Obtaining method and device for channel information
First Claim
1. A method for acquiring channel information, comprising:
- for one subband, a User Equipment (UE) acquiring Rank Indicator (RI) of a current channel, wherein a rank (ν
) of said current channel is indicated in the RI, and the ν
is a positive integral number not greater than 8;
the user equipment determining a total number of Precoding Matrix Indicator (PMI) required to be fed back to a base station according to the ν
, and transmitting the PMI corresponding to the total number and the RI to the base station; and
the base station acquiring channel information of said subband according to the PMI corresponding to the total number and the RI;
wherein the PMI corresponding to the total number, when the total number is 1, is used for obtaining one Precoding Matrix or the PMIs corresponding to the total number, when the total number is greater than 1, are used for jointly obtaining one Precoding Matrix, the total number is an integral.
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Abstract
A method and device for acquiring channel information are disclosed in the present invention, to solve a technical problem in the related art that the channel information cannot be fed back flexibly according to requirements. The method includes: for one subband, User Equipment (UE) acquires Rank Indicator (RI) information of a current channel, in which the RI information indicates a rank (ν) of the current channel, and ν is a positive integral number not greater than 8; the user equipment determines the quantity of the Precoding Matrix Indicator (PMI) information required to be fed back to a base station according to ν, and transmits the PMI information in said quantity and the RI information to the base station; the base station acquires the channel information of said subband according to the PMI information in said quantity and said RI information.
14 Citations
10 Claims
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1. A method for acquiring channel information, comprising:
-
for one subband, a User Equipment (UE) acquiring Rank Indicator (RI) of a current channel, wherein a rank (ν
) of said current channel is indicated in the RI, and the ν
is a positive integral number not greater than 8;the user equipment determining a total number of Precoding Matrix Indicator (PMI) required to be fed back to a base station according to the ν
, and transmitting the PMI corresponding to the total number and the RI to the base station; andthe base station acquiring channel information of said subband according to the PMI corresponding to the total number and the RI; wherein the PMI corresponding to the total number, when the total number is 1, is used for obtaining one Precoding Matrix or the PMIs corresponding to the total number, when the total number is greater than 1, are used for jointly obtaining one Precoding Matrix, the total number is an integral. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A device for acquiring channel information, comprising:
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a receiving module, which is configured to receive Precoding Matrix Indicator (PMI) corresponding to a total number of PMI transmitted by a user equipment and Rank Indicator (RI) of a current channel; and an acquiring module, which is configured to acquire channel information of a subband according to the PMI corresponding to the total number and the RI received by said receiving module; wherein the total number of the PMI is determined by the user equipment according to a rank ν
of the current channel, the PMI corresponding to the total number, when the total number is 1 is used for obtaining one Precoding Matrix or the PMIs corresponding to the total number, when the total number is greater than 1, are used for jointly obtaining one Precoding Matrix, the total number is an integral, and ν
is indicated in said RI and ν
is a positive integral number not greater than 8. - View Dependent Claims (9, 10)
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Specification