Chapter 12 – Postion Determination (GPS) Commands
Multi-Tech Systems, Inc. CDMA Wireless AT Commands (PN S000294J)
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Position Determination Fix Rate +WPDFR
Description:
This command specifies the position determination session fix rate. This setting is used in tracking sessions
only and specifies the number and interval for the unsolicited position data responses (+WPDSS). The
default value for the +WPDFR parameters is zero. The appropriate parameters must be set prior to starting
a PD tracking session.
Values:
<num>
Number of fixes. Valid range is 0 to 400.
<time>
Time between fixes in seconds. Valid range is 0 to 1800.
Syntax:
Command syntax:
AT+WPDFR=<num>,<time>
Command
Possible responses
AT+WPDFR=?
Note: Display valid parameter ranges.
+WPDFR: (0-400),(0-1800)
OK
AT+WPDFR?
Note: Display current settings.
+WPDFR: 10,100
OK
AT+WPDFR=10,100
Note: Specify 10 fixes with 100 seconds between fixes
OK
Note: Command accepted.
Position Determination Privacy Level +WPDPL
Description:
This command is used to set the position determination session privacy level. The privacy level is used to
control what mobile station position information is made available to the PDE during a PD session.
Values: <level>
0
Low (no restrictions) – Permits sending of pilot phase measurements, GPS pseudo-ranges, and MS
position information to the PDE.
1
Medium – Pilot phase measurements can be sent to the PDE. Disables sending of MS position
information and GPS pseudo-ranges. Allows only MS-based position calculated fixes. Allows AFLT-
only MS-assisted fixes.
2
Highest – No information that could be used to locate the mobile will be sent to the PDE. Allows only
MS-based position calculation fixes. Disables PDE-based position calculation/MS-assisted fixes.
Note:
If the MS is in emergency mode (e911), the module will provide all available position data (level 0) when
requested by the PDE.
Syntax:
Command syntax:
AT+WPDPL=<level>
Command
Possible responses
AT+WPDPL=?
Note: Display valid parameter range.
+WPDPL: (0-2)
OK
AT+WPDPL?
Note: Display current setting.
+WPDPL: 0
OK
AT+WPDPL=2
Note: Select highest level of security.
OK
Note: Command accepted.
Position Determination NV Privacy Level +WPPRV
Description:
This command is used to specify the NV Privacy level for the position determination session. This setting
controls how the PD session responds to PDE originated location requests. The new value is committed to
NV and is persistent following a module power cycle.
Values:
<level>
0
Lowest level of privacy. The module puts no restrictions on position data shared with the network.
(Default)
1
Medium level of privacy. The module will only perform mobile based position fixes, PDE based fixes are
disallowed. Mobile terminated sessions not are allowed, except E911 position fixes.
2
Highest level of privacy. The module will not send any information to the network that could allow the
network to estimate the current user location. Note that depending on the level of PDE sophistication,
this could impede the module's GPS performance. The module will only perform mobile based position
fixes, PDE based fixes are disallowed. Mobile terminated sessions not are allowed, except E911
position fixes.
Syntax:
Command syntax:
AT+WPPRV=<level>
Command
Possible responses
AT+WPPRV=?
Note: Display valid parameter range.
+WPPRV: (0-1)
OK
AT+WPPRV?
Note: Display current setting.
+WPPRV: 0
OK
AT+WPPRV=1 Note: Set to medium privacy level OK Note: Command accepted.