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:
Aug. 27, 1996
Filed:
Jul. 07, 1993
Tadao Hashimoto, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
In each radio base station of a cellular mobile communication network in which a mobile station is communicative with the radio base stations through a time division multiplex radio link, a transmitter/receiver serves as a synchronization system in cooperation with a base station control unit (35) to synchronize a down-link radio signal generated from a transmission frame generator at a transmission time with a like down-link radio signal transmitted from a different one of the radio base stations. The synchronization system has a received frame regenerator for detecting a reception time of one of frames of an up-link radio signal directed from the mobile station to the different station. A timing controller calculates a time difference between the transmission and the reception time. Controlled by the control unit in accordance with the time difference, the timing controller controls, in turn, the transmission time. Preferably, the time difference is stored in a memory and read out by the control unit when the received frame regenerator receives another of the up-link frames that next follows the above-mentioned one up-link frame.