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. 24, 1993
Filed:
Jul. 01, 1991
Leon Jasinski, Ft. Lauderdale, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A portable transceiver system (100) has at least one base site (200) capable of communicating with at least one of a plurality of portable transceivers (108). The at least one base site (200) comprises communicators communicating on first and second frequencies (301, 302). The first frequency (301) comprises a plurality of sub-frequencies for communicating from the at least one base site to the plurality of portable transceivers (108), and the second frequency (302) comprises a plurality of time-slots for receiving call initiation signals from the plurality of portable transceivers (108). The at least one base site (100) further comprises a receiver (214) and a detector (218) receiving and detecting, respectively, when the call initiation signal is received from one of the plurality of portable transceivers (108), a channel assignor (220), coupled to the detector (218), allocates a frequency assignment for communicating with an initiating portable transceiver (108) on one of the plurality of sub-frequencies of the first frequency (321), and a transmitter (210) transmitting the frequency assignment to the plurality of portable transceivers (108). Each of the plurality of portable transceivers (108) comprises a portable transmitter transmitting the call initiation signal in one of the plurality of time slots to the at least one base site (200), and a receiver receiving the frequency assignment from the at least one base site (200). The at least one base site (200) uses the time related position of the time-slot as an address to communicate to the initiating portable transceiver (108).