Abstract: A communication control system 1 according to the present invention is provided with a home agent apparatus 10, a plurality of firewall devices 20-40, and a mobile station 50. When the mobile station 50 is connected, for example, to the firewall device 20, the firewall device 20 receives identification information and a configuration file of the mobile station 50 from the home agent apparatus 10 and constructs a firewall for the mobile station 50, using the configuration file. When the firewall device 20 receives an IP packet, it selects a firewall suitable for the mobile station 50 being a destination of the packet and determines the propriety of passage thereof according to a filtering condition set in this firewall.

Abstract: A router apparatus used in an IPv6 multihome network and capable of exchanging a network prefix as route information with an adjacent router is disclosed. The router apparatus comprises a pair information generator (52) configured to associate a prefix assigned from the network with a default route to generate a pair information item, and a routing protocol processor (51) configured to distribute the pair information item of the prefix and the associated default route to the adjacent router using a routing protocol.

Abstract: A communication system (1) is provided with URs (20a to 20h) and a source terminal (10). The URs (20a to 20h) include: entry holders (21a to 21h) for holding forwarding addresses; message processors (25) for registering the addresses of other URs, the addresses being associated with a source terminal address and a multicast group address, in the entry holders (21a to 21h) as the forwarding addresses; message providers (26) for providing the source terminal address with join request messages which request the addition of the addresses of the URs to sending addresses. The source terminal (10) includes: an entry holder (11) for holding a sending address; and a message processor 14 for registering the addresses of the URs (20a to 20h) in the entry holder 11 as sending addresses based on the join request messages.

Abstract: A communication control system 1 according to the present invention is provided with a home agent apparatus 10, a plurality of firewall devices 20-40, and a mobile station 50. When the mobile station 50 is connected, for example, to the firewall device 20, the firewall device 20 receives identification information and a configuration file of the mobile station 50 from the home agent apparatus 10 and constructs a firewall for the mobile station 50, using the configuration file. When the firewall device 20 receives an IP packet, it selects a firewall suitable for the mobile station 50 being a destination of the packet and determines the propriety of passage thereof according to a filtering condition set in this firewall.

Abstract: A communication equipment comprises a reception/transmission unit configured to notify a target equipment of a plurality of addresses provided for the communication equipment, acquire a plurality of target equipment addresses provided for the target equipment, from the target equipment, and perform packet reception/transmission using a plurality of provided addresses and a plurality of acquired target equipment addresses; and a controller configured to select the target equipment address to be used by the reception/transmission unit, and control the reception/transmission unit to perform the packet reception/transmission using a selected target equipment address.

Abstract: A communication system (1) is provided with URs (20a to 20h) and a source terminal (10). The URs (20a to 20h) include: entry holders (21a to 21h) for holding forwarding addresses; message processors (25) for registering the addresses of other URs, the addresses being associated with a source terminal address and a multicast group address, in the entry holders (21a to 21h) as the forwarding addresses; message providers (26) for providing the source terminal address with join request messages which request the addition of the addresses of the URs to sending addresses. The source terminal (10) includes: an entry holder (11) for holding a sending address; and a message processor 14 for registering the addresses of the URs (20a to 20h) in the entry holder 11 as sending addresses based on the join request messages.

Abstract: A router apparatus used in an IPv6 multihome network and capable of exchanging a network prefix as route information with an adjacent router is disclosed. The router apparatus comprises a pair information generator (52) configured to associate a prefix assigned from the network with a default route to generate a pair information item, and a routing protocol processor (51) configured to distribute the pair information item of the prefix and the associated default route to the adjacent router using a routing protocol.

Abstract: A communication control system 1 according to the present invention is provided with a home agent apparatus 10, a plurality of firewall devices 20-40, and a mobile station 50. When the mobile station 50 is connected, for example, to the firewall device 20, the firewall device 20 receives identification information and a configuration file of the mobile station 50 from the home agent apparatus 10 and constructs a firewall for the mobile station 50, using the configuration file. When the firewall device 20 receives an IP packet, it selects a firewall suitable for the mobile station 50 being a destination of the packet and determines the propriety of passage thereof according to a filtering condition set in this firewall.

Abstract: A communication equipment comprises a reception/transmission unit configured to notify a target equipment of a plurality of addresses provided for the communication equipment, acquire a plurality of target equipment addresses provided for the target equipment, from the target equipment, and perform packet reception/transmission using a plurality of provided addresses and a plurality of acquired target equipment addresses; and a controller configured to select the target equipment address to be used by the reception/transmission unit, and control the reception/transmission unit to perform the packet reception/transmission using a selected target equipment address.

Abstract: A mobile communications system including a voice message function in both a communications network (10) and a mobile station (20). If the mobile station (20) does not respond, the communications network responds instead thereof, stores a message, and notifies the mobile station of the presence of the message. The mobile station requests the transfer of the message when accessible. The message can be positively sent to a mobile station even if it is not accessible for a long time.

Abstract: A mobile communications system including a plurality of communications networks, each of which has one location register (a home location register or gate location register) and one or more visitor registers. Each of the visitor registers is located in each one of visiting areas for storing information about a communication terminal. The location register stores the number of the visitor register of the visiting area in which the communication terminal is present, and the information about the communication terminal. When the communication terminal moves between the communications networks, the information about the communication terminal is transferred between the location registers. When the communication terminal moves between the visiting areas in the same communications network, the information about the communication terminal is provided from the location register to the visitor register.