Abstract: This invention relates to an IP processor, and more particularly, provides an IP processor that reduces network load when a plurality of IP processors connected to ATM switches are used in edge portion of an IP network. The IP processor is comprised of a line interface unit for interfacing with an ATM switch, an IP packet buffer unit for temporarily storing an IP packet from the line interface unit, and sending out the IP packet after address resolution to the line interface unit, and an IP address resolution unit that responds to address resolution request from the IP packet buffer unit and returns the destination address information after address resolution, wherein the IP packet buffer unit sends out, when destination address information cannot be retrieved from the IP address resolution unit, the temporarily stored IP packet to a transfer route for direct transfer between IP processors.

Abstract: When a terminal enters a cell of a personal-use base station (NBTS) arranged in a certain location area, the terminal receives a location area identifier having a number that is different from an identifier of the location area, and transmits a location updating request with the reception of the location area identifier as a trigger. On receiving the location updating request, a VLR or an NRNC having a registration table, in which the ID of the personal-use base station and the ID of a terminal allowed to use the personal-use base station are registered, judges whether the terminal issued the location updating request is the terminal allowed to use the personal-use base station by referring to the registration table.

Abstract: A buffer control device for controlling a buffer memory includes a comparing unit which compares input data with one or more data patterns, a control unit which stores a code which indicates a data pattern among data patterns into said buffer memory if the input data matches with the data pattern, and a recovering unit which recovers the input data from the code.

Abstract: The present invention provides a packet transfer system for use in an ATM network, which can realize a high-speed packet transfer by implementing a packet transfer process by hardware and also can enhance the throughput of the packet transfer process implemented by software.

Abstract: A packet buffer device and a packet assembling method in a packet transfer module to assemble logical channel-multiplexed asynchronous transfer mode (ATM) cells into packets and to store and output the cells in packet units. The packet buffer device includes a discrete buffer controller to generate a discrete buffer from a common buffer, a buffer type determination unit to determine a buffer type in which to store an ATM cell for each input ATM cell, and a packet buffer controller to assign the ATM cell to the common buffer or to the discrete buffer according to the buffer type. Thus, a common buffer and discrete buffers are dynamically constructed and buffers of respectively differing type can be used for packets of differing service mode. Further, optimal buffer resource usage can be achieved by using the buffer capacity of both a common buffer type and a discrete buffer type to store packets.

Abstract: A communication unit which transmits packets in the form of ATM cells, includes a packet buffer part receiving Virtual Channel (VC)-multiplexed ATM cells from an input line, judging a packet type, converting a header and assembling a packet, a protocol processing part receiving and processing a protocol packet output from the packet buffer part when the packet type of the packet assembled in the packet buffer part is the protocol packet which is used for communication control, and a packet output scheduling part, including a scheduler which carries out an arbitration when an output request generated upon completion of a reception of a user packet from the packet buffer part and an output request generated upon ending of a process from the protocol processing part are received, and selects and outputs to an output line the user packet or the protocol packet based on the arbitration.

Abstract: A system according to this invention executes congestion control for monitoring a packet flow which passes through a relay router in a VoIP network and in which a packet is transferred with a predetermined priority, and for, when congestion is generated by generation of a new packet flow, maintaining a transfer state of a packet of a packet flow established before the new packet flow is generated and transferred with the predetermined priority.

Abstract: In a gateway apparatus which interconnects a first network and a second network, an encoding processing unit receives voice data from the first network and generates encoded voice data from the received voice data. A packet processing unit creates packets of the encoded voice data and transmits the packets to the second network. A network-state estimation unit determines network-state information of the second network. A determination unit controls at least one of the encoding of the encoding processing unit and the packetizing of the packet processing unit based on the network-state information determined by the network-state estimation unit.

Abstract: A buffer control device for controlling a buffer memory includes a comparing unit which compares input data with one or more data patterns, a control unit which stores a code which indicates a data pattern among data patterns into said buffer memory if the input data matches with the data pattern, and a recovering unit which recovers the input data from the code.

Abstract: This invention relates to an IP processor, and more particularly, provides an IP processor that reduces network load when a plurality of IP processors connected to ATM switches are used in edge portion of an IP network. The IP processor is comprised of a line interface unit for interfacing with an ATM switch, an IP packet buffer unit for temporarily storing an IP packet from the line interface unit, and sending out the IP packet after address resolution to the line interface unit, and an IP address resolution unit that responds to address resolution request from the IP packet buffer unit and returns the destination address information after address resolution, wherein the IP packet buffer unit sends out, when destination address information cannot be retrieved from the IP address resolution unit, the temporarily stored IP packet to a transfer route for direct transfer between IP processors.

Abstract: The present invention provides a packet transfer system for use in an ATM network, which can realize a high-speed packet transfer by implementing a packet transfer process by hardware and also can enhance the throughput of the packet transfer process implemented by software.

Abstract: A novel reactive monoazo dye, which can give to cellulose fiber materials a deep orange to scarlet color superior in build-up property and chlorine fastness, represented by a free acid of the formula, ##STR1## wherein D is a phenyl group substituted with 1 to 3 substitutes selected from methyl, ethyl, methoxy, ethoxy, halogen, acetylamino, propionylamino, benzoylamino, succinylamino, maleinylamino, nitro, suflonic acid and carboxyl groups; R.sub.1 is a hydrogen atom, or a methyl or ethyl group; R.sub.2 is an alkyl group having 1 to 4 carbon atoms which is unsubstituted or substituted with a hydroxy, cyano, alkoxy, halogen, carboxy, alkoxycarbonyl or sulfonic acid group; Z is a hydrogen atom or a sulfonic acid group; A is a phenylene residue which is unsubstituted or substituted with 1 or 2 substituents selected from methyl, ethyl, methoxy, ethoxy, chlorine, bromine and sulfonic acid groups; or a naphthylene residue which is unsubstituted or substituted with one sulfonic acid group; and X is --SO.sub.2 CH.dbd.

Abstract: A reactive metal formazan blue dye represented by a free acid of the formula, ##STR1## wherein A.sub.1 and A.sub.2 are independently a substituted or unsubstituted phenylene or naphthylene group, B is a straight or branched alkyl or alkenyl group, a phenyl group, a naphthyl group or a heterocyclic group, the alkyl, alkenyl, phenyl, napthyl and heterocyclic group being substituted or unsubstituted, Me is an ion of metal identified by an atomic number of 27 to 29, X is --O-- or ##STR2## Y is a halogen atom, Z is a group capable of imparting water solubility, each of l, m and n is 0 or an integer of 1 to 3, provided that the sum of l, m and n is from 1 to 4, D is a substituted or unsubstituted phenylene or naphthylene group, R is a substituted or unsubstituted lower alkyl group, and Q is --SO.sub.2 CH.dbd.CH.sub.2 or --SO.sub.2 CH.sub.2 CH.sub.

Abstract: Improvement in a process for producing an arylazo-aminonaphtholsulfonic acid represented by a free acid of the formula, ##STR1## wherein A is a phenyl or naphthyl group unsubstituted or substituted by one to four members selected from alkyl, alkoxy, phenoxy, sulfonic acid, carboxylic acid, arylamino, amino, nitro and hydroxyl groups and halogen atoms, and m is 0 or 1, which comprises reacting an aminonaphtholsulfonic acid represented by a free acid of the formula, ##STR2## wherein m is as defined above, with a dibasic acid anhydride to obtain an acylaminonaphtholsulfonic acid, coupling a diazonium compound of amine of the formula,A'--NH.sub.

Abstract: A novel reactive monoazo dye, capable of giving cellulose fiber materials a deep orange to scarlet color and superior in build-up and chlorine fastness properties, represented by a free acid of the formula, ##STR1## wherein R.sub.1 is hydrogen, methyl or ethyl; R.sub.2 is an alkyl having 1 to 4 carbons that is either unsubstituted or substituted with hydroxy, cyano, alkoxy, halogen, carboxy, alkoxycarbonyl or sulfonic acid; Z is hydrogen or sulfonic acid; A is phenylene and is either unsubstituted or substituted with 1 or 2 substituents selected from the group consisting of methyl, ethyl, methoxy, ethoxy, chlorine, bromine and sulfonic acid, or natphthylene that is either unsubstituted or substituted with sulfonic acid; X is --SO.sub.2 CH.dbd.CH.sub.2 or --SO.sub.2 CH.sub.2 CH.sub.2 Y in which Y is a group that is splittable by alkalis; and m is an integer of 1 to 3.

Abstract: A formazan reactive blue dye represented by a free acid of the formula, ##STR1## wherein X.sub.1 and X.sub.2 are each a hydrogen atom, a methyl, methoxy or sulfonic acid group, m and l are each an integer of 0 or 1 and n is an integer of 0 to 2, provided that the sum of m, n and l is 2 or 3. This dye is usable for dyeing cellulose fibers in a brilliant blue color with good fastness, particularly, against chlorine, light and perspiration-light, as well as good white dischargeability.

Abstract: A red reactive dye represented by a free acid of the formula, ##STR1## wherein X is a hydrogen atom, a methyl, methoxy or sulfonic acid group, Y is --CH.dbd.CH.sub.2, --CH.sub.2 CH.sub.2 Y.sub.1 or --CH.sub.2 CH.sub.2 OY.sub.2 (in which Y.sub.1 is a halogen atom, and Y.sub.2 is the residue of polybasic acids), R is a C.sub.1 -C.sub.4 alkyl group, R.sub.1 and R.sub.2 are each a hydrogen atom, a methyl or ethyl group, and the azo group is located on a meta-or para-position of the benzene ring A with respect to the --NR.sub.2 -- group and the sulfonic acid group on the benzene ring A is adjacent to the azo group. This dye is suitable for dyeingcellulose fibers red to afford dyeings superior in fastnesses, acid stability, build-up property, level dyeing property and white dischargeability.

Abstract: A brown reactive dye represented by a free acid of the formula, ##STR1## wherein R is a hydrogen atom or a C.sub.1 to C.sub.4 alkyl group, X is --SO.sub.2 CH.sub.2 CH.sub.2 Cl, --SO.sub.2 CH.dbd.CH.sub.2, --SO.sub.2 CH.sub.2 CH.sub.2 OSO.sub.3 H or --SO.sub.2 CH.sub.2 CH.sub.2 OPO.sub.3 H.sub.2, rings A, B and C are each a benzene or naphthalene ring which may have other substituent, m is 0 to 3 and n is 0 to 1.This dye is suitable for dyeing cellulose fibers brown to afford dyeings superior in fastnesses, acid stability, build-up property and level dyeing property.

Abstract: A monoazo compound represented by a free acid of the formula: ##STR1## wherein R.sub.1 and R.sub.2 independently represent a hydrogen atom, or an alkyl, aralkyl or cyclohexyl group; R.sub.3 represents a hydrogen atom or a methyl or sulfonic acid group; R.sub.4 represents a hydrogen atom or an alkyl group; A represents an oxygen atom or --NH--; X.sub.1 and X.sub.2 independently represent a hydrogen or chlorine atom, or a methyl, methoxy, carboxyl or sulfonic acid group; and Y represents --CH.dbd.CH.sub.2 or --CH.sub.2 CH.sub.2 Z in which Z represents a halogen atom, --OSO.sub.3 H or --OPO.sub.3 H.sub.2. This compound is used for dyeing cellulose fibers to give dyed products of yellow to reddish yellow having excellent fastnesses, particularly chlorine fastness.

Abstract: A compound represented by a free acid of the formula: ##STR1## wherein D is ##STR2## (R.sub.1 and R.sub.2 independently represent hydrogen, methyl or methoxy) or ##STR3## (n is 0 or 1, the mark * signifies the position of linkage to --N.dbd.N-- and the mark # signifies the position of linkage to Q mentioned below); Q is --SO.sub.2 CH.dbd.CH.sub.2 or --SO.sub.2 CH.sub.2 CH.sub.2 R (R is a group capable of being split off by the action of alkali); one of X.sub.1 and X.sub.2 is hydrogen and the other is a sulfonic acid group; and m is 0 or 1, which is useful for dyeing cellulose fibers a blue-black color with good dyeability and excellent fastnesses, particularly chlorine fastness.