Ntt Docomo, Inc.

So Ishida

Kenji Ishii

Toshihiro Suzuki

Ken Igarashi

Harunobu Fukazawa

Hideki Kitahama

A communication control systemaccording to the present invention is provided with a home agent apparatus, a plurality of firewall devices-, and a mobile station. When the mobile stationis connected, for example, to the firewall device, the firewall devicereceives identification information and a configuration file of the mobile stationfrom the home agent apparatusand constructs a firewall for the mobile station, using the configuration file. When the firewall devicereceives an IP packet, it selects a firewall suitable for the mobile stationbeing a destination of the packet and determines the propriety of passage thereof according to a filtering condition set in this firewall.

Communication control apparatus, firewall apparatus, and data communication method

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 () configured to associate a prefix assigned from the network with a default route to generate a pair information item, and a routing protocol processor () configured to distribute the pair information item of the prefix and the associated default route to the adjacent router using a routing protocol.

Router apparatus, route information distributing method, and communications system

A communication system () is provided with URs (to) and a source terminal (). The URs (to) include: entry holders (to) for holding forwarding addresses; message processors () 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 (to) as the forwarding addresses; message providers () 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 () includes: an entry holder () for holding a sending address; and a message processorfor registering the addresses of the URs (to) in the entry holderas sending addresses based on the join request messages.

Communication system, multicast-capable router, transmitter terminal, receiver terminal, and communication method

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.

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Yokosuka, Japan

So Ishida