A device for a first node used for multi-antenna transmission, comprising: a first processor, receiving, from a second node, first downlink information, Q1 piece(s) of second downlink information and Q2 piece(s) of third downlink information; wherein the first downlink information is an information element, the first downlink information comprises a first field and a second field, the first field of the first downlink information is used for determining a first radio resource, the second field of the first downlink information is used for determining a second radio resource; the first radio resource is reserved for a first-type reference signal, the second radio resource is reserved for a second-type reference signal; a target receiver of the first-type reference signal comprises the first node, a transmitter of the second-type reference signal is the first node; a measurement on the first-type reference signal is used by the first node for generating the second-type reference signal; the first node is a User Equipment, UE; wherein the Q1 piece(s) of second downlink information is(are) respectively used for determining Q1 first-type radio resource(s) and Q1 first-type identifier(s), the Q1 first-type identifier(s) respectively corresponds(correspond) to the Q1 first-type radio resource(s), the first field of the first downlink information is used for determining a first identifier, the first radio resource is one of the Q1 first-type radio resource(s), a first-type identifier of the Q1 first-type identifier(s) corresponding to the first radio resource is the first identifier; the Q2 piece(s) of third downlink information is(are) respectively used for determining Q2 second-type radio resource(s) and Q2 second-type identifier(s), the Q2 second-type identifier(s) respectively corresponds(correspond) to the Q2 second-type radio resource(s), the second field of the first downlink information is used for determining a second identifier, the second radio resource is one of the Q2 second-type radio resource(s), a second-type identifier of the Q2 second-type identifier(s) corresponding to the second radio resource is the second identifier; the Q1 and the Q2 are positive integers respectively; and wherein the second downlink information is carried by a Radio Resource Control, RRC, signaling and the third downlink information is carried by an RRC signaling. a first processor, receiving, from a second node, first downlink information, Q1 piece(s) of second downlink information and Q2 piece(s) of third downlink information; wherein the first downlink information is an information element, the first downlink information comprises a first field and a second field, the first field of the first downlink information is used for determining a first radio resource, the second field of the first downlink information is used for determining a second radio resource; the first radio resource is reserved for a first-type reference signal, the second radio resource is reserved for a second-type reference signal; a target receiver of the first-type reference signal comprises the first node, a transmitter of the second-type reference signal is the first node; a measurement on the first-type reference signal is used by the first node for generating the second-type reference signal; the first node is a User Equipment, UE; wherein the Q1 piece(s) of second downlink information is(are) respectively used for determining Q1 first-type radio resource(s) and Q1 first-type identifier(s), the Q1 first-type identifier(s) respectively corresponds(correspond) to the Q1 first-type radio resource(s), the first field of the first downlink information is used for determining a first identifier, the first radio resource is one of the Q1 first-type radio resource(s), a first-type identifier of the Q1 first-type identifier(s) corresponding to the first radio resource is the first identifier; the Q2 piece(s) of third downlink information is(are) respectively used for determining Q2 second-type radio resource(s) and Q2 second-type identifier(s), the Q2 second-type identifier(s) respectively corresponds(correspond) to the Q2 second-type radio resource(s), the second field of the first downlink information is used for determining a second identifier, the second radio resource is one of the Q2 second-type radio resource(s), a second-type identifier of the Q2 second-type identifier(s) corresponding to the second radio resource is the second identifier; the Q1 and the Q2 are positive integers respectively; and wherein the second downlink information is carried by a Radio Resource Control, RRC, signaling and the third downlink information is carried by an RRC signaling.