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In the recent years, there is a growing interest in the design and deployment of sensor systems for applications of high-level inference, which leads to an increasing demand on connecting Internet Protocol (IP) network users to wireless sensor networks and accessing the available services and applications. In this paper, To overcome the shortcomings of existing P2P-based integrating architecture for wireless sensor networks, a novel three layers P2P-based integrating architecture for wireless sensor networks is proposed. It builds a bottom-up three layers network model for the sensor network: sensor nodes layer, gateway peers layer and super peers layer. The system's communication model is based on a P2P approach to lower communication complexity. For these reasons, the life cycle of wireless sensor networks is prolonged.