Distributed Top-k query method oriented to Internet of things data
A query method, top-k technology, applied in the direction of network topology, advanced technology, electrical components, etc., can solve the problems of inaccurate query results, uneven energy consumption of nodes, ignoring energy consumption, etc., and achieve the effect of accurate query results
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[0082] Example 1:
[0083] Such as image 3 As shown, in this embodiment, it is assumed that there are 15 sensor nodes in total, image 3 (a) is the physical topology diagram of the node. The specific implementation steps for the selection of the dominant node are as follows:
[0084] (1) Node initialization: each node is initially a white unprocessed node, and assuming that each node has calculated the energy cost, the ID number is 10, 15, 21, 19, 17, 14, 18, 20, 18, 15,24,23,21,18,20.
[0085] (2) Cost information exchange: each node sends hello message packets and energy cost message packets to exchange cost information with its neighboring nodes. Specifically, if node v i Meet E Cost (v i ) Cost (NB(v i ))), then v i Become a dominant node, nodes 1, 10, and 14 all meet the conditions, so they become a black dominant node.
[0086] (3) Node status information broadcast: The black dominating node broadcasts dominating information to neighboring nodes. After the neighbor has not pr...
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