METHOD FOR DYNAMIC CSI FEEDBACK
First Claim
1. A method of operation of a base station of a cellular communications network to control Channel State Information Reference Symbol, CSI-RS, based channel estimation at a wireless device, comprising:
- disabling, at a wireless device, inter-subframe channel interpolation and/or filtering of CSI-RS estimates across subframes; and
receiving one or more Channel State Information, CSI, reports from the wireless device that are generated by the wireless device with disabled inter-subframe channel interpolation and/or filtering of CSI-RS estimates across subframes.
1 Assignment
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Accused Products
Abstract
Systems and methods for providing Channel State Information (CSI) feedback in a cellular communications network are disclosed. In some embodiments, a base station of a cellular communications network disables inter-subframe channel interpolation and/or filtering of CSI-RS estimates across subframes at the wireless device and receives one or more CSI reports from the wireless device that are generated by the wireless device with inter-subframe channel interpolation and/or filtering of CSI-RS estimates across subframes disabled in response to the base station disabling inter-subframe channel interpolation and/or filtering of CSI-RS estimates across subframes at the wireless device. In this manner, CSI feedback is improved particularly in embodiments in which the base station transmits a beamformed CSI-RS resource(s) and reuses the same CSI-RS resource(s) for different beams over time.
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Citations
39 Claims
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1. A method of operation of a base station of a cellular communications network to control Channel State Information Reference Symbol, CSI-RS, based channel estimation at a wireless device, comprising:
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disabling, at a wireless device, inter-subframe channel interpolation and/or filtering of CSI-RS estimates across subframes; and receiving one or more Channel State Information, CSI, reports from the wireless device that are generated by the wireless device with disabled inter-subframe channel interpolation and/or filtering of CSI-RS estimates across subframes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A base station of a cellular communications network enabled to control Channel State Information Reference Symbol, CSI-RS, based channel estimation at a wireless device, comprising:
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means for disabling, at a wireless device, inter-subframe channel interpolation and/or filtering of CSI-RS estimates across subframes; and means for receiving a Channel State Information, CSI, report from the wireless device that is generated by the wireless device with inter-subframe channel interpolation and/or filtering of CSI-RS estimates across subframes disabled in response to disabling inter-subframe channel interpolation and/or filtering of CSI-RS estimates across subframes at the wireless device. - View Dependent Claims (16, 17)
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18. A base station of a cellular communications network 404 enabled to control Channel State Information Reference Symbol, CSI-RS, based channel estimation at a wireless device, comprising:
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at least one transmitter; at least one receiver; at least one processor; and memory storing software instructions executable by the at least one processor whereby the base station is operative to; disable, via the at least one transmitter, inter-subframe channel interpolation and/or filtering of CSI-RS estimates across subframes at a wireless device; and receive, via the at least one receiver, a Channel State Information, CSI, report from the wireless device that is generated by the wireless device with inter-subframe channel interpolation and/or filtering of CSI-RS estimates across subframes disabled in response to disabling inter-subframe channel interpolation and/or filtering of CSI-RS estimates across subframes at the wireless device.
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19. (canceled)
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20. (canceled)
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21. A method of operation of a wireless device in a cellular communications network to provide Channel State Information, CSI, reporting, comprising:
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receiving an indication from a base station of the cellular communications network to disable inter-subframe channel interpolation and/or filtering of Channel State Information Reference Symbol, CSI-RS, estimates across subframes; in response, performing one or more CSI-RS measurements with inter-subframe channel interpolation and/or filtering of CSI-RS estimates across subframes disabled; and transmitting a CSI report to the base station determined from the one or more CSI-RS measurements. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33)
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34. A wireless device in a cellular communications network to provide Channel State Information, CSI, reporting, comprising:
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means for receiving an indication from a base station of the cellular communications network to disable inter-subframe channel interpolation and/or filtering of Channel State Information Reference Symbol, CSI-RS, estimates across subframes; means for performing one or more CSI-RS measurements with inter-subframe channel interpolation and/or filtering of CSI-RS estimates across subframes disabled in response to receiving the indication; and means for transmitting a CSI report to the base station determined from the one or more CSI-RS measurements. - View Dependent Claims (35, 36)
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37. A wireless device in a cellular communications network to provide Channel State Information, CSI, reporting, comprising:
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at least one transmitter; at least one receiver; at least one processor; and memory storing software instructions executable by the at least one processor whereby the wireless device is operative to; receive, via the at least one receiver, an indication from a base station of the cellular communications network to disable inter-subframe channel interpolation and/or filtering of Channel State Information Reference Symbol, CSI-RS, estimates across subframes; in response, perform one or more CSI-RS measurements with inter-subframe channel interpolation and/or filtering of CSI-RS estimates across subframes disabled; and transmitting a CSI report to the base station determined from the one or more CSI-RS measurements.
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38. (canceled)
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39. (canceled)
Specification