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:
Jun. 15, 2010
Filed:
Dec. 15, 2004
Uwe Sulzberger, Stuttgart, DE;
Keld Lange, Ötisheim, DE;
Uwe Sulzberger, Stuttgart, DE;
Keld Lange, Ötisheim, DE;
Evolium S.A.S., Paris, FR;
Abstract
A radio base station has a baseband unit (BB) and multiple RF heads (RH, RH), which are interconnected by means of a bi-directional two-fiber optical ring (R). Each RF head (RH, RH) has a delay counter () for determining a propagation delay (tL) on the ring (R) and a variable delay circuit () for compensating a difference between the propagation delay on the ring and a predefined target delay (tRR). The delay counter counts () the delay between a test signal sent on the first fiber (F) of the ring to the baseband unit and a received test signal looped back by the baseband unit on the second fiber (F) of the ring.