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:
May. 24, 2005
Filed:
Jul. 07, 2000
Jonathan Alastair Gibbs, Southampton, GB;
Richard Lucas, Hampshire, GB;
Jonathan Alastair Gibbs, Southampton, GB;
Richard Lucas, Hampshire, GB;
Motorola, Inc., Schaumburg, IL (US);
Abstract
The invention concerns a digital radio () for pseudo-duplex radio communication, and a method of transmission time mediation for pseudo-duplex radio communication. A digital radio () is in time division duplex communication with a second digital radio (). The digital radio () derives a source signal activity parameter (VAD) indicating the likelihood of there being a source signal for transmission by the digital radio () to the second digital radio () over a single radio channel. The digital radio () also derives a first value (VADDir) of a signal direction parameter (VADDir) in dependence on both the value of the signal activity parameter (VAD) for the digital radio () and a second value (VADDir) of the signal direction parameter (VADDir) received from the second digital radio (); The digital radio () selects the proportions of time for transmission and reception over the single radio channel in dependence on the first value (VADDir) of the signal direction parameter (VADDir). The digital radio () also transmits the first value (VADDir) of the signal direction parameter (VADDir) to the second digital radio (), to allow the second digital radio () to perform an analogous update of its value of the signal direction parameter (VADDir). The apparatus and method of the invention are robust to radio channel and VAD value imperfections.