US 2022/0104232 A1 · Corrections to Limited Buffer Rate-Matching Restriction

Abstract

Embodiments include methods, performed by a user equipment (UE), for receiving downlink (DL) data from a serving cell in a wireless network. Such methods include determining whether a total number of coded bits for all transport blocks (TBs) scheduled for the UE, by the wireless network in the serving cell during a plurality of consecutive symbols, is greater than a limited-buffer rate-matching (LBRM) threshold. The LBRM threshold is based on a maximum number of transmission layers, X, associated with the UE for the serving cell. Such methods also include receiving and decoding a plurality of TBs, comprising one or more DL data messages, when the total number of coded bits for all TBs (including the plurality of TBs) scheduled for the UE is not greater than the LBRM threshold. Other embodiments include complementary methods performed by network nodes, and UEs and network nodes configured to perform such methods.

Claims22

Dependent claims

-30. (canceled)

A method performed by a user equipment (UE) for receiving a physical downlink shared channel (PDSCH) transmission from a serving cell in a wireless network, the method comprising:

receiving a PDSCH transmission from the serving cell on an active bandwidth part (BWP);
decoding a plurality of transport blocks (TBs) partially or fully contained within a duration of a plurality of consecutive symbols ending at a last symbol of the PDSCH transmission, when a limited-buffer rate-matching (LBRM) condition is not satisfied, wherein the LBRM condition is:
2
max
⁡
(
0
,
μ
-
μ
′
)
.
∑
i
∈
S
⁢
⌊
C
i
′
L
i
⌋
⁢
x
i
.
F
i
>
ceil
⁡
(
X
4
)
.
1
R
L
⁢
B
⁢
R
⁢
M
.
T
⁢
B
⁢
S
L
⁢
B
⁢
R
⁢
M
where:
RLBRM=2/3, TBSLBRM is an LBRM transport block size and X is a maximum number of transmission layers associated with the UE for the serving cell;
S is a set of all TBs scheduled for the UE on physical downlink shared channels (PDSCHs) that are at least partially included in the plurality of consecutive symbols, and i is an index to an i-th TB within S;
Ci′ is a number of scheduled code blocks for the i-th TB;
Li is a number of orthogonal frequency-division multiplexing (OFDM) symbols assigned to the PDSCH for the i-th TB;
xi is a number of OFDM symbols of the PDSCH that are included in the plurality of consecutive symbols;
F
i
=
max
j
=
0
,
…
⁢
,
J
-
1
⁢
(
min
⁡
(
k
0
,
i
j
+
E
i
j
,
N
c
⁢
b
,
i
)
)
,
where k0,ij is the starting location of a redundancy version (RV) for the jth transmission, Eij=min(Er) of the scheduled code blocks for the jth transmission, where Er is a rate matching output sequence length for the r-th coded block, Ncb,i is a circular buffer length;
μ corresponds to a subcarrier spacing of an active bandwidth part (BWP);
and
μ′ corresponds to the subcarrier spacing of a configured BWP having the largest number of configured physical resource blocks;
and
wherein X is greater than four.

109 more elements

A method performed by a network node for a serving cell in a wireless network for transmitting a physical downlink shared channel (PDSCH) transmission to a user equipment (UE), the method comprising:

transmitting, to the UE, a plurality of transport blocks (TBs) partially or fully contained within a duration of a plurality of consecutive symbols ending at a last symbol of a PDSCH transmission, when a limited-buffer rate-matching (LBRM) condition is not satisfied, wherein the LBRM condition is:
2
max
⁡
(
0
,
μ
-
μ
′
)
.
∑
i
∈
S
⁢
⌊
C
i
′
L
i
⌋
⁢
x
i
.
F
i
>
ceil
⁡
(
X
4
)
.
1
R
L
⁢
B
⁢
R
⁢
M
.
T
⁢
B
⁢
S
L
⁢
B
⁢
R
⁢
M
where:
RLBRM=2/3, TBSLBRM is an LBRM transport block size and X is a maximum number of transmission layers associated with the UE for the serving cell;
S is a set of all TBs scheduled for the UE on physical downlink shared channels (PDSCHs) that are at least partially included in the plurality of consecutive symbols, and i is an index to an i-th TB within S;
Ci′ is a number of scheduled code blocks for the i-th TB;
Li is a number of orthogonal frequency-division multiplexing, OFDM, symbols assigned to the PDSCH for the i-th TB;
xi is a number of OFDM symbols of the PDSCH that are included in the plurality of consecutive symbols;
F
i
=
max
j
=
0
,
…
⁢
,
J
-
1
⁢
(
min
⁡
(
k
0
,
i
j
+
E
i
j
,
N
c
⁢
b
,
i
)
)
,
where k0,ij is the starting location of a redundancy version (RV) for the jth transmission, Eij=min(Er) of the scheduled code blocks for the jth transmission, where Er is a rate matching output sequence length for the r-th coded block, Ncb,i is a circular buffer length;
μ corresponds to a subcarrier spacing of an active bandwidth part (BWP);
and
μ′ corresponds to the subcarrier spacing of a configured BWP having the largest number of configured physical resource blocks;
and
wherein X is greater than four.

108 more elements

A user equipment (UE) configured to receive a physical downlink shared channel (PDSCH) from a serving cell in a wireless network, the UE comprising:

radio transceiver circuitry configured to communicate with a network node in the wireless network;
and
processing circuitry operatively coupled to the radio transceiver circuitry, whereby the processing circuitry and the radio transceiver circuitry are configured to:
receive a PDSCH transmission from the serving cell on an active bandwidth part (BWP);
decode a plurality of transport blocks (TBs) partially or fully contained within a duration of a plurality of consecutive symbols ending at a last symbol of the PDSCH transmission, when a limited-buffer rate-matching (LBRM) condition is not satisfied, wherein the LBRM condition is:
2
max
⁡
(
0
,
μ
-
μ
′
)
.
∑
i
∈
S
⁢
⌊
C
i
′
L
i
⌋
⁢
x
i
.
F
i
>
ceil
⁡
(
X
4
)
.
1
R
L
⁢
B
⁢
R
⁢
M
.
T
⁢
B
⁢
S
L
⁢
B
⁢
R
⁢
M
where:
RLBRM=2/3, TBSLBRM is an LBRM transport block size and X is a maximum number of transmission layers associated with the UE for the serving cell;
S is a set of all TBs scheduled for the UE on physical downlink shared channels (PDSCHs) that are at least partially included in the plurality of consecutive symbols, and i is an index to an i-th TB within S;
Ci′ is a number of scheduled code blocks for the i-th TB;
Li is a number of orthogonal frequency-division multiplexing (OFDM) symbols assigned to the PDSCH for the i-th TB;
xi is a number of OFDM symbols of the PDSCH that are included in the plurality of consecutive symbols;
F
i
=
max
j
=
0
,
…
⁢
,
J
-
1
⁢
(
min
⁡
(
k
0
,
i
j
+
E
i
j
,
N
c
⁢
b
,
i
)
)
,
where k0,ij is the starting location of a redundancy version (RV) for the jth transmission, Eij=min(Er) of the scheduled code blocks for the jth transmission, where Er is a rate matching output sequence length for the r-th coded block, Ncb,i is a circular buffer length;
μ corresponds to a subcarrier spacing of an active bandwidth part (BWP);
and
μ′ corresponds to the subcarrier spacing of a configured BWP having the largest number of configured physical resource blocks;
and
wherein X is greater than four.

112 more elements

A network node configured for transmitting a physical downlink shared channel (PDSCH) to a user equipment (UE) in a cell of a wireless network, the network node comprising:

radio network interface circuitry configured to communicate with the UE;
and
processing circuitry operatively coupled to the radio network interface circuitry, whereby the processing circuitry and the radio network interface circuitry are configured to:
transmit, to the UE, a plurality of transport blocks (TBs) partially or fully contained within a duration of a plurality of consecutive symbols ending at a last symbol of a PDSCH transmission, when a limited-buffer rate-matching (LBRM) condition is not satisfied, wherein the LBRM condition is:
2
max
⁡
(
0
,
μ
-
μ
′
)
.
∑
i
∈
S
⁢
⌊
C
i
′
L
i
⌋
⁢
x
i
.
F
i
>
ceil
⁡
(
X
4
)
.
1
R
L
⁢
B
⁢
R
⁢
M
.
T
⁢
B
⁢
S
L
⁢
B
⁢
R
⁢
M
where:
RLBRM=2/3, TBSLBRM is an LBRM transport block size and X is a maximum number of transmission layers associated with the UE for the serving cell;
S is a set of all TBs scheduled for the UE on physical downlink shared channels (PDSCHs) that are at least partially included in the plurality of consecutive symbols, and i is an index to an i-th TB within S;
Ci′ is a number of scheduled code blocks for the i-th TB;
Li is a number of orthogonal frequency-division multiplexing, OFDM, symbols assigned to the PDSCH for the i-th TB;
xi is a number of OFDM symbols of the PDSCH that are included in the plurality
F
i
=
max
j
=
0
,
…
⁢
,
J
-
1
⁢
(
min
⁡
(
k
0
,
i
j
+
E
i
j
,
N
c
⁢
b
,
i
)
)
,
where k0,ij is the starting location of a redundancy version (RV) for the jth transmission, Eij=min(Er) of the scheduled code blocks for the jth transmission, where Er is a rate matching output sequence length for the r-th coded block, Ncb,i is a circular buffer length;
μ corresponds to a subcarrier spacing of an active bandwidth part (BWP);
and
μ′ corresponds to the subcarrier spacing of a configured BWP having the largest number of configured physical resource blocks;
and
wherein X is greater than four.

111 more elements

Dependencies are inferred from the claim text.

Corrections to Limited Buffer Rate-Matching Restriction

Life of this patent

Corrections to Limited Buffer Rate-Matching Restriction

Life of this patent

Abstract

Claims22