Dynamic prg size precoding

Patent metadata

Field	Value
Publication number	US-2025274219-A1
Application number	US-202418584956-A
Country	US
Kind code	A1
Filing date	Feb 22, 2024
Priority date	Feb 22, 2024
Publication date	Aug 28, 2025
Grant date	—

Abstract

A method for wireless communication at UE and related apparatus are provided. In the method, the UE groups a set of RBs of a slot into multiple PRGs having multiple PRG sizes; and communicates with a network entity based on multiple precoding matrices respectively associated with the multiple PRGs having the multiple PRG sizes. The UE performs a precoding procedure based on the multiple PRG sizes to obtain the multiple precoding matrices, and each precoding matrix of the multiple precoding matrices is based on a concatenated channel matrix based on a corresponding PRG size of the multiple PRG sizes.

First claim

What is claimed is:

1 . An apparatus for wireless communication at a user equipment (UE), comprising:
at least one memory; and at least one processor coupled to the at least one memory and, based at least in part on information stored in the at least one memory, the at least one processor, individually or in any combination, is configured to cause the UE to:
group a set of resource blocks (RBs) of a slot into multiple physical resource block groups (PRGs) having multiple PRG sizes; and
communicate with a network entity based on multiple precoding matrices respectively associated with the multiple PRGs having the multiple PRG sizes.

2 . The apparatus of claim 1 , further comprising a transceiver coupled to the at least one processor, wherein to communicate with the network entity, the at least one processor, individually or in any combination, is configured to cause the UE to communicate with the network entity via the transceiver, and wherein the at least one processor, individually or in any combination, is further configured to cause the UE to:
receive, from the network entity via downlink channel information (DCI), a network indication of the multiple PRG sizes for the slot.

3 . The apparatus of claim 1 , wherein the at least one processor, individually or in any combination, is further configured to cause the UE to:
determine, based on characteristics associated with the set of RBs, the multiple PRG sizes for the slot.

4 . The apparatus of claim 3 , wherein the at least one processor, individually or in any combination, is further configured to cause the UE to:
transmit, for the network entity, a size indication of the multiple PRG sizes for the slot.

5 . The apparatus of claim 3 , wherein to determine the multiple PRG sizes, the at least one processor, individually or in any combination, is configured to cause the UE to:
group, based on the characteristics associated with the set of RBs, the set of RBs into multiple RB groups each comprising one or more RB units adjacent to each other, each RB unit comprising one or more RBs of the set of RBs, wherein a difference between a first average value of the characteristics of all RB units in a first RB group of the multiple RB groups and a second average value of the characteristics of all RB units in a second RB group of the multiple RB groups is greater than a threshold; and set, based on sizes of the multiple RB groups, the multiple PRG sizes.

6 . The apparatus of claim 5 , wherein the characteristics of an RB unit include an average power of all RBs in the RB unit.

7 . The apparatus of claim 5 , wherein each RB unit includes four RBs.

8 . The apparatus of claim 4 , wherein to transmit the size indication of the multiple PRG sizes, the at least one processor, individually or in any combination, is configured to cause the UE to:
convert the multiple PRG sizes into a stream of binary bits, wherein each PRG size of the multiple PRG sizes occupies a first number of binary bits in the stream of binary bits; encode the stream of binary bits using an encoding code to obtain an encoded stream; and transmit, via an uplink control information (UCI) message, the encoded stream indicating the multiple PRG sizes.

9 . The apparatus of claim 8 , wherein the at least one processor, individually or in any combination, is further configured to cause the UE to:
receive, from the network entity, one or more parameters for the multiple PRG sizes, wherein the one or more parameters comprise one or more of:
a minimum resolution for RB units in the set of RBs,
the first number of binary bits in the stream of binary bits for transmitting each PRG size of the multiple PRG sizes,
a length of cyclic redundancy check (CRC) corresponding to the multiple PRG sizes, or
a code indication of the encoding code used for encoding the stream of binary bits.

10 . The apparatus of claim 3 , wherein the at least one processor, individually or in any combination, is further configured to cause the UE to:
calculate a first cyclic redundancy check (CRC) based on an initial set of multiple PRG sizes determined for the slot; and receive, from the network entity via downlink control information (DCI), a second CRC based on a set of network determined PRG sizes, and wherein to determine the multiple PRG sizes, the at least one processor, individually or in any combination, is further configured to cause the UE to: compare the first CRC to the second CRC.

11 . The apparatus of claim 10 , wherein the at least one processor, individually or in any combination, is further configured to cause the UE to:
apply, in response to a mismatch between the first CRC and the second CRC, a correction to the multiple PRG sizes, or estimate, in response to the mismatch between the first CRC and the second CRC, the multiple PRG sizes based on a reference signal.

12 . The apparatus of claim 1 , wherein the at least one processor, individually or in any combination, is further configured to cause the UE to:
perform, based on the multiple PRG sizes, a precoding procedure to obtain the multiple precoding matrices for an uplink transmission with the network entity, wherein each precoding matrix of the multiple precoding matrices is based on a concatenated channel matrix based on a corresponding PRG size of the multiple PRG sizes.

13 . The apparatus of claim 12 , wherein to perform the precoding procedure, the at least one processor, individually or in any combination, is configured to cause the UE to:
perform, for each precoding matrix of the multiple precoding matrices, a singular value decomposition on the concatenated channel matrix, wherein the precoding matrix for the uplink transmission with the network entity is based on a right eigenmatrix of the singular value decomposition of the concatenated channel matrix.

14 . The apparatus of claim 1 , wherein the at least one processor, individually or in any combination, is configured to cause the UE to:
transmit, for the network entity, a capability indication for a capability to support the multiple PRG sizes.

15 . The apparatus of claim 14 , wherein the capability indication comprises one of:
a first support for receiving the multiple PRG sizes from the network entity, a second support for calculating the multiple PRG sizes at the UE in parallel with the network entity, or a third support for providing a size indication of the multiple PRG sizes from the UE to the network entity.

16 . The apparatus of claim 1 , wherein to communicate with the network entity, the at least one processor, individually or in any combination, is configured to cause the UE to:
transmit or receive communication that is precoded based on the multiple PRGs that have different PRG sizes over a frequency domain of the communication.

17 . An apparatus for wireless communication at a network entity, comprising:
at least one memory; and at least one processor coupled to the at least one memory and, based at least in part on information stored in the at least one memory, the at least one processor, individually or in any combination, is configured to cause the network entity to:
group a set of resource blocks (RBs) of a slot into multiple physical resource block groups (PRGs) having multiple PRG sizes; and
communicate with a user equipment (UE) based on multiple precoding matrices respectively associated with the multiple PRGs.

18 . The apparatus of claim 17 , further comprising a transceiver coupled to the at least one processor, wherein to communicate with the UE

Assignees

• Qualcomm Inc

Inventors

• Pick Jacob
• Landis Shay
• Berger Peer
• Bar-Or Tillinger Amit
• Geva Tomer

Classifications

• H04L1/0038

  Blind format detection (for detection of modulation format H04L27/0012) · CPC title

• H04L1/0025

  Transmission of mode-switching indication · CPC title

• H04L1/0009

  by adapting the channel coding (H04L1/1812 takes precedence) · CPC title

• H04L1/0007

  by modifying the frame length · CPC title

• H04L27/2602

  Signal structure · CPC title