The mobile device 1 receives {HEAD ~ a message data channel signal} from {TAIL ~ the immobile device} 2 at step 710, and checks at step 720 whether it is a release command 
The mobile device 1 receives { HEAD ~ a message data channel signal } from { TAIL ~ the immobile device } 2 at step 710 , and checks at step 720 whether it is a release command
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH