METHOD AND APPARATUS FOR SUPPORTING ADAPTIVE CHANNEL STATE INFORMATION FEEDBACK RATE IN MULTI-USER COMMUNICATION SYSTEMS
First Claim
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1. A method for wireless communications, comprising:
- receiving one or more training sequences from one or more apparatuses;
estimating one or more channels associated with the one or more apparatuses based on the training sequences; and
calculating a metric for each of the apparatuses based at least on a value associated with each of the estimated channels.
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Abstract
Certain aspects of the present disclosure relate to techniques for achieving adaptive channel state information (CSI) feedback rate in multi-user communication systems. A rate by which CSI feedback can be transmitted from each user station of a wireless system to a serving access point may be adjusted based on evolution of a channel between that user station and the access point.
155 Citations
73 Claims
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1. A method for wireless communications, comprising:
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receiving one or more training sequences from one or more apparatuses; estimating one or more channels associated with the one or more apparatuses based on the training sequences; and calculating a metric for each of the apparatuses based at least on a value associated with each of the estimated channels. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. An apparatus for wireless communications, comprising:
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a receiver configured to receive one or more training sequences from one or more other apparatuses; an estimator configured to estimate one or more channels associated with the one or more other apparatuses based on the training sequences; and a first circuit configured to calculate a metric for each of the other apparatuses based at least on a value associated with each of the estimated channels. - View Dependent Claims (18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. An apparatus for wireless communications, comprising:
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means for receiving one or more training sequences from one or more other apparatuses; means for estimating one or more channels associated with the one or more other apparatuses based on the training sequences; and means for calculating a metric for each of the other apparatuses based at least on a value associated with each of the estimated channels. - View Dependent Claims (34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. A computer-program product for wireless communications, comprising a computer-readable medium comprising instructions executable to:
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receive one or more training sequences from one or more apparatuses; estimate one or more channels associated with the one or more apparatuses based on the training sequences; and calculate a metric for each of the apparatuses based at least on a value associated with each of the estimated channels.
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50. An access point, comprising:
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at least one antenna; a receiver configured to receive via the at least one antenna one or more training sequences from one or more wireless nodes; an estimator configured to estimate one or more channels associated with the one or more wireless nodes based on the training sequences; and a first circuit configured to calculate a metric for each of the wireless nodes based at least on a value associated with each of the estimated channels.
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51. A method for wireless communications, comprising:
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transmitting a training sequence to an apparatus; receiving, from the apparatus, a request for channel state information (CSI) and another training sequence, wherein the request is based at least on the training sequence; determining, in response to the request, CSI based on the other training sequence; transmitting the CSI to the apparatus; and receiving data from the apparatus, wherein the data were transmitted based at least on the CSI. - View Dependent Claims (52, 53, 54, 55, 56, 57)
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58. An apparatus for wireless communications, comprising:
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a transmitter configured to transmit a training sequence to another apparatus; a receiver configured to receive, from the other apparatus, a request for channel state information (CSI) and another training sequence, wherein the request is based at least on the training sequence; and a first circuit configured to determine, in response to the request, CSI based on the other training sequence, wherein the transmitter is also configured to transmit the CSI to the other apparatus, and the receiver is also configured to receive data from the other apparatus, wherein the data were transmitted based at least on the CSI. - View Dependent Claims (59, 60, 61, 62, 63, 64)
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65. An apparatus for wireless communications, comprising:
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means for transmitting a training sequence to another apparatus; means for receiving, from the other apparatus, a request for channel state information (CSI) and another training sequence, wherein the request is based at least on the training sequence; and means for determining, in response to the request, CSI based on the other training sequence, wherein the means for transmitting is further configured to transmit the CSI to the other apparatus, and the means for receiving is further configured to receive data from the other apparatus, wherein the data were transmitted based at least on the CSI. - View Dependent Claims (66, 67, 68, 69, 70, 71)
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72. A computer-program product for wireless communications, comprising a computer-readable medium comprising instructions executable to:
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transmit a training sequence to an apparatus; receive, from the apparatus, a request for channel state information (CSI) and another training sequence, wherein the request is based at least on the training sequence; determine, in response to the request, CSI based on the other training sequence; transmit the CSI to the apparatus; and receive data from the apparatus, wherein the data were transmitted based at least on the CSI.
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73. An access terminal, comprising:
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at least one antenna; a transmitter configured to transmit via the at least one antenna a training sequence to an access point; a receiver configured to receive, from the access point via the at least one antenna, a request for channel state information (CSI) and another training sequence, wherein the request is based at least on the training sequence; and a first circuit configured to determine, in response to the request, CSI based on the other training sequence, wherein the transmitter is also configured to transmit via the at least one antenna the CSI to the access point, and the receiver is also configured to receive data from the access point via the at least one antenna, wherein the data were transmitted based at least on the CSI.
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Specification