Hierarchical connection method apparatus and protocol

Details Hierarchical connection method apparatus and protocol Hierarchical connection method apparatus and protocol

1995-06-07

1996-12-03

Kizou, Hassan

Multiplex communications

Diagnostic testing

Using oam cells

371 223, 39518306, G01R 3128, H04B 1700

Patent

active

055815413

ABSTRACT:
A protocol and associated circuitry operable for efficiently extending serial bus capability into multi-level system environments is disclosed. The protocol is designed to coexist and be fully compatible with existing serial bus approaches, or being used as a standalone serial communications bus. The circuitry and protocol described enable the use of a common serial bus in a hierarchically arranged system or network, so that a primary serial bus master device can selectively access any device at any level or position in the network, and send and receive messages and commands to and from the device. The invention disclosed accomplishes this without modifying the existing serial bus protocol, without adding additional signals and without affecting the throughput rate of the serial bus it may be used with. Alternative embodiments applying the invention to a cabled system are described. Additional preferred embodiments are also disclosed.

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