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. 18, 2009
Filed:
Jan. 30, 2002
Felipe Rudge Barbosa, Campinas, BR;
Antonio DE Campos Sachs, Campinas, BR;
Mario Tosi Furtado, Campinas, BR;
Felipe Rudge Barbosa, Campinas, BR;
Antonio de Campos Sachs, Campinas, BR;
Mario Tosi Furtado, Campinas, BR;
Ericsson Telecomunicacoes S.A., Sao Paulo-SP, BR;
Abstract
In the present invention, a single-frequency tone is used as addressing header for each optical packet. The frequency of the single-frequency tone is situated within the baseband of the digital payload signal and is preferably a radio-frequency tone. The single-frequency tone is multiplexed with the digital payload and modulated into an envelope of an optical carrier. The frequency is indicative of an address or out-port for the optical packet, which means that different destinations in the network correspond to different frequencies. When switching such an optical packet, the power of the frequency tone is measured. If a tone is present, the optical path corresponding to the allocation is opened by an electronic switch control, and when the tone disappears, the path is closed. Due to the narrow bandwidth of the frequency tone, any disturbance of the digital payload is essentially negligible.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile