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:
Jul. 30, 2002
Filed:
Aug. 20, 1998
Dan Antonsson, Vikingstad, SE;
Fredrik Malmqvist, Karlstad, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
The invention relates to a switching device for switching input data frames (IDF) from a plurality of N input lines (i , i , . . . i , i ) to output data frames (ODF) on a plurality of M output lines (o , o , . . . o , o ). The switching device contains a number K of switch pattern units, each containing a specific switch pattern. A number K of frame store memories (FSM ) each store all input data frames from all input lines in every frame period. Each frame store memory is used for selecting bits to a sub-group of M/K output lines. The parallelly working units (u , u , . . . u ) each sequentially select a plurality of M/K bits from the stored input data frames and simultaneously assign the selected bits to the output data frames on the respective sub-group of output lines. The selection and assigning of bits in each unit is performed at a M/K times higher clock rate than the bit rate on the input data lines. Thus, a bit-orientated reading of input data frames and writing of output data frames is achieved which allows a flexible switching of full rate as well as sub-rate input PCM data frames.