Accurate Location Service for 3G Cellular Networks
Speaker: Dinesh Kumar-Mills, ITEE
When: 2004-12-01 11:00:00
Venue: 78-420
Host: John Homer
Abstract:Advances in wireless and geo-location technologies have given rise
to location based services that provide information with a
geographic relevance. The requirement for increasing the quality of
these services is maximising the accessibility of the
geo-location. The basis for the implementation of a geo-location
technology is its level of accuracy. The inherent qualities of GPS
and its broad range of applications and accuracies make it a viable
technology to focus on providing more accurate geo-location. A
highly accurate and precise application of the GPS technology is the
real time kinematics (RTK). The most advanced and proven
implementation of the RTK is the Virtual Reference Station (VRS)
network concept. Its requirement of bi-directional communications is
a critical disadvantage as this limits the robustness of the
system. High costs and coverage limitations are also associated with
the types of technology (i.e. UHF, GSM and GPRS) required for VRS
communications. The Virtual Reference Cell (VRC) approach can be
used to mitigate the disadvantages of the VRS network. This approach
generates corrections for a fixed number of cells that are broadcast
to the rovers. The drawback of the VRC system is a lower positioning
accuracy due to the use of DGPS corrections instead of RTK. In this
seminar I propose a novel RTK-VRC based system whereby advantages of
the VRC are maintained while achieving RTK level accuracy,
mitigating high communications costs and supporting kinematic
applications. The RTK-VRC system is an integration of the VRS
network, to provide RTK positioning, and the WCDMA wireless network,
to provide the cell structure and communications. For this system a
novel communications link will be implemented using the pilot
channel of the WCDMA network to minimise the communications costs.
Biography:Dinesh Kumar-Mills received a BE degree in Aerospace Avionics (Hons)
in 1999 from the Queensland University of Technology. In 2000 he
began working for Wireless Data Systems as a software engineer
developing software for wireless communications. Since March 2004 he
has been an MPhil student with the School of Information Technology
and Electrical Engineering at the University of Queensland.
Type: MPhil confirmation
Contact:John Homer, seminar host (homerj@itee.uq.edu.au)
or Guido Governatori (ITEE seminar co-ordinator)
(guido@itee.uq.edu.au)