The assisted GNSS boomed up location based services

Authors:
Zhongliang Deng;Dejun Zou;Jianming Huang;Xu Chen;Yan Pei Yu
Affiliations:
School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, P. R. China;School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, P. R. China;School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, P. R. China;School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, P. R. China;School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, P. R. China
Venue:
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Year:
2009

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Abstract

The Location based services (LBS) are become increasingly important on telecommunication applications. Many LBS methods have been developed. Mobile station location technologies, including Cell-identification (CI), Enhanced Observed Time Difference (E-OTD), Observed Timed Difference of Arrival (OTDOA), and other third Generation (3G) location technologies, are evaluated in the paper. Above of all, the Assisted GNSS (A-GNSS) is analyzed to settle for emergency LBS. The technical advantages to widen AGPS to A-GNSS is developed to focus on the availability and accuracy of LBS. The architecture of software receiver for an integrated GNSS/UMTS is presented to meet the important requirements of seamless indoor/outdoor navigation and communication capability for emergency LBS. The principle platform of an integrated GNSS/GSM/CDMA based on the structure of " Single RF+PC" is implemented. By collecting and processing actual GPS data, the receiver is able to perform PVT calculations with high accuracy and rapid positioning.