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POSITIONING FEATURES 43
PART C: OPERATING THE SERAPH
After this, a position is sent, GPS is switched off and the de-
vice returns to normal operation.
The message includes a time stamp indicating age of the po-
sition.
Responding location history request
messages
The device responds the location history request this way:
It sends the latest position to the requesting number
imme-
diately
. The position sent is the very latest one found in the
device memory. The GPS stays in off-state: Position is NOT
refreshed.
In addition to the latest position, the device may send sev-
eral old positions (i.e. position history) with desired inter-
vals to the requesting number (most likely: the service
center number). If requested, the whole trace of the device
can be unravelled afterwards.
Network positioning support
The device can be requested to send its current GSM net-
work parameters at any time. Requesting number can be e.g.
service center. The message that the device sends as a re-
sponse is called the Network Measurement Report (NMR).
The device will send network parameters to the requesting
number automatically in these cases:
•Authorization is enabled and the requesting number is
authorized.
•Authorization is entirely disabled and the service center
number is NOT configured in the device.
Service center number and numbers stored as Authorized
numbers are always authorized. Emergency numbers are au-
tomatically authorized only during emergency mode (if the
emergency mode is configured to be terminated manually).
If the authorization is enabled and the position request
comes from an unauthorized number, the device will dis-
card the request.
If the service center number is defined and authorization is
disabled, the response is always sent to the service center
number.
The Network Measurement Report contains rough data and
the position needs to be separately calculated by taking into
account surrounding base stations and distances in between
them. Calculation of the position needs a separate server,
available from Benefon Partners. The device cannot calcu-
late the position based on network parameters by itself.
Содержание SERAPH NT
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Страница 56: ...APPENDIX 56 LIST OF MPTP COMMANDS AVAILABLE FOR BENEFON SERAPH ...