Transport block size determination for new radio
A method performed by a wireless transmitter determining a transport block size (TBS) is provided. The method includes determining a TBS using a general function of a number of physical resource blocks (PRBs) to be granted (N_PRB), a number of resource elements (REs) per PRB (N_RE{circumflex over ( )}(DL,PRB)), a number of layers per transport block (ν), a number of bits per modulation (Q_m), and a coding rate determined by a modulation coding scheme (MCS) (R), allocating a transport block of the determined TBS and transmitting the transport block to a wireless receiver. Apparatuses for implementing the method are also provide.
1. A method performed by a wireless transmitter determining a transport block size (TBS), the method comprising:
determining a TBS using a general function of a number of physical resource blocks (PRBs) to be granted (N PRB ), a number of resource elements (REs) per PRB (N RE DL,PRB ), a number of layers per transport block (ν), a number of bits per modulation (Q M ), and a coding rate determined by a modulation coding scheme (MCS) (R), the general function comprises a linear function of N PRB , ν, Q m and R when the product of N PRB , ν, Q m and Ris larger than or equal to a threshold, the general function increases faster than a linear function of N PRB when the product of N PRB , ν, Q m and R is less than the threshold while it is still a linear function of ν, Q m and R, and for a given set of ν, Q m and R, the TBS is a non-decreasing function of N PRB over the range of N PRB ;
allocating a transport block of the determined TBS; and
transmitting the transport block to a wireless receiver.
2. The method of claim 1 , wherein the general function comprises:
f
(
N
PRB
,
v
,
Q
m
,
R
)
=
{
(
A
(
N
PRB
)
2
+
BN
PRB
+
C
)
*
v
*
Q
m
*
R
N
PRB
*
v
*
Q
m
*
R
<
K
N
PRB
*
v
*
Q
m
*
R
N
PRB
*
v
*
Q
m
*
R
≥
K
.
3. The method of claim 1 , wherein the general function comprises:
f
(
N
PRB
,
v
,
Q
m
,
R
)
=
{
(
A
×
log
(
N
PRB
)
+
B
)
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v
*
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m
*
R
N
PRB
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v
*
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m
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<
K
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PRB
*
v
*
Q
m
*
R
N
PRB
*
v
*
Q
m
*
R
≥
K
.
4. A base station for determining a transport block size (TBS), the base station comprising:
power supply circuitry configured to supply power to the base station; and
processing circuitry configured to perform any of the steps of any of claims 1 , 2 and 3 ; and
processing circuitry configured to
perform the determination of a TBS using a general function of a number of physical resource blocks (PRBs) to be granted (N PRB ), a number of resource elements (REs) per PRB (N RE DL,PRB ), a number of layers per transport block (ν), a number processing circuitry configured to perform any of the steps of any of claims 1 , 2 and 3 ; and of bits per modulation (Q M ), and a coding rate determined by a modulation coding scheme (MCS) (R), wherein the general function comprises a linear function of N PRB , ν, Q m and R when the product of N PRB , ν, Q m and Ris larger than or equal to a threshold, the general function increases faster than a linear function of N PRB when the product of N PRB , ν, Q m and R is less than the threshold while it is still a linear function of ν, Q m and R, and for a given set of ν, Q m and R, the TBS is a non-decreasing function of N PRB over the range of N PRB ;
allocate a transport block of the determined TBS; and
transmit the transport block to a wireless receiver.
5. The base station of claim 4 , wherein the processing circuitry configured to perform the determination of a TBS using a general function, wherein the general function includes a linear function of N PRB , ν, Q m and R when the product of N PRB , ν, Q m and R is larger than or equal to a threshold, the general function increases faster than a linear function of N PRB when the product of N PRB , ν, Q m and R is less than the threshold while it is still a linear function of ν, Q m and R, and for a given set of ν, Q m , and R, the TBS is a non-decreasing function of N PRB over the range of N PRB .
6. The base station of claim 5 , wherein the processing circuitry configured to perform the determination of a TBS using a general function, wherein the general function includes
f
(
N
PRB
,
v
,
Q
m
,
R
)
=
{
(
A
(
N
PRB
)
2
+
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PRB
+
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)
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v
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m
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N
PRB
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v
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m
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<
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N
PRB
*
v
*
Q
m
*
R
N
PRB
*
v
*
Q
m
*
R
≥
K
.
7. The base station of claim 5 , wherein the processing circuitry configured to perform the determination of a TBS using a general function, wherein the general function includes
f
(
N
PRB
,
v
,
Q
m
,
R
)
=
{
(
A
×
log
(
N
PRB
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+
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m
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PRB
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<
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m
*
R
N
PRB
*
v
*
Q
m
*
R
≥
K
.
8. A wireless device for determining a transport block size (TBS), the wireless device comprising:
power supply circuitry configured to supply power to the wireless device; and
processing circuitry configured to
perform the determination of a TBS using a general function of a number of physical resource blocks (PRBs) to be granted (N PRB ), a number of resource elements (REs) per PRB (N RE DL,PRB ), a number of layers per transport block (ν), a number processing circuitry configured to perform any of the steps of any of claims 1 , 2 and 3 ; and of bits per modulation (Q M ), and a coding rate determined by a modulation coding scheme (MCS) (R),
wherein the general function comprises a linear function of N PRB , ν, Q m and R when the product of N PRB , ν, Q m and Ris larger than or equal to a threshold, the general function increases faster than a linear function of N PRB when the product of N PRB , ν, Q m and R is less than the threshold while it is still a linear function of ν, Q m and R, and for a given set of ν, Q m and R, the TBS is a non-decreasing function of N PRB over the range of N PRB ;
allocate a transport block of the determined TBS; and
transmit the transport block to a wireless receiver.
9. The wireless device of claim 8 , wherein the processing circuitry configured to perform the determination of a TBS using a general function, wherein the general function includes a linear function of N PRB ν, Q m and R when the product of N PRB , ν, Q m and R is larger than or equal to a threshold, the general function increases faster than a linear function of N PRB when the product of N PRB , ν, Q m and is less than the threshold while it is still a linear function of ν, Q m and R, and for a given set of ν, Q m and R, the TBS is a non-decreasing function of N PRB over the range of N PRB .
10. The wireless device of claim 9 , wherein the processing circuitry configured to perform the determination of a TBS using a general function, wherein the general function includes
f
(
N
PRB
,
v
,
Q
m
,
R
)
=
{
(
A
(
N
PRB
)
2
+
BN
PRB
+
C
)
*
v
*
Q
m
*
R
N
PRB
*
v
*
Q
m
*
R
<
K
N
PRB
*
v
*
Q
m
*
R
N
PRB
*
v
*
Q
m
*
R
≥
K
.
11. The wireless device of claim 9 , wherein the processing circuitry configured to perform the determination of a TBS using a general function, wherein the general function includes
f
(
N
PRB
,
v
,
Q
m
,
R
)
=
{
(
A
×
log
(
N
PRB
)
+
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)
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*
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m
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PRB
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m
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<
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N
PRB
*
v
*
Q
m
*
R
N
PRB
*
v
*
Q
m
*
R
≥
K
.
12. A user equipment (UE) for determining a transport block size (TBS), the UE comprising:
an antenna configured to send and receive wireless signals;
radio front-end circuitry connected to the antenna and to processing circuitry, and configured to condition signals communicated between the antenna and the processing circuitry;
the processing circuitry being configured to
perform the determination of a TBS using a general function of a number of physical resource blocks (PRBs) to be granted (N PRB ), a number of resource elements (REs) per PRB (N RE DL,PRB ), a number of layers per transport block (ν), a number processing circuitry configured to perform any of the steps of any of claims 1 , 2 and 3 ; and of bits per modulation (Q M ), and a coding rate determined by a modulation coding scheme (MCS) (R), wherein the general function comprises a linear function of N PRB , ν, Q m and R when the product of N PRB , ν, Q m and Ris larger than or equal to a threshold, the general function increases faster than a linear function of N PRB when the product of N PRB , ν, Q m and R is less than the threshold while it is still a linear function of ν, Q m and R, and for a given set of ν, Q m and R, the TBS is a non-decreasing function of N PRB over the range of N PRB ;
allocate a transport block of the determined TBS; and
transmit the transport block to a wireless receiver;
an input interface connected to the processing circuitry and configured to allow input of information into the UE to be processed by the processing circuitry;
an output interface connected to the processing circuitry and configured to output information from the UE that has been processed by the processing circuitry; and
a battery connected to the processing circuitry and configured to supply power to the UE.
13. The user equipment of claim 12 , wherein the processing circuitry configured to perform the determination of a TBS using a general function, wherein the general function includes a linear function of N PRB ν, Q m and R when the product of N PRB , ν, Q m and R is larger than or equal to a threshold, the general function increases faster than a linear function of N PRB when the product of N PRB , ν, Q m and R is less than the threshold while it is still a linear function of ν, Q m and R, for a given set of ν, Q m and R, the TBS is a non-decreasing function of N PRB over the range of N PRB .
14. The user equipment of claim 13 , wherein the processing circuitry configured to perform the determination of a TBS using a general function, wherein the general function includes
f
(
N
PRB
,
v
,
Q
m
,
R
)
=
{
(
A
(
N
PRB
)
2
+
BN
PRB
+
C
)
*
v
*
Q
m
*
R
N
PRB
*
v
*
Q
m
*
R
<
K
N
PRB
*
v
*
Q
m
*
R
N
PRB
*
v
*
Q
m
*
R
≥
K
.
15. The user equipment of claim 13 , wherein the processing circuitry configured to perform the determination of a TBS using a general function, wherein the general function includes
f
(
N
PRB
,
v
,
Q
m
,
R
)
=
{
(
A
×
log
(
N
PRB
)
+
B
)
*
v
*
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m
*
R
N
PRB
*
v
*
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m
*
R
<
K
N
PRB
*
v
*
Q
m
*
R
N
PRB
*
v
*
Q
m
*
R
≥
K
.