Cooperative GPS positioning with peer-to-peer time assistance

Ronga

et al. 2015

IEEE Commun. Mag.

Self Cite

The future pervasive communication ecosystem can improve and enhance the quality of our everyday lives by increasing comfort and safety perception, and improving interaction and conditions of activities: remarkable quality and performance will be afforded by the synergistic use of communication, positioning, and monitoring techniques, provided by means of meshed heterogeneous architectures based on satellite and terrestrial segments. In such a scenario satellite communication will represent the missing link of the evolution of services. This article aims to describe a flexible architecture that could be adopted in the future system and discussing the open points in the development of the system as well as of its single building blocks. SATELLITE COMMUNICATIONS AND NETWORKINGEnrico POTENTIAL APPLICATION SCENARIOSThe flexibility and reconfigurability features of the proposed architecture, described in the next section, can support a large variety of services for different potential application contexts. Although already existing services may not be able to exploit all the functionalities provided by the architecture, new advanced services can be developed relying on their integration. Some examples are reported in the following. E-HEALTH AND WELL BEINGThe proposed architecture can provide solutions to some of the main problems related to the management of many patients in a care environment (hospital, rehabilitation structure, etc.) during all the different care phases and to the remote care of convalescent or home patients (for diseases such as diabetes and hypertension). The patient can be assisted "transparently" at any time through adaptive interactions between smart objects (sensors, drugs, doctors' terminals, patients, relatives, and pharmacies) that have received suitable localization and context information: the monitoring of some main parameters allows immediate assistance in case of necessity or if access to specified building areas is aided or blocked based on established relations helping the necessary patient mobility. The transparency to the user, flexibility, and cooperation between the patient, the objects, and the network are of utmost importance in the disease context and can be specifically tailored to the assistance of patients affected by specific problems or pathologies (e.g., wandering dementia). The specific operational modalities of the platform (user-oriented, object-driven, and network/context-enabled) can provide suitable solutions to the different applications.Another widespread field of interest that can be addressed by the proposed architecture is well-being systems and sport activities: in particular, people practicing a sport can share information about their activities and experiences while also being connected and monitored by means of wearable devices.The specific services for these scenarios are summarized in Fig. 2. PUBLIC SAFETYEvery member of a rescue or safety team is equipped with a portable radio transceiver, with advanced integrated navigation/ communication (...

Section: Localizationmentioning

confidence: 99%

Flexible heterogeneous satellite-based architecture for enhanced quality of life applications

Re¹,

Ronga

et al. 2015

IEEE Commun. Mag.

Self Cite

“…With respect to and , the present work provides a new and wider set of results in addition to a general assessment of all the cooperative positioning features, which are evaluated in terms of satellite signal acquisition, computational load in the acquisition procedure, and performance concerning receiver position accuracy and time‐to‐first‐fix (TTFF). The tests involve two scenarios: outdoor‐to‐indoor (O2I) and outdoor‐to‐outdoor (O2O).…”

Section: Introductionmentioning

confidence: 99%

Peer‐to‐peer cooperation for GPS positioning

Martinelli

2016

Satell Commun Network

Self Cite

SUMMARYThis paper presents a peer-to-peer cooperative positioning technique together with its performance assessment. The cooperation between the two GPS receivers is realized by means of a wireless LAN connection and is significantly influenced by the accurateness of the synchronization between the two terminals. Both the outdoorto-indoor and outdoor-to-outdoor scenarios are considered. For each scenario, we assess the satellite signal acquisition and its computational load and the performance in terms of position accuracy and time-to-first-fix of the positioning procedure.

“…PDR techniques are one of the big navigation challenges since they would enable navigation systems to rely more on body-worn sensors and less on external infrastructures such as GPS system [9].…”

Section: Introductionmentioning

confidence: 99%

Daily Living Movement Recognition for Pedestrian Dead Reckoning Applications

Martinelli

Mobile Information Systems

2016

Self Cite

Nowadays, activity recognition is a central topic in numerous applications such as patient and sport activity monitoring, surveillance, and navigation. By focusing on the latter, in particular Pedestrian Dead Reckoning navigation systems, activity recognition is generally exploited to get landmarks on the map of the buildings in order to permit the calibration of the navigation routines. The present work aims to provide a contribution to the definition of a more effective movement recognition for Pedestrian Dead Reckoning applications. The signal acquired by a belt-mounted triaxial accelerometer is considered as the input to the movement segmentation procedure which exploits Continuous Wavelet Transform to detect and segment cyclic movements such as walking. Furthermore, the segmented movements are provided to a supervised learning classifier in order to distinguish between activities such as walking and walking downstairs and upstairs. In particular, four supervised learning classification families are tested: decision tree, Support Vector Machine,k-nearest neighbour, and Ensemble Learner. Finally, the accuracy of the considered classification models is evaluated and the relative confusion matrices are presented.