurality of code blocks are transmitted in a retransmission of the transport block and at least one second code block in the plurality of code blocks is not transmitted in the retransmission, the size of the soft buffer N cb is given by
N
cb
=
min
(
⌊
N
IR
N
CB
2
⌋
,
K
w
)
,
N CB2 being a quantity of the first code blocks.
2. A communication method for a terminal apparatus, the communication method comprising:
receiving a transport block, based on a downlink control information (DCI) format, the transport block being subjected to segmentation into a plurality of code blocks; and
decoding the plurality of code blocks, wherein
each of the plurality of code blocks is coded based on a size of a soft buffer N cb ,
in a case of an initial transmission of the transport block, the size of the soft buffer N cb is given by
N
cb
=
min
(
⌊
N
IR
N
CB
1
⌋
,
K
w
)
,
N IR being a value associated with the size of the soft buffer, N CB1 being a quantity of the plurality of code blocks, and K w being a quantity of coded bits of the transport block,
the quantity of the plurality of code blocks is given based on a size of the transport block,
the size of the transport block is given based at least on a Modulation and Coding Scheme (MCS) field included in the DCI format,
in a case that first code blocks in the plurality of code blocks are transmitted in a retransmission of the transport block and at least one second code block in the plurality of code blocks is not transmitted in the retransmission, the size of the soft buffer N cb is given by
N
cb
=
min
(
⌊
N
IR
N
CB
2
⌋
,
K
w
)
,
N CB2 being a quantity of the first code blocks.