Method of routing asynchronously transferred message cells with 100% line utilization

A method for routing message cells forwarded with an asynchronous transfer method with 100% line utilization, comprising the steps of:

• storing message cells intermediately in a plurality of blocks, said message cells being intended for forwarding via an interface;
• declaring a sum of message cell rates for the blocks to be higher than a message cell rate of the interface;
• outputting a back pressure signal from the interface when a message cell rate of the interface is exceeded;
• establishing a counter for every block;
• clocking the counters with a clock signal whose cycle corresponds to a message cell cycle;
• outputting an operate signal from the counter for forwarding a message cell when the counter reaches a counter reading that corresponds to a message cell rate declared for the appertaining block;
• outputting an empty signal from every block given non-presence of a message cell intended for forwarding;
• outputting an active operate signal for every block only for those cases when no active back pressure signal together with no active empty signal are established;
• assigning a priority to every individual block;
• and
• selecting one block from said plurality of blocks for which an operate character is set at a moment based on a criterion of priorities allocated to the individual blocks;
• assigning an authorization for forwarding a message cell to the selected block.