A V2X communication method that stores system information of a cell connected to a network before being disconnected from the network, generates a connection with a first network node using the stored system information when the power of UE is turned on, transmits to a second network node a connection request message including an indicator indicating that a PDN connection is unnecessary, and receives from the second network node a connection approval message indicating the completion of a network connection without PDN connection, and user equipment are disclosed.