— Cooperative systems in transportation can bring new intelligence for vehicles, roadside systems, operators and individuals by creating a communications platform allowing vehicles and infrastructure to share information. The performance of this underlying communication system has a major impact on the effectiveness of the emerging applications for… (More)
Although technology has not yet reached Weiser's predictions, progress to advance state-of-the-art in ubiquitous computing is well underway. In particular new software is being developed to implement intelligent environments that sense and adapt to changes in the physical environment and the user's task and context. Inside these smart worlds, doors open… (More)
In this paper, we describe the opportunistic localization, which enables localization services that works seamlessly in heterogeneous environments including indoors as oppose to GPS based outdoor-only systems.
—It is known that Particle Filter and Map Filtering techniques can be used to improve the performance of positioning systems, such as Pedestrian Dead Reckoning (PDR). In previous research on indoor navigation, it was generally assumed that detailed building plans were available. However, in many emergency / rescue scenarios, there may be only limited… (More)
Particle Filter (PF) techniques has been widely used in indoor localization systems. They are often used in conjunction with pattern matching based on Received Signal Strength Indication (RSSI) fingerprinting. Several variants of the particle filter within a generic framework of the Sequential Importance Sampling (SIS) algorithm have been described. The… (More)
Localization systems will evolve towards autonomous system which will use any useful information provided by mobile devices taking the hardware specification and environmental limitations into account. This paper demonstrates the concept of opportunistic localization using a smart phone with the following sensor technologies: Wi-Fi, GSM, GPS and two… (More)
— The rapid increase in the use of IEEE 802.11 Wireless Local Area Networks (WLAN) for a diverse range of applications, has introduced an increased complexity into WLAN design, as regards to accurate access point (AP) position assessment, which can severely impact the performance of large scale WLANs. This paper presents two approaches to WLAN design that… (More)
We present a novel, multimodal indoor navigation technique that combines pedestrian dead reckoning (PDR) with relative position information from wireless sensor nodes. It is motivated by emergency response scenarios where no fixed or pre-deployed global positioning infrastructure is available and where typical motion patterns defeat standard PDR systems. We… (More)