Abstract: Data from an STM (Synchronous Transfer Mode) network is converted into an ATM (Asynchronous Transfer Mode) cell by an interworking facility, and the ATM cell is input to the ATM network. If the input cell corresponds to a connection which requires voice processing, a voice processing trunk within a switch performs the processes such as an echo compensation process, an encoding process, a multiplexing process, etc. The switch outputs the cell to a trunk line of the ATM network.

Abstract: An address translation device comprising extraction unit for extracting, from data received via a first network, a fixed identifier indicating a transmission source of the data, storage unit for storing the fixed identifier and an address, in a second network, of the transmission source indicated by this fixed identifier by relating the fixed identifier and the address each other, reading unit for reading the address, in the second network, stored on the storage unit related to the fixed identifier extracted by the extraction unit, and replacing unit for replacing the address in the second network read by the reading unit with the source address of the data.

Abstract: An ATM switching apparatus applicable to a short cell including an ATM-SW outputting a cell from an output path corresponding to a cell identifier, an interface unit, a demultiplexer, and a multiplexer. The interface unit sets, when a cell storing a plurality of short cells is inputted, the cell identifier so that the cell is transmitted from ATM-SW to the demultiplexer, and outputs the cell toward the ATM-SW. The demultiplexer receives the cell and produces a plurality of partial fill cells, and outputs them, while setting an identifier of each partial fill cell, the partial fill cell is outputted. The multiplexer receives a plurality of the partial fill cells, produces a cell storing a plurality of the short cells in accordance with the identifiers and outputs the cell to the ATM-SW.

Abstract: The present invention concerns a mobile packet communication system that supports data communications, including Internet communications, in a high-speed mobile communication system such as a cellular communication network, and integrates a mobile network and a fixed network on a common platform while providing the capability to select an optimum route.

Abstract: An old care-of address is assigned to a mobile node in the communication area of the old access router and the mobile node is communicating with a correspondent node. Immediately before the mobile node enters the communication area of a new access router, a binding update message is transmitted to a diverging point router. The diverging point router is a router device located in the node where a route from the correspondent node to the old access router and a route from the correspondent router to the new access router are diverged. The diverging point router transfers packets addressed to the old care-of address to the new care-of address assigned to the mobile node in the communication area of the new access router.

Abstract: The present invention concerns a mobile packet communication system that supports data communications, including Internet communications, in a high-speed mobile communication system such as a cellular communication network, and integrates a mobile network and a fixed network on a common platform while providing the capability to select an optimum route.

Abstract: In a home agent for designating a transmission period of a binding update packet transmitted from a mobile node, a central processing monitor detects a usage rate of a CPU for processing accompanied by a reception of a binding update packet from the mobile node or a binding renewal message among the binding update packets, a line usage rate monitor detects a line usage rate of a receiving interface accompanied by the processing or a transmitting interface, a BC number monitor detects a binding cache number, and a calculator calculates a transmission period of the binding renewal message of the mobile node based on the thus detected CPU usage rate, line usage rate, binding cache number, and a priority table of the mobile node.

Abstract: In a load balancer preserving a function of server consistency maintenance during communications even if a terminal is a mobile terminal, identifying information specific to a mobile IP terminal is extracted from an arrival packet, and a destination server to be connected is determined based on the identifying information. Also, a home agent or a terminal is requested to notify a change of the care-of address when the care-of address of the terminal has changed, and a destination server to be connected is determined by regarding the notified care-of address as identifying information.

Abstract: A gate node reports current position information of a mobile terminal managed by the gate node itself to a communicating edge node which routes a packet destined for the mobile terminal to the gate node. The communicating edge node carries out routing of the packet destined for the mobile terminal to a resident edge node based on the reported cache information in place of the gate node. This achieves high-speed handover and route optimization free from a limitation to a packet transfer route in a packet communication system.

Abstract: A short cell multiplexer includes a sequence designating unit, in which reading intervals corresponding to QOS classes are set in respective reading interval setting registers. A counter memory is stored with the number of timings at which the short cells can be read. The sequence designating unit specifies the QOS class in which the number of timings reaches the reading interval on the basis of the reading interval and the number of timings, and gives to a reading unit an indication of reading the short cell belonging to this class.

Abstract: In a mobile node supporting router connected to a network on which a Mobile IPv4/v6 operates, an encapsulating cache stores binding information of a mobile node, and a processor encapsulates a packet addressed to the mobile node with a care-of address included in the binding information at a foreign link interface. Also, the processor receives a binding demand packet from the mobile node, and stores the binding information included in the binding demand packet in the encapsulating cache. Furthermore, the processor of the foreign link interface exchanges mobile IP messages instead of a home agent of the mobile node, and the cache stores the binding information of the mobile node included in the message.

Abstract: An ATM switching apparatus applicable to a short cell including an ATM-SW outputting a cell from an output path corresponding to a cell identifier, an interface unit, a demultiplexer, and a multiplexer. The interface unit sets, when a cell storing a plurality of short cells is inputted, the cell identifier so that the cell is transmitted from ATM-SW to the demultiplexer, and outputs the cell toward the ATM-SW. The demultiplexer receives the cell and produces a plurality of partial fill cells, and outputs them, while setting an identifier of each partial fill cell, the partial fill cell is outputted. The multiplexer receives a plurality of the partial fill cells, produces a cell storing a plurality of the short cells in accordance with the identifiers and outputs the cell to the ATM-SW.

Abstract: A first header converting section outputs, when partial fill cells are inputted to the first header converting section the partial fill cells, while converting a VPI of each of the partial fill cells into a value that is a unit of a multiplexing process at a short cell multiplexing section and converting a VCI of each of the partial fill cells into a value to be a CID which is to be stored in a short cell at the short cell multiplexing section. The short cell multiplexing section receives a plurality of the partial fill cells from the first header converting section to multiplex a plurality of the short cells within the partial fill cells for every VPI of the partial fill cells, and produces an AAL Type 2 cell in which the VCIs of the partial fill cells are stored as CIDs and the VPIs of the partial fill cells are stored as VCIs.

Abstract: An ATM switching apparatus applicable to a short cell comprises an ATM-SW outputting a cell from an output path corresponding to a identifier of the cell, an interface unit, a demultiplexer, and a multiplexer connected to the ATM-SW. The interface unit sets, when a cell storing a plurality of short cells are inputted, the identifier of the cell so that the cell is transmitted from ATM-SW to the demultiplexer, and outputts the cell toward the ATM-SW. The demultiplexer receives the cell outputted from the interface unit through the ATM-SW, produces a plurality of partial fill cells, and outputs the partial fill cells, while setting an identifier of each partial fill cell so that the partial fill is outputted to the multiplexer. The multiplexier receives a plurality of the partial fill cells outputted from the demultiplexer through the ATM-SW, produces a cell storing a plurality of the short cells in accordance with the identifiers of the partial fill cells, and outputs the cell to the ATM-SW.

Abstract: A short cell multiplexer includes a sequence designating unit, in which reading intervals corresponding to QOS classes are set in respective reading interval setting registers. A counter memory is stored with the number of timings at which the short cells can be read. The sequence designating unit specifies the QOS class in which the number of timings reaches the reading interval on the basis of the reading interval and the number of timings, and gives to a reading unit an indication of reading the short cell belonging to this class.

Abstract: The object of the present invention is accomodating local connectionless information (data that is immediately transferred without establishing a path to a receive side), such as LAN data in a local area network, by an asynchronous transfer mode (ATM) network using a connection-oriented communication system (which makes data transfers after verifying that a path to the receive side has been established), thereby performing efficient, fast routing of connectionless information.

Abstract: A mobile node adapted router and home agent router operating by the IPv6 protocol able to shorten the time required for updating the current address of the mobile node and increase the speed of switching of the transfer route and providing a transfer route not passing through a home agent every time for a node not supporting this protocol, provided with a memory unit for storing a current address of a mobile node which the correspondent node should store instead of the correspondent node and a transfer unit for referring to the memory unit when receiving a packet transmitted to the home address of the mobile node, converting it to the current address, and transmitting the packet.

Abstract: The quality classes of arriving short cells and the ATM virtual connections to be multiplexed are identified based on the CIDs of those short cells. Those short cells are written into FIFO memories corresponding to the ATM virtual connections and quality classes. A VC specification control section specifies one ATM virtual connection for each ATM cell sending timing. At this time, a sequence specification control section specifies one or more quality classes in sequence. A readout control section reads one or more short cells out from the FIFO memory in accordance with the specified ATM virtual connection and quality class, stores them in one ATM cell and sends the ATM cell to the ATM virtual connection specified by the VC specification control section.

Abstract: A cell assembly and multiplexing device includes short cell assembly parts which store input information received via respective input lines and add short cell headers to the input information so that short cells having the short cell headers are assembled, and a multiplexing part which arranges the short cells in given fields of standard cells having a given standard format and a fixed cell length and outputs the standard cells having the short cells to a transmission line.

Abstract: A storage unit includes an alarm state/timer table, an alarm state table, an alarm state OR-representation table, an alarm state change OR-representation table, an alarm state latch circuit, and a statistical information memory. A collection unit extracts the identifier and data from a cell that passes through a switching unit. An update unit updates associated data in the storage unit. A readout unit reads the updated data and sends it to a call processing processor. An address generation section selectively generates the address for data needing to be updated. An adjustment section forces the readout unit to wait until a cell slot arrives in which no data is updated.