Arbitration mechanism for an ATM switch

Details Arbitration mechanism for an ATM switch Arbitration mechanism for an ATM switch

1994-07-11

1996-07-30

Hsu, Alpus H.

Multiplex communications

Wide area network

Packet switching

370 852, 370 856, 3408255, 3408258, H04L 1256, H04Q 1104

Patent

active

055419160

ABSTRACT:
An arbitration method uses no software for achieving fast switching in a large-scale asynchronous transfer mode switch of a cross-bar type. When two or more output requests directed to the same output port compete, NAND operations are carried out for each row of matrix between request signals for the output requests and one bit signals stored beforehand in matrix form. Then, wired OR operations are carried out on the results of NAND operations for each column of the matrix to obtain an internal signal Q for each column. Then, the complementary relationship between the order of the internal signals Q and the order on one row of one bit signals stored beforehand in matrix form is detected to generate an acknowledgement signal for the output request for the row with an order of complementary relationship. The arbitration process is performed very fast because all the processes are executed on hardware.

REFERENCES:
patent: 4897833 (1990-01-01), Kent et al.
patent: 5126999 (1992-06-01), Munter et al.
patent: 5157654 (1992-10-01), Cisneros
patent: 5245603 (1993-09-01), Newman
patent: 5327420 (1994-07-01), Lyles
patent: 5367518 (1994-11-01), Newman
patent: 5367520 (1994-11-01), Cordell

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