A portable terminal monitors a signal level of a short-range wireless signal from a wireless communication apparatus. If the signal level drops so low that a state of connection for short-range wireless communications cannot be maintained between the two apparatuses, use of predetermined functions of...http://www.google.com.au/patents/US7336929?utm_source=gb-gplus-sharePatent US7336929 - Short range wireless communication system, portable terminal apparatus, and wireless communication apparatus
