Alcatel

Jürgen Wolde

Emmanuel Dotaro

Laurent Ciavaglia

Matthias Sund

Jörg Karstädt

A method for operating a packet based data network (), the data network () comprising a multitude of nodes (A, B, C, D) and a shared data bus (), wherein at least some of the nodes (A, B, C, D) add traffic to the data bus (), and wherein the upstream nodes (A, B, C, D) reserve data transfer capacity of the data bus () for downstream nodes (A, B, C, D) by means of a fairness mechanism, is characterized in that at least some of the nodes (A, B, C, D) drop traffic from the data bus (), and that said fairness mechanism takes into account the drop traffic at downstream nodes (A, B, C, D). The inventive method allows a better bandwidth utilization and uses available resources more efficiently.

Method for operating a packet based data network

A method for handling data between a clock and data recovery system CDR and a data processing unit DP of a telecommunications network node TNN of an asynchronous communications network, using a bit rate adaptation circuit BAS, the bit rate adaptation system BAS including a memory unit MEM with a write process circuit Wp controlled by the recovered clock Rclk and a read process circuit Rp controlled by the local clock Lclk where the bit rate adaptation system BAS also includes a pointer synchronization controller PSC which, depending on the data detected on the input data signal DIbof the bit rate adaptation system BAS, sets the read and write pointers to a fixed initial address value. A Clock and Data Recovery system and a telecommunications network node TNN of an asynchronous network, which include a bit adaptation circuit BAS according to the invention, are also disclosed.

Method for handling data between a clock and data recovery circuit and a data processing unit of a telecommunications network node of an asynchronous network, as well as a bit rate adaptation circuit and a clock and data recovery system

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Schulzendorf, Germany

Jürgen Wolde