Apparatus and method for providing dynamically assigned switch p

Details Apparatus and method for providing dynamically assigned switch p Apparatus and method for providing dynamically assigned switch p

1984-12-14

1987-04-07

Olms, Douglas W.

Multiplex communications

Wide area network

Packet switching

370 99, 365 49, H04Q 1104, H04J 300, G11C 1549

Patent

active

046566260

ABSTRACT:
A CAM/RAM/CAM memory array is used to provide dynamic space and time switching between a plurality of sources and destinations. The memory array includes a source CAM portion, a destination CAM portion and a data RAM portion with each row forming a word. In order to establish a path, a source address is stored in the source CAM portion of a word and a destination address is stored in the destination CAM portion of the same word. When data is to be switched, the data source address is presented to the source CAM on a TDM address bus to address a word having the same source address. The data is then written into the RAM of the addressed word from a data bus, if an address comparison is found. The address of the destination is time division multiplexed to the destination CAM via a destination address bus. If the address of the data destination on the address bus matches a stored address, the data RAM associated with the address is enabled and read to the data bus for delivery to the data destination. Means are further provided to dynamically assign and unassign addresses to and from words in the memory array to thereby dynamically establish switch paths.

REFERENCES:
patent: 3927396 (1975-12-01), Le Can
patent: 4168541 (1979-09-01), Dekarske
patent: 4219883 (1980-08-01), Kobayashi et al.
patent: 4244033 (1981-01-01), Hattori
patent: 4320501 (1982-03-01), Le Dieu et al.
patent: 4467470 (1984-08-01), Waas
patent: 4512014 (1985-04-01), Binz et al.

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