Patent ID: 7359696

Claim:
A communication apparatus, comprising: an identification information request receiver configured to conduct wireless communication a plurality of times without interruption with a portable device, to set a minimum duration of an identification information request receiving state as a first period, to set a minimum duration of connection request receiving state as a second period, to set a sum of the first and second periods as a third period, to periodically receive an identification information request from said portable terminal during a period not shorter than the first period and not longer than three times the first period, wherein each period of transmission of the identification information request from the portable terminal is not shorter than the third period and not longer than three times the third period; a response transmitter configured to send a response signal including terminal information to said portable terminal when said identification information request receiver has received the identification information request; a connection request receiver configured to periodically accept a connection request from said portable terminal during a period not shorter than the second period and not longer than three times the second period, wherein each period of transmission of the connection request from the portable terminal is not shorter than the third period and not longer than three times the third period; a link connection establishment unit configured to establish a wireless link with said portable terminal when said connection request receiver has received the connection request; and an execution controller configured to control an execution apparatus for executing a prescribed operation after said link connection establishment unit has established the wireless link.