Implementation of On-Demand Indoor Location-Based Service Using Ad Hoc Wireless Positioning Network

WiFi-based localization is a promising candidate of indoor localization. In this paper, we present a distributed localization system using a WiFi ad-hoc wireless positioning network (AWPN) to realize on-demand location-based services. The AWPN is a WiFi mesh network with the capability of localizing WiFi devices. Using the AWPN, we can easily build a localization infrastructure by putting WiFi APs. To realize on-demand location-based services, we tackle two challenges: reduction in the installation cost of the user application and reduction in network traffic. We design a localization system using the AWPN and realize an on-demand location-based service as a Web service, which enables us to use via Web browsers. Our localization system is built on WiFi APs and distributes network traffic over the network. The experimental evaluations show that our localization system can localize a user device within 220 milliseconds. We also performed simulations and reveal that our localization system reduces network traffic by up to 24% than that in the centralized localization system.