Station side apparatus, resource allocating method in station side apparatus and mobile communication system

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 placed into said active state is shifted to a dormant state in which no packet data transmission actually takes place;
• 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, if a radio resource secured in advance is absent, forcibly shifting a portion of subscriber terminals placed into an active state to a dormant state to produce a free resource from a radio resource and for carrying out connection processing answering said new connection request through the use of the free radio resource 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 radio resource secured in advance is absent.

A resource allocating method in 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:

• 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 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, and a radio resource to be used for said subscriber terminal to be shifted to said dormant state after the implementation of said connection processing;
• upon receipt of a new connection request from a subscriber terminal which is not in said active state nor in said dormant state, making a decision as to whether or not said communication resource is in a free condition in said dormant subscriber resource managing unit;
• when said communication resource is in a free condition, 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 for shifting to said dormant state to control packet data communication with said subscriber terminal, issuing said new connection request, into an active state;
• and
• placing said subscriber terminal issuing said new connection request into said active state and then immediately shifting said subscriber terminal to said dormant state when the free radio resource is absent in said active subscriber resource managing unit.

A resource allocating method in 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:

• 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 and a communication resource needed for maintaining a communication link other than at least a radio zone when said subscriber terminal placed into said active state is shifted to a dormant state in which no packet data transmission actually takes place;
• upon receipt of a new connection request from a subscriber terminal which is not in said active state nor in said dormant state, if a radio resource secured in advance is absent, forcibly shifting a portion of subscriber terminals placed into an active state to a dormant state to make a radio resource free;
• carrying out connection processing answering said new connection request through the use of the free radio resource to control packet data communication with said subscriber terminal issuing said new connection request into an active state;
• and
• placing aid subscriber terminal issuing said new connection request into said active state and then immediately shifting said subscriber terminal to said dormant state when the radio resource secured in advance is absent.