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Neighbor Discovery (ND) is a basic and crucial step for initializing wireless ad hoc networks. A fast, precise, and energy-efficient ND protocol has significant importance to subsequent operations in wireless networks. However, many existing protocols have high probabilities to generate idle slots in their neighbor discovering processes, which extends the executing duration, and thus compromises their performance. In this paper, we propose a novel randomized protocol PHED, Pre-Handshaking Neighbor Discovery Protocol, to initialize synchronous full duplex wireless ad hoc networks. By introducing a pre-communication strategy to help each node be aware of activities of its neighborhood, we significantly reduce the probabilities of generating idle slots and collisions. Moreover, with the development of single channel full duplex communication technology [1, 2], we further decrease the processing time needed in PHED, and construct the first full duplex neighbor discovery protocol. Our theoretical analysis proves that PHED can increase the speed of ND by approximately 98% in comparison with the classical ALOHA-like protocols [3, 4]. In addition, we prove the effectiveness of PHED by simulations.

PHED: Pre-Handshaking Neighbor Discovery Protocols in full duplex wireless ad hoc networks