Output‐buffer switch architecture for asynchronous transfer mode

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Abstract
This paper proposes a new asynchronous transfer mode (ATM) switch architecture for the broadband ISDN. The ATOM switch ATM output‐buffer modular switch has a multi‐stage network structure, and is highly modular to facilitate capacity expansion. The ATOM switch element is of the output‐buffer type with a time‐division multiplexed bus and FIFO buffer for each outgoing line. Bit‐slice techniques are used to implement the high‐speed time‐division bus and buffer memories. The output buffer switch has the advantages of no throughput degradation since internal contention is eliminated, and a simple control structure for providing priority and multi‐point connections. This paper also deals with switching delay and buffer overflow probabilities for mixed (bursty and non‐bursty) traffic.

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