HUAWEI MU609 HSPA LGA Module
Application Guide
GPS Application Scenarios
Issue 02 (2013-09-18)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
93
Positioning
methods
Description
Benefits
Drawbacks
XTRA
positioning
Downloads XTRA
data from the
Qualcomm's XTRA
server to assist
positioning. The
XTRA data is valid
for 7 days.
Reduces the
TTFF after cold
start.
Long valid
period for the
XTRA data,
eliminating
frequent data
downloading.
Cannot reduce the
TTFF after cold start
as significantly as
the A-GPS methods.
The XTRA data's
ability to assist
positioning declines
as time goes by.
Cell ID
Base station
mode, this
approach will be
based on the cell
ID number of the
mobile terminal is
located to
determine the
location of the
user
.
This mode can be
use when other
optioning
methods are
failed.
Very low accuracy.
Global
navigation
satellite
system
(abbreviated
as GNSS)
Uses both the GPS
and GLONASS for
positioning.
Using more
satellites,
increases the
successful
positioning rate
and the
positioning
accuracy.