UE feedback for layer reduction
AssigneeQUALCOMM Incorporated
InventorsAmit Bar-Or Tillinger, Gideon Shlomo Kutz, Tal Oved
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Abstract
A method for wireless communication at a user equipment (UE) and related apparatus are provided. In the method, the UE obtains the channel information including at least one of a set of mutual information for each layer of a first number of layers associated with a channel between the UE and a network entity, or rank reduction information for a rank reduction of the channel. The UE further transmit the channel information to the network entity for the identification of a precoding scheme for communication between the UE and the network entity; and communicates with the network entity, based on the channel information and the precoding scheme.
Claims28
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 is configured to:
- obtain channel information, wherein the channel information includes a set of mutual information for each layer of a first number of layers associated with a channel between the UE and a network entity, wherein the set of mutual information for each layer of the first number of layers is based on at least one of a time-domain granularity or a frequency-domain granularity, and wherein each mutual information of the set of mutual information is based on a set of log-likelihood ratio (LLR) values associated with each layer of the first number of layers, and the set of mutual information for each layer of the first number of layers is based on an average of the mutual information corresponding to the LLR values related to a desired set of frequencies or a desired set of orthogonal frequency division multiplexing (OFDM) symbols;
- transmit, to the network entity, the channel information for an identification of a precoding scheme for communication between the UE and the network entity;
- and
- communicate, based on the channel information and the precoding scheme, with the network entity.
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 is configured to:
- obtain channel information, wherein the channel information includes rank reduction information for a rank reduction of a channel between the UE and a network entity, and wherein the rank reduction information includes a rank reduction matrix indicating a reduction in ranks from a first number to a second number;
- transmit, to the network entity, the channel information for an identification of a precoding scheme for communication between the UE and the network entity;
- and
- communicate, based on the channel information and the precoding scheme, with the network entity.
An apparatus of 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 is configured to:
- receive, from a user equipment (UE), channel information, wherein the channel information includes
- a set of mutual information for each layer of a first number of layers associated with a channel between the UE and the network entity, wherein the set of mutual information for each layer of the first number of layers is based on at least one of a time-domain granularity or a frequency-domain granularity, and wherein each mutual information of the set of mutual information is based on a set of log-likelihood ratio (LLR) values associated with each layer of the first number of layers;
- identify, based on the channel information, a precoding scheme for communication between the UE and the network entity, wherein to identify the precoding scheme, the at least one processor is configured to:
- identify one or more sets of combined precoders based on original precoders for each layer of the first number of layers over a set of frequency ranges;
- and
- communicate, based on the channel information and the precoding scheme, with the UE.
An apparatus of 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 is configured to:
- receive, from a user equipment (UE), channel information, wherein the channel information includes rank reduction information for a rank reduction of a channel between the UE and the network entity, and wherein the rank reduction information includes a rank reduction matrix indicating a reduction in ranks from a first number to a second number;
- identify, based on the channel information, a precoding scheme for communication between the UE and the network entity;
- and
- communicate, based on the channel information and the precoding scheme, with the UE.
Dependencies are inferred from the claim text.