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:
- sending an indication to the wireless device to disable inter-subframe channel interpolation of CSI-RS estimates across subframes;
sending an indication to the wireless device to disable combining of Channel State Information Interference Measurement, CSI-IM, 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 of CSI-RS estimates across subframes.
1 Assignment
0 Petitions
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 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 of CSI-RS estimates across subframes disabled in response to the base station disabling inter-subframe channel interpolation 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.
-
Citations
29 Claims
-
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:
-
sending an indication to the wireless device to disable inter-subframe channel interpolation of CSI-RS estimates across subframes; sending an indication to the wireless device to disable combining of Channel State Information Interference Measurement, CSI-IM, 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 of CSI-RS estimates across subframes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
-
-
14. 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:
-
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; send an indication to the wireless device to disable, via the at least one transmitter, inter-subframe channel interpolation of CSI-RS estimates across subframes at a wireless device; send an indication to the wireless device to disable, via the at least one transmitter, combining of Channel State Information Interference Measurement, CSI-IM, estimates across subframes at the 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 of CSI-RS estimates across subframes disabled in response to disabling inter-subframe channel interpolation of CSI-RS estimates across subframes at the wireless device.
-
-
15. A method of operation of a wireless device in a cellular communications network to provide Channel State Information, CSI, reporting, comprising:
-
receiving an indication from a base station of the cellular communications network to disable inter-subframe channel interpolation of Channel State Information Reference Symbol, CSI-RS, estimates across subframes; receiving an indication from the base station of the cellular communications network to disable combining of CSI Interference Measurement, CSI-IM, estimates across subframes; in response, performing one or more CSI-RS measurements with inter-subframe channel interpolation 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 (16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
-
-
27. A wireless device in a cellular communications network to provide Channel State Information, CSI, reporting, comprising:
-
means for receiving an indication from a base station of the cellular communications network to disable inter-subframe channel interpolation of Channel State Information Reference Symbol, CSI-RS, estimates across subframes; means for receiving an indication from the base station of the cellular communications network to disable combining of CSI Interference Measurement, CSI-IM, estimates across subframes; means for performing one or more CSI-RS measurements with inter-subframe channel interpolation 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 (28)
-
-
29. A wireless device in a cellular communications network to provide Channel State Information, CSI, reporting, comprising:
-
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 of Channel State Information Reference Symbol, CSI-RS, estimates across subframes; receive, via the at least one receiver, an indication from a base station of the cellular communications network to disable combining of Channel State Information Interference Measurement, CSI-IM, estimates across subframes; in response, perform one or more CSI-RS measurements with inter-subframe channel interpolation 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.
-
Specification