Research on Spatial Location Unit Distribution Model in Pervasive Computing

How to obtain location information of an unknown node precisely is a key problem of locating service under ubiquitous computing environment. The paper proposes and proves the theorem of spatial location unit distribution model according to the analysis of the location error produced during location in the three-dimensional space. On this basis, the location unit selection (LUS) algorithm is proposed. The simulation results indicate that the location unit distribution model theorem and the location unit selection algorithm can meet the requirements of a ubiquitous terminal´s real-time location and possess a preferable precision in location.