Trimble Inc. TRIMTRAC1 Benutzerhandbuch

 

DRAFT TrimTrac Locator Technical Manual      27 

1.  FIX state; OR 

2.  IDLE State 

Upon entering the STATUS state, the TrimTrac locator will: 

1.  Collect the latest status information, including battery levels; 

2.  Store latest status and position information into appropriate report 

structures; and 

3.  Reset motion detection logic. 

Upon completion of these tasks, the TrimTrac locator will transition from the 
STATUS state to the TRANSMIT state. 

Upon entering the TRANSMIT state from the STATUS state, the TrimTrac 
locator will: 

1.  Power up the GSM hardware; 

2.  Start the TRANSMIT countdown timer, T3; 

3.  Attempt find a suitable 900, 1800 or 1900 MHz GSM network, establish 

SIM communication and register on the network; AND 

4.  If a suitable GSM network connection is made, transmit the latest 

available status and position information before the TRANSMIT 
countdown timer, T3, expires. 

The TrimTrac locator will transition from the TRANSMIT state whenever any of 
the following occurs: 

1.  The GSM protocol stack confirms that queued TrimTrac locator messages 

have been sent; OR 

2.  The TRANSMIT Timeout countdown timer, T3, expires; OR 

3.  Connection to the GSM network is lost prior. 

The TrimTrac locator will transition from the TRANSMIT state to either the 
IDLE, FIX, QUERY or DELAY states as follows: 

1.  To the IDLE state if: 

a.  The TRANSMIT Timeout countdown timer, T3, expires; AND 

b.  Expiration of the RTC Wakeup countdown timer, T1, caused the 

initial transition from the most recent IDLE state to the STATUS 
state. 

2.  To the FIX state if: 

a.  Motion Report is set to TRUE (“1”); AND