定位机制研究(Localization Almost all existing localization algorithms consist of two stages: -1)measuring geographic information from the ground truth of network deployment; 2)computing node locations according to the measured data. Geographic information i includes a variety of geometric relationships from coarse-grained neighbor-awareness to fine- grained inter-node rangings (e.g.,distance or angle)定位机制研究（Localization） • Almost all existing localization algorithms consist of two stages: – 1) measuring geographic information from the ground truth of network deployment; – 2) computing node locations according to the measured data. • Geographic information includes a variety of geometric relationships from coarse-grained neighbor-awareness to fine￾grained inter-node rangings (e.g., distance or angle)