Base station location method based on AT instructions in GSM network
A GSM network and base station positioning technology, which is applied in the field of base station positioning under the GSM network based on AT commands, can solve the problems of large error and limited application, and achieve the effect of simple operation and wide application
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[0023] Step 1: Obtain the cell information through the AT command AT+CCED=0, 2, 0 in the command means only query once, 2 means the information of the attached cell, and query the latitude and longitude position coordinates of n base stations in the cell;
[0024] At present, in the Spreadtrum 6531 module, generally three to four base station information can be obtained, and information of up to six base stations can be obtained;
[0025] Step 2: Obtain the timing advance of the cell through the command AT+CCED=1, 4. In the command, 1 indicates the automatic query command, and 4 indicates the timing advance TA of each base station;
[0026] The time-division structure adopted by the GSM network requires that each user must correspond to the corresponding time slot, but the propagation of electromagnetic waves requires a certain delay, so it is necessary to transmit a certain time in advance, that is, the time advance amount TA;
[0027] Step 3: According to the formula Calcu...
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