Method and device for delivering service data

摘要

A method and device for sending service data are provided in the present invention, so as to realize simplification of a precoding matrix calculation method. The method includes: a network side executing the following steps: calculating a value space matrix according to a signal channel matrix of a serving cell of a terminal; calculating a null space matrix according to an interference channel matrix of a coordinating cell of the terminal; projecting a vector of the value space matrix to a space on which a vector of the null space matrix is located to obtain a precoding matrix of the terminal; and sending the service data in the serving cell of the terminal according to the precoding matrix.

主权项

1. A method for sending service data, comprising:
calculating, by a network side device, a value space matrix according to a signal channel matrix of a serving cell of a terminal; calculating, by the network side device, a null space matrix according to an interference channel matrix of a coordinating cell of the terminal; projecting, by the network side device, a vector of the value space matrix to a space on which a vector of the null space matrix is located to obtain a precoding matrix of the terminal; and sending, by the network side device, the service data in the serving cell of the terminal according to the precoding matrix; wherein the value space matrix is recorded as [y1, y2, . . . yn], the null space matrix is recorded as [x1, x2, . . . xm], and the precoding matrix is recorded as [w1, w2, . . . wn],w1=⟨y1,x1,⟩⁢x1x122+⟨y1⁢⁢x2⟩⁢x2x222+…+⟨y1⁢⁢xm⟩⁢xmxm22w2=⟨y2,x1,⟩⁢x1x122+⟨y2⁢⁢x2⟩⁢x2x222+…+⟨y2⁢⁢xm⟩⁢xmxm22⋮wn=⟨yn,x1,⟩⁢x1x122+⟨yn⁢⁢x2⟩⁢x2x222+…+⟨yn⁢⁢xm⟩⁢xmxm22 wherein m=n×(c−1), c is a total number of cells participating in a CoMP, and n is a rank of the signal channel matrix.