A method implemented at a first New Radio, NR, user equipment, UE, which supports NR radio access technology comprising: determining a sidelink transmission mode for transmitting, the sidelink transmission mode being one of a first mode corresponding to the NR radio access technology and a second mode corresponding to Long Term Evolution, LTE, radio access technology; and transmitting a sidelink signal according to the sidelink transmission mode using a sidelink resource configured by a network node which serves the first NR UE, wherein the first NR UE is configured with a sidelink resource within which a part of parameters are assigned with a first value for the first mode and a second value for the second mode and other parameters are assigned with a value common to the first and second modes; wherein transmitting a sidelink signal comprises: in response to the determination of the sidelink transmission mode as the first mode, transmitting the sidelink signal within the sidelink resource using the corresponding parameters for the first mode according to the first mode; and in response to the determination of the sidelink transmission mode as the second mode, transmitting the sidelink signal within the sidelink resource using the corresponding parameters for the second mode according to the second mode, and wherein the parameter assignment is specific to a pool of available resources broadcasted by the eNB serving the first NR UE, and different modulation and coding schemes, MCSs, are configured for the LTE based and NR based sidelink transmissions for a specific pool, while common maximum transmission power is configured for both LTE based and NR based sidelink transmissions. determining a sidelink transmission mode for transmitting, the sidelink transmission mode being one of a first mode corresponding to the NR radio access technology and a second mode corresponding to Long Term Evolution, LTE, radio access technology; and transmitting a sidelink signal according to the sidelink transmission mode using a sidelink resource configured by a network node which serves the first NR UE, wherein the first NR UE is configured with a sidelink resource within which a part of parameters are assigned with a first value for the first mode and a second value for the second mode and other parameters are assigned with a value common to the first and second modes; wherein transmitting a sidelink signal comprises: in response to the determination of the sidelink transmission mode as the first mode, transmitting the sidelink signal within the sidelink resource using the corresponding parameters for the first mode according to the first mode; and in response to the determination of the sidelink transmission mode as the second mode, transmitting the sidelink signal within the sidelink resource using the corresponding parameters for the second mode according to the second mode, and wherein the parameter assignment is specific to a pool of available resources broadcasted by the eNB serving the first NR UE, and different modulation and coding schemes, MCSs, are configured for the LTE based and NR based sidelink transmissions for a specific pool, while common maximum transmission power is configured for both LTE based and NR based sidelink transmissions. in response to the determination of the sidelink transmission mode as the first mode, transmitting the sidelink signal within the sidelink resource using the corresponding parameters for the first mode according to the first mode; and in response to the determination of the sidelink transmission mode as the second mode, transmitting the sidelink signal within the sidelink resource using the corresponding parameters for the second mode according to the second mode, and wherein the parameter assignment is specific to a pool of available resources broadcasted by the eNB serving the first NR UE, and different modulation and coding schemes, MCSs, are configured for the LTE based and NR based sidelink transmissions for a specific pool, while common maximum transmission power is configured for both LTE based and NR based sidelink transmissions.