Methods and apparatus are provided for supporting personal networking by a personal server in a mobile communication system. A request is received from a mobile station. A current position of the mobile station and a required QoS are registered in response to a request of the mobile station. When a handover is made from a resource management system of a service provider B to a resource management system of a service provider A, movement of a user agent to the resource management system of the service provider A is requested based on the current position of the mobile station and the required QoS. When the movement of the user agent is completed, a user information update request is received for updating a result of a QoS negotiation by the required QoS, and information on a selected access network, from the resource management system of the service provider A.