Patent ID: 8855718

Claim:
A signal transmission method, comprising: sending downlink signals through N sectors, wherein the N sectors are created by M sectors used to receive uplink signals, and wherein N>M; wherein the N sectors are created in at least one of the following manners by using the M sectors used to receive uplink signals: creating P1 i virtual sectors by using each physical sector among S1 physical sectors that comprises H1 i antennas, wherein S1 physical sectors are in the M sectors and i indicates a serial number of a sector among the S1 sectors, iε[1,S1], P1 i ≧2, and H1 i ≧2; and creating P2 j virtual sectors by using each group of virtual sectors among S2 groups of virtual sectors in the M sectors, wherein each group of virtual sectors comprises H2 j antennas and R j virtual sectors, R j virtual sectors in each group of virtual sectors correspond to the same physical sector, j indicates a serial number of a group of sectors among the S2 groups of sectors, jε[1,S2], P2 j ≧R j , and H2 j ≧2; and S ⁢ ⁢ 1 ≥ 0 , S ⁢ ⁢ 2 ≥ 0 , M ≥ S ⁢ ⁢ 1 + ∑ j = 1 S ⁢ ⁢ 2 ⁢ R j > 0 , and ⁢ ⁢ ( M - S ⁢ ⁢ 1 - ∑ j = 1 S ⁢ ⁢ 2 ⁢ R j ) + ∑ i = 1 S ⁢ ⁢ 1 ⁢ P ⁢ ⁢ 1 i + ∑ j = 1 S ⁢ ⁢ 2 ⁢ P ⁢ ⁢ 2 j = N .