Source: http://www.google.de/patents/US5404465?hl=de
Timestamp: 2013-05-21 03:13:04
Document Index: 395645240

Matched Legal Cases: ['arts 1', 'art 3', 'arts 1', 'art 3', 'arts 1', 'art 3', 'arts 1', 'art 3']

Patent US5404465 - Method and apparatus for monitoring and switching over to a back-up bus in a ... - Google PatenteSuche Bilder Maps Play YouTube News Gmail Drive Mehr » Erweiterte Patentsuche | Webprotokoll | Anmelden Erweiterte Patentsuche PatenteA method A and apparatus for monitoring and switching over from a primary bus to a back-up bus in a network having a master node and at least one slave node, the primary bus and the back-up bus each interconnecting the master node and the at least one slave node. The method includes periodically sending...http://www.google.de/patents/US5404465?utm_source=gb-gplus-sharePatent US5404465 - Method and apparatus for monitoring and switching over to a back-up bus in a redundant trainline monitor system Ver�ffentlichungsnummerUS5404465 APublikationstypErteilung Anmeldenummer08/029,348 Ver�ffentlichungsdatum4. Apr. 1995Eingetragen10. M�rz 1993 Priorit�tsdatum18. M�rz 1992 ErfinderJoseph S. MajewskiMichael R. NovakovichUrspr�nglich Bevollm�chtigterAeg Transportation Systems, Inc. US-Klassifikation710/110714/43714/712714/4.11Internationale KlassifikationG06F11/20 UnternehmensklassifikationB61L15/0063H04L12/40189H04L2012/40293G06F11/2007 Europ�ische KlassifikationG06F11/20C4B61L15/00EReferenzenPatentzitate (7)Nichtpatentzitate (4) Referenziert von (23)Externe LinksUSPTO USPTO-Zuordnung EspacenetMethod and apparatus for monitoring and switching over to a back-up bus in a redundant trainline monitor systemUS 5404465 A Zusammenfassung A method A and apparatus for monitoring and switching over from a primary bus to a back-up bus in a network having a master node and at least one slave node, the primary bus and the back-up bus each interconnecting the master node and the at least one slave node. The method includes periodically sending via the back-up bus from the master node to each of the slave nodes a master test packet containing a master address of the master node on the back-up bus and sending on the back-up bus from the at least one slave node to the master node and in response to receiving the master test packet, a slave test packet containing a slave address of the at least one slave node on the back-up bus. The method further includes indicating failures on the primary and back-up bus and disconnecting the primary bus from the master node and the at least one slave node and resuming communications between the master node and the at least one slave node via the back-up bus when a failure occurs on the primary bus and no failures occur on the back-up bus.
What is claimed is: 1. A method for monitoring and switching over from a primary train bus to a back-up train bus in a serial communications network having a master node and at least one slave node, the primary train bus and the back-up train bus each serially interconnecting the master node and the at least one slave node, the master node and the at least one slave node having respective addresses on the primary train bus and the backup train bus, addresses of slave nodes on the primary train bus and the backup train bus being accessible to the master node, the method comprising the steps of: communicating over the primary train bus; indicating during communication over the primary train bus an occurrence of a failure on the primary train bus; periodically sending on the back-up train bus from the master node to each of the slave nodes, a master test packet containing the address of the master node on the back-up train bus; sending on the back-up train bus from the at least one slave node to the master node and in response to receiving the master test packet, a slave test packet containing the address of the at least one slave node on the back-up train bus; indicating an occurrence of a failure of communication on the back-up train bus between the master node and the at least one slave node when no slave test packet is received by the master node via the back-up train bus, or when the slave test packet received via the back-up train bus contains an incorrect address of the at least one slave node on the back-up train bus, otherwise indicating occurrence of no failures on the back-up train bus; and disconnecting the primary train bus from the master node and the at least one slave node and thereafter communicating between the master node and the at least one slave node via the back-up train bus when said indicating steps determine an occurrence of a failure on the primary train bus and no failures on the back-up train bus.
3. An apparatus for monitoring and switching over from a primary train bus to a back-up train bus in a serial network having a master node and at least one slave node, the primary train bus and the back-up train bus each serially interconnecting the master node and the at least one slave node, the master node and the at least one slave node having respective addresses on the primary train bus and the backup train bus, addresses of slave nodes on the primary and the backup train bus being accessible to the master node, comprising: first failure indicating means for indicating during communication on the primary train bus an occurrence of a failure on the primary train bus; periodic sending means for periodically sending on the back-up train bus from the master node to each of the slave nodes, a master test packet containing the address of the master node on the back-up train bus; sending means for sending on the back-up train bus from the at least one slave node to the master node and in response to receiving the master test packet, a slave test packet containing the address of the at least one slave node on the back-up train bus; second failure indicating means for indicating an occurrence of a failure on the back-up train bus between the master node and the at least one slave node if no slave test packet was received by the master node via the back-up train bus, or if the slave test packet received via the back-up train bus contains an incorrect address of the at least one slave node on the back-up train bus, else indicating occurrence of no failures on the back-up train bus; and means for disconnecting the primary train bus from the master node and the at least one slave node and thereafter communicating between the master node and the at least one slave node via the back-up train bus when said first and second indicating means indicate an occurrence of a failure on the primary train bus and no failures on the back-up train bus.
CROSS REFERENCE TO RELATED APPLICATIONS This application is a continuation of application Ser. No. 07/853,250, filed Mar. 18, 1992, now abandoned.
SUMMARY OF THE INVENTION An object of the invention is to provide a method of monitoring a back-up train bus in a redundant trainline monitor system and switching over from a primary train bus to a back-up train bus upon occurrence of a failure on the primary train bus, provided the back-up bus is functional.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view of train and its associated trainline monitor (TLM) system in which the invention finds particular use.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to FIG. 1, there is shown a Trainline Monitor (TLM) System 120 in which the invention finds particular use. FIG. 1 shows a representative train 112 with a head car 114, a tail car 116, and middle cars 118. Only two middle cars 118 are shown, however, a typical commuter train may have from one to ten middle cars 118 having essentially the same equipment on board.
Patentzitate Zitiertes PatentEingetragen Ver�ffentlichungsdatum Antragsteller TitelUS42453442. Apr. 197913. Jan. 1981Rockwell International CorporationProcessing system with dual busesUS452727117. Aug. 19822. Juli 1985The Foxboro CompanyProcess control system with improved fault isolationUS491263324. Okt. 198827. M�rz 1990Ncr CorporationHierarchical multiple bus computer architectureUS49673441. M�rz 198830. Okt. 1990Codex CorporationInterconnection network for multiple processorsUS508649923. Mai 19894. Febr. 1992Aeg Westinghouse Transportation Systems, Inc.Computer network for real time control with automatic fault identification and by-passUS521075626. Sept. 199011. Mai 1993Honeywell Inc.Fault detection in relay drive circuitsUS524752227. Nov. 199021. Sept. 1993Digital Equipment CorporationFault tolerant busNichtpatentzitateReferenz1Draft DIN 43322 German Standard specification, Parts 1, 2, 4 and 5 dated Jun. 1988 and Part 3 dated Jul. 1988, Parts 1 5 in English and Part 3 in German also.2Draft DIN 43322 German Standard specification, Parts 1, 2, 4 and 5 dated Jun. 1988 and Part 3 dated Jul. 1988, Parts 1-5 in English and Part 3 in German also.3ISO 4335, Third Edition, "Information Processing Systems Data Communication--High-Level Data Link Control Elements of Procedures," International Organization for Standarization, Jan. 8, 1987.4ISO 4335, Third Edition, Information Processing Systems Data Communication High Level Data Link Control Elements of Procedures, International Organization for Standarization, Jan. 8, 1987. Referenziert von Zitiert von PatentEingetragen Ver�ffentlichungsdatum Antragsteller TitelUS568248420. Nov. 199528. Okt. 1997Advanced Micro Devices, Inc.System and method for transferring data streams simultaneously on multiple buses in a computer systemUS571785213. Juni 199610. Febr. 1998Hitachi, Ltd.Multiple bus control method and a system thereofUS574285123. Mai 199621. Apr. 1998Nec CorporationInformation processing system having function to detect fault in external busUS580926126. M�rz 199715. Sept. 1998Advanced Micro Devices, Inc.System and method for transferring data streams simultaneously on multiple buses in a computer systemUS590234130. Okt. 199611. Mai 1999Scientific-Atlanta, Inc.Method and apparatus to automatically generate a train manifestUS609813725. Juni 19971. Aug. 2000Computer CorporationFault tolerant computer systemUS62826699. Jan. 199828. Aug. 2001Yamatake-Honeywell Co., Ltd.Ethernet communication redundancy methodUS632128623. M�rz 200020. Nov. 2001Compaq Computer CorporationFault tolerant computer systemUS647714021. Mai 19995. Nov. 2002Yazaki CorporationMultiplex communications systemUS653254615. M�rz 200211. M�rz 2003Compaq Information Technologies Group, L.P.Computer system for dynamically scaling busses during operationUS659810623. Dez. 199922. Juli 2003Lsi Logic CorporationDual-port SCSI sub-system with fail-over capabilitiesUS68540726. Juni 20018. Febr. 2005Continuous Computing CorporationHigh availability file server for providing transparent access to all data before and after component failoverUS686806728. Juni 200215. M�rz 2005Harris CorporationHybrid agent-oriented object model to provide software fault tolerance between distributed processor nodesUS702070930. Juni 200028. M�rz 2006Intel CorporationSystem and method for fault tolerant stream splittingUS742464031. Aug. 20049. Sept. 2008Harris CorporationHybrid agent-oriented object model to provide software fault tolerance between distributed processor nodesUS752266221. M�rz 200721. Apr. 2009Canon Kabushiki KaishaElectronic device including image forming apparatusUS786111030. Apr. 200828. Dez. 2010Egenera, Inc.System, method, and adapter for creating fault-tolerant communication busses from standard componentsUS82604878. Jan. 20084. Sept. 2012General Electric CompanyMethods and systems for vital bus architectureCN101330421B23. Mai 200818. Mai 2011Toshiba KkTransmission system for rail vehiclesEP1067036A16. Juli 200010. Jan. 2001DaimlerChrysler AGCommunication and control system for railbound vehiclesEP1995148A123. Mai 200826. Nov. 2008Kabushiki Kaisha ToshibaTransmission system for rail vehicles using two redundant bus systemsWO2004004180A127. Juni 20038. Jan. 2004Harris CorporationSoftware fault tolerance between nodesWO2010016985A12. Juli 200911. Febr. 2010General Electric CompanySystem, method, and computer software code for providing an auxiliary communication path when a primary communication path is unavailableDrehenOriginalbildGoogle-Startseite - Sitemap - USPTO-Bulk-Downloads - Datenschutzerkl�rung - Nutzungsbedingungen - �ber Google Patente - Feedback gebenDaten bereitgestellt von IFI CLAIMS Patent Services.© 2012 Google