Patent ID: 7613461

Claim:
A station side apparatus made to manage a communication resource needed for making packet data communication with a plurality of subscriber terminals and to allocate said communication resource to said subscriber terminal according to a connection request from said subscriber terminal for making the packet data communication with said subscriber terminal, characterized by comprising: an active subscriber resource managing unit for managing a communication resource needed for implementing connection processing in which, in response to a connection request from one subscriber terminal, a communication link with said subscriber terminal is established so that packet data communication with said subscriber terminal is placed into an active state; a dormant subscriber resource managing unit for managing a communication resource needed for maintaining a communication link other than at least a radio zone when said subscriber terminal which is in said active state shifts to a dormant state in which no packet data transmission actually takes place; a dormant state shift resource managing unit for managing a radio resource to be used for said subscriber terminal to be shifted to said dormant state after the implementation of said connection processing; and a control unit for, upon receipt of a new connection request from a subscriber terminal which is not in said active state nor in said dormant state, even if a free radio resource is absent in said active subscriber resource managing unit, carrying out connection processing answering said new connection request through the use of a radio resource secured in advance in said dormant state shift resource managing unit to control packet data communication with said subscriber terminal, issuing said new connection request, into an active state, wherein said control unit once places said subscriber terminal issuing said new connection request into said active state and then immediately shifts said subscriber terminal to said dormant state when the free radio resource is absent in said active subscriber resource managing unit.