Abstract: In order to construct a secure and efficient service environment and make the user convenient to search re- source in the Internet of Things(IoT) , the paper proposed a novel service discovery method oriented to IoT based on the artificial potential field. Firstly, the concept of space service community was presented. I}hen the service acquire method SRDI3SM(service routing method based on space migration) was proposed. I3y the transmission characteristics of space node, SRDBSM can search the optimal node which is considered as next-hop node within the maximum effective trans- mission range. Theory analysis and experiments indicate that compared with random walk and modified-BFS, SRDI3SM has certain improvement in following aspects; reducing node energy consumption, prolonging the network space com- munity survival cycle and increasing the efficiency of resource discovery.

Key words: Internet of things, Spherical migration, Space-community, Service acquiring