110
2.17
GPS
These communications services are used on models equipped with WHE6.5 Pro.
2.17.1
Function summary
Latitude and longitude data are obtained using independent positioning and A-GPS.
(1) GPS functions specifications
Item Specification
Description
Independent positioning
Module unit receives GPS radio waves and
performs positioning
Positioning
method
A-GPS positioning
GPS positioning uses the support of cellphone
base stations.
With reception from 4 or more
satellites: 3D positioning
Positioning
status
With reception from 3 satellites:
2D positioning
Positioning cannot be performed with 2 or
fewer receivable satellites
Output
format
NMEA
－
0183
This is the standardized output format of the
National Marine Electronics Association, and is
the standard format used with GPS.
Geodetic
system
WGS84
[A-GPS function]
This function links with cellphone base stations to perform GPS positioning processes. There are
the following 2 modes.
i MS-based
In this mode, the terminal gets data such as Ephemeris Data and Almanac Data from base
stations to perform positioning.
ii MS-assisted
In this mode, the base station performs positioning on the basis of GPS wave information
received by the terminal.
Also, there are the following two types of communication with cellphone base stations.
ⅰ
C-Plane: The control signal channel of the cellphone is used for communication.
ⅱ
U-Plane (SUPL): The IP address of the cellular network is used for communication.
A-GPS functions are supplementary to GPS functions, and cannot provide positioning where there
is no GPS wave reception.
(2) A-GPS support by each model
Model MS-based
C-Plane
MS-based
SUPL
MS-assisted
C-Plane
MS-assisted
SUPL
IT-G500
(Overseas model)
Can be set
Can be set
Can be set
Can be set
