Research on Locating Unit Initial Sensitivity

Getting location information of an unknown mobile node is a key point of locating service in the ubiquitous computing environment. The errors due to locating an triangular domain is studied. And the following fact was found: the locating accuracy can be greatly improved by taking equilateral triangles as the fundamental locating unit. Based on the finding, a new physical property parameter of coverage, coverage base, is defined and introduced for the first time. And, the distribution issue between locating units is also studied, as a result, the theorem of coverage base about distribution of locating unit is proposed in minimum error condition. The simulation tests indicate that the locating unit initial sensitivity theorem (LUIS) can meet the requirement of ubiquitous terminal's real-time localization and possesses the preferable localization precision.