Enabling landmark-based accurate and robust next generation indoor LBSs.

A WiFi-based landmark (LM) is a unique point in the physical space that has a repeatable and identifiable WiFi signature as sensed by a mobile device. We present Lighthouse, a new class of WiFi landmarks based on concepts from computational geometry theory that can be leveraged to provide robust and accurate location based services (LBSs). Our experimental results show that Lighthouse's landmarks are one order of magnitude more frequent in the environment compared to the other state-of-the-art WiFi-based landmarks. In addition, the median accuracy of determining the LMs location is 3.4 meters which is robust under different conditions; highlighting the promise of Lighthouse landmarks for enabling the next generation LBSs.