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:
Jun. 25, 2002
Filed:
Mar. 08, 1999
Naofumi Adachi, Saitama, JP;
Teru Saitou, Tochigi, JP;
Akira Ootake, Tochigi, JP;
Yoshihito Takeshima, Tochigi, JP;
Ryouji Terada, Tochigi, JP;
Aiwa Co., Ltd., Tokyo, JP;
Abstract
This invention relates to a portable terminal equipment establishing synchronism with a control channel by intermittently receiving the control channel when the synchronism with the control channel is made off. When the synchronism with the control channel is made off, the equipment is set to a control channel receiving state for a period of time W every period of time t (ST -ST ). When the synchronism with the control channel is not established in the receiving state which is set to N (=X+5) times (X=number of off-synchronism during the past one hour), the equipment is set to shifting to a control channel receiving state for the period of time W every period of time t (ST and ST -ST ). The more frequently a user moves, the larger the time X of off-synchronism becomes and thus N becomes larger by that amount so that a time period until the interval t between each period of the control receiving state is shift to the interval t , is prolonged. Therefore, when the user moves frequently and the possibility of the equipment entering the service area of the cell station from the outside is high, the control channel receiving state brings about frequently. When the user does not move frequently and the possibility of the equipment entering the service area of the cell station from the outside is low, the frequency of bring about the control channel receiving state becomes low and thus emphasis is laid on the consumption of the battery.