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:
Jan. 11, 2000
Filed:
Feb. 13, 1997
Applicant:
Inventor:
William O Janky, Goode, VA (US);
Assignee:
Ericsson Inc., Research Triangle Park, NC (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J / ;
U.S. Cl.
CPC ...
370347 ; 370330 ; 370437 ;
Abstract
A new air interface protocol compliant with narrowband (12.5 kHz) channels being mandated for use in North America provides a narrowband (i.e., 18 kbps-19.2 kbps), two-slot scaled version of the European TETRA time division signaling that can accommodate different vocoder frame formats. Any vocoder having a frame size that is a submultiple of a certain frame rate can be used. The new air interface is fully compatible with prior frequency division signaling control channels. Adaptive vocoder selection can allow a radio to dynamically select between different vocoding standards and indicate its selection through over-the-air signaling.