A signal transmission method performed by a terminal, the method comprising: • receiving, from a base station, a power parameter associated with a beam pair link, wherein the beam pair link is a path space in which a signal is transmitted by using a beam pair, the beam pair comprising a transmit beam of the terminal and a receive beam of the base station (S 102); • determining a transmit power of the terminal based on the power parameter, wherein the power parameter is one of P O_SRS,BPL ( m ), α SRS,BPL , and PL BPL (S 103), wherein BPL is the abbreviation for the term beam pair link, wherein the determining the transmit power of the terminal based on the power parameter is: ∘ determining the transmit power of the terminal based on P SRS,c ( i )=min{ P CMAX,c ( i ), 10log 10 ( M SRS,c ) + P O_SRS,c ( m ) + α SRS,c · PL c } wherein P O_SRS,c ( m ) = P O_SRS,BPL ( m ) in case the received power parameter is P O_SRS,BPL ( m ), α SRS,c = α SRS,BPL in case the received power parameter is α SRS,BPL , and PL c = PL BPL in case the received power parameter is PL BPL , wherein P CMAX,c (i) is a configured maximum output power in subframe i for serving cell c, M SRS,c is a bandwidth for a sounding reference signal, SRS, transmission, P o_SRS,c (m) is a power reference value, α SRS,c a path loss compensation factor, and PL c a downlink pathloss estimate; and • sending the sounding reference signal, SRS, to the base station by using the determined transmit power and by using the transmit beam of the beam pair (S 104). • receiving, from a base station, a power parameter associated with a beam pair link, wherein the beam pair link is a path space in which a signal is transmitted by using a beam pair, the beam pair comprising a transmit beam of the terminal and a receive beam of the base station (S 102); • determining a transmit power of the terminal based on the power parameter, wherein the power parameter is one of P O_SRS,BPL ( m ), α SRS,BPL , and PL BPL (S 103), wherein BPL is the abbreviation for the term beam pair link, wherein the determining the transmit power of the terminal based on the power parameter is: ∘ determining the transmit power of the terminal based on P SRS,c ( i )=min{ P CMAX,c ( i ), 10log 10 ( M SRS,c ) + P O_SRS,c ( m ) + α SRS,c · PL c } wherein P O_SRS,c ( m ) = P O_SRS,BPL ( m ) in case the received power parameter is P O_SRS,BPL ( m ), α SRS,c = α SRS,BPL in case the received power parameter is α SRS,BPL , and PL c = PL BPL in case the received power parameter is PL BPL , wherein P CMAX,c (i) is a configured maximum output power in subframe i for serving cell c, M SRS,c is a bandwidth for a sounding reference signal, SRS, transmission, P o_SRS,c (m) is a power reference value, α SRS,c a path loss compensation factor, and PL c a downlink pathloss estimate; and ∘ determining the transmit power of the terminal based on P SRS,c ( i )=min{ P CMAX,c ( i ), 10log 10 ( M SRS,c ) + P O_SRS,c ( m ) + α SRS,c · PL c } wherein P O_SRS,c ( m ) = P O_SRS,BPL ( m ) in case the received power parameter is P O_SRS,BPL ( m ), α SRS,c = α SRS,BPL in case the received power parameter is α SRS,BPL , and PL c = PL BPL in case the received power parameter is PL BPL , • sending the sounding reference signal, SRS, to the base station by using the determined transmit power and by using the transmit beam of the beam pair (S 104). <EOS>