Abstract: A call connection request from an access terminal is suppressed in a state in which the base station judges that the call connection is impossible, thereby suppressing a waste of the wireless band and the generation of noise. A BCMCS management block of an access point receives information indicating whether there is an allocable channel, from a channel management block of the access point, and information indicating whether the start of QoS can be accepted, from a QoS acceptance determination block of the access point, and the BCMCS management block distributes the information to the access terminal. Accordingly, the access point can inform the access terminal that it is not serviceable before channel allocation is attempted.

Abstract: A call connection request from an access terminal is suppressed in a state in which the base station judges that the call connection is impossible, thereby suppressing a waste of the wireless band and the generation of noise. A BCMCS management block of an access point receives information indicating whether there is an allocable channel, from a channel management block of the access point, and information indicating whether the start of QoS can be accepted, from a QoS acceptance determination block of the access point, and the BCMCS management block distributes the information to the access terminal. Accordingly, the access point can inform the access terminal that it is not serviceable before channel allocation is attempted.

Abstract: A mobile IP data communication system is provided, which is capable of preventing dropouts of packet addressed to the mobile station at the time of switching the packet control station as a result of movement of the mobile station. A packet on an IP data connection that is used by the above-stated mobile station is forwarded to a next packet control station from a previous packet control station of the mobile station. The order of packets is correctly maintained by executing a process that a packet delivered to the next packet control station from the access router while the forwarding is in progress is buffered and a forwarding packet is put through ahead of such buffered packet or is forwarded only up to a time point when a packet from the access router is delivered.