Abstract: The routing control system 100 according to the present invention comprises a control server 1 as the control system, and routers 10-60 as the transfer system. The control server 1 receives the temporary routing control table which is transmitted from the routers 10-60, and stores this temporary routing control table in the routing control table DB 6 as the routing control table of the router which is the transmission source. This routing control table is updated as needed when a predetermined time has elapsed from the previous update. The control server 1 refers to the data in the routing control table DB 6 constructed in this way, and performs the routing control of packets which pass through each router 10-60 on the network.

Abstract: The problems of an additional load to an AR having the function of transferring a packet, a BR functioning as a border relay device, and an address management server, a packet loss due to an unnecessary inquiry to the management server, an increasing delay of a packet transfer, etc. can be reduced. According to the address identification information for identification of the type of an address, routers determine to which type the address assigned to a given packet belongs, a terminal identification address for identification of a source terminal and a destination terminal, a packet transfer address for transfer of the packet to another router, or an address requiring no address conversion. Thus, an address conversion network connected to an external IP network can be realized, an increased load by an inquiry about an erroneous address, etc. and a packet loss and delay due to an unnecessary inquiry can be reduced.

Abstract: A mobile communication control method includes: converting a first address of a destination mobile terminal which is included in a packet as a destination address, to a second address of the destination mobile terminal which is associated with the first address of the destination mobile terminal, in a source router; and converting the second address of the destination mobile terminal which is included in the received packet as a destination address, to the first address of the destination mobile terminal which is associated with the second address of the destination mobile terminal, in a destination router.

Abstract: Determining a cross over router on the occasion of a migration of a mobile terminal connected to a network during communication in the network. A path control device receives path control information from each router in the network and stores the information as a path control table. Then, a pre-migration path between the mobile terminal and the correspondent terminal is recognized and, on the occasion of a migration of a mobile terminal, the path control device predicts a post-migration path between the mobile terminal and the correspondent terminal. The path control device then compares the pre-migration path and the post-migration path to derive as a common part, and a router closest to the mobile terminal in the common part is determined as a cross over router.

Abstract: A router includes a clock configured to be synchronous to a transmission terminal that transmits a data packet; a comparator configured to compare a delay time of the data packet with an acceptable delay time of the data packet based on the time obtained from the clock; and a packet processing unit configured to either transfer or discard the data packet based on the comparison result of the comparator.

Abstract: A relay device acquires and stores address binding information indicating correspondence between a static communication address and a dynamic communication address of a mobile terminal which is linked to the relay device. The relay device also stores address binding information of other mobile terminals to which packets are sent from the source terminal. A management server stores the address binding information pertaining to the source terminal, and also stores the communication status information of the other mobile terminals with which the terminal is communicating. When the terminal terminates communication, the relay device and the server delete the address binding information pertaining to the source terminal by cooperating with each other.

Abstract: The packet switching system for transmitting and receiving a packet via a packet switching network 100, which comprises a plurality of routing tables (#0, #1, #2 . . . ), each of which has been generated by a unique routing policy, stored in the routing apparatuses deployed at the border, at the origin or at the end of the respective routing domains, an identifier (RTI) inserted in the packet to specify the routing tables, and an identifier changer to change a value of the identifier on the packet switching network 100. The routing apparatus selects one of the routing tables (#0, #1, #2 . . . ) according to the RTI in the received packet and transfers the packet to a destination that is specified by the selected routing table.

Abstract: A communications system which allows data transfer not using a terminal ID assigned by an access network but using routing information distinct from the terminal ID is provided. The communications system transmits data including, as a destination address, a second terminal ID, from a first terminal to the second terminal via a plurality of transfer devices. A first transfer device includes a first memory for storing the second terminal ID and routing information for routing the data to a second transfer device, associating them with one another, and a routing processor for adding to the data the routing information for routing the data to the second transfer device associated with the second terminal ID included in the data, and transferring the data to the second transfer device.

Abstract: A method allows a mobile router that uses the Mobile Internet Protocol version 6 (Mobile IPv6) for mobility management to optimize routing by securely sending binding update messages directly to correspondent nodes on behalf of each mobile network node, even if the node does not perform Mobile IPv6 functions. Since the network address for each mobile network node is generated from the public keys of both the mobile network node and the mobile router, the mobile router is authorized to use the generated address on behalf of the mobile network node. If the mobile router changes its point of attachment, it sends signed binding update messages to the correspondent nodes of the mobile network nodes. When the correspondent nodes verify the binding update message and the correct public keys, the correspondent nodes can communicate with the mobile network node without going through the home agent. Therefore, secure proxy binding update messages can be sent from the mobile router.

Abstract: A data communications system which communicates data via a data communications network, includes: an information extraction unit configured to extract an extraction target from received data; an comparison information generator/transmitter unit configured to generate and transmit comparison information including the extraction target extracted by the information extraction unit; a comparison unit configured to compare the received comparison information with the received data; and a cancellation processor unit configured to delete the received data, when the received comparison information agrees with the received data.

Abstract: The problems of an additional load to an AR having the function of transferring a packet, a BR functioning as a border relay device, and an address management server, a packet loss due to an unnecessary inquiry to the management server, an increasing delay of a packet transfer, etc. can be reduced. According to the address identification information for identification of the type of an address, routers determine to which type the address assigned to a given packet belongs, a terminal identification address for identification of a source terminal and a destination terminal, a packet transfer address for transfer of the packet to another router, or an address requiring no address conversion. Thus, an address conversion network connected to an external IP network can be realized, an increased load by an inquiry about an erroneous address, etc. and a packet loss and delay due to an unnecessary inquiry can be reduced.

Abstract: A relay device acquires and stores address binding information indicating correspondence between a static communication address and a dynamic communication address of a mobile terminal which is linked to the relay device. The relay device also stores address binding information of other mobile terminals to which packets are sent from the source terminal. A management server stores the address binding information pertaining to the source terminal, and also stores the communication status information of the other mobile terminals with which the terminal is communicating. When the terminal terminates communication, the relay device and the server delete the address binding information pertaining to the source terminal by cooperating with each other.

Abstract: The invention is aimed at determining a cross over router on the occasion of a migration of a mobile terminal connected to a network during communication in the network in which the transfer part and the control part are separated from each other. The path control device receives path control information from each router and stores the information as a path control table, thereby shares the path control information with the transfer part (S1). Thereupon a pre-migration path between the mobile terminal and the correspondent terminal is recognized (S2).

Abstract: An object of the present invention is to provide a routing control device and method of generating routing control information whereby the function of connected transfer devices can be more simplified and more efficient, and routing information can be grasped appropriately. A communication system includes a plurality of transfer devices R1-R6 and a routing control device. Each of the transfer devices R1-R6 is physically connected with the routing control device and transmits the topology information (link information and metric information) possessed individually to the routing control device. The routing control device has a routing control information generating unit that generates routing control information collectively based on routing information such as the topology information transmitted from the transfer devices R1-R6. The routing control information generating unit generates a routing control table for all of the transfer devices that transmitted routing information thereto.

Abstract: The routing control system 100 according to the present invention comprises a control server 1 as the control system, and routers 10-60 as the transfer system. The control server 1 receives the temporary routing control table which is transmitted from the routers 10-60, and stores this temporary routing control table in the routing control table DB 6 as the routing control table of the router which is the transmission source. This routing control table is updated as needed when a predetermined time has elapsed from the previous update. The control server 1 refers to the data in the routing control table DB 6 constructed in this way, and performs the routing control of packets which pass through each router 10-60 on the network.

Abstract: The object of the present invention is provide a communication control system which can realize a dynamic routing control in units of flows without changing the conventional routing protocol. The routing controller 30 comprises an address information provision requester 35 configured to request the first router 10F to provide address conversion information in accordance with the received predetermined trigger and an address conversion information processing requester 35 configured to request the second router 10A to perform a predetermined processing related to the address conversion information acquired from the first router 10F.

Abstract: An object of the present invention is to provide routing control system, routing control device, transfer device and routing control method, whereby the function of transfer devices can be more simplified and more efficient, and the transfer routes of packets can be grasped and designated appropriately. The communication system includes a plurality of transfer devices R1-R6 and a routing control device. The routing control device has a routing control table and transmits, as routing control information, information regarding the initial transfer device and cost contained in a corresponding entry of the routing control table, to a transfer device which requests transmission of routing control information. The routing control information is transmitted thereto from the routing control device, thereby each of the transfer devices R1-R6 can execute packet routing processing based on the routing control information.

Abstract: The object of the present invention is to provide a radio communication system which can avoid communication route redundancy, and prevent the current location information of a source mobile terminal and the IP address of a location information management server from being revealed. The present invention comprises the steps of: converting a first address of a destination mobile terminal 2 which is included in a packet as a destination address, to a second address of the destination mobile terminal 2 which is associated with the first address of the destination mobile terminal 2, in a source router AR2; and converting the second address of the destination mobile terminal 2 which is included in the received packet as a destination address, to the first address of the destination mobile terminal 2 which is associated with the second address of the destination mobile terminal2, in a destination router AR3.

Abstract: A communications system which allows data transfer not using a terminal ID assigned by an access network but using routing information distinct from the terminal ID is provided. The communications system transmits data including, as a destination address, a second terminal ID, from a first terminal to the second terminal via a plurality of transfer devices. A first transfer device includes a first memory for storing the second terminal ID and routing information for routing the data to a second transfer device, associating them with one another, and a routing processor for adding to the data the routing information for routing the data to the second transfer device associated with the second terminal ID included in the data, and transferring the data to the second transfer device.

Abstract: The packet switching system for transmitting and receiving a packet via a packet switching network 100, which comprises a plurality of routing tables (#0, #1, #2 . . . ), each of which has been generated by a unique routing policy, stored in the routing apparatuses deployed at the border, at the origin or at the end of the respective routing domains, an identifier (RTI) inserted in the packet to specify the routing tables, and an identifier changer to change a value of the identifier on the packet switching network 100. The routing apparatus selects one of the routing tables (#0, #1, #2 . . . ) according to the RTI in the received packet and transfers the packet to a destination that is specified by the selected routing table.