In the event that a plurality of mobile devices use the same link identification codes, the immobile device requests the mobile devices to change {HEAD ~ the same link identification code} to {TAIL ~ different ones} among the mobile devices 
In the event that a plurality of mobile devices use the same link identification codes , the immobile device requests the mobile devices to change { HEAD ~ the same link identification code } to { TAIL ~ different ones } among the mobile devices
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH