Even if a communication resource needed for connection processing with a user (subscriber terminal) and an actual packet data communication is in a full condition in an active subscriber resource managing unit, when a communication resource needed for only maintaining a logical connection with a user is in a free condition in a dormant subscriber resource managing unit, for accommodating a new user in a dormant state through this free resource, a control unit carries out connection processing answering a new connection request through the use of a radio resource secured in advance or a free radio resource produced by shifting a portion of active users forcibly to a dormant state. This enables using a packet communication total resource without waste and considerably improving the packet service connectivity to a user.