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Wireless sensor networks have the potential to become the future pervasive sensing technology. Large number of sensors and the major application scenario require manual location that may cause sensor position variation problem However, we need mechanisms to localize sensors randomly and control the correspondent movement. In such item, we propose in this paper a WSN policy using the peddling information for a centralized collection point to achieve a posterior localization and mobile entities history movement. By creating a position message exchange between sensor nodes we can trace the mobile trajectory. Results have been obtained by simulating a new geo-localization policy based on WSN.