关键词：无线传感器网络；三维；传感器节点；硬件约束
摘 要：A wireless sensor network (WSN) is categorized as three-dimensional (3D) when the variation in the height of deployed sensor nodes is not negligible as compared to length and breadth of deployment field. Localization is one of the fundamental components of any wireless sensor application. A localization algorithm estimates the position of a node by using information provided/inferred from anchor beacons, reference nodes or neighbors connectivity. The effectiveness of a localization algorithm is usually determined in terms of accuracy, resilience to node failure, computational cost, messaging overhead, hardware constraints and deployment practicality. This survey overviews the major recent work done in the field of localization in 3D WSNs. The major contribution of this work is to present all the major 3D (generic, airborne, terrestrial and submerged) localization schemes in a single literature along with their relative strengths and weaknesses.