Patent ID: 9503243
Filing Date: 2016-11-22
CPC Classification: H04B,H04L

Claim Text:
1. A method for transmitting Channel State Information, CSI, comprising: receiving, by a user equipment, control signaling, from a base station, to instruct the user equipment to feed back channel information, wherein the control signaling includes indication information of a plurality of Channel State Information-Reference Signal, CSI-RS, resources for an aggregated feedback; performing, by the user equipment, channel estimation based on the plurality of CSI-RS resources obtained from the indication information and constructing a channel matrix according to a result of channel estimation; and determining, by the user equipment, CSI according to a preset Physical Downlink Shared Channel, PDSCH, transmission scheme over a CSI reference resource, a correspondence relationship between signals over the plurality of CSI-RS resources and signals on UERS ports and the constructed channel matrix, and transmitting the CSI to the base station; wherein determining by the user equipment the CSI according to the preset PDSCH transmission scheme over the CSI reference resource, the correspondence relationship between signals over the plurality of CSI-RS resources and signals on UERS ports and the constructed channel matrix comprises: determining, by the user equipment, a pre-coding matrix according to the preset PDSCH transmission scheme over the CSI reference resource, the correspondence relationship between signals over the plurality of CSI-RS resources and signals on UERS ports and the constructed channel matrix, and determining the CSI according to the determined pre-coding matrix, wherein a k,l ( ) represents a PDSCH or a UERS signal transmitted on UERS antenna port {7, . . . , 6+ν} over the (k,l)-th resource element, ν represents the number of layers, k represents a sub-carrier index in frequency domain, and l represents an Orthogonal Frequency Division Multiplexing, OFDM, symbol index in time domain, ã k,l ( ) represents a signal transmitted on CSI-RS antenna port {{15, . . . , 14+P 1 } 1 , {15, . . . , 14+P 2 } 2 , . . . , {15, . . . , 14+P N } N } over the (k,l)-th resource element, {15, . . . , 14+P n } n represents CSI-RS ports included in the n-th CSI-RS resource, a port number ranges from 15 to 14+P n , P n represents the number of CSI-RS ports included in the n-th CSI-RS resource, N represents the number of CSI-RS resources, and W is 1 or represents a pre-coding matrix corresponding to resource elements of UERS antenna ports.