A master node operating a Master Cell Group,MCG, for dual connectivity using Long Term Evolution,LTE, and New Radio,NR, wherein the master node comprising: an Xn interface connected with a secondary node operating a Secondary Cell Group,SCG; and a processor configured to: send, to the secondary node via the Xn interface, a secondary node addition request message that includes bearer option related information indicating that a bearer used for the dual connectivity is into which either a master node terminated bearer or a secondary node terminated bearer is set, wherein the bearer option related information included in the secondary node addition request message is determined based on a network slice that is provided for a User Equipment,UE, performing the dual connectivity, wherein the master node terminated bearer is a bearer whose a user plane connection to a 5G core network entity is terminated in the master node and the master node terminated bearer is: a first bearer whose transport of user plane data for the UE involves the MCG only; a second bearer whose transport of user plane data for the UE involves the SCG only; or a third bearer whose transport of user plane data for the UE involves both the MCG and the SCG, wherein the secondary node terminated bearer is a bearer whose the user plane connection to the 5G core network entity is terminated in the secondary node and the secondary node terminated bearer is: a forth bearer whose transport of user plane data for the UE involves the MCG only; a fifth bearer whose transport of user plane data for the UE involves the SCG only; or a sixth bearer whose transport of user plane data for the UE involves both the MCG and the SCG. an Xn interface connected with a secondary node operating a Secondary Cell Group,SCG; and a processor configured to: send, to the secondary node via the Xn interface, a secondary node addition request message that includes bearer option related information indicating that a bearer used for the dual connectivity is into which either a master node terminated bearer or a secondary node terminated bearer is set, wherein the bearer option related information included in the secondary node addition request message is determined based on a network slice that is provided for a User Equipment,UE, performing the dual connectivity, wherein the master node terminated bearer is a bearer whose a user plane connection to a 5G core network entity is terminated in the master node and the master node terminated bearer is: a first bearer whose transport of user plane data for the UE involves the MCG only; a second bearer whose transport of user plane data for the UE involves the SCG only; or a third bearer whose transport of user plane data for the UE involves both the MCG and the SCG, wherein a first bearer whose transport of user plane data for the UE involves the MCG only; a second bearer whose transport of user plane data for the UE involves the SCG only; or a third bearer whose transport of user plane data for the UE involves both the MCG and the SCG, wherein the secondary node terminated bearer is a bearer whose the user plane connection to the 5G core network entity is terminated in the secondary node and the secondary node terminated bearer is: a forth bearer whose transport of user plane data for the UE involves the MCG only; a fifth bearer whose transport of user plane data for the UE involves the SCG only; or a sixth bearer whose transport of user plane data for the UE involves both the MCG and the SCG. a forth bearer whose transport of user plane data for the UE involves the MCG only; a fifth bearer whose transport of user plane data for the UE involves the SCG only; or a sixth bearer whose transport of user plane data for the UE involves both the MCG and the SCG. <EOS>