If the coincidence is present, {HEAD ~ the mobile device} changes {TAIL ~ the own link identification code} so that the communication with the immobile device may be executed by using the changed link identification code 
changes
If the coincidence is present , { HEAD ~ the mobile device } changes { TAIL ~ the own link identification code } so that the communication with the immobile device may be executed by using the changed link identification code
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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