The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 26, 2008
Filed:
Jul. 01, 2005
Mitsuyoshi Yasuda, Tokyo, JP;
Katsutoshi Itoh, Tokyo, JP;
Makoto Natori, Saitama, JP;
Minoru Yokoshi, Tokyo, JP;
Osamu Yoshimura, Kanagawa, JP;
Takeshi Itagaki, Tokyo, JP;
Mitsuyoshi Yasuda, Tokyo, JP;
Katsutoshi Itoh, Tokyo, JP;
Makoto Natori, Saitama, JP;
Minoru Yokoshi, Tokyo, JP;
Osamu Yoshimura, Kanagawa, JP;
Takeshi Itagaki, Tokyo, JP;
Sony Ericsson Mobile Communications Japan, Inc., Tokyo, JP;
Abstract
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 the portable terminal is limited. A short-range wireless communication facility of the portable terminal and the wireless communication apparatus move into a particular operation mode if communications do not occur therebetween at least for a predetermined time period. In monitoring the signal level of the wireless signal from the wireless communication apparatus in the particular operation mode, the portable terminal reduces a response speed at which to detect a signal level change. This causes the wireless communication apparatus to delay issuing a request for an increase in transmission power, thereby reducing unevenness of the working distance at which to alert a user to the unusual distance traveled between the two apparatuses or beyond which to limit the use of some functions of the portable terminal.