CHANNEL STATE INFORMATION FEEDBACK AND ACQUISITIONMETHOD AND DEVICE
First Claim
1. A method for feeding back channel state information, the method comprising:
- obtaining, by a terminal, one first-dimension downlink reference signal resource, S second-dimension downlink reference signal resources, and a first correspondence relationship, configured by a network device, wherein the first correspondence relationship comprises a correspondence relationship between the S second-dimension downlink reference signal resources and N first-dimension beam-forming weights, and both S and N are integers greater than 1;
measuring, by the terminal, a first-dimension downlink reference signal according to the first-dimension downlink reference signal resource to obtain a first-dimension Pre-coding matrix Indicator (PMI), wherein the first-dimension PMI indicates one of the N first-dimension beam-forming weights;
selecting, by the terminal, one of the S second-dimension downlink reference signal resources for measuring a second-dimension downlink reference signal, according to the obtained first-dimension PMI and the first correspondence relationship; and
measuring, by the terminal, the second-dimension downlink reference signal, and feeding back channel state information, according to the selected resource for measuring the second-dimension downlink reference signal, wherein the second-dimension downlink reference signal transmitted over the selected second-dimension downlink reference signal resource is transmitted after being beam-formed using the first-dimension beam-forming weight corresponding to the resource.
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Accused Products
Abstract
Disclosed are a channel state information feedback and acquisition method and device. The application comprises: acquiring, by a terminal, a first-dimension downlink reference signal resource, S second-dimension downlink reference signal resources and a first corresponding relationship of the above configured by a network device; measuring, by the terminal and according to the first-dimension downlink reference signal resource, a first-dimension downlink reference signal, and selecting, by the terminal and according to the measured first-dimension PMI and the first corresponding relationship, a resource for measuring a second-dimension downlink reference signal, measuring, according to the resource, the second-dimension downlink reference signal, and feeding back channel state information, wherein the second-dimension reference signal is transmitted after forming a first-dimension beamforming weight. The present application enables acquisition of channel state information between a network device and a terminal, and adjustment of the first-dimension beamforming weight for forming the second-dimension reference signal according to the PMI fed back by the first-dimension.
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Citations
26 Claims
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1. A method for feeding back channel state information, the method comprising:
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obtaining, by a terminal, one first-dimension downlink reference signal resource, S second-dimension downlink reference signal resources, and a first correspondence relationship, configured by a network device, wherein the first correspondence relationship comprises a correspondence relationship between the S second-dimension downlink reference signal resources and N first-dimension beam-forming weights, and both S and N are integers greater than 1; measuring, by the terminal, a first-dimension downlink reference signal according to the first-dimension downlink reference signal resource to obtain a first-dimension Pre-coding matrix Indicator (PMI), wherein the first-dimension PMI indicates one of the N first-dimension beam-forming weights; selecting, by the terminal, one of the S second-dimension downlink reference signal resources for measuring a second-dimension downlink reference signal, according to the obtained first-dimension PMI and the first correspondence relationship; and measuring, by the terminal, the second-dimension downlink reference signal, and feeding back channel state information, according to the selected resource for measuring the second-dimension downlink reference signal, wherein the second-dimension downlink reference signal transmitted over the selected second-dimension downlink reference signal resource is transmitted after being beam-formed using the first-dimension beam-forming weight corresponding to the resource. - View Dependent Claims (2, 4, 5, 7, 8, 9, 10, 14)
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3. (canceled)
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6. (canceled)
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11. A method for obtaining channel state information, the method comprising:
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configuring, by a network device, a terminal with one first-dimension downlink reference signal resource, S second-dimension downlink reference signal resources, and a first correspondence relationship comprising a correspondence relationship between the S second-dimension downlink reference signal resources and N first-dimension beam-forming weights, wherein both S and N are integers greater than 1; transmitting, by the network device, a first-dimension downlink reference signal according to the first-dimension downlink reference signal resource, and transmitting second-dimension downlink reference signals according to the second-dimension downlink reference signal resources, wherein the second-dimension downlink reference signal transmitted over each second-dimension downlink reference signal resource is transmitted after being beam-formed using the first-dimension beam-forming weight corresponding to the resource; and receiving, by the network device, channel state information measured and fed back by the terminal using the second-dimension downlink reference signal, and obtaining a channel state of the terminal from the channel state information, wherein the channel state information is obtained by the terminal by selecting one of the S second-dimension downlink reference signal resources for measuring the second-dimension downlink reference signal, according to a first-dimension Pre-coding matrix Indicator (PMI) obtained by measuring the first-dimension downlink reference signal, and the first correspondence relationship, and then measuring the second-dimension downlink reference signal according to the selected second-dimension downlink reference signal resource, and the first-dimension PMI indicates one of the N first-dimension beam-forming weights. - View Dependent Claims (12, 13)
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15-17. -17. (canceled)
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18. A terminal, comprising at least one processor and a memory, wherein the memory is configured to store computer readable program codes, the at least one processor is configured to execute the computer readable program codes to:
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obtain one first-dimension downlink reference signal resource, S second-dimension downlink reference signal resources, and a first correspondence relationship, configured by a network device, wherein the first correspondence relationship comprises a correspondence relationship between the S second-dimension downlink reference signal resources and N first-dimension beam-forming weights, and both S and N are integers greater than 1; measure a first-dimension downlink reference signal according to the first-dimension downlink reference signal resource to obtain a first-dimension Pre-coding matrix Indicator (PMI), wherein the first-dimension PMI indicates one of the N first-dimension beam-forming weights; select one of the S second-dimension downlink reference signal resources for measuring a second-dimension downlink reference signal, according to the obtained first-dimension PMI and the first correspondence relationship; and measure the second-dimension downlink reference signal, and feed back channel state information, according to the selected resource for measuring the second-dimension downlink reference signal, wherein the second-dimension downlink reference signal transmitted over the selected second-dimension downlink reference signal resource is transmitted after being beam-formed using the first-dimension beam-forming weight corresponding to the resource. - View Dependent Claims (19, 21, 22)
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20. (canceled)
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23. A network device, comprising:
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configure a terminal with one first-dimension downlink reference signal resource, S second-dimension downlink reference signal resources, and a first correspondence relationship comprising a correspondence relationship between the S second-dimension downlink reference signal resources and N first-dimension beam-forming weights, wherein both S and N are integers greater than 1; transmit a first-dimension downlink reference signal according to the first-dimension downlink reference signal resource, and transmit second-dimension downlink reference signals according to the second-dimension downlink reference signal resources, wherein the second-dimension downlink reference signal transmitted over each second-dimension downlink reference signal resource is transmitted after being beam-formed using the first-dimension beam-forming weight corresponding to the resource; and receive channel state information measured and fed back by the terminal using the second-dimension downlink reference signal, and t-e obtain a channel state of the terminal from the channel state information, wherein the channel state information is obtained by the terminal by selecting one of the S second-dimension downlink reference signal resources for measuring the second-dimension downlink reference signal, according to a first-dimension Pre-coding matrix Indicator (PMI) obtained by measuring the first-dimension downlink reference signal, and the first correspondence relationship, and then measuring the second-dimension downlink reference signal according to the selected second-dimension downlink reference signal resource, and the first-dimension PMI indicates one of the N first-dimension beam-forming weights. - View Dependent Claims (24, 25, 26)
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Specification