Patent ID: 7126924

Claim:
A radio base station/radio base station controller for carrying out communication with a mobile station by using a radio channel, comprising: a control unit for controlling a connected state in which the radio channel for carrying out communication with the mobile station is secured and a dormant state in which a call is brought into a suspended state and the radio channel is disconnected; a memory for storing an inactivity timer value as a timing when the connected state is changed to the dormant state, according to one of an application type, a connection destination type, and a traffic pattern; and an inactivity timer for starting to count up in response to reception of a packet from the mobile station or transmission of a packet to the mobile station, wherein in a case where the radio base station/radio base station controller transmits or receives data to or from the mobile station, the control unit acguires information of one of the application type, the connection destination type, and the traffic pattern in the transmitted or received data, wherein the control unit refers to the memory based on the acquired information of one of the application type, the connection destination type, and the traffic pattern to obtain an inactivity timer value and sets the inactivity timer value, wherein when a count value of the inactivity timer reaches the set inactivity timer value, the control unit carries out a control to change the connected state to the dormant state, and wherein: the memory further stores the inactivity timer value for each of the application type, the connection destination type, and the traffic pattern correspondingly to user information; and wherein the control unit further acquires the user information and sets the inactivity timer value for each user and for each of the application type, the connection destination type or the traffic pattern.