Abstract
A codebook based channel information feedback method, device and system are provided in the present invention. The codebook based channel information feedback method includes: measuring, by a terminal in a communication system, a parameter of a downlink channel between the terminal and a base station of the communication system; selecting a plurality of precoding matrixes from a precoding codebook by using the parameter of the downlink channel, wherein a plurality of the precoding matrixes can be used by both of single-user multi-input multi-output (MIMO) transport mode and multi-user MIMO transport mode, and the precoding codebook is an aggregation of precoding matrixes; and feeding back a first information for indicating a plurality of the precoding matrixes to the base station.
Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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Declaration Date | Declaration Reference | Declaring Company | Specification Number | ||||||
4G | 22/04/2014 | ISLD-201404-004 | SONY CORP | No | Family Member | ||||
4G | 29/07/2021 | ISLD-202106-034 | SONY CORP | No | Family Member | ||||
5G | 29/07/2021 | ISLD-202106-034 | SONY CORP | No | Family Member |
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EP2536058A1 | 4G | 22/04/2014 | ISLD-201404-004 | SONY CORP | Yes | Basis Patent | ||||
EP2536058A1 | 4G | 29/07/2021 | ISLD-202106-034 | SONY CORP | Yes | Basis Patent | ||||
EP2536058A1 | 5G | 29/07/2021 | ISLD-202106-034 | SONY CORP | Yes | Basis Patent | ||||
EP2536058A4 | 4G | 22/04/2014 | ISLD-201404-004 | SONY CORP | Yes | Basis Patent | ||||
EP2536058A4 | 4G | 29/07/2021 | ISLD-202106-034 | SONY CORP | Yes | Basis Patent | ||||
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Technologies
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Claim
1. An electronic device for user equipment in a wireless communication system, the electronic device comprising:
circuitry configured to
measure a downlink channel based on a control signal from a base station;
determine a number of data flows that can be simultaneously received by the user equipment;
generate an estimated downlink channel matrix of the downlink channel based on a pilot signal from the base station;
select a plurality of pre-coding matrices from a pre-coding codebook based on differences between the estimated downlink channel matrix and the plurality of pre-coding matrices;
determine, for feeding back channel state information to the base station, a plurality of pre-coding matrix indicators based on a measurement result of the downlink channel and the number of data flows, each pre-coding matrix indicator of the plurality of pre-coding matrix indicators indicating a corresponding pre-coding matrix of the plurality of pre-coding matrices; and
transmit the plurality of pre-coding matrix indicators to the base station, wherein
the base station adjusts each pre-coding matrix of the plurality of pre-coding matrices according to a corresponding weight value to generate a plurality of adjusted pre-coding matrices, and
the base station generates a first pre-coding matrix according to the plurality of adjusted pre-coding matrices.
2. The electronic device according to claim 1, wherein the plurality of pre-coding matrices are adapted to a transmission mode.
3. The electronic device according to claim 1, wherein
the user equipment is served by the base station via a coordinated multi-point (CoMP) transmission scheme, and
the circuitry is further configured to select the plurality of pre-coding matrices for feeding back channel state information to facilitate the CoMP transmission scheme.
4. The electronic device according to claim 1, wherein the plurality of pre-coding matrices are applicable for single-user multiple input multiple output (SU-MIMO) transmission and multi-user multiple input multiple output (MU-MIMO) transmission to facilitate dynamic switching between the SU-MIMO transmission and the MU-MIMO transmission.
5. The electronic device according to claim 1, wherein
the plurality of pre-coding matrix indicators comprises a first pre-coding matrix indicator and a second pre-coding matrix indicator, and
the circuitry is configured to apply the first pre-coding matrix indicator and the second pre-coding matrix indicator to an uplink channel of the user equipment to feed back the channel state information.
6. The electronic device according to claim 1, wherein the electronic device further comprises:
the user equipment; and
a plurality of antennas configured to transmit the plurality of pre-coding matrix indicators indicating the plurality of pre-coding matrices satisfying a selection criterion to the base station.
7. The electronic device according to claim 1, wherein the circuitry is further configured to select the plurality of pre-coding matrices based on a selection criterion according to the number of data flows.
8. The electronic device according to claim 7, wherein the circuitry is further configured to
set a first selection criterion in response to the determined number of data flows being equal to one data flow; and
set a second selection criterion in response to the determined number of data flows being greater than one data flow.
9. A method for user equipment in a wireless communication system, the method comprising:
measuring a downlink channel based on a control signal from a base station;
determining a number of data flows that can be simultaneously received by the user equipment;
generating an estimated downlink channel matrix of the downlink channel based on a pilot signal from the base station;
selecting, by circuitry, a plurality of pre-coding matrices from a pre-coding codebook based on differences between the estimated downlink channel matrix and the plurality of pre-coding matrices;
determining, by the circuitry for feeding back channel state information to the base station, a plurality of pre-coding matrix indicators based on a measurement result of the downlink channel and the number of data flows, each pre-coding matrix indicator of the plurality of pre-coding matrix indicators indicating a corresponding pre-coding matrix of the plurality of pre-coding matrices; and
transmitting the plurality of pre-coding matrix indicators to the base station, wherein
the base station adjusts each pre-coding matrix of the plurality of pre-coding matrices according to a corresponding weight value to generate a plurality of adjusted pre-coding matrices, and
the base station generates a first pre-coding matrix according to the plurality of adjusted pre-coding matrices.
10. The method according to claim 9, further comprising:
selecting the plurality of pre-coding matrices based on a selection criterion according to the number of data flows.
11. The method according to claim 10, further comprising:
setting a first selection criterion in response to the determined number of data flows being equal to one data flow; and
setting a second selection criterion in response to the determined number of data flows being greater than one data flow.
12. A non-transitory computer readable medium having instructions stored therein that, when executed by processing circuitry, causes the processing circuitry to perform a method for a wireless communication system, the method comprising:
measuring a downlink channel based on a control signal from a base station;
determining a number of data flows that can be simultaneously received by the user equipment;
generating an estimated downlink channel matrix of the downlink channel based on a pilot signal from the base station;
selecting a plurality of pre-coding matrices from a pre-coding codebook based on differences between the estimated downlink channel matrix and the plurality of pre-coding matrices;
determining, for feeding back channel state information to the base station, a plurality of pre-coding matrix indicators based on a measurement result of the downlink channel and the number of data flows, each pre-coding matrix indicator of the plurality of pre-coding matrix indicators indicating a corresponding pre-coding matrix of the plurality of pre-coding matrices; and
transmitting the plurality of pre-coding matrix indicators to the base station, wherein
the base station adjusts each pre-coding matrix of the plurality of pre-coding matrices according to a corresponding weight value to generate a plurality of adjusted pre-coding matrices, and
the base station generates a first pre-coding matrix according to the plurality of adjusted pre-coding matrices.
13. An electronic device for a base station in a wireless communication system, the electronic device comprising:
circuitry configured to
acquire a plurality of pre-coding matrix indicators from user equipment;
determine a plurality of pre-coding matrices from a pre-coding codebook, each pre-coding matrix of the plurality of pre-coding matrices indicated by a corresponding pre-coding matrix indicator of the plurality of pre-coding matrix indicators;
adjust each pre-coding matrix of the plurality of pre-coding matrices according to a corresponding weight value to generate a plurality of adjusted pre-coding matrices; and
generate a first pre-coding matrix for the user equipment based on the plurality of adjusted pre-coding matrices, wherein
the plurality of pre-coding matrix indicators are determined by the user equipment based on a measurement result of a downlink channel between the base station and the user equipment and a number of data flows that can be simultaneously received by the user equipment, and
the plurality of pre-coding matrices are selected by the user equipment via generating an estimated downlink channel matrix of the downlink channel based on a pilot signal from the base station, and selecting the plurality of pre-coding matrices based on differences between the estimated downlink channel matrix and the plurality of pre-coding matrices.
14. The electronic device according to claim 13, wherein the plurality of pre-coding matrices are adapted to a transmission mode.
15. The electronic device according to claim 13, wherein
the base station serves the user equipment via a coordinated multi-point (CoMP) transmission scheme, and
the circuitry is further configured to generate the first pre-coding matrix to facilitate the CoMP transmission scheme.
16. The electronic device according to claim 13, wherein the plurality of pre-coding matrices are applicable for single-user multiple input multiple output (SU-MIMO) transmission and multi-user multiple input multiple output (MU-MIMO) transmission to facilitate dynamic switching between the SU-MIMO transmission and the MU-MIMO transmission.
17. The electronic device according to claim 13, wherein
the plurality of pre-coding matrix indicators comprises a first pre-coding matrix indicator and a second pre-coding matrix indicator, and
the circuitry is configured to obtain the first pre-coding matrix indicator and the second pre-coding matrix indicator from an uplink channel of the user equipment.
18. The electronic device according to claim 13, wherein the electronic device further comprises:
the base station; and
a plurality of antennas configured to receive the plurality of pre-coding matrix indicators indicating the pre-coding matrices satisfying a selection criterion to the base station.
19. A method for a base station in a wireless communication system, the method comprising:
acquiring a plurality of pre-coding matrix indicators from user equipment;
determining, by circuitry, a plurality of pre-coding matrices from a pre-coding codebook, each pre-coding matrix of the plurality of pre-coding matrices indicated by a corresponding pre-coding matrix indicator of the plurality of pre-coding matrix indicators;
adjusting, by the circuitry, each pre-coding matrix of the plurality of pre-coding matrices according to a corresponding weight value to generate a plurality of adjusted pre-coding matrices; and
generating, by the circuitry, a first pre-coding matrix for the user equipment based on the plurality of adjusted pre-coding matrices, wherein
the plurality of pre-coding matrix indicators are determined based on a measurement result of a downlink channel between the base station and the user equipment and a number of data flows that can be simultaneously received by the user equipment, and
the plurality of pre-coding matrices are selected by the user equipment via generating an estimated downlink channel matrix of the downlink channel based on a pilot signal from the base station, and selecting the plurality of pre-coding matrices based on differences between the estimated downlink channel matrix and the plurality of pre-coding matrices.
20. A non-transitory computer readable medium having instructions stored therein that, when executed by processing circuitry, causes the processing circuitry to perform a method for a wireless communication system, the method comprising:
acquiring a plurality of pre-coding matrix indicators from user equipment;
determining a plurality of pre-coding matrices from a pre-coding codebook, each pre-coding matrix of the plurality of pre-coding matrices indicated by a corresponding pre-coding matrix indicator of the plurality of pre-coding matrix indicators;
adjusting, by the circuitry, each pre-coding matrix of the plurality of pre-coding matrices according to a corresponding weight value to generate a plurality of adjusted pre-coding matrices; and
generating a first pre-coding matrix for the user equipment based on the plurality of adjusted pre-coding matrices, wherein
the plurality of pre-coding matrix indicators are determined based on a measurement result of a downlink channel between the base station and the user equipment and a number of data flows that can be simultaneously received by the user equipment, and
the plurality of pre-coding matrices are selected by the user equipment via generating an estimated downlink channel matrix of the downlink channel based on a pilot signal from the base station, and selecting the plurality of pre-coding matrices based on differences between the estimated downlink channel matrix and the plurality of pre-coding matrices.
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Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
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