Patent ID: 7024463
Filing Date: 2006-04-04
Classification: G05B,H04L

Abstract:
1. A network system, wherein: logical names of data shared between a plurality of nodes connected to a network are defined; said shared data is stored in prescribed memory regions of memory portions of said nodes; correlation information correlated with said logical names and memory position information of said memory portions storing data corresponding to the logical names is stored in correlation information memory portions; transmission and reception of said shared data between said plurality of nodes are carried out based on said logical names and said correlation information; said correlation information is changed while processes of the nodes connected to said network are operated without interruption in the case where the state of a communication partner node changes and the change has an effect on said correlation information, and said correlation information is stored separately in an indirect reference table which stores memory position information used for accessing data stored in the memory portion, and a correspondence table having a correspondence with the memory position information inside said indirect reference table storing the logical names and the memory position information for the logical names.