Method and apparatus for detection of packet types in a communic

Details Method and apparatus for detection of packet types in a communic Method and apparatus for detection of packet types in a communic

1996-04-29

1998-04-28

Olms, Douglas W.

Multiplex communications

Pathfinding or routing

Switching a message which includes an address header

H04L 1250, H04L 1256

Patent

active

057454884

ABSTRACT:
Detection of the packet type of information packets received at a node in a packet based communications network is accomplished by comparing information from each received packet to a table (62) of possible packet types. After packet type has been identified, the corresponding packet is routed for processing based on type. For increased processing speed, the comparison with each of the entries in the table (62) can be performed substantially simultaneously. In one embodiment, a content addressable memory (CAM, 48) is utilized to store the table (62) information and to perform the required comparisons. In addition, wired OR means (50) is provided for use in reducing the total number of entries in the table (62). In a preferred embodiment, the cell types of asynchronous transfer mode (ATM) cells are detected.

REFERENCES:
patent: 5263024 (1993-11-01), Kumaki et al.
patent: 5331634 (1994-07-01), Fischer
patent: 5467345 (1995-11-01), Cutler, Jr. et al.
patent: 5490252 (1996-02-01), Macera et al.

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