Provided is, in 5GS, a communication unit for implementing a Vertical LAN. Provided are, in 5GS, a unit for registration of a UE, a session establishment procedure, and generation of a 5GLAN group for implementing the Vertical LAN and a 5GLAN service, a unit for starting communication using the Vertical LAN and the 5GLAN service, and the communication unit. In addition, provided are a unit for modifying a configuration of the UE registered with a network, a unit for managing an established session, a unit for deleting the 5GLAN group, a unit for deleting the UE from the 5GLAN group, and a unit for stopping communication using the Vertical LAN and the 5GLAN service.