LBS (Location Based Services)

The AT@LBS command is used for auxiliary positioning.

The auxiliary positioning function consists of the following two Parts:

• Part 1: The terminal collects the auxiliary positioning information and reports it to the backend server.

• Part 2: The backend server performs calculations based on the received auxiliary positioning information to obtain the positioning point.

  Regarding Part 1, it is realized by the terminal, while Part 2 is realized by the backend server.

Note

For the reporting of auxiliary positioning information, it is recommended to preset the ‘Data ID’ related to the auxiliary positioning information into Record 50H. The related Data ID(s):

• Data 100 (Wi-Fi Hotspot)

Example:
AT@LBS=gl601###,,1,,,,,012F$
+ACK:LBS,123456789012345,C031,10,0,,012F,20210407101530,1234$
AT@LBS?gl601###,,0C37$
+QRY:LBS,123456789012345,C031,10,0,1,1,,1,,,,,0C37,20210407101530,1234$

Parts	Fields	Length (Byte)	Range/Format	Default
Head	Header	3	AT@	AT@
	Command Word	3	LBS	LBS
	Leading Symbol	1	=	=
	Password	8-16		gl601###
Body	Reserved	0
	Mode	1	0, 1, 2	0
	Reserved	0
	Reserved	0
	Reserved	0
	Reserved	0
Tail	Sequence Number	4	0000-FFFF (‘0’-‘9’, ‘A’-‘F’)
	Tail	1	$	$

• Mode

  Specify the working mode of reporting the auxiliary positioning information.

  • 0 - Disable. The auxiliary positioning information will not be reported, that is, the data length of the ‘Data ID’ related to the auxiliary positioning information is always 0.

  • 1 - Enable when GNSS positioning fails. Only when the GNSS positioning fails, the data length of the ‘Data ID’ related to the auxiliary positioning information in the message is not 0, otherwise, it is 0.

  • 2 - Enable always. Regardless of whether the GNSS positioning is successful or failed, the data length of the ‘Data ID’ related to the auxiliary positioning information in the message is not 0.