Local wireless positioning system

Ubiquitous mobile computing is a new and very interesting research topic with wide applicability in context-aware solutions and position-dependent provided services. One of the most significant elements of context-awareness in ubiquitous environments is mobile device localization. There have been a number of attempts to design systems for indoor localization using different wireless sensing techniques, although currently there is no conclusive method for this purpose. There is also a list of issues that prevent from obtaining a good positioning accuracy which are not often addressed by other articles. Therefore, this paper presents a set of test cases and experimental results for wireless local positioning systems based on radio signal strength in order to emphasis their issues and challenges.