I am using SIM868(Assist GPS) module to get gps location vert fast(TTFF very less) ,whenever satellites are not in view (means in indoor also it needs to get data from server instead of satellites,why because in indoor we may not get minimum number of satellites view) then automatically it needs to download data(.EPO)from http server,with updated network time and EPO files it needs to update gps location accurately...(i am not getting fast gps data access,if it is in indoor)
Here my doubt, is how cell towers are communicating and how gsm getting data from cell towers,is there any separate procedure? how to get gps location data near by cell tower??
i am new to this technologies,please help me :( :( :( :(
Thank you in Advance