Method and apparatus to enable high rank CSI reporting in wireless communication systems
AssigneeSamsung Electronics Co., Ltd.
InventorsMd. Saifur Rahman, Eko Onggosanusi
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Abstract
A method for operating a user equipment (UE) comprises receiving, from a base station (BS), CSI feedback configuration information; determining, based on the CSI feedback configuration information, CSI feedback including, for each layer l of a total number of v layers, an indicator i1,8,l indicating an index of a strongest coefficient among KNZ,l coefficients, wherein l∈{1, . . . , v} is a layer index, v≥1 is a rank value, and KNZ,l is a number of non-zero coefficients for layer l; determining a payload of the indicator i1,8,l for each layer l based on the rank value; and transmitting, to the BS, over an uplink (UL) channel, the CSI feedback including the indicator i1,8,l each layer l of the total number of v layers.
Claims20
A user equipment (UE) for channel state information (CSI) feedback in a wireless communication system, the UE comprising:
- a transceiver configured to receive, from a base station (BS), CSI feedback configuration information;
- and
- a processor operably connected to the transceiver, the processor configured to:
- determine, based on the CSI feedback configuration information, the CSI feedback including, for each layer l of a total number of v layers, a strongest coefficient indicator (SCI) for indicating an index of a strongest coefficient among KNz,l coefficients, wherein l∈{1, . . . , v} is a layer index, v≥1 is a rank value, SCIl is the SCI for layer l, and KNz,l is a number of non-zero coefficients for layer l;
- and
- determine a payload of the SCIl for each layer of the total number of v layers based on the rank value;
- wherein the transceiver is configured to transmit, to the BS, over an uplink (UL) channel, the CSI feedback including the SCIl for each layer of the total number of v layers, and
- wherein when the rank value v=1, the payload of the SCIl is ┌log2 KNz,l┐ bits, and when the rank value v>1, the payload of the SCIl is ┌loge (2L)┐ bits, where L is a number of first vectors.
A base station (BS), the BS comprising:
- a transceiver configured to:
- transmit channel state information (CSI) feedback configuration information to a user equipment (UE);
- and
- receive, from the UE, CSI feedback including, for each layer l of a total number of v layers, a strongest coefficient indicator (SCI) for indicating an index of a strongest coefficient among KNz,l coefficients, wherein l∈{1, . . . , v} is a layer index, v≥1 is a rank value, SCIl is the SCI for layer l, KNz,l is a number of non-zero coefficients for layer l, and a payload of the SCI for each layer for each layer of the total number of v layers is based on the rank value;
- and
- a processor operably coupled to the transceiver, the processor configured to:
- generate the CSI feedback configuration information;
- and
- obtain the strongest coefficient among the KNz,l coefficients for each layer l of the total number of v layers based on the SCIl for each layer of the total number of v layers,
- wherein when the rank value v=1, the payload of the SCIl is ┌log2 KNZ,11┐ bits, and when the rank value v>1, the payload of the SCIl is ┌log2(2L)┐ bits, where L is a number of first vectors.
A method for operating a user equipment (UE), the method comprising:
- receiving, from a base station (BS), CSI feedback configuration information;
- determining, based on the CSI feedback configuration information, CSI feedback including, for each layer/of a total number of v layers, a strongest coefficient indicator (SCI) for indicating an index of a strongest coefficient among KNZ,l coefficients, wherein l∈{1, . . . , v} is a layer index, v≥1 is a rank value, SCIl is the SCI for layer l, and KNZ,l is a number of non-zero coefficients for layer l;
- determining a payload of the SCIl for each layer of the total number of v layers based on the rank value;
- and
- transmitting, to the BS, over an uplink (UL) channel, the CSI feedback including the SCIl for each layer of the total number of v layers,
- wherein when the rank value v=1, the payload of the SCIl is ┌log2 KNZ,1┐ bits, and when the rank value v>1, the payload of the SCIl is ┌log2(2L)┐ bits, where L is a number of first vectors.
Dependencies are inferred from the claim text.