WLCp1-06: A Field Study on Terrestrial and Satellite Location Sources for Urban Cellular Networks

Abstract

This work presents a statistical field study of the availability of time sources for location in a true wireless network. Terrestrial (base stations) and satellite (GPS) sources were investigated in three different urban scenarios. The density function of a specific number of sources available for triangulation is presented along with other statistical data in order to assess coverage. Since the fusion of terrestrial and satellite sources to obtain the location in wireless networks has been proposed as a way of improving coverage, the joint density function and cross-correlation between the availability of both types of sources are also presented. This correlation depends on the scenario, leading to the conclusion that the improvement obtained through the fusion of sources depends on both the fusion type and the scenario.

Performance Evaluation of Middleware for Provisioning LBS in Cellular Networks

“…The scenario defines a default number of 5 satellites in sight. However, in indoor zones, this figure is uniformly distributed from 1 to 2 satellites [20]. All features of MILCO are implemented: cost function and input modules.…”

A field study on the fusion of terrestrial and satellite location methods in urban cellular networks

“…This section addresses this issue and provides updated data concerning the availability of GPS satellites and GSM/GPRS base stations for the same common scenarios and positions. All the measurements presented were performed in Paris, France under the aegis of the 5th FP IST EMILY project [17]. The terrestrial network implemented E-OTD, while A-GPS was used as the satellite-based technique.…”

Modelos para el análisis y optimización del control de admisión en redes celulares.

“…Sin embargo, se pueden emplear esquemas que mejoren ampliamente la localización de los terminales dentro de una célula, lo cual permite aportar mejoras en la predicción de movimiento. Los esquemas que permiten localizar un terminal móvil dentro de una célula pueden dividirse en dos categorías [MEBM06]:…”