The present solution discloses a method and apparatus for controlling demodulation reference signal allocation of a user equipment by utilizing a cyclic shift subset determined for demodulation reference signal multiplexing orders supported by the user equipment. Within the cyclic shift subset, demodulation reference signal resources that cause the most significant interference to each other are identified, and cyclic shifts corresponding to the identified demodulation reference signal resources, are linked with as orthogonal complementary multiplexing resources as possible. If more than one cyclic shift subsets are determined for a demodulation reference signal multiplexing order, at least one cyclic shift subset is ignored for said demodulation reference signal multiplexing order.