Abstract: In a packet communication network comprising an MNO network, and an MVNO network including an application server for providing an information service to wireless terminals via the MNO network, the MNO network includes a subscriber-associated-information delivery controller for delivering subscriber associated information of each wireless terminal, which is connected to a radio access network, to the MVNO network, and the MVNO network includes a subscriber-associated-information processor for receiving the subscriber associated information delivered from the subscriber-associated-information delivery controller.

Abstract: A content relay node comprising a data processing unit for storing or transmitting a data packet on the basis of the data attribute, a storage connected to the data processing unit, transmitting units each for processing the header of a data packet in accordance with a control signal from the data processing unit and transferring the data packet to a neighboring relay node, and a routing control unit for selecting the transmitting unit or the data processing unit as a destination of a data packet on the basis of routing information including a storage address, wherein the storage unit stores a copy of a data packet at least until transfer of the data packet to the next node is completed.

Abstract: An optical access network and optical switching systems requiring no frame delay process on an optical switchboard are disclosed. Plural ONUs are connected to user terminals. An OLT communicates with an IP network through an access gateway. An optical switching unit (OSW) connects the ONUs and the OLT by switching the optical line. A control line connects the OLT and the OSW to control the optical switch change-over operation in the OSW. The optical switch port information required to generate the optical switch activation signal are concentrated in the OLT, which transmits the optical switch change-over control signal to the OSW through the control line before the transmission frame.

Abstract: In a packet communication network comprising an MNO network, and an MVNO network including an application server for providing an information service to wireless terminals via the MNO network, the MNO network includes a subscriber-associated-information delivery controller for delivering subscriber associated information of each wireless terminal, which is connected to a radio access network, to the MVNO network, and the MVNO network includes a subscriber-associated-information processor for receiving the subscriber associated information delivered from the subscriber-associated-information delivery controller.

Abstract: There is provided a computer system comprising a first network and a plurality of second networks. The first network includes an access point, a first communication device, a DHCP server and a first authentication server. Each of the plurality of second networks includes a second terminal device. The first authentication server: identifies which second network is associated with this first terminal device upon reception of an access request from the first terminal device; and send, to the first communication device, access control information that is used to control communication of the second terminal device included in the identified second network. The first communication device controls communication of the first terminal device based on the access control information received from the first authentication server.

Abstract: A secure storage system for securely accessing a storage device on a network and improving volume management scalability, consisting of a client having a VPN capability; a storage device in an SAN; a management apparatus having a means for managing a storage capacity and a logical volume allocated to the storage device; a converter for converting a protocol used in the SAN to a protocol used in a LAN/MAN/WAN and vice versa; and a conversion apparatus having the VPN capability. A VPN is provided between the client and the conversion apparatus. The conversion apparatus is provided with a mapping between the VPN and an access range of the storage device. A VPN-ID is used for identifying the VPN. An address in the logical volume is used for the access range of the storage device.

Abstract: An ATM switching system includes PVC allocation circuits 13-i corresponding to output queues 14-i is disclosed. At the time of arrival of the leading cell of each burst data, if the output line has a room, the PVC of the burst data is stored as information for admission and identification. The subsequently-arriving cells having the same PVC identification information as the stored identification information are “input to an output buffer, and the cells of the remaining burst data are all discarded. Even when a plurality of burst data compete for the same output line, the fact that all the cells other than the first-arriving admitted burst data are discarded prevents the cells from being input other than within a predetermined bandwidth and localizes the burst data affected by the cell discarding due to output queue overflow.

Abstract: A content relay node comprising a data processing unit for storing or transmitting a data packet on the basis of the data attribute, a storage connected to the data processing unit, transmitting units each for processing the header of a data packet in accordance with a control signal from the data processing unit and transferring the data packet to a neighboring relay node, and a routing control unit for selecting the transmitting unit or the data processing unit as a destination of a data packet on the basis of routing information including a storage address, wherein the storage unit stores a copy of a data packet at least until transfer of the data packet to the next node is completed.

Abstract: A switching node (MGS) 1 connected to a relay network 5 has a table 37 prestoring bandwidth control parameter values in correspondence with the size of data transferred via the relay network. When a request for accessing a remote storage apparatus is received, the switching node obtains the bandwidth control parameter values adapted to the transfer data size indicated by the access request are obtained from the table 37, and automatically sets a path having an optimum bandwidth on the relay network by using the parameter values. The path is automatically released when the data transfer is finished.

Abstract: A request routing system for offering high-quality, low-priced data delivery services to a large number of users is disclosed. Request router RR1 for redirecting data requests to delivery servers manages the data storage in each delivery server, the MPU load on each delivery server, the delay time involved between delivery servers and terminals, and the bandwidths of data delivery paths between delivery servers and terminals. If a bandwidth required for data delivery cannot be acquired, request router RR1 can perform a calculation to check whether an alternative path can be set between a delivery server and terminal. If the result of the calculation indicates that an alternative path can be set, request router RR1 can explicitly set such a path.

Abstract: A secure storage system for securely accessing a storage device on a network and improving volume management scalability, consisting of a client having a VPN capability; a storage device in an SAN; a management apparatus having a means for managing a storage capacity and a logical volume allocated to the storage device; a converter for converting a protocol used in the SAN to a protocol used in a LAN/MAN/WAN and vice versa; and a conversion apparatus having the VPN capability. A VPN is provided between the client and the conversion apparatus. The conversion apparatus is provided with a mapping between the VPN and an access range of the storage device. A VPN-ID is used for identifying the VPN. An address in the logical volume is used for the access range of the storage device.

Abstract: An ATM switching system which includes PVC allocation circuits corresponding to output queues. At the time of arrival of the leading cell of each burst data, if the output line has room, the PVC of the burst data is stored as information for admission and identification. The subsequently-arriving cells, having the same PVC identification information as the stored identification information are input to an output buffer, and the cells of the remaining burst data are all discarded. Even when a plurality of burst data compete for the same output line, the fact that all the cells other than the first-arriving admitted burst data are discarded prevents the cells from being input other than within a predetermined bandwidth and localizes the burst data affected by the cell discarding due to output queue overflow.

Abstract: An ATM switching system includes PVC allocation circuits 13-i corresponding to output queues 14-i is disclosed. At the time of arrival of the leading cell of each burst data, if the output line has a room, the PVC of the burst data is stored as information for admission and identification. The subsequently-arriving cells having the same PVC identification information as the stored identification information are “input to an output buffer, and the cells of the remaining burst data are all discarded. Even when a plurality of burst data compete for the same output line, the fact that all the cells other than the first-arriving admitted burst data are discarded prevents the cells from being input other than within a predetermined bandwidth and localizes the burst data affected by the cell discarding due to output queue overflow.

Abstract: An ATM switching system includes PVC allocation circuits 13-i corresponding to output queues 14-i is disclosed. At the time of arrival of the leading cell of each burst data, if the output line has a room, the PVC of the burst data is stored as information for admission and identification. The subsequently-arriving cells having the same PVC identification information as the stored identification information are “input to an output buffer, and the cells of the remaining burst data are all discarded. Even when a plurality of burst data compete for the same output line, the fact that all the cells other than the first-arriving admitted burst data are discarded prevents the cells from being input other than within a predetermined bandwidth and localizes the burst data affected by the cell discarding due to output queue overflow.

Abstract: An ATM switching system which includes PVC allocation circuits corresponding to output queues. At the time of arrival of the leading cell of each burst data, if the output line has room, the PVC of the burst data is stored as information for admission and identification. The subsequently-arriving cells having the same PVC identification information as the stored identification information are input to an output buffer, and the cells of the remaining burst data are all discarded. Even when a plurality of burst data compete for the same output line, the fact that all the cells other than the first-arriving admitted burst data are discarded prevents the cells from being input other than within a predetermined bandwidth and localizes the burst data affected by the cell discarding due to output queue overflow.

Abstract: An ATM switching system which includes PVC allocation circuits corresponding to output queues. At the time of arrival of the leading cell of each burst data, if the output line has room, the PVC of the burst data is stored as information for admission and identification. The subsequently-arriving cells having the same PVC identification information as the stored identification information are input to an output buffer, and the cells of the remaining burst data are all discarded. Even when a plurality of burst data compete for the same output line, the fact that all the cells other than the first-arriving admitted burst data are discarded prevents the cells from being input other than within a predetermined bandwidth and localizes the burst data affected by the cell discarding due to output queue overflow.

Abstract: An ATM switching system which includes PVC allocation circuits corresponding to output queues. At the time of arrival of the leading cell of each burst data, if the output line has room, the PVC of the burst data is stored as information for admission and identification. The subsequently-arriving cells having the same PVC identification information as the stored identification information are input to an output buffer, and the cells of the remaining burst data are all discarded. Even when a plurality of burst data compete for the same output line, the fact that all the cells other than the first-arriving admitted burst data are discarded prevents the cells from being input other than within a predetermined bandwidth and localizes the burst data affected by the cell discarding due to output queue overflow.

Abstract: An asynchronous transfer mode switching system for improving switching throughput and averting complicated and difficult timing design. In operation, synchronous cell strings from external transmission lines are converted to asynchronous cell strings which are switched by a space-division switch array. The switched asynchronous cell strings are reconverted to synchronous cell strings for output onto external transmission lines. The space-division switch array comprises a plurality of unit switches in stages, each unit switch having input terminals and output terminals. The unit switches each include a timing control circuit that causes a switching operation to start upon detecting two states concurrently: a stored state of a cell to be switched, and a storage-ready state of a destination for the switched cell. The scheme allows the system to operate in an asynchronous manner.

Abstract: An ATM switching system which includes PVC allocation circuits corresponding to output queues. At the time of arrival of the leading cell of each burst data, if the output line has room, the PVC of the burst data is stored as information for admission and identification. The subsequently-arriving cells having the same PVC identification information as the stored identification information are input to an output buffer, and the cells of the remaining burst data are all discarded. Even when a plurality of burst data compete for the same output line, the fact that all the cells other than the first-arriving admitted burst data are discarded prevents the cells from being input other than within a predetermined bandwidth and localizes the burst data affected by the cell discarding due to output queue overflow.

Abstract: Apparatus for executing the connection admission control for PVC and SVC efficiently in an ATM network system which includes a network management equipment and a network equipment. The control function of the network management equipment executes resource allocation to PVC and SVC and notifies the network equipment of resource management information for SVC. For a request of PVC setup, the control function of the network management equipment executes the connection admission control for PVC and notifies the network equipment of the admission result. For a request of SVC setup, the network equipment executes the connection admission control for SVC. Communication overhead is reduced since it is not necessary to inquire the network equipment about connection admission from the network management equipment during PVC setup. Furthermore, the network equipment can count call blocking of SVC.