As shown in FIG 2B, when {HEAD ~ an electronic device} 300 is near {TAIL ~ any road side data exchange device} 210, the electronic device 300 may receive the analyzed result data Ar to achieve the effect of calibrating the GPS signal to have more precise satellite positioning 
is near
As shown in FIG 2B , when { HEAD ~ an electronic device } 300 is near { TAIL ~ any road side data exchange device } 210 , the electronic device 300 may receive the analyzed result data Ar to achieve the effect of calibrating the GPS signal to have more precise satellite positioning
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH