US Patent No: 5,218,600

Number of patents in Portfolio can not be more than 2000

Process for networking computers and/or computer networks and networking systems

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ATTORNEY / AGENT: (SPONSORED)
 

Importance

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Abstract

In a process for interconnecting computers and/or computer networks, the occurrence of an interruption in the network system is detected. A redundant connection is activated as a function of said interruption. The redundant connection is inactive in undisturbed operation. The presence of an interruption is detected by determining whether a data signal appears within a predetermined period of time at the connectors of a redundant connective device. Different criteria are provided to interrupt a closed connecting ring generated by the activation of the redundant connecting device when the initial interference in the network system is eliminated.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
RICHARD HIRSCHMANN GMBH & CO.NECKARTENZLINGEN17

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Schenkyr, Rainer Schlierbach, DE 4 112
Schmid, Bernhard Sindelfingen, DE 40 172

Cited Art

Patent Info (Count) # Cites Year
 
ALLEN-BRADLEY COMPANY, INC. (1)
4,527,270 Communications network with stations that detect and automatically bypass faults 84 1983
 
HITACHI, LTD. (1)
4,704,714 Method of detecting recovery from fault in a data transmission system which effects loopback control 24 1984
 
NEC CORPORATION (1)
5,010,550 Transmission line switching system 33 1989

Patent Citation Ranking

Forward Cites

Patent Info (Count) # Cites Year
 
CISCO TECHNOLOGY, INC. (83)
5,781,715 Fault-tolerant bridge/router with a distributed switch-over mechanism 59 1992
5,473,599 Standby router protocol 531 1994
5,737,526 Network having at least two routers, each having conditional filter so one of two transmits given frame and each transmits different frames, providing connection to a subnetwork 66 1994
6,195,705 Mobile IP mobility agent standby protocol 331 1998
6,760,444 Mobile IP authentication 85 1999
6,636,498 Mobile IP mobile router 103 1999
6,501,746 Mobile IP dynamic home address resolution 47 1999
6,621,810 Mobile IP intra-agent mobility 72 1999
6,466,964 Methods and apparatus for providing mobility of a node that does not support mobility 160 1999
6,751,191 Load sharing and redundancy scheme 92 1999
7,058,007 Method for a cable modem to rapidly switch to a backup CMTS 32 2000
6,839,829 Routing protocol based redundancy design for shared-access networks 40 2000
7,130,629 Enabling services for multiple sessions using a single mobile node 26 2000
6,765,892 Optimizing IP multicast data transmission in a mobile IP environment 29 2000
6,982,967 Methods and apparatus for implementing a proxy mobile node in a wireless local area network 46 2000
6,963,918 Voice over IP optimization for mobile IP 8 2000
7,042,864 Enabling push technologies for mobile IP 10 2000
6,487,605 Mobile IP mobility agent standby protocol 127 2000
7,042,876 Stateful network address translation protocol implemented over a data network 35 2000
6,959,341 Dynamic network allocation for mobile router 15 2000
6,885,667 Redirection to a virtual router 26 2000
7,295,551 Support mobile device in asymmetric link environment 4 2000
7,152,238 Enabling mobility for point to point protocol (PPP) users using a node that does not support mobility 23 2000
7,881,208 Gateway load balancing protocol 9 2001
7,036,143 Methods and apparatus for virtual private network based mobility 18 2001
7,227,863 Methods and apparatus for implementing home agent redundancy 20 2001
7,051,109 Methods and apparatus for using SCTP to provide mobility of a network device 9 2001
7,409,549 Methods and apparatus for dynamic home agent assignment in mobile IP 11 2001
7,227,838 Enhanced internal router redundancy 14 2001
7,116,634 TCP sequence number recovery in a redundant forwarding system 9 2001
7,079,520 Methods and apparatus for implementing NAT traversal in mobile IP 20 2001
7,471,661 Methods and apparatus for supporting proxy mobile IP registration in a wireless local area network 5 2002
7,284,057 Methods and apparatus for Mobile IP Home Agent clustering 8 2002
7,587,498 Methods and apparatus for mobile IP dynamic home agent allocation 5 2002
7,346,053 Methods and apparatus for supporting IP multicast for a mobile router 18 2002
7,280,557 Mechanisms for providing stateful NAT support in redundant and asymetric routing environments 23 2002
7,174,376 IP subnet sharing technique implemented without using bridging or routing protocols 8 2002
7,227,872 Mechanisms for providing stateful NAT support in redundant and asymetric routing environments 25 2002
6,795,857 Methods and apparatus for providing mobility of a node that does not support mobility 64 2002
7,379,433 Methods and apparatus for broadcast optimization in mobile IP 2 2002
7,707,310 Mobile IP registration supporting port identification 1 2002
7,447,183 Mobile IP dynamic Home Address resolution 4 2002
7,457,289 Inter-proxy communication protocol for mobile IP 7 2002
7,870,389 Methods and apparatus for authenticating mobility entities using kerberos 5 2002
7,362,742 Methods and apparatus for synchronizing subnet mapping tables 8 2003
7,599,370 Methods and apparatus for optimizing NAT traversal in Mobile IP 2 2003
7,505,432 Methods and apparatus for securing proxy Mobile IP 8 2003
7,535,871 Mobile IP intra-agent mobility 0 2003
7,593,346 Distributing and balancing traffic flow in a virtual gateway 8 2003
7,352,731 Mobile IP mobile router 10 2003
7,006,431 Load sharing and redundancy scheme 39 2003
7,417,961 Methods and apparatus for implementing a speed sensitive mobile router 6 2003
7,840,988 Front-end structure for access network line card 0 2004
7,168,090 Mobile IP authentication 13 2004
7,447,188 Methods and apparatus for supporting mobile IP proxy registration in a system implementing mulitple VLANs 4 2004
7,079,504 Optimizing IP multicast data transmission in a mobile IP environment 7 2004
7,966,409 Routing protocol based redundancy design for shared-access networks 1 2004
7,639,802 Methods and apparatus for bootstrapping Mobile-Foreign and Foreign-Home authentication keys in Mobile IP 5 2004
7,502,331 Infrastructure-less bootstrapping: trustless bootstrapping to enable mobility for mobile devices 6 2004
8,059,661 Methods and apparatus for using DHCP for home address management of nodes attached to an edge device and for performing mobility and address management as a proxy home agent 0 2004
7,136,383 Redirection to a virtual router 18 2005
8,077,604 Load sharing and redundancy scheme 0 2005
7,746,874 Dynamic network allocation for mobile router 0 2005
7,580,391 Dynamic network allocation for mobile router 4 2005
7,626,963 EAP/SIM authentication for mobile IP to leverage GSM/SIM authentication infrastructure 6 2005
7,324,492 Enabling push technologies for mobile IP 4 2005
7,894,427 Stateful network address translation protocol implemented over a data network 1 2006
7,903,585 Topology discovery of a private network 0 2006
7,633,917 Mobile network device multi-link optimizations 2 2006
7,246,373 Methods and apparatus for virtual private network based mobility 10 2006
7,457,882 Methods and apparatus for using SCTP to provide mobility of a network device 6 2006
8,358,635 Methods and apparatus for implementing NAT traversal in mobile IP 0 2006
7,421,077 Mobile IP authentication 0 2006
7,817,664 Mobile IP accounting 0 2006
7,895,312 IP subnet sharing technique implemented without using bridging or routing protocols 0 2006
7,630,352 Support mobile device in asymmetric link environment 0 2006
7,693,048 Enhanced internal router redundancy 2 2007
8,243,681 Methods and apparatus for broadcast optimization in mobile IP 0 2008
8,422,467 Methods and apparatus for supporting proxy mobile IP registration in a wireless local area network 0 2008
8,259,676 Methods and apparatus for securing proxy mobile IP 0 2009
7,818,004 Mobile network device multi-link optimizations 1 2009
8,165,290 Methods and apparatus for bootstrapping mobile-foreign and foreign-home authentication keys in mobile IP 1 2009
8,170,552 Mobile network device multi-link optimizations 0 2010
 
OVERTURE NETWORKS, INC. (3)
6,928,050 Protected switching ring 12 2004
7,355,965 Apparatus and method for rapid detection of unidirectional breaks in a network ring 8 2005
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FUJITSU LIMITED (2)
5,469,427 Transmission line control system and interface unit therefor 4 1994
5,790,520 Path protection switch ring system for line saving even though line setting operation was not carried out 10 1996
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (2)
5,506,964 System with multiple interface logic circuits including arbitration logic for individually linking multiple processing systems to at least one remote sub-system 10 1992
6,038,618 Bypass circuit for bypassing host computer which are connected to plurality of devices via two individual ports upon detecting lack of communication at both ports 19 1997
 
INVENSYS SYSTEMS, INC. (2)
6,173,411 Method and system for fault-tolerant network connection switchover 41 1998
6,581,166 Network fault detection and recovery 81 2000
 
ALCATEL N.V. (1)
5,530,694 Device for connecting a station to a local area network comprising at least one ring 9 1993
 
AT&T IPM CORP. (1)
5,440,540 Ring interworking between a bidirectional line-switched ring transmission system and another ring transmission system 32 1992
 
FARALLON COMPUTING, INC. (1)
5,577,023 Method and apparatus for automatic configuration of a network connection 82 1993
 
HASHIMOTO, NORIAKI (1)
6,894,978 Method and system for operation of a resilient closed communication network without a dedicated protection network segment 20 2000
 
MAZDA MOTOR CORPORATION (1)
5,588,002 Multiplex transmission apparatus for supporting prioritized communications among a plurality of network nodes 8 1995
 
NICE SYSTEMS LTD. (1)
5,937,029 Data logging system employing M?N +1! redundancy 21 1996
 
NOKIA SIEMENS NETWORKS GMBH & CO. KG (1)
5,440,539 Method of controlling an electrical switching device in response to a signal configuration of a switching signal 0 1993
 
NXP B.V. (1)
7,099,959 Network comprising a plurality of network nodes and at least one star node 3 2000
 
SIEMENS AKTIENGESELLSCHAFT (1)
7,493,524 Network with redundancy properties, a branching unit for a user device in a network, redundancy manager for a network with redundancy properties and method for operating a network with redundancy properties 1 2004
 
U.S. PHILIPS CORPORATION (1)
5,649,091 Local area network redundant pieces of interconnection equipment a false physical address and a logical address in common to form a unique entity 12 1995