摘要:
In an environment including a first service providing system and a second service providing system, the first service providing system forwards common authentication information received from a terminal to the second service providing system to perform authentication when the terminal that is located in a service provision area of the first service providing system and has requested connection is a visiting user. The first service providing system makes a connection request to the second service providing system based on the authentication result that is provided from the second service providing system based on the common authentication information. The second service providing system provides the communication service to the terminal by using the resources of the first service providing system.