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GPRS Week Time tab
–
most GSM billing systems charge number of bytes (kilobytes)
transmitted per session. During the session, FM1000 makes connection and transmits data to a
server. FM1000 tries to handle the session as much as possible; it never closes session by itself.
Session can last for hours, days, weeks or session can be closed after every connection in certain
GSM networks
–
this depends on GSM network provider. GPRS Context Week Time defines
session re-establish schedule if session was closed by network. New GPRS context is opened if
time is 10 minutes till time checked in table. Therefore if all boxes are checked, FM1000 is able to
open new connection anytime. At scheduled time match FM1000 checks for GPRS session
activity. If GPRS session is alive, FM1000 sends data to server according to Send period
parameter. If it is not, FM1000 checks if it is able to re-establish the session.
Figure 21 GPRS Week Time configuration
Device checks if the time between last saved record and current time is equal or higher
than Time based acquire interval. If so, FM1000 saves record to memory. If not, FM1000 checks if
the distance from last record to current record is equal or higher than Distance based acquire
interval. If so, saves the record to memory. If not and speed is higher than 10km/h, then FM1000
checks if angle difference between last record and current record is equal or higher than Angle
based acquire value. If so, saves the record to memory. These checks are performed every
second.
Note: Keep in mind that FM1000 operates in
GMT:0
time zone, without
daylight saving.
FM1000 is able to collect records using three methods at the same time: time, distance and angle
based data acquisition: