ATM switching system

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4956839
SERIAL NO

07382419

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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In the ATM switching system, an ATM speech path is divided into a plurality of functional blocks. A routing function for distributing cells (packets) each of a fixed length to addresses outgoing lines and a logical multiplexing function are imparted to a switch, while other functions associated with a line typified by a phase synchronizing function and a flow control function are incorporated en bloc in ATM line terminating units and functions capable of being processed by hardware in common to the lines are assembled in a line common unit. The ATM line terminating unit physically terminates transmission lines and performs the processing relevant to header information of the cells each of a fixed length (ATM terminating processing) and includes a cell phase synchronizing circuit for matching the temporal positions of the cells among the lines and a flow control circuit for avoiding overload exceeding the load declared by subscriber terminal. The line common unit serves for processings of call control signals and the calls and includes a signal processing circuit and a control circuit. The switch performs cell multiplexing and switching and is constituted by a self-routing switch.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
HITACHI, LTD.TOKYO13769

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Gohara, Shinobu Yokohama, JP 52 1264
Mori, Makoto Yokohama, JP 79 891
Ohtsuki, Kenichi Kanagawa, JP 28 477
Sakurai, Yoshito Yokohama, JP 42 1137
Torii, Yutaka Yokohama, JP 5 380

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ALCATEL N.V. (1)
* 4813037 Switching system 43 1987
 
NEC CORPORATION (1)
* 4799215 High-speed packet-switched communications system with end-to-end flow control and retransmission 89 1986
 
BELL COMMUNICATIONS RESEARCH, INC. (1)
* 4782478 Time division circuit switch 41 1987
 
Compagnie Industrielle des Telecommunications Cit-Alcatel (1)
* 4339815 Multiplex connection unit for use in a time-division exchange 5 1980
 
BELL TELEPHONE LABORATORIES, INCORPORATED (1)
* 4670871 Reliable synchronous inter-node communication in a self-routing network 58 1985
 
FUJITSU LIMITED (1)
* 4466095 Speech path control system 13 1981
* Cited By Examiner

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
ARRIS INTERNATIONAL, INC. (2)
* 5425027 Wide area fiber and TV cable fast packet cell network 161 1993
* 5870395 Wide area fiber and tv cable fast packet cell network 13 1997
 
Ascom Tech AG, Gesellschaft Fur Industrielle Forschung & Technologien-Der Ascom (1)
* 5805590 Switching device for digital data networks and asynchronous transfer mode 13 1995
 
ALCATEL USA;INTELLECTUAL PROPERTY DEPARTMENT (2)
* 5528592 Method and apparatus for route processing asynchronous transfer mode cells 48 1994
* 5452293 Apparatus and method of transmitting call information prior to establishing a connection path 37 1994
 
KDDI CORPORATION (1)
* 5062106 ATM exchange system 93 1990
 
SAMSUNG ELECTRONICS CO., LTD. (3)
* 6101190 Switching system and method for asynchronous transfer mode exchange for multimedia service 12 1996
* 6002688 Circuit for calculating number of idle virtual path identifier and virtual channel identifier 4 1997
6389022 Method for controlling the asynchronous transfer mode call in an ATM switching system 6 1998
 
NAXOS DATA LLC (1)
* 5430722 Hybrid photonic-electronic subscriber access unit for connecting optical subscriber lines to an asynchronous transfer mode telecommunication network 10 1994
 
HITACHI, LTD. (32)
* 5101404 Signalling apparatus for use in an ATM switching system 185 1989
* 5124977 Switching system for switching cells having error detection apparatus 35 1990
* 5159591 Packet communication method, packet communication device and packet switcher 13 1990
* 5740156 Packet switching system having self-routing switches 20 1991
* 5513177 Distributed switching system having at least one module 34 1991
* 5303236 Signalling apparatus for use in an ATM switching system 25 1991
* 5386415 Packet communiction method and packet communication apparatus 7 1991
* 5467346 Packet communication method and packet communication apparatus 11 1994
* 5799014 ATM cell switching system 24 1994
* RE36751 ATM switching system connectable to I/O links having different transmission rates 1 1995
* RE36716 Switching system for switching cells having error detection apparatus 2 1995
* 5745495 Apparatus for monitoring and controlling autonomous switching of trunk/subscriber lines in a distributed switching system 4 1995
* 6005867 Time-division channel arrangement 2 1995
* 6016317 ATM cell switching system 13 1995
* 6014382 ATM switching system including a switching control portion for distributing call set-up requirement signals 66 1997
* 5999537 Packet switching system having self-routing switches 3 1997
* 5995510 Distributed type switching system 6 1997
6339596 ATM cell switching system 15 1997
6285675 ATM cell switching system 12 1999
6618372 Packet switching system having-having self-routing switches 3 1999
6330240 ATM cell switching system 1 1999
6335934 Distributed type switching system 6 1999
6304570 Distributed type switching system 3 1999
6314096 Packet switching system having self-routing switches 7 1999
6463057 ATM cell switching system 4 2000
6396831 ATM cell switching system 0 2000
6445703 ATM cell switching system 3 2000
6546011 ATM cell switching system 0 2001
6389025 Distributed type switching system 3 2001
7058062 Packet switching system having self-routing switches 0 2002
6639920 Distributed type switching system 2 2002
6728242 ATM cell switching system 1 2003
 
FUJITSU NETWORK COMMUNICATIONS, INC. (7)
* 5781533 Link buffer sharing method and apparatus 17 1997
* 5982776 Multipoint-to-point arbitration in a network switch 35 1997
* 5933429 Multipoint-to-multipoint echo processing in a network switch 26 1997
6426957 Asynchronous transfer mode based service consolidation switch 54 1998
6256674 Method and apparatus for providing buffer state flow control at the link level in addition to flow control on a per-connection basis 41 1999
* 6076112 Prioritized access to shared buffers 15 1999
* 6167452 Joint flow control mechanism in a telecommunications network 14 1999
 
NEC CORPORATION (4)
* 5420863 Mobile communication system with cell-site switching for intra-cell handoff 100 1993
* 5471460 ATM switching system with unit switch selecting function for avoiding faulty unit switch 24 1994
* 7719990 Communications network traffic monitor system 1 2003
* 2003/0179,705 Communications network traffic monitor system 11 2003
 
AT&T LABS, INC. (1)
* 5136584 Hardware interface to a high-speed multiplexed link 156 1990
 
ELECTRONICS AND TELECOMMUNICATIONS RESEARCH INSTITUTE (1)
* 5193088 High speed ATM cell synchronizing switching apparatus 6 1991
 
AVAGO TECHNOLOGIES GENERAL IP (SINGAPORE) PTE. LTD. (7)
* 5856975 High speed single chip digital video network apparatus 143 1994
* 5708659 Method for hashing in a packet network switching system 202 1995
6535512 ATM communication system interconnect/termination unit 19 1996
* 5982749 ATM communication system interconnect/termination unit 47 1996
* 5920561 ATM communication system interconnect/termination unit 35 1996
* 5848068 ATM communication system interconnect/termination unit 35 1996
* 5841772 ATM communication system interconnect/termination unit 22 1996
 
OKI SEMICONDUCTOR CO., LTD. (1)
* 6246700 Clock signal supplying apparatus 0 1997
 
QUALCOMM INCORPORATED (1)
* 5311509 Configurable gigabits switch adapter 315 1992
 
ERICSSON AB (1)
* 6714543 ATM communications system and method 11 1999
 
CHARTOLEAUX KG LIMITED LIABILITY COMPANY (1)
* 5499235 Method for the simulation of transmission on a transmission network working in asynchronous transfer mode and simulator of transmission on such a network 3 1993
 
AT&T IPM CORP. (1)
* 5457684 Delay-less signal processing arrangement for use in an ATM network 106 1993
 
SIEMENS AKTIENGESELLSCHAFT (1)
* 5425024 Method for multi-address transmission of cells in a switching structure of a communication system operating in the asynchronous transfer mode 2 1993
 
CIENA CORPORATION (1)
* 6278535 SONET Jo byte message monitoring system 3 1998
 
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL) (1)
* 5430720 Identification of data packets by included selected bits 12 1993
 
RAMBUS INC. (2)
6603771 Highly scalable architecture for implementing switch fabrics with quality of services 4 1999
6584517 Circuit and method for supporting multicast/broadcast operations in multi-queue storage devices 4 1999
 
FUJITSU LIMITED (43)
* 5121385 Highly efficient multiplexing system 108 1989
* 5153578 Apparatus and method for establishing identical data in dual ATM switches 53 1990
* 5070498 Call control system in ATM switch 77 1990
* 5258979 ATM communication system with optimal traffic control by changing the allocated bandwidth 178 1991
* 5509007 Cell multiplexing apparatus handling multiple items of information 67 1993
* 5570362 System for transferring variable length cells under ATM 103 1995
* 5809012 Connectionless communication system 35 1995
* 5689501 Connectionless communication system 49 1995
* 5774675 Header converting method 20 1996
6236655 Port and link identification 15 1996
* 6141346 Point-to-multipoint transmission using subqueues 26 1996
* 6115748 Prioritized access to shared buffers 45 1996
* 6088736 Joint flow control mechanism in a telecommunications network 33 1996
* 6002667 Minimum guaranteed cell rate method and apparatus 26 1996
* 5996019 Network link access scheduling using a plurality of prioritized lists containing queue identifiers 54 1996
* 5982771 Controlling bandwidth allocation using a pace counter 76 1996
* 5983260 Serial control and data interconnects for coupling an I/O module with a switch fabric in a switch 29 1996
* 5978359 Allocated and dynamic switch flow control 112 1996
* 5956342 Priority arbitration for point-to-point and multipoint transmission 58 1996
* 5948067 Converting between an internal cell and multiple standard asynchronous transfer mode cells 15 1996
* 5917805 Network switch utilizing centralized and partitioned memory for connection topology information storage 21 1996
* 5909427 Redundant switch system and method of operation 52 1996
* 5905729 Mapping a data cell in a communication switch 17 1996
* 5896511 Method and apparatus for providing buffer state flow control at the link level in addition to flow control on a per-connection basis 17 1996
* 5889956 Hierarchical resource management with maximum allowable allocation boundaries 133 1996
* 5870538 Switch fabric controller comparator system and method 74 1996
* 5867663 Method and system for controlling network service parameters in a cell based communications network 67 1996
* 5862137 Point-to-multipoint arbitration 8 1996
* 5850395 Asynchronous transfer mode based service consolidation switch 79 1996
* 5822540 Method and apparatus for discarding frames in a communications device 27 1996
* 5790770 Method and apparatus for reducing information loss in a communications network 71 1996
* 5748629 Allocated and dynamic bandwidth management 200 1996
* 5748905 Frame classification using classification keys 110 1996
* 5898671 Transmitter controlled flow control for buffer allocation in wide area ATM networks 25 1996
* 5991298 Reliable and flexible multicast mechanism for ATM networks 18 1997
RE37435 Supervision control system 5 1997
6584070 Cell multiplexing apparatus handling multiple items of information 7 1997
* 6137795 Cell switching method and cell exchange system 12 1997
* 6411620 Connectionless communication system 15 1997
6781993 Switch and switching method for processing communication data of a particular connection 7 1999
6661796 Cell multiplexing apparatus handling multiple items of information 7 1999
* 2003/0117,957 Cell multiplexing apparatus handling multiple items of information 1 2003
* 2004/0071,138 Cell multiplexing apparatus handling multiple items of information 5 2003
 
SOUND VIEW INNOVATIONS, LLC (1)
* 5453979 Method and apparatus for generating route information for asynchronous transfer mode cell processing 58 1994
 
ALCATEL N.V. (2)
* 5173897 Method of restoring the correct cell sequence, particularly in an ATM exchange, and output unit therefor 126 1990
* 5202885 ATM exchange with copying capability 37 1991
 
SISVEL INTERNATIONAL S.A. (3)
* 7359403 Data segmentation method in a telecommunications system 26 1999
7873075 Data segmentation method in a telecommunications system 6 2008
* 2008/0144,556 DATA SEGMENTATION METHOD IN A TELECOMMUNICATIONS SYSTEM 12 2008
 
INTEL CORPORATION (5)
* 5802287 Single chip universal protocol multi-function ATM network interface 241 1995
* 5726985 ATM communication system interconnect/termination unit 52 1996
* 5959993 Scheduler design for ATM switches, and its implementation in a distributed shared memory architecture 37 1996
* 5831980 Shared memory fabric architecture for very high speed ATM switches 139 1996
6373846 Single chip networking device with enhanced memory access co-processor 46 1998
 
ARRIS ENTERPRISES, INC. (3)
* 5421030 Communications system and method for bi-directional communications between an upstream control facility and downstream user terminals 177 1991
* 5341415 Method and apparatus for sharing of common in-house wiring to permit multiple telephone carriers to serve the same customer 93 1992
* 5544164 Method and cell based wide area network alternative access telephone and data system 88 1994
 
NIPPON TELEGRAPH AND TELEPHONE CORPORATION (2)
* 5214642 ATM switching system and adaptation processing apparatus 88 1991
* 5339310 Switching apparatus for switched network of asynchronous transfer mode 54 1992
 
RPX CORPORATION (2)
6628656 Circuit, method and/or architecture for improving the performance of a serial communication link 2 1999
6625177 Circuit, method and/or architecture for improving the performance of a serial communication link 1 1999
 
TEXAS INSTRUMENTS INCORPORATED (2)
* 7027447 Communications interface between clock domains with minimal latency 9 2001
* 2001/0038,633 Communications interface between clock domains with minimal latency 22 2001
 
MITSUBISHI DENKI KABUSHIKI KAISHA (4)
* 5210744 Cell exchange apparatus 16 1990
* 5414696 Cell exchanging apparatus 13 1992
* 5398235 Cell exchanging apparatus 51 1993
* 5504741 Data queuing apparatus and ATM cell switch based on shifting and searching 42 1994
 
NORTEL NETWORKS LIMITED (1)
* 5499239 Large capacity modular ATM switch 20 1995
* Cited By Examiner