Input buffering/output control for a digital traffic switch

Details Input buffering/output control for a digital traffic switch Input buffering/output control for a digital traffic switch

1996-07-11

1998-06-16

Hsu, Alpus H.

Multiplex communications

Data flow congestion prevention or control

370413, H04J 314

Patent

active

057682577

ABSTRACT:
The present invention, generally speaking, uses input buffering and output control to provide a high-speed, high-performance digital traffic switch. Dropped discrete information units (cells) are dropped at the input port, and so will not be transmitted across the switch fabric. This reduces the traffic load on the switch fabric during congested periods, and makes the switch fabric easier to design and expand. Input buffering/output control allows for the use of smaller buffers than output buffered/output control architectures for the same level of "discrete information unit (cell) drop" performance, and scales well to larger systems. Input buffering/output control provides all the information necessary to the output (data flow) controller necessary to implement very precise control algorithms. These algorithms can then administer switch fabric admission polices and contract enforcement fairly across all input ports.

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Chao, H. Jonathan, "Abacus switch figures ATM I/O", Design Supercon '96: Communications Trends, Electronic Engineering Times, pp. 68 and 78 (Jan. 15, 1996).
McKeown & Izzard, High Performance Switching Internet Pub. at http://tiny-tera.Stanford.EDU/tiny-tera/papers/index.html (Nov. 1995).

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