Abstract
A method and system are provided for scheduling data transmission in a Multiple-Input Multiple-Output (MIMO) system. The MIMO system may comprise at least one MIMO transmitter and at least one MIMO receiver. Feedback from one or more receivers may be used by a transmitter to improve quality capacity and scheduling in MIMO communication systems. The method may include generating or receiving information pertaining to a MIMO channel metric and information pertaining to a Channel Quality Indicator (CQI) in respect of a transmitted signal; and sending a next transmission to a receiver using a MIMO mode selected in accordance with the information pertaining to the MIMO channel metric and an adaptive coding and modulation selected in accordance with the information pertaining to the CQI.
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Specification Information
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| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Resource configuration Multiple-Input Multiple-Output(MIMO)/Massive MIMO
Product
Base Station (eNB/gNB)User Equipment (UE/Terminal)
Use Cases
Wireless communication
Services
Channel Quality Measurement/Estimation
Claim
1. A method of operating a multiple-input-multiple-output (MIMO) transmitter, the method comprising:
transmitting a first signal to at least one receiver;
receiving from the at least one receiver a composite metric based on information pertaining to a MIMO channel metric and information pertaining to a channel quality indicator (CQI) corresponding to the transmitted signal, the composite metric specifying a modulation and coding scheme and a MIMO mode; and
transmitting a second signal to the at least one receiver using a MIMO mode selected in accordance with the composite metric and a modulation and coding scheme selected in accordance with the composite metric.', 'transmitting a first signal to at least one receiver;', 'receiving from the at least one receiver a composite metric based on information pertaining to a MIMO channel metric and information pertaining to a channel quality indicator (CQI) corresponding to the transmitted signal, the composite metric specifying a modulation and coding scheme and a MIMO mode; and', 'transmitting a second signal to the at least one receiver using a MIMO mode selected in accordance with the composite metric and a modulation and coding scheme selected in accordance with the composite metric.
2. The method of claim 1, wherein the composite metric serves as a basis for selecting between at least two MIMO modes selected from a group consisting of BLAST, STTD, beamforming, spatial multiplexing, and a space-time mapping scheme.
3. The method of claim 1, wherein the MIMO transmitter is a MIMO orthogonal frequency division multiplexing (MIMO-OFDM) transmitter.
4. The method of claim 1, further comprising receiving, from the at least one receiver, MIMO capability information indicating MIMO capability of the corresponding receiver.
5. The method of claim 1, further comprising selecting and scheduling at least one transmit antenna at the MIMO transmitter for data transmission to the at least one receiver.
6. The method of claim 5, wherein selecting and scheduling at least one transmit antenna at the MIMO transmitter for data transmission to the at least one receiver is based on the composite metric.
7. A method of operating a multiple-input-multiple-output (MIMO) receiver, the method comprising:
receiving a signal at the receiver from at least one transmitter;
generating a MIMO channel metric and a channel quality indicator (CQI) based on the received signal;
determining a composite metric based on the MIMO channel metric and CQI, the composite metric specifying a modulation and coding scheme and a MIMO mode; and
transmitting the composite metric to the at least one transmitter.', 'receiving a signal at the receiver from at least one transmitter;', 'generating a MIMO channel metric and a channel quality indicator (CQI) based on the received signal;', 'determining a composite metric based on the MIMO channel metric and CQI, the composite metric specifying a modulation and coding scheme and a MIMO mode; and', 'transmitting the composite metric to the at least one transmitter.
8. The method of claim 7, wherein the composite metric serves as a basis for selecting between at least two MIMO modes selected from a group consisting of BLAST, STTD, beamforming, spatial multiplexing, and a space-time mapping scheme.
9. The method of claim 7, wherein determining a composite metric comprises determining a composite metric which specifies for the MIMO mode:
a space time block code when the CQI indicates a low channel quality regardless of the MIMO channel metric;
spatial multiplexing when the CQI indicates a high channel quality and the MIMO channel metric is high; and
one of a space time code block and a spatial multiplex mode when the CQI indicates a high channel quality and the MIMO channel metric is low.', 'a space time block code when the CQI indicates a low channel quality regardless of the MIMO channel metric;', 'spatial multiplexing when the CQI indicates a high channel quality and the MIMO channel metric is high; and', 'one of a space time code block and a spatial multiplex mode when the CQI indicates a high channel quality and the MIMO channel metric is low
10. The method of claim 7, further comprising transmitting to the at least one transmitter MIMO capability information indicating MIMO capability of the receiver
11. A multiple-input-multiple-output (MIMO) transmitter system, comprising:
a transmitter operating to transmit a first signal to at least one receiver;
a receiver operating to receive, from the at least one receiver, a composite metric based on information corresponding to a MIMO channel metric and information corresponding to a channel quality indicator (CQI) relating to the transmitted signal, the composite metric specifying a modulation and coding scheme and a MIMO mode;
the transmitter further operating to transmit a second signal to the at least one receiver using a MIMO mode selected in accordance with the composite metric and a modulation and coding scheme selected in accordance with the composite metric.', 'a transmitter operating to transmit a first signal to at least one receiver;', 'a receiver operating to receive, from the at least one receiver, a composite metric based on information corresponding to a MIMO channel metric and information corresponding to a channel quality indicator (CQI) relating to the transmitted signal, the composite metric specifying a modulation and coding scheme and a MIMO mode;', 'the transmitter further operating to transmit a second signal to the at least one receiver using a MIMO mode selected in accordance with the composite metric and a modulation and coding scheme selected in accordance with the composite metric
12. The transmitter system of claim 11, wherein the composite metric serves as a basis for selecting between at least two MIMO modes selected from a group consisting of BLAST, STTD, beamforming, spatial multiplexing, and a space-time mapping scheme
13. The transmitter system of claim 11, wherein the MIMO transmitter is a MIMO orthogonal frequency division multiplexing (MIMO-OFDM) transmitter
14. The transmitter system of claim 11, wherein the receiver operates to receive from the at least one receiver MIMO capability information indicating MIMO capability of the receiver
15. The transmitter system of claim 11, wherein the transmitter further operates to select and schedule at least one transmit antenna at the MIMO transmitter for data transmission to the at least one receiver
16. The transmitter system of claim 15, wherein the transmitter operates to select and schedule at least one transmit antenna at the MIMO transmitter for data transmission to the at least one receiver based on the composite metric
17. A multiple-input-multiple-output (MIMO) receiver system, comprising:
a receiver operating to receive a signal from at least one transmitter;
a generator operating to:
generate a MIMO channel metric and a channel quality indicator (CQI) based on the received signal; and
determine a composite metric based on the MIMO channel metric and CQI, the composite metric specifying a modulation and coding scheme and a MIMO mode; and
a transmitter operating to transmit the composite metric to the at least one transmitter.', 'a receiver operating to receive a signal from at least one transmitter;', 'a generator operating to:
generate a MIMO channel metric and a channel quality indicator (CQI) based on the received signal; and
determine a composite metric based on the MIMO channel metric and CQI, the composite metric specifying a modulation and coding scheme and a MIMO mode; and', 'generate a MIMO channel metric and a channel quality indicator (CQI) based on the received signal; and', 'determine a composite metric based on the MIMO channel metric and CQI, the composite metric specifying a modulation and coding scheme and a MIMO mode; and', 'a transmitter operating to transmit the composite metric to the at least one transmitter
18. The receiver system of claim 17, wherein the composite metric serves as a basis for selecting between at least two MIMO modes selected from a group consisting of BLAST, STTD, beamforming, spatial multiplexing, and a space-time mapping scheme.19. The receiver system of claim 17, wherein the generator operates to determine a composite metric by determining a composite metric which specifies for the MIMO mode:
a space time block code when the CQI indicates a low channel quality regardless of the MIMO channel metric;
spatial multiplexing when the CQI indicates a high channel quality and the MIMO channel metric is high; and
one of a space time code block and a spatial multiplex mode when the CQI indicates a high channel quality and the MIMO channel metric is low.', 'a space time block code when the CQI indicates a low channel quality regardless of the MIMO channel metric;', 'spatial multiplexing when the CQI indicates a high channel quality and the MIMO channel metric is high; and', 'one of a space time code block and a spatial multiplex mode when the CQI indicates a high channel quality and the MIMO channel metric is low.
20. The receiver system of claim 17, wherein the transmitter further operates to transmit to the at least one transmitter MIMO capability information indicating MIMO capability of the receiver.']
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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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