Method for the control of flows within an ATM switch with distributed architecture
AssigneeThomson-CSF
InventorsMichel Delattre, Marc Bavant, Didier Guerin, Philippe Herau
Life of this patent
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Abstract
A method for the control of flows particularly within an ATM switch transmission network with a distributed architecture. The method distributes a specified number n of shapers to each input line card, a specific shaper being dedicated to the VBRnrt (Variable Bit Rate non real time) category flows as a function of the totalized mean bit rate, and n−1 other shapers being adjusted as a function of the available bit rate (AVCR) of the output ports.
Claims16
A method for utilizing an ATM switch with distributed architecture and storage at input to control flows within the ATM switch, the ATM switch including input line cards and output ports connected to respective of the input line cards, the method comprising:
- distributing, to each of the input line cards, a specified number n of shapers, one shaper being dedicated to a VBRnrt (variable bit rate non-real time) category flow and being adjusted as a function of a totalized mean bit rate of the VBRnrt category flow, and n−1 other shapers being dedicated to ABR (Available Bit Rate) and UBR (Unspecified Bit Rate) category flows;
- associating, with each ABR and UBR connection, a tree whose root is constituted by its respective input line card and whose leave are constituted by respective of the output ports;
- assigning each tree to one of the n shapers chosen as a function of the nominal bit rate of the leaves of the tree being assigned, the chosen shaper being adjusted as a function of the available bit rate of the leaves of all the trees assigned to the chosen shaper.
A method for controlling flow within an ATM switch with distributed architecture and storage at input, the ATM switch including input line cards and output ports connected to respective of the input line cards, the method comprising
- controlling the flow by:
- distributing, to each of the input line cards, a specified number n of shapers, one shaper being dedicated to a VBRnrt (variable bit rate non-real time) category flow and being adjusted as a function of a totalized mean bit rate of the VBRnrt category flow, and n−1 other shapers being dedicated to ABR (Available Bit Rate) and UBR (Unspecified Bit Rate) category flows;
- associating, with each ABR and UBR connection, a tree whose root is constituted by its respective input line card and whose leaves are constituted by respective of the output ports;
- assigning each tree to one of the n shapers chosen as a function of the nominal bit rate of the leaves of the tree being assigned, the chosen shaper being adjusted as a function of the available bit rate of the leaves of all the trees assigned to the chosen shaper.
Dependencies are inferred from the claim text.