Device and Method for Controlling State in Cellular System

A terminal state controlling method, comprising:

• transiting a terminal into a scheduling-OFF state when packet data are not received from the terminal in a scheduling-ON state for a predetermined time;
• and
• transiting the terminal into a dormant state when packet data are not received from the terminal in the scheduling-OFF state for a predetermined time,
• wherein the scheduling-ON state, the scheduling-OFF state, and the dormant state are states in which uplink and downlink traffic channels are allocated to the terminal,
• the scheduling-ON state being a state in which the uplink and downlink traffic channel resources are allocated to the terminal according to the terminal-supportable QoS,
• the scheduling-OFF state being a state in which the terminal discontinuously transmits/receives the packet data through the uplink and downlink traffic channels, and
• the dormant state being a state in which the terminal breaks a synchronization to the uplink and downlink traffic channels.

A terminal state controlling apparatus comprising:

• a resource manager for allocating uplink and downlink traffic channels to a terminal on the establishment of the terminal in an active state, and the terminal breaking a synchronization to the uplink traffic channel on the establishment of the terminal in a dormant state;
• and
• a scheduler for allocating a uplink traffic channel and a downlink traffic channel resource to the terminal according to the terminal-supportable QoS when the sub-state of the terminal in the active state is established as a scheduling-ON state,
• and for allowing the terminal to discontinuously receive and transmit packet data through the uplink and downlink traffic channels when the terminal in the active state has a sub-state established as a scheduling-OFF state.