CA2006321A1 - Methode de controle de la congestion par les paquets et materiel de commutation de paquets - Google Patents

Methode de controle de la congestion par les paquets et materiel de commutation de paquets

Info

Publication number
CA2006321A1
CA2006321A1 CA2006321A CA2006321A CA2006321A1 CA 2006321 A1 CA2006321 A1 CA 2006321A1 CA 2006321 A CA2006321 A CA 2006321A CA 2006321 A CA2006321 A CA 2006321A CA 2006321 A1 CA2006321 A1 CA 2006321A1
Authority
CA
Canada
Prior art keywords
packet
output line
congestion
switching equipment
control method
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA2006321A
Other languages
English (en)
Other versions
CA2006321C (fr
Inventor
Isao Fukuta
Kenji Kawakita
Jiro Kashio
Yutaka Torii
Shinobu Gohara
Noboru Endo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Publication of CA2006321A1 publication Critical patent/CA2006321A1/fr
Application granted granted Critical
Publication of CA2006321C publication Critical patent/CA2006321C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/54Store-and-forward switching systems 
    • H04L12/56Packet switching systems
    • H04L12/5601Transfer mode dependent, e.g. ATM
    • H04L12/5602Bandwidth control in ATM Networks, e.g. leaky bucket
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L49/00Packet switching elements
    • H04L49/30Peripheral units, e.g. input or output ports
    • H04L49/3081ATM peripheral units, e.g. policing, insertion or extraction
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/54Store-and-forward switching systems 
    • H04L12/56Packet switching systems
    • H04L12/5601Transfer mode dependent, e.g. ATM
    • H04L2012/5629Admission control
    • H04L2012/5631Resource management and allocation
    • H04L2012/5632Bandwidth allocation
    • H04L2012/5635Backpressure, e.g. for ABR
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/54Store-and-forward switching systems 
    • H04L12/56Packet switching systems
    • H04L12/5601Transfer mode dependent, e.g. ATM
    • H04L2012/5629Admission control
    • H04L2012/5631Resource management and allocation
    • H04L2012/5636Monitoring or policing, e.g. compliance with allocated rate, corrective actions
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00Data switching networks
    • H04L12/54Store-and-forward switching systems 
    • H04L12/56Packet switching systems
    • H04L12/5601Transfer mode dependent, e.g. ATM
    • H04L2012/5638Services, e.g. multimedia, GOS, QOS
    • H04L2012/5646Cell characteristics, e.g. loss, delay, jitter, sequence integrity
    • H04L2012/5652Cell construction, e.g. including header, packetisation, depacketisation, assembly, reassembly

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)
CA002006321A 1988-12-23 1989-12-21 Methode de controle de la congestion par les paquets et materiel de commutation de paquets Expired - Fee Related CA2006321C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP32330088A JP2753294B2 (ja) 1988-12-23 1988-12-23 パケット輻輳制御方法およびパケット交換装置
JP63-323300 1988-12-23

Publications (2)

Publication Number Publication Date
CA2006321A1 true CA2006321A1 (fr) 1990-06-23
CA2006321C CA2006321C (fr) 1994-08-23

Family

ID=18153244

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002006321A Expired - Fee Related CA2006321C (fr) 1988-12-23 1989-12-21 Methode de controle de la congestion par les paquets et materiel de commutation de paquets

Country Status (5)

Country Link
US (1) US5090011A (fr)
EP (1) EP0374928B1 (fr)
JP (1) JP2753294B2 (fr)
CA (1) CA2006321C (fr)
DE (1) DE68927952T2 (fr)

Families Citing this family (125)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5115429A (en) * 1990-08-02 1992-05-19 Codex Corporation Dynamic encoding rate control minimizes traffic congestion in a packet network
CA2049428C (fr) * 1990-08-20 1996-06-18 Yasuro Shobatake Systeme de communication mta
AU8636391A (en) * 1990-10-10 1992-05-20 British Telecommunications Public Limited Company Network traffic management
JP3441726B2 (ja) * 1990-11-30 2003-09-02 株式会社日立製作所 通信装置及び通信方法
US6847611B1 (en) * 1990-12-10 2005-01-25 At&T Corp. Traffic management for frame relay switched data service
US5809012A (en) * 1991-01-31 1998-09-15 Fujitsu Limited Connectionless communication system
CA2060559A1 (fr) * 1991-02-05 1992-08-06 Ryoichi Ishibashi Dispositif pour reduire l'encombrement dans un systeme de communication
JP3025060B2 (ja) * 1991-06-03 2000-03-27 富士通株式会社 装置監視方式
US5450439A (en) * 1991-08-28 1995-09-12 Matsushita Graphic Communication Systems, Inc. Communication-tracing-information processing device
US5852601A (en) * 1991-09-09 1998-12-22 Network Equipment Technologies, Inc. Method and apparatus for reactive congestion control in an asynchronous transfer mode (ATM) network
SE469252B (sv) * 1991-10-04 1993-06-07 Eritel Ab Foerfarande foer kontroll och styrning av datafloedet i ett paketdatanaet omfattande ett antal linjer och ett antal noder daer linjerna via noder foerbinder ett antal terminaler
JPH05151178A (ja) * 1991-11-26 1993-06-18 Toshiba Corp 分散協調型問題解決装置
US5313454A (en) * 1992-04-01 1994-05-17 Stratacom, Inc. Congestion control for cell networks
JPH07107990B2 (ja) * 1992-11-12 1995-11-15 日本電気株式会社 Atm方式による送信装置及び通信システム
MX9306994A (es) * 1992-12-15 1994-06-30 Ericsson Telefon Ab L M Sistema de control de flujo para interruptores de paquete.
JPH06188901A (ja) * 1992-12-18 1994-07-08 Nec Corp 非同期転送モード輻輳判定方式
US5434850A (en) * 1993-06-17 1995-07-18 Skydata Corporation Frame relay protocol-based multiplex switching scheme for satellite
US6771617B1 (en) * 1993-06-17 2004-08-03 Gilat Satellite Networks, Ltd. Frame relay protocol-based multiplex switching scheme for satellite mesh network
GB9312741D0 (en) * 1993-06-21 1993-08-04 Plessey Telecomm Nitwork management
US5442624A (en) * 1993-10-29 1995-08-15 At&T Corp. Dynamic access control for an ATM network
JP3386215B2 (ja) * 1994-02-10 2003-03-17 富士通株式会社 Atm通信システムにおけるais伝送方式、送信側atm装置、及びatm通信システム
KR970000668B1 (ko) * 1994-02-21 1997-01-16 재단법인 한국전자통신연구소 비동기 전달 모드(atm) 망에서의 폭주를 예방하기 위한 트래픽 출력 억제 장치 및 방법
FI97186C (fi) * 1994-11-11 1996-10-25 Nokia Telecommunications Oy Ylikuormituksen esto tietoliikenneverkon solmussa
JPH08139737A (ja) * 1994-11-14 1996-05-31 Nec Corp 輻輳制御方式
IT1267624B1 (it) * 1994-11-24 1997-02-07 Italtel Spa Dispositivo per il trattamento delle funzioni atm.
ZA959722B (en) * 1994-12-19 1996-05-31 Alcatel Nv Traffic management and congestion control for packet-based networks
KR0132960B1 (ko) * 1994-12-22 1998-04-21 양승택 망 노드 폭주상태 결정장치 및 방법
JPH0927811A (ja) * 1995-07-13 1997-01-28 Fujitsu Ltd 輻輳監視制御装置
WO1997004543A2 (fr) * 1995-07-19 1997-02-06 Fujitsu Network Communications, Inc. Regulation du flux d'un commutateur bimode alloue/dynamique
WO1997004552A1 (fr) * 1995-07-19 1997-02-06 Fujitsu Network Communications, Inc. Transmission point-multipoint par l'intermediaire de sous-files d'attente
EP0873611A1 (fr) * 1995-09-14 1998-10-28 Fujitsu Network Communications, Inc. Commande de flux commande par emetteur pour attribution de tampons dans des reseaux mta longue distance
US5742588A (en) * 1995-09-18 1998-04-21 Telefonaktiebolaget Lm Ericsson Packet switched traffic management in a cellular telecommunications system
US6097700A (en) * 1995-09-18 2000-08-01 Telefonaktiebolaget L M Ericsson (Publ) Packet switched radio channel congestion control
US5757772A (en) * 1995-09-18 1998-05-26 Telefonaktiebolaget Lm Ericsson Packet switched radio channel traffic supervision
US5666348A (en) * 1995-09-18 1997-09-09 Telefonaktiebolaget L M Ericsson (Publ.) Packet switched radio channel admission control in a cellular telecommunications system
US5701292A (en) * 1995-12-04 1997-12-23 Lucent Technologies Inc. Method and apparatus for controlling data transfer rates of data sources in asynchronous transfer mode-based networks
US6463036B2 (en) * 1996-01-11 2002-10-08 Hitachi, Ltd. ATM communication apparatus and method of controlling congestion in a communication network using the ATM communication apparatus
WO1997026737A1 (fr) * 1996-01-16 1997-07-24 Fujitsu Limited Dispositif a multidestination fiable et souple destine aux reseaux mta
JP3622312B2 (ja) 1996-01-29 2005-02-23 株式会社日立製作所 パケット交換機およびセル転送制御方法
US5905711A (en) * 1996-03-28 1999-05-18 Lucent Technologies Inc. Method and apparatus for controlling data transfer rates using marking threshold in asynchronous transfer mode networks
US5822300A (en) * 1996-04-02 1998-10-13 Compaq Computer Corporation Congestion management scheme
JP2760343B2 (ja) * 1996-05-31 1998-05-28 日本電気株式会社 Atmセル化回路
JP2930023B2 (ja) * 1996-07-19 1999-08-03 日本電気株式会社 Atm網における仮想送信端末/仮想受信端末
US5748905A (en) * 1996-08-30 1998-05-05 Fujitsu Network Communications, Inc. Frame classification using classification keys
KR100318957B1 (ko) 1996-09-02 2002-04-22 윤종용 비동기전송모드망에서의폭주통보장치및폭주제어방법
FR2754123B1 (fr) 1996-10-01 1999-01-08 Alsthom Cge Alcatel Systeme de gestion de trafic et de controle d'encombrement pour reseaux a base de paquets
JP3518209B2 (ja) * 1996-12-05 2004-04-12 株式会社日立製作所 Atm交換機および輻輳制御方式
JP3525656B2 (ja) * 1996-12-06 2004-05-10 株式会社日立製作所 パケット交換機、および輻輳通知方式
US6990069B1 (en) 1997-02-24 2006-01-24 At&T Corp. System and method for improving transport protocol performance in communication networks having lossy links
US5974028A (en) * 1997-02-24 1999-10-26 At&T Corp. System and method for improving transport protocol performance in communication networks having lossy links
US6026075A (en) * 1997-02-25 2000-02-15 International Business Machines Corporation Flow control mechanism
US6192422B1 (en) * 1997-04-16 2001-02-20 Alcatel Internetworking, Inc. Repeater with flow control device transmitting congestion indication data from output port buffer to associated network node upon port input buffer crossing threshold level
SE510170C2 (sv) * 1997-05-16 1999-04-26 Ericsson Telefon Ab L M Metod och anordning för styrning av datapaketflöde medelst baktrycksmeddelande
US6081524A (en) 1997-07-03 2000-06-27 At&T Corp. Frame relay switched data service
US6141321A (en) * 1997-07-08 2000-10-31 Alcatel Networks Corporation Method and apparatus for the efficient processing of ABR cells in an ATM switch
US6026444A (en) * 1998-06-24 2000-02-15 Siemens Pyramid Information Systems, Inc. TORUS routing element error handling and self-clearing with link lockup prevention
US7707600B1 (en) 1998-08-21 2010-04-27 Intel Corporation Confirming video transmissions
US7382736B2 (en) * 1999-01-12 2008-06-03 Mcdata Corporation Method for scoring queued frames for selective transmission through a switch
JP2001156842A (ja) * 1999-11-26 2001-06-08 Mitsubishi Electric Corp 伝送システム
US8161182B1 (en) * 2000-01-26 2012-04-17 Cisco Technology, Inc. Managing network congestion using dynamically advertised congestion status
US6452903B1 (en) 2000-05-31 2002-09-17 Fujitsu Network Communications, Inc. Network switch supporting rate-based and credit-based flow control mechanisms on a link-by-link basis
US6466541B1 (en) 2000-05-31 2002-10-15 Fujitsu Network Communications, Inc. Cell pacing on a network link employing a rate-based flow control protocol with underlying credit-based flow control mechanisms
US6950393B1 (en) 2000-11-22 2005-09-27 P-Cube, Ltd. Method and apparatus for process flow random early discard in service aware networking systems
US7415025B1 (en) 2000-12-29 2008-08-19 Cisco Technology, Inc. Method and apparatus for clearing a large number of connections in an ATM network
US7158486B2 (en) * 2001-03-12 2007-01-02 Opcoast Llc Method and system for fast computation of routes under multiple network states with communication continuation
DE50113534D1 (de) * 2001-05-04 2008-03-13 Nokia Siemens Networks Gmbh Verfahren zur Flusskontrolle bei mehreren Sendern mit unbekannter und/oder verschiedener Sendeleistung
US7295516B1 (en) 2001-11-13 2007-11-13 Verizon Services Corp. Early traffic regulation techniques to protect against network flooding
US7570584B1 (en) 2002-03-29 2009-08-04 Cisco Technology, Inc. Network-wide congestion control of SPVC signaling messages
US7254632B2 (en) * 2002-04-26 2007-08-07 P-Cube Ltd. Apparatus and method for pattern matching in text based protocol
US7154886B2 (en) * 2002-07-22 2006-12-26 Qlogic Corporation Method and system for primary blade selection in a multi-module fiber channel switch
US7230929B2 (en) * 2002-07-22 2007-06-12 Qlogic, Corporation Method and system for dynamically assigning domain identification in a multi-module fibre channel switch
US7397768B1 (en) 2002-09-11 2008-07-08 Qlogic, Corporation Zone management in a multi-module fibre channel switch
US6886141B1 (en) * 2002-10-07 2005-04-26 Qlogic Corporation Method and system for reducing congestion in computer networks
JP3712399B2 (ja) * 2003-03-17 2005-11-02 ボーダフォン株式会社 局装置
US7463646B2 (en) * 2003-07-16 2008-12-09 Qlogic Corporation Method and system for fibre channel arbitrated loop acceleration
US7471635B2 (en) * 2003-07-16 2008-12-30 Qlogic, Corporation Method and apparatus for test pattern generation
US7453802B2 (en) * 2003-07-16 2008-11-18 Qlogic, Corporation Method and apparatus for detecting and removing orphaned primitives in a fibre channel network
US7620059B2 (en) * 2003-07-16 2009-11-17 Qlogic, Corporation Method and apparatus for accelerating receive-modify-send frames in a fibre channel network
US7630384B2 (en) * 2003-07-21 2009-12-08 Qlogic, Corporation Method and system for distributing credit in fibre channel systems
US7430175B2 (en) * 2003-07-21 2008-09-30 Qlogic, Corporation Method and system for managing traffic in fibre channel systems
US7406092B2 (en) * 2003-07-21 2008-07-29 Qlogic, Corporation Programmable pseudo virtual lanes for fibre channel systems
US7580354B2 (en) * 2003-07-21 2009-08-25 Qlogic, Corporation Multi-speed cut through operation in fibre channel switches
US7522529B2 (en) * 2003-07-21 2009-04-21 Qlogic, Corporation Method and system for detecting congestion and over subscription in a fibre channel network
US7792115B2 (en) * 2003-07-21 2010-09-07 Qlogic, Corporation Method and system for routing and filtering network data packets in fibre channel systems
US7583597B2 (en) * 2003-07-21 2009-09-01 Qlogic Corporation Method and system for improving bandwidth and reducing idles in fibre channel switches
US7558281B2 (en) * 2003-07-21 2009-07-07 Qlogic, Corporation Method and system for configuring fibre channel ports
US7684401B2 (en) * 2003-07-21 2010-03-23 Qlogic, Corporation Method and system for using extended fabric features with fibre channel switch elements
US7512067B2 (en) * 2003-07-21 2009-03-31 Qlogic, Corporation Method and system for congestion control based on optimum bandwidth allocation in a fibre channel switch
US7420982B2 (en) * 2003-07-21 2008-09-02 Qlogic, Corporation Method and system for keeping a fibre channel arbitrated loop open during frame gaps
US7573909B2 (en) * 2003-07-21 2009-08-11 Qlogic, Corporation Method and system for programmable data dependant network routing
US7894348B2 (en) * 2003-07-21 2011-02-22 Qlogic, Corporation Method and system for congestion control in a fibre channel switch
US7525983B2 (en) * 2003-07-21 2009-04-28 Qlogic, Corporation Method and system for selecting virtual lanes in fibre channel switches
US7477655B2 (en) * 2003-07-21 2009-01-13 Qlogic, Corporation Method and system for power control of fibre channel switches
US7646767B2 (en) 2003-07-21 2010-01-12 Qlogic, Corporation Method and system for programmable data dependant network routing
US7447224B2 (en) * 2003-07-21 2008-11-04 Qlogic, Corporation Method and system for routing fibre channel frames
US7522522B2 (en) * 2003-07-21 2009-04-21 Qlogic, Corporation Method and system for reducing latency and congestion in fibre channel switches
US7466700B2 (en) * 2003-07-21 2008-12-16 Qlogic, Corporation LUN based hard zoning in fibre channel switches
JP4297765B2 (ja) * 2003-10-15 2009-07-15 富士通株式会社 伝送システム
US7564789B2 (en) * 2004-02-05 2009-07-21 Qlogic, Corporation Method and system for reducing deadlock in fibre channel fabrics using virtual lanes
US7480293B2 (en) * 2004-02-05 2009-01-20 Qlogic, Corporation Method and system for preventing deadlock in fibre channel fabrics using frame priorities
KR100656509B1 (ko) * 2004-03-03 2006-12-11 삼성전자주식회사 비디오 서비스 대역폭 보장을 위한 패킷 체증제어 방법
US7783769B2 (en) * 2004-03-31 2010-08-24 Intel Corporation Accelerated TCP (Transport Control Protocol) stack processing
JP4288199B2 (ja) * 2004-03-31 2009-07-01 株式会社エヌ・ティ・ティ・ドコモ 移動通信方法、移動局及び無線制御装置
US7930377B2 (en) * 2004-04-23 2011-04-19 Qlogic, Corporation Method and system for using boot servers in networks
US7340167B2 (en) 2004-04-23 2008-03-04 Qlogic, Corporation Fibre channel transparent switch for mixed switch fabrics
US7668141B2 (en) 2004-07-06 2010-02-23 Motorola, Inc. Method and apparatus for managing packet data loss in a wireless network
US7742412B1 (en) * 2004-09-29 2010-06-22 Marvell Israel (M.I.S.L.) Ltd. Method and apparatus for preventing head of line blocking in an ethernet system
US7411958B2 (en) * 2004-10-01 2008-08-12 Qlogic, Corporation Method and system for transferring data directly between storage devices in a storage area network
US8295299B2 (en) 2004-10-01 2012-10-23 Qlogic, Corporation High speed fibre channel switch element
US7593997B2 (en) 2004-10-01 2009-09-22 Qlogic, Corporation Method and system for LUN remapping in fibre channel networks
US7519058B2 (en) * 2005-01-18 2009-04-14 Qlogic, Corporation Address translation in fibre channel switches
US7952997B2 (en) * 2006-05-18 2011-05-31 Mcdata Corporation Congestion management groups
US20080159277A1 (en) * 2006-12-15 2008-07-03 Brocade Communications Systems, Inc. Ethernet over fibre channel
US20080159260A1 (en) * 2006-12-15 2008-07-03 Brocade Communications Systems, Inc. Fibre channel over ethernet frame
US20080181243A1 (en) * 2006-12-15 2008-07-31 Brocade Communications Systems, Inc. Ethernet forwarding in high performance fabrics
US7996520B2 (en) 2007-09-19 2011-08-09 Cisco Technology, Inc. Behavioral classification of communication sessions using active session initiation
US8583780B2 (en) * 2007-11-20 2013-11-12 Brocade Communications Systems, Inc. Discovery of duplicate address in a network by reviewing discovery frames received at a port
US8108454B2 (en) * 2007-12-17 2012-01-31 Brocade Communications Systems, Inc. Address assignment in Fibre Channel over Ethernet environments
FR2925806B1 (fr) * 2007-12-24 2010-02-19 St Microelectronics Grenoble Procede de transmission de donnees et dispositif correspondant
US20090296726A1 (en) * 2008-06-03 2009-12-03 Brocade Communications Systems, Inc. ACCESS CONTROL LIST MANAGEMENT IN AN FCoE ENVIRONMENT
US8848575B2 (en) 2009-02-23 2014-09-30 Brocade Communications Systems, Inc. High availability and multipathing for fibre channel over ethernet
US8427958B2 (en) 2010-04-30 2013-04-23 Brocade Communications Systems, Inc. Dynamic latency-based rerouting
US9154394B2 (en) 2010-09-28 2015-10-06 Brocade Communications Systems, Inc. Dynamic latency-based rerouting
JP6281327B2 (ja) 2014-03-06 2018-02-21 富士通株式会社 情報処理システム、情報処理装置、スイッチ装置および情報処理システムの制御方法
US11863451B2 (en) * 2022-05-16 2024-01-02 Huawei Technologies Co., Ltd. Hardware accelerated temporal congestion signals

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2538984A1 (fr) * 1982-12-30 1984-07-06 Devault Michel Commutateur pour reseau numerique multidebit a commutation temporelle asynchrone adapte aux videocommutations
US4734907A (en) * 1985-09-06 1988-03-29 Washington University Broadcast packet switching network
CA1266318A (fr) * 1985-10-07 1990-02-27 Hiroshi Suzuki Systeme de communication rapide a commutation de paquets avec controle de circulation de bout en bout et retransmission
US4920534A (en) * 1986-02-28 1990-04-24 At&T Bell Laboratories System for controllably eliminating bits from packet information field based on indicator in header and amount of data in packet buffer
JPS6324742A (ja) * 1986-07-17 1988-02-02 Fujitsu Ltd パケツト交換輻輳抑止方式
US4769810A (en) * 1986-12-31 1988-09-06 American Telephone And Telegraph Company, At&T Bell Laboratories Packet switching system arranged for congestion control through bandwidth management
US4769811A (en) * 1986-12-31 1988-09-06 American Telephone And Telegraph Company, At&T Bell Laboratories Packet switching system arranged for congestion control
US4839891A (en) * 1987-07-24 1989-06-13 Nec Corporation Method for controlling data flow

Also Published As

Publication number Publication date
US5090011A (en) 1992-02-18
DE68927952T2 (de) 1997-10-30
JP2753294B2 (ja) 1998-05-18
DE68927952D1 (de) 1997-05-15
EP0374928B1 (fr) 1997-04-09
CA2006321C (fr) 1994-08-23
EP0374928A3 (fr) 1992-05-13
EP0374928A2 (fr) 1990-06-27
JPH02170646A (ja) 1990-07-02

Similar Documents

Publication Publication Date Title
CA2006321A1 (fr) Methode de controle de la congestion par les paquets et materiel de commutation de paquets
CA2090608A1 (fr) Reseau de dispositifs portatifs de surveillance des patients
EP0273249A3 (fr) Commutateur à tolérance de fautes avec modes d'opération à sélectionner
EP0128574A3 (fr) Dispositif de surveillance de charge électrique, et méthode
FI892674A (fi) Digitaalinen signaalinsiirtojärjestelmä sisäjohdintekniikkaa varten
AU8979182A (en) Fault location in power transmission lines
AU552086B2 (en) Fault location in power transmission system
EP0359352A3 (fr) Dispositif de sécurité pour télécommunications
ATE46872T1 (de) Uebertragungssystem.
MY105724A (en) Method and apparatus for monitoring an ac transmission line.
EP0845879A3 (fr) Unité de commutation optique, particulièrement pour commuter vers des composants alternatifs dans des systèmes de transmission optique
JPS55154639A (en) Control system for microcomputer
JPS57173246A (en) Data transmission system
JPS598243U (ja) デマンド制御装置
JPS573153A (en) Fault detection system
CA2014369A1 (fr) Systeme de reseau a terminaux a attributs differents
JPS57118448A (en) Optical repeater
JPS5665550A (en) Calling out system for terminal device
JPS6462928A (en) Optical repeater
DE3663752D1 (en) Remote control system
JPS5537007A (en) Obstacle monitoring concentration management system
EP0357448A3 (fr) Alimentations électriques de puissance
JPS57138240A (en) Hairpin network
JPS5684058A (en) Data transmission system
JPS57125534A (en) Low power consumption type communication equipment

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed