In wireless sensor networks（ WSNs）

topological characters of WSNs is important for application and optimization of designed network. Topological border is the basis of topological characters

it can be used directly

and WSNs bottlenecks identification and near convex segmentation algorithm are both rely on boundary information aquiring. Propose a distributed algorithm which is independent of geographic information to successfully identify WSNs boundary by rule of heat conduction of natural phenomena and natural characteristics of isotherm breaks off only on boundary for reference

in WSNs which is an artificial system simulate heat conduction process.