Abstract
Directional antennas are used for mobile ad hoc networks (MANET) to improve network security, capacity and energy efficiency. In this paper, we propose an unaided directional neighbor discovery (UADND) algorithm for directional transmission and reception in MANET. With UADND, network nodes could independently find neighbors that can be reached only when both of transmission and reception are directional. Additional information provided by GPS or other methods, such as node position or synchronization information utilized by other neighbor discovery algorithms is not necessitated in UADND. The proposed algorithm uses the geometrical relationship between the communication range of DT (directional transmission only) mode and the communication range of DTR (directional transmission and reception) mode to discover DTR neighbors. Cross layer design is used in UADND to integrate directional neighbor discovery with MANET routing, and thus making UADND a scenario-adaptive neighbor discovery algorithm. Simulations show that UADND is efficient in overhead and energy saving.
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