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:
Dec. 20, 2005
Filed:
Dec. 25, 1997
Tomoyuki Ohtani, Ichikawa, JP;
Motoshi Tamura, Tokyo, JP;
Takaaki Satoh, Yokohama, JP;
Hiroki Morikawa, Koganei, JP;
Fumiaki Ishino, Kokubunji, JP;
Tomoyuki Ohtani, Ichikawa, JP;
Motoshi Tamura, Tokyo, JP;
Takaaki Satoh, Yokohama, JP;
Hiroki Morikawa, Koganei, JP;
Fumiaki Ishino, Kokubunji, JP;
NTT Mobile Communications Network, Inc., Tokyo, JP;
Abstract
Disclosed is a mobile communication system including a network constituted of at least one switching center and a plurality of base stations, and a mobile station which communicates with the base stations simultaneously. The system permits varying transmission delay between the switching center and the base stations according to the type of services available to the mobile station. The object of the present invention is to propose a communication which permits varying transmission delay according to the type of service currently employed, and to promptly recover a synchronization state even if an out-of-sync state happens. To attain the object, a memory means (mobile switching center processor) stores transmission delay characteristics corresponding to services which are available to the mobile station. Furthermore, a communication timing setting means (diversity handover trunk) determines the timing of communication for the base stations according to the transmission delay characteristic selected according to the service.