A method for any processor to reconstruct a network topology between nodes, the method comprising: calculating a distance between a second node, which is one of lower nodes of an arbitrary first node, and an upper node of the first node; Calculating a number of neighboring nodes of the second node that can be connected to two nodes, and selecting the second node as a backup node of the first node in consideration of the distance and the number; And storing information of the selected backup node in the first node.
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