System and method that prevent messages transferred among networked data processing systems from becoming out of sequence
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jan 23, 2001
Grant Date -
N/A
app pub date -
Mar 10, 1997
filing date -
Mar 11, 1996
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Data processing systems, each belonging to one of a number of program groups, are connected to a network. Each group includes a data processing system containing a sequencer which determines the sequence of messages transferred over the network. The sequencer of each data processing system is either in the 'operation mode' or in the 'standby mode.' A sequencer in the standby mode declares the operation mode independently of other sequencers and sends this operation mode declaration to the sequencers of the other data processing systems. When the operation mode declaration is sent a number of times equal to a specified count, the sequencer becomes the operation mode sequencer. When the operation mode sequencer stops, some other standby mode sequencer takes over the function of the operation mode sequencer, thus maintaining consistency in the sequence of messages to be sent to a plurality of data processing systems connected to the network.
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