Patent ID: 9048909
Filing Date: 2015-06-02
Classification: H04B,H04L

Abstract:
1. A method for transmitting channel state information, wherein, comprising: receiving, by a terminal equipment, a control signaling sent by base station, the control signaling informs the terminal equipment that channel state information feedback is needed and feedback mode to be used by the channel state information feedback; determining, by the terminal equipment, Rank Indication (RI) value and pre-coding matrix in compressed pre-coding matrix set and determining the value of corresponding pre-coding matrix indicator information according to preset corresponding relationship of the pre-coding matrix indicator information with codebook index in source codebook; sending, by the terminal equipment, the determined RI value and the value of pre-coding matrix indicator information to the base station as per the feedback mode; therein, determining, by the terminal equipment, Rank Indication (RI) value and pre-coding matrix in compressed pre-coding matrix set and determining the value of corresponding pre-coding matrix indicator information according to preset corresponding relationship of the pre-coding matrix indicator information with codebook index in source codebook, specifically comprises: when the pre-coding matrix indicator information to be determined by the terminal equipment specifically comprises the first pre-coding matrix indicator information and the second pre-coding matrix indicator information, the terminal equipment determines the value of the first pre-coding matrix indicator information and the second pre-coding matrix indicator information according to the RI value and preset corresponding relationship of the first pre-coding matrix indicator information and the second pre-coding matrix indicator information with the two codebook indexes i when the pre-coding matrix indicator information to be determined by the terminal equipment specifically refers to a piece of pre-coding matrix indicator information, the terminal equipment determines the value of the pre-coding matrix indicator information according to the RI value and the preset corresponding relationship of the pre-coding matrix indicator information with the codebook index pair (i when the pre-coding matrix indicator information to be determined by the terminal equipment specifically comprises the first pre-coding matrix indicator information and the second pre-coding matrix indicator information, the terminal equipment determines the value of the first pre-coding matrix indicator information and the second pre-coding matrix indicator information according to the RI value and the preset corresponding relationship of the pre-coding matrix indicator information pair composed of the first pre-coding matrix indicator information and the second pre-coding matrix indicator information with the codebook index pair (i when the pre-coding matrix indicator information to be determined by the terminal equipment specifically refers to a piece of pre-coding matrix indicator information, the terminal equipment determines the value of the pre-coding matrix indicator information according to the RI value and the preset corresponding relationship of the pre-coding matrix indicator information with the two codebook indexes i