Implementing Codebook Subset Restrictions in Wireless Communication Systems
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Abstract
In MU-MIMO scenarios, a transmitting node (700) receives feedback on a feedback channel from a receiving node (1200) regarding a channel between the transmitting and receiving nodes (700, 1200). The feedback also includes preferences of the receiving node (1200). However, the feedback may not always be useful. For example, the receiving node (1200) may indicate a preferred rank in the feedback that the transmitting node (700) cannot accommodate. To address such issues, mechanisms for the transmitting node (700) to convey its preferences to the receiving node (1200) are proposed. The receiving node (1200), with such knowledge, can provide more useful feedback information to the transmitting node (700).
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Citations
60 Claims
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1-30. -30. (canceled)
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31. A method performed at a transmitting node of a wireless network to provide transmission control information to a receiving node, the method comprising:
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from the transmitting node, providing feedback restriction information to the receiving node, the feedback restriction information specifying restrictions on a feedback report to be provided from the receiving node, the feedback restriction information comprising one or more feedback restriction fields, and a corresponding feedback restriction value specifying restrictions on one or more feedback parameters of the feedback report; at the transmitting node, receiving the feedback report from the receiving node, the feedback report comprising one or more feedback parameters, each feedback parameter indicating a channel characteristic of a wireless channel between the transmitting node and the receiving node or indicating a transmission characteristic preferred by the receiving node of data transmission from the transmitting node to the receiving node; and from the transmitting node, providing the transmission control information to the receiving node based on the feedback parameters, the transmission control information specifying one or more transmission characteristics that will be applied by the transmitting node in transmitting data to the receiving node. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38)
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39. A transmitting node of a wireless network structured to provide transmission control information to a receiving node, the transmitting node comprising:
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a feedback manager structured to provide feedback restriction information to the receiving node over, the feedback restriction information specifying restrictions on a feedback report from the receiving node, the feedback restriction information comprising one or more feedback restriction fields, and a corresponding feedback restriction value specifying restrictions on one or more feedback parameters of the feedback report, and receive the feedback report from the receiving node, the feedback report comprising one or more feedback parameters, each feedback parameter indicating a channel characteristic of a wireless channel between the transmitting node and the receiving node or indicating a transmission characteristic preferred by the receiving node of data transmission from the transmitting node to the receiving node; and a transmission manager structured to provide the transmission control information to the receiving node based on the feedback parameters, the transmission control information specifying one or more transmission characteristics that will be applied by the transmitting node in transmitting data to the receiving node. - View Dependent Claims (40, 41, 42, 43, 44, 45)
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46. A method performed at a receiving node of a wireless network to provide a feedback report to a transmitting node, the method comprising:
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at the receiving node, receiving feedback restriction information from the transmitting node, the feedback restriction information specifying restrictions on a feedback report from the receiving node, the feedback restriction information comprising one or more feedback restriction fields, and a corresponding feedback restriction value specifying restrictions on one or more feedback parameters of the feedback report; at the receiving node, estimating a channel state of a communication channel between the transmitting node and the receiving node based on a reference signal transmitted from the transmitting node; from the receiving node, providing the feedback report to the transmitting node based on the estimated channel state and the feedback restriction information, the feedback report comprising one or more feedback parameters, each feedback parameter indicating a channel characteristic of a wireless channel between the transmitting node and the receiving node or indicating a transmission characteristic preferred by the receiving node of data transmission from the transmitting node to the receiving node; and at the receiving node, receiving transmission control information from the transmitting node, the transmission control information specifying one or more transmission characteristics that will be applied by the transmitting node in transmitting data to the receiving node, wherein the feedback report complies with the restrictions specified in the feedback restriction information. - View Dependent Claims (47, 48, 49, 50, 51, 52)
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53. A receiving node of a wireless network structured to provide a feedback report to a transmitting node, the method comprising:
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a channel estimator structured to estimate a channel state of a communication channel between the transmitting node and the receiving node based on a reference signal transmitted from the transmitting node; a feedback manager structured to receive feedback restriction information from the transmitting node, the feedback restriction information specifying restrictions on the feedback report from the receiving node, the feedback restriction information comprising one or more feedback restriction fields, and a corresponding feedback restriction value specifying restrictions on one or more feedback parameters of the feedback report, and provide the feedback report to the transmitting node based on the estimated channel state and the feedback restriction information, the feedback report comprising one or more feedback parameters, each feedback parameter indicating a channel characteristic of a wireless channel between the transmitting node and the receiving node or indicating a transmission characteristic preferred by the receiving node of data transmission from the transmitting node to the receiving node; and a reception manager structured to receive transmission control information from the transmitting node, the transmission control information specifying one or more transmission characteristics that will be applied by the transmitting node in transmitting data to the receiving node, wherein the feedback report complies with the restrictions specified in the feedback restriction information. - View Dependent Claims (54, 55, 56, 57, 58)
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59. A non-transitory computer-readable medium comprising, stored thereupon, program instructions that, when executed by a computer of a transmitting node of a wireless network, causes the transmitting node to provide transmission control information to a receiving node, the method by:
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providing feedback restriction information to the receiving node, the feedback restriction information specifying restrictions on a feedback report to be provided from the receiving node, the feedback restriction information comprising one or more feedback restriction fields, and a corresponding feedback restriction value specifying restrictions on one or more feedback parameters of the feedback report; receiving the feedback report from the receiving node, the feedback report comprising one or more feedback parameters, each feedback parameter indicating a channel characteristic of a wireless channel between the transmitting node and the receiving node or indicating a transmission characteristic preferred by the receiving node of data transmission from the transmitting node to the receiving node; and providing the transmission control information to the receiving node based on the feedback parameters, the transmission control information specifying one or more transmission characteristics that will be applied by the transmitting node in transmitting data to the receiving node.
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60. A non-transitory computer-readable medium comprising, stored thereupon, program instructions that, when executed by a computer of a receiving node, causes the receiving node to provide a feedback report to a transmitting node by:
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receiving feedback restriction information from the transmitting node, the feedback restriction information specifying restrictions on a feedback report from the receiving node, the feedback restriction information comprising one or more feedback restriction fields, and a corresponding feedback restriction value specifying restrictions on one or more feedback parameters of the feedback report; estimating a channel state of a communication channel between the transmitting node and the receiving node based on a reference signal transmitted from the transmitting node; providing the feedback report to the transmitting node based on the estimated channel state and the feedback restriction information, the feedback report comprising one or more feedback parameters, each feedback parameter indicating a channel characteristic of a wireless channel between the transmitting node and the receiving node or indicating a transmission characteristic preferred by the receiving node of data transmission from the transmitting node to the receiving node; and receiving transmission control information from the transmitting node, the transmission control information specifying one or more transmission characteristics that will be applied by the transmitting node in transmitting data to the receiving node, wherein the feedback report complies with the restrictions specified in the feedback restriction information.
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Specification