Wireless communications method and apparatus
A wireless communication method is provided. The method includes: determining, by a terminal device, a first coefficient, where the first coefficient belongs to a first coefficient set corresponding to a first transmission time interval TTI, the first coefficient set includes N coefficients, N≥2, and the N coefficients include at least two coefficients used for uplink transmission in the first TTI, or at least two coefficients used for downlink transmission in the first TTI; determining, by the terminal device, a first transport block size TBS based on the first coefficient; and performing, by the terminal device, wireless communication based on the first TBS in the first TTI. Reliability and accuracy of wireless communication can be improved.
1. A wireless communication method comprising:
determining, by a terminal, a coefficient k associated with a transmission time interval (TTI), wherein a quantity of symbols in the TTI is less than or equal to 7;
determining, by the terminal, a soft buffer upper limit value N # A associated with the TTI according to the coefficient k; and
performing, by the terminal, downlink data communication based on the soft buffer upper limit N # A in the TTI,
wherein the coefficient k is determined based on the quantity of symbols included in the TTI, and the soft buffer upper limit value N # A meets the following formula:
N
#
A
=
⌊
k
·
N
soft
K
C
·
K
MIMO
·
min
(
M
DL_HARQ
,
M
limit
)
⌋
,
wherein
N soft is a total soft buffer value, K C is a fixed value related to the total soft buffer value and a maximum quantity of supported layers, M DL_HARQ is a maximum quantity of downlink hybrid automatic repeat request (HARQ) processes, M limit is a constant whose value is 8, and K MIMO is 1 or 2, and k is a positive number less than 1.
2. The method according to claim 1 , wherein the TTI consists of 2 symbols and the coefficient is 1/6.
3. An apparatus comprising:
at least one processor configured to
determine a coefficient k associated with a transmission time interval (TTI), wherein a quantity of symbols in the TTI is less than or equal to 7, and
determine a soft buffer upper limit value N # A associated with the TTI according to the coefficient k; and
a transceiver configured to cooperate with the at least one processor to perform downlink data communication based on the soft buffer upper limit N # A in the TTI,
wherein the coefficient k is determined based on the quantity of symbols included in the TTI, and the soft buffer upper limit value N # A meets the following formula:
N
#
A
=
⌊
k
·
N
soft
K
C
·
K
MIMO
·
min
(
M
DL_HARQ
,
M
limit
)
⌋
,
wherein,
N soft is a total soft buffer value, K C is a fixed value related to the total soft buffer value and a maximum quantity of supported layers, M DL_HARQ is a maximum quantity of downlink hybrid automatic repeat request (HARQ) processes, M limit is a constant whose value is 8, and K MIMO is 1 or 2, and k is a positive number less than 1.
4. The apparatus according to claim 3 , wherein the TTI consists of 2 symbols and the coefficient is 1/6.
5. The apparatus according to claim 3 , wherein the apparatus is a terminal device.
6. The apparatus according to claim 3 , wherein the apparatus is a network device.
7. A non-transitory computer readable storage medium comprising processor-executable instructions, which when executed by a processor of a computer, cause the computer to implement:
determining a coefficient k associated with a transmission time interval (TTI), wherein a quantity of symbols in the TTI is less than or equal to 7;
determining a soft buffer upper limit value N # A associated with the TTI according to the coefficient k; and
performing downlink data communication based on the soft buffer upper limit N # A in the TTI,
wherein the coefficient k is determined based on the quantity of symbols included in the TTI, and the soft buffer upper limit value N # A meets the following formula:
N
#
A
=
⌊
k
·
N
soft
K
C
·
K
MIMO
·
min
(
M
DL_HARQ
,
M
limit
)
⌋
,
wherein
N soft is a total soft buffer value, K C is a fixed value related to the total soft buffer value and a maximum quantity of supported layers, M DL_HARQ is a maximum quantity of downlink hybrid automatic repeat request (HARQ) processes, M limit is a constant whose value is 8, and K MIMO is 1 or 2, and k is a positive number less than 1.
8. The non-transitory computer readable storage medium according to claim 7 , wherein the TTI consists of 2 symbols and the coefficient is ⅙.