Patent
Synchronizer for a fault tolerant multiple node processing system
Alan Matthew Finn,Roger M. Kieckhafer,Chris J. Walter +2 more
- 15 Apr 1987
145
TL;DR: In this paper, a synchronizer for each node in a multiple node processing system having a message interface for receiving sync and pre-sync time-dependent message, counter means for generating a local time, a time stamp memory having an entry for every node in the multiple-node processing system, and a time stamper responsive to receiving a time dependent message from a node for storing the local time in the entry of said time stamp for that node to generate a time stamps.
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Abstract: A synchronizer for each node in a multiple node processing system having a message interface for receiving sync and pre-sync time-dependent message, counter means for generating a local time, a time stamp memory having an entry for each node in the multiple node processing system, a time stamper responsive to receiving a time-dependent message from a node for storing the local time in the entry of said time stamp memory for that node to generate a time stamp. The synchronizer has a time stamp voter for generating a medial time stamp value from all the time stamps in the time stamp memory, a sync correction generator for generating a sync delta having a value corresponding to the difference between the voted time stamp and the node's own time stamp, means for adding said sync delta to a nominal transmission timing interval to generate an actual transmission timing interval, and a message generator for generating a pre-sync time dependent message passed to the transmitter at the end of the nominal transmission timing interval and for generating a sync time-dependent message passed to the transmitter at the end of said actual transmission timing interval.
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Citations
Patent
System and method for synchronizing operations among a plurality of independently clocked digital data processing devices
Nicholas A. J. Millington
- 02 Jul 2004
TL;DR: In this paper, a system for maintaining synchrony of operations among a plurality of devices having independent clocking arrangements is described, where each task is associated with a time stamp that indicates a time, relative to a clock maintained by the task distribution device, at which group members are to execute the task.
663
Patent
Operations controller for a fault tolerant multiple node processing system
Chris J. Walter,Roger M. Kieckhafer,Alan Matthew Finn +2 more
- 15 Apr 1988
TL;DR: In this paper, a fault tolerator for an operations controller of a multiple-node fault tolerant processing system has been proposed, which includes an error file for storing the content of all received inner node error reports, an error handler for generating a base penalty count for each node based on the contents of the errors recorded in the error file and for excluding each node from the operation of the multiple node processing system whose base penalty counts exceeds an exclusion threshold.
208
Patent
User Interfaces for Controlling and Manipulating Groupings in a Multi-Zone Media System
Robert A. Lambourne,Nicholas A. J. Millington +1 more
- 31 May 2013
TL;DR: In this paper, a user interface is provided to allow a user to group some of the players according to a theme or scene, where each player is located in a zone and when the scene is activated, the players in the scene react in a synchronized manner.
204
Patent
Apparatus and method for synchronizing execution of programs in a distributed real-time computing system
Masahiko Saito,Gul Agha +1 more
- 26 Oct 1995
TL;DR: In this article, a distributed computing system including a plurality of computers, where the execution of programs by the computers to perform real-time tasks are synchronized with each other, is presented.
200
Patent
Distributed computing environment using real-time scheduling logic and time deterministic architecture
Randy D. Woods,Wayne P. Dupree,David M. Jachim,Gerrit H. Verniers,Stephen G. Churchill,George P. Fernandez +5 more
- 19 May 1999
TL;DR: In this paper, a system for a plurality of computer nodes in mutual data communication to execute logic in a coordinated manner is presented, which aligns the definition of the time in the nodes so that each node has essentially the same definition of time; defining a schedule of communications for each computer node, with the schedule having future moments defined for initiating each communication; communicating each schedule to its respective node; and initiating each communications at the time defined in the schedule.
193
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Patent
Extra stage cube
George B. Adams,Howard Jay Siegel +1 more
- 23 Dec 1982
TL;DR: In this paper, a multistage data routing system for routing a plurality of data streams comprises a cube comprising a multiplicity of stages sequentially numbered n-1 through 0 and an extra stage n situated to proceed n- 1 of the cube.
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Patent
Store and forward facility for use in multiprocessing environment
Joseph A. Bednar,Richard L. Bennett,Charbak R. Dutt,Michael K. Stafford +3 more
- 13 Apr 1983
TL;DR: In this article, a store and forward facility for use in a multiprocessing, multinode environment is disclosed wherein two fundamental processes (transfer and delivery) perform the bulk of the activities required in this facility.
82