Apparatus and method for transceiving channel state information
AssigneeSamsung Electronics Co., Ltd.
InventorsYoungwoo Kwak, Hoondong Noh
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Abstract
A method of an evolved Node B (eNB) in a wireless environment is provided. The method includes receiving, from a user equipment (UE), a plurality of channel state information (CSI) feedback respectively corresponding to a plurality of CSI processes that are respectively allocated a plurality of precoding matrix indexes (PMIs), determining a modulation and coding scheme (MCS) value based on the plurality of received CSI feedback, and transmitting, to the UE, data modulated based on the determined MCS value by cyclically using the plurality of PMIs, wherein the plurality of CSI feedback may each include information on a channel quality indication (CQI) as to a PMI allocated to a CSI process corresponding to each of the plurality of CSI feedback.
Claims20
A method performed by a base station, the method comprising:
- transmitting, to a user equipment (UE), configuration information including a codebook subset restriction associated with a second codebook index (i2) for a codebook, wherein each precoding matrix of the codebook is specified by at least one first codebook index (i1) and the second codebook index (i2);
- and
- receiving, the UE, channel state information (CSI) including:
- first precoding matrix indicator (PMI) associated with the at least one first codebook index (i1) without a value associated with the second codebook index (i2), and
- a channel quality indicator (CQI) determined based on a set of precoding matrices,
- wherein the set of precoding matrices corresponds to the first PMI and one or more values associated with the second codebook index (i2), and
- wherein the one or more values associated with the second codebook index (i2) are identified according to the codebook subset restriction associated with the second codebook index (i2).
A method performed by a user equipment (UE), the method comprising:
- receiving, from a base station, configuration information including a codebook subset restriction associated with a second codebook index (i2) for a codebook, wherein each precoding matrix of the codebook is specified by at least one first codebook index (i1) and the second codebook index (i2);
- and
- transmitting, to the base station, channel state information (CSI) including:
- first precoding matrix indicator (PMI) associated with the at least one first codebook index (i1) without a value associated with the second codebook index (i2), and
- a channel quality indicator (CQI) determined based on a set of precoding matrices,
- wherein the set of precoding matrices corresponds to the first PMI and one or more values associated with the second codebook index (i2), and
- wherein the one or more values associated with the second codebook index (i2) are identified according to the codebook subset restriction associated with the second codebook index (i2).
A base station comprising:
- at least one transceiver;
- and
- at least one processor operably coupled to the at least one transceiver, configured to:
- transmit, to a user equipment (UE), configuration information including a codebook subset restriction associated with a second codebook index (i2) for a codebook, wherein each precoding matrix of the codebook is specified by at least one first codebook index (i1) and the second codebook index (i2), and
- receive, from the UE, channel state information (CSI) including:
- first precoding matrix indicator (PMI) associated with the at least one first codebook index (i1) without a value associated with the second codebook index (i2), and
- a channel quality indicator (CQI) determined based on a set of precoding matrices,
- wherein the set of precoding matrices corresponds to the first PMI and one or more values associated with the second codebook index GO, and
- wherein the one or more values associated with the second codebook index (i2) are identified according to the codebook subset restriction associated with the second codebook index (i2).
A user equipment (UE) comprising:
- at least one transceiver;
- and
- at least one processor operably coupled to the at least one transceiver, configured to:
- receive, from a base station, configuration information including a codebook subset restriction associated with a second codebook index (i2) for a codebook, wherein each precoding matrix of the codebook is specified by at least one first codebook index (i1) and the second codebook index (i2), and
- transmit, to the base station, channel state information (CSI) including:
- first precoding matrix indicator (PMI) associated with the at least one first codebook index (i1) without a value associated with the second codebook index (i2), and
- a channel quality indicator (CQI) determined based on a set of precoding matrices,
- wherein the set of precoding matrices corresponds to the first PMI and one or more values associated with the second codebook index (i2), and
- wherein the one or more values associated with the second codebook index (i2) are identified according to the codebook subset restriction associated with the second codebook index (i2).
Dependencies are inferred from the claim text.