A method performed by a terminal in a coordinated multi-point, CoMP, system, the CoMP system comprising a plurality of network devices and the terminal, the method comprising the steps of: • receiving (S 310) a plurality of pieces of downlink control information, DCI, from at least one network device among the plurality of network devices, ∘ wherein each piece of DCI among the plurality of pieces of DCI includes a piece of trigger information for at least one type of reference signal, so that in the plurality of pieces of DCI a plurality of pieces of trigger information are contained, and the plurality of pieces of trigger information and the plurality of pieces of DCI are in a one-to-one correspondence, and each piece of trigger information is used to indicate, to the terminal, a resource used by the at least one type of reference signal, ∘ wherein each piece of DCI among the plurality of pieces of DCI corresponds to a different subcarrier spacing used to carry the piece of DCI; • determining (S 320) as target trigger information among the plurality of pieces of trigger information, the piece of trigger information among the plurality of pieces of trigger information which is carried by using a target subcarrier spacing, ∘ wherein the target trigger information is trigger information that is considered to be valid by the terminal, and all other pieces of trigger information among the plurality of pieces of trigger information are considered to be invalid by the terminal, ∘ wherein it is stipulated in a protocol or otherwise pre-defined that the terminal considers only the piece of trigger information carried by using the target subcarrier spacing as being the valid piece of trigger information and that the terminal considers all other pieces of trigger information as the invalid pieces of trigger information; • sending (S 330), based on the resource indicated by the target trigger information, the at least one type of reference signal. • receiving (S 310) a plurality of pieces of downlink control information, DCI, from at least one network device among the plurality of network devices, ∘ wherein each piece of DCI among the plurality of pieces of DCI includes a piece of trigger information for at least one type of reference signal, so that in the plurality of pieces of DCI a plurality of pieces of trigger information are contained, and the plurality of pieces of trigger information and the plurality of pieces of DCI are in a one-to-one correspondence, and each piece of trigger information is used to indicate, to the terminal, a resource used by the at least one type of reference signal, ∘ wherein each piece of DCI among the plurality of pieces of DCI corresponds to a different subcarrier spacing used to carry the piece of DCI; ∘ wherein each piece of DCI among the plurality of pieces of DCI includes a piece of trigger information for at least one type of reference signal, so that in the plurality of pieces of DCI a plurality of pieces of trigger information are contained, and the plurality of pieces of trigger information and the plurality of pieces of DCI are in a one-to-one correspondence, and each piece of trigger information is used to indicate, to the terminal, a resource used by the at least one type of reference signal, ∘ wherein each piece of DCI among the plurality of pieces of DCI corresponds to a different subcarrier spacing used to carry the piece of DCI; • determining (S 320) as target trigger information among the plurality of pieces of trigger information, the piece of trigger information among the plurality of pieces of trigger information which is carried by using a target subcarrier spacing, ∘ wherein the target trigger information is trigger information that is considered to be valid by the terminal, and all other pieces of trigger information among the plurality of pieces of trigger information are considered to be invalid by the terminal, ∘ wherein it is stipulated in a protocol or otherwise pre-defined that the terminal considers only the piece of trigger information carried by using the target subcarrier spacing as being the valid piece of trigger information and that the terminal considers all other pieces of trigger information as the invalid pieces of trigger information; ∘ wherein the target trigger information is trigger information that is considered to be valid by the terminal, and all other pieces of trigger information among the plurality of pieces of trigger information are considered to be invalid by the terminal, ∘ wherein it is stipulated in a protocol or otherwise pre-defined that the terminal considers only the piece of trigger information carried by using the target subcarrier spacing as being the valid piece of trigger information and that the terminal considers all other pieces of trigger information as the invalid pieces of trigger information; • sending (S 330), based on the resource indicated by the target trigger information, the at least one type of reference signal.