A communication system comprising: a base station node configured to be connected to a terminal by radio communication; and a session control node configured to perform session control of the terminal, the session control node including: a table information storage unit configured to store table information in which a specific area included in a communication area of the base station node and a local area data network, LADN, whose service provision range is the specific area are associated with each other; and an additional information notification unit configured to notify, in a case of receiving a session establishment request to the LADN associated with the specific area in the table information from the terminal located in the specific area, a first base station node connected to the terminal of additional information indicating that the specific area is the service provision range of the LADN, and wherein the first base station node includes an additional information storage unit configured to store the additional information given in notification from the additional information notification unit, and wherein the additional information includes session identification information for identifying a session between the terminal and the LADN. a base station node configured to be connected to a terminal by radio communication; and a session control node configured to perform session control of the terminal, the session control node including: a table information storage unit configured to store table information in which a specific area included in a communication area of the base station node and a local area data network, LADN, whose service provision range is the specific area are associated with each other; and an additional information notification unit configured to notify, in a case of receiving a session establishment request to the LADN associated with the specific area in the table information from the terminal located in the specific area, a first base station node connected to the terminal of additional information indicating that the specific area is the service provision range of the LADN, and wherein the first base station node includes an additional information storage unit configured to store the additional information given in notification from the additional information notification unit, and wherein the additional information includes session identification information for identifying a session between the terminal and the LADN. a table information storage unit configured to store table information in which a specific area included in a communication area of the base station node and a local area data network, LADN, whose service provision range is the specific area are associated with each other; and an additional information notification unit configured to notify, in a case of receiving a session establishment request to the LADN associated with the specific area in the table information from the terminal located in the specific area, a first base station node connected to the terminal of additional information indicating that the specific area is the service provision range of the LADN, and wherein the first base station node includes an additional information storage unit configured to store the additional information given in notification from the additional information notification unit, and wherein the additional information includes session identification information for identifying a session between the terminal and the LADN.