US 10,855,356 B2Granted

Preparing CSI using a set of zero amplitude parameters

AssigneeMotorola Mobility LLC

InventorsUdar Mittal, Tyler Brown, Khalid Zeineddine, Jiho Song

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Abstract

Apparatuses, methods, and systems are disclosed for preparing channel state information (“CSI”). One apparatus includes a processor and a transceiver configured to communicate with a base unit over a RAN using spatial multiplexing, wherein multiple transmission layers are transmitted at a time, each transmission layer comprising multiple beams. The processor identifies a set of non-zero amplitude parameters and a set of zero amplitude parameters over the set of layers. The processor computes a number of non-zero amplitude parameters and determines an indication of the number of non-zero amplitude parameters. The processor determines the location of zero amplitude parameters to generate a set of location bits. The processor prepares CSI that includes the indication of the number of non-zero amplitude parameters and the set of location bits. The transceiver transmits the CSI to the base unit.

Claims20

Dependent claims

An apparatus comprising:

a transceiver that communicates with a base unit over a radio access network using spatial multiplexing, wherein multiple transmission layers are transmitted at a time, each transmission layer comprising multiple beams;
and
a processor that:
identifies a set of non-zero amplitude parameters over a set of layers;
identifies a set of zero amplitude parameters over the set of layers;
computes a total number of non-zero amplitude parameters based on at least one of the set of non-zero amplitude parameters and the set of zero amplitude parameters;
determines an indication of the total number of non-zero amplitude parameters, wherein the processor determines the indication of the total number of non-zero amplitude parameters by encoding the total number of non-zero amplitude parameters by selecting a codeword from a plurality of candidate codewords, wherein the length of at least one candidate codeword is not more than the number of bits needed to code the total number of non-zero amplitude parameters in binary;
determines a location of zero amplitude parameters to generate a set of location bits;
and
prepares channel state information (“CSI”) wherein the CSI comprises the indication of the total number of non-zero amplitude parameters and the set of location bits,
wherein the transceiver transmits the CSI to the base unit.

8 more elements

A method comprising:

communicating with a base unit over a radio access network using spatial multiplexing, wherein multiple transmission layers are transmitted at a time, each transmission layer comprising multiple beams;
identifying a set of non-zero amplitude parameters over a set of layers;
identifying a set of zero amplitude parameters over the set of layers;
computing a total number of non-zero amplitude parameters based on at least one of the set of non-zero amplitude parameters and the set of zero amplitude parameters;
determining an indication of the total number of non-zero amplitude parameters, wherein determining the indication of the total number of non-zero amplitude parameters comprises encoding the total number of non-zero amplitude parameters by selecting a codeword from a plurality of candidate codewords, wherein the length of at least one candidate codeword is not more than the number of bits needed to code the total number of non-zero amplitude parameters in binary;
determining a location of zero amplitude parameters to generate a set of location bits;
preparing channel state information (“CSI”), wherein the CSI comprises the indication of the total number of non-zero amplitude parameters and the set of location bits;
and
transmitting the CSI to the base unit.

6 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/422,191Filed 24 May 2019 · continuation
Priority: 15 Dec 2017
Published: US 2019/0190578 A112 Sep 2019
Granted: 1 Dec 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

H04B 7/0626
Feedback content: channel coefficients, e.g. channel state information [CSI]
H04B 7/0452
MIMO systems: multi-user MIMO systems
H04B 7/0469
Taking physical layer constraints into account: taking special antenna structures, e.g. cross polarized antennas into account
H04B 7/0478
Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting: special codebook structures directed to feedback optimisation

Family

Application15/844,147Parent of this continuation · filed 15 Dec 2017
US 2019/0280752 A1Pre-grant publication · published 12 Sep 2019
US 10,305,568 B1Parent of this continuation
US 2019/0190578 A1Published application
US 10,855,356 B2This patent

From the US filing history. Foreign family members aren’t listed.