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:
Oct. 05, 1993
Filed:
Apr. 22, 1991
Karl-Albert Turban, Gerlingen, DE;
Lothar Krank, Korntal-Munchingen, DE;
Alcatel N.V., Amsterdam, NL;
Abstract
A method is disclosed for synchronizing a system frame-structured in accordance with a digital synchronous hierarchy, particularly as specified in CCITT G.708. In a hunt mode, one frame sync word is detected, and then a first pointer (AU-4) is read which is spaced a predetermined distance from the sync word and addresses a cell-structured data area (VC4). Then the headers of the ATM cells in the data area, which are addressed via the pointer, are decoded, and if x successive correct cell headers are decoded, a transition to the sync state takes place. If data structures of an SDH system or a purely cell-structured transmission of ATM cells have to be identified, an incoming bit sequence is checked for a predetermined frame sync word (SDH frame) and then for code words representing regularly inserted cell headers, and a change to either a frame sync mode or a cell sync mode takes place.