US2023389020A1PendingUtilityA1
Corrections to Limited Buffer Rate-Matching Restriction
Est. expiryFeb 15, 2039(~12.5 yrs left)· nominal 20-yr term from priority
Inventors:Ajit Nimbalker
H04W 72/1273H04L 1/0067H04L 27/26025H04W 72/044H04L 27/2607H04L 1/0041H04L 1/0045H04L 1/1854H04L 1/1864
73
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Claims
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.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1 . A method, performed by a user equipment (UE) for receiving downlink (DL) data from a serving cell in a wireless network, the method comprising:
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; and 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, is not greater than the LBRM threshold, wherein the LBRM threshold is based on a maximum number of transmission layers (X) associated with the UE for the serving cell.
2 . The method of claim 1 , wherein X is greater than four.
3 . The method of claim 1 , wherein receiving and decoding the plurality of TBs comprises:
receiving a first TB via one or more first transmission layers; receiving a second TB via one or more second transmission layers; and decoding the respective rust and second TBs.
4 . The method of claim 1 , further comprising, refraining from receiving and decoding the plurality of TBs when the total number of coded bits for all TBs is greater than the LBRM threshold.
5 . The method of claim 1 , wherein:
the LBRM threshold is determined according to
Q
·
1
R
LBRM
·
T
LBRM
;
Q is determined based on ceil(X/4);
R LBRM is an LBRM code rate; and
TBS LBRM is an LBRM transport block size.
6 . The method of claim 5 , wherein Q=ceil(X/4).
7 . The method of claim 5 , wherein the plurality of TBs are received and decoded based on R LBRM and TBS LBRM .
8 . The method of claim 5 , wherein Q is determined based on a lookup table relating a plurality of values of X to respective values of Q.
9 . The method of claim 1 , wherein the total number of coded bits for all TBs scheduled for the UE, by the wireless network in the serving cell during the plurality of consecutive symbols, is determined according to:
2
max
(
0
,
μ
-
μ
′
)
·
∑
i
∈
S
⌊
C
i
′
L
i
⌋
x
i
·
F
i
wherein:
S is a set of all TBs scheduled for the UE on physical data channels that are at least partially included in the plurality of consecutive symbols, and i is an index to an i-th TB within S;
C i ′ is a number of scheduled code blocks for the i-th TB;
L i is a number of orthogonal frequency-division multiplexing, OFDM, symbols assigned to physical data channel for the i-th TB;
x i is a number of OFDM symbols of a physical data channel that are included in the plurality of consecutive symbols;
F i is a factor related to a position of the i-th TB in a circular buffer of the UE; and
μ-μ′ is a difference between numerologies of the UE's active bandwidth part, BWP, and the UE's configured BWP having the largest number of configured physical resource blocks or the largest subcarrier spacing.
10 . The method of claim 1 , wherein the plurality of TBs, comprising the one or more DL data messages, constitute all TBs scheduled for the UE by the wireless network in the serving cell during the plurality of consecutive symbols.
11 . The method of claim 1 , wherein X is given by:
a higher-layer parameter maxMIMO-Layers of the serving cell, when the higher-layer parameter has been configured for the UE by the wireless network; and the maximum number of layers for physical downlink shared channel, PDSCH, supported by the UE for the serving cell, when the higher-layer parameter has not been configured for the UE by the wireless network.
12 . A method, performed by a network node for a serving cell in a wireless network, for downlink (DL) data transmission to a user equipment (UE), the method comprising:
determining a limited-buffer rate-matching (LBRM) threshold for the UE based on a maximum number of transmission layers (X) associated with the UE for the serving cell; and encoding and transmitting, to the UE, a plurality of transport blocks (TBs) comprising one or more DL data messages such that a total number of coded bits for all TBs scheduled for the UE, in the serving cell during a plurality of consecutive symbols, is not greater than the LBRM threshold,
wherein the total number of coded bits includes coded bits for the plurality of TBs.
13 . The method of claim 12 , wherein X is greater than four.
14 . The method of claim 12 , wherein encoding and transmitting the plurality of TBs comprises determining sizes of the plurality of TBs such that the total number of coded bits for all TBs is not greater than the LBRM threshold.
15 . The method of claim 12 , wherein encoding and transmitting the plurality of TBs comprises:
encoding and transmitting a first TB via one or more first transmission layers; and encoding and transmitting a second TB via one or more second transmission layers.
16 . The method of claim 12 , wherein:
the LBRM threshold is determined according to
Q
·
1
R
LBRM
·
T
LBRM
;
Q is determined based on ceil(X/4);
R LBRM is an LBRM code rate; and
R LBRM is an LBRM transport block size.
17 . The method of claim 16 , wherein Q=ceil(X/4).
18 . The method of claim 16 , wherein the plurality of TBs are encoded and transmitted based on R LBRM and TBS LBRM .
19 . The method of claim 16 , wherein Q is determined based on a lookup table relating a plurality of values of X to respective values of Q.
20 . The method of claim 12 , wherein the total number of coded bits for all TBs scheduled for the UE, in the serving cell during a plurality of consecutive symbols, is determined according to:
2
max
(
0
,
μ
-
μ
′
)
·
∑
i
∈
S
⌊
C
i
′
L
i
⌋
x
i
·
F
i
wherein:
S is a set of all TBs scheduled for the UE on physical data channels that are at least partially included in the plurality of consecutive symbols, and i is an index to an i-th TB within S;
C i ′ is a number of scheduled code blocks for the i-th TB;
L i is a number of orthogonal frequency-division multiplexing, OFDM, symbols assigned to a physical data channel for the i-th TB;
x i is a number of OFDM symbols of the physical data channel that are included in the plurality of consecutive symbols;
F i is a factor related to a position of the i-th TB in a circular buffer of the UE; and
μ-μ′ is the difference between numerologies of the UE's active bandwidth part, BWP, and the UE's configured BWP having the largest number of configured physical resource blocks or the largest subcarrier spacing.
21 . The method of claim 12 , wherein the plurality of TBs, comprising the one or more DL data messages, constitute all TBs scheduled for the UE in the serving cell during the plurality of consecutive symbols.
22 . The method of claim 12 , wherein X is given by:
a higher-layer parameter maxMIMO-Layers of the serving cell, when the higher-layer parameter has been configured in the UE by the wireless network; and the maximum number of layers for physical downlink shared channel, PDSCH, supported by the UE for the serving cell, when the higher-layer parameter has not been configured in the UE by the wireless network.
23 . A user equipment (UE) configured to receive downlink (DL) data 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:
determine 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; and
receive and decode 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, is not greater than the LBRM threshold,
wherein the LBRM threshold is based on a maximum number of transmission layers (X) associated with the UE for the serving cell.
24 . A network node configured for downlink (DL) data transmission 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:
determine a limited-buffer rate-matching (LBRM) threshold for the UE based on a maximum number of transmission layers (X) associated with the UE for the serving cell; and
encode and transmit, to the UE, a plurality of transport blocks (TBs) comprising one or more DL data messages such that a total number of coded bits for all TBs scheduled for the UE, in the serving cell during a plurality of consecutive symbols, is not greater than the LBRM threshold,
wherein the total number of coded bits includes coded bits for the plurality of TBs.Join the waitlist — get patent alerts
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