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:
Mar. 11, 2014
Filed:
Mar. 16, 2012
Richard D. Fleeter, Reston, VA (US);
John E. Hanson, Mountain View, CA (US);
Scott A. Mcdermott, Washington, DC (US);
Raymond G. Zenick, Jr., Solana Beach, CA (US);
Richard D. Fleeter, Reston, VA (US);
John E. Hanson, Mountain View, CA (US);
Scott A. McDermott, Washington, DC (US);
Raymond G. Zenick, Jr., Solana Beach, CA (US);
Orbcomm Sens, LLC, Rochelle Park, NJ (US);
Abstract
A communication system is provided that allows the use of low-cost, low-power remote terminal units that communicate substantially asynchronously and independently to a base station. To minimize cost and complexity, the remote terminal units are configured similarly, including the use of substantially identical transmission schemes, such as a common Direct Sequence Spread Spectrum (DSSS) code. To minimize collisions among transmissions, the communication system is designed to use a high-gain antenna with a limited field of view, to limit the number of cotemporaneous, or overlapping transmissions that are received at the base station. To cover a wide area, the limited field of view is swept across the area of coverage. To overcome potential losses caused by collisions, the remote terminal units are configured to repeat transmissions; to minimize repeated collisions, the repeat interval and/or duration is randomized.