Regulation method and apparatus for ATM cell delay variation

Details Regulation method and apparatus for ATM cell delay variation Regulation method and apparatus for ATM cell delay variation

1995-11-17

1998-06-30

Safourek, Benedict V.

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

348518, 370517, H04L 700

Patent

active

057744661

ABSTRACT:
A regulation apparatus for ATM cell delay variation includes a variation regulating buffer for temporarily storing cells transferred thereto, a variation waiting timer for controlling a waiting time which extends from reception of the first cell to read-out of cells from the buffer, a read-out timer for controlling intervals at which cells are read from the buffer, a latest cell preservation memory for storing the latest cell transferred from a VPI/VCI demultiplexing unit and, a selector for selecting a cell stored in the buffer or in the memory to transfer the selected cell to a cell reproduction unit. The invention further includes, a communication type discriminator for discriminating a communication type in a call set-up phase upon starting a communication and for calculating a variation waiting time in accordance with the discriminated communication type to set the calculated variation waiting time to the variation waiting timer, and a dummy cell inserting circuit for inserting the last reaching cell as a dummy cell if a cell delay time cannot be regulated by the variation waiting time in a communication of sound or moving images.

REFERENCES:
patent: 5533021 (1996-07-01), Branstad et al.
patent: 5541919 (1996-07-01), Yong et al.
patent: 5570372 (1996-10-01), Shaffer

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