Bus-based communication system

Details Bus-based communication system Bus-based communication system

2007-05-17

2010-12-07

Rinehart, Mark (Department: 2111)

Electrical computers and digital data processing systems: input/

Intrasystem connection

Bus access regulation

C710S107000, C710S309000

Reexamination Certificate

active

07849245

ABSTRACT:
A communications bus operates using transition coding, for example NRZI coding, with transition-dominant signalling. That is, when the signal takes a first binary value, binary “1”, the component drives the bus line to its opposite state, and, when the signal takes a second binary value, binary “0”, the component does not actively drive the bus line. During arbitration, each arbitrating component writes a unique arbitrand onto the bus, and arbitration is lost by each component that writes a binary “0” when at least one other component writes a binary “1”. The components preferably do not use transition-dominant signalling when transmitting data payloads. For such traffic they actively drive the binary “0”s as well as binary “1”s.

REFERENCES:
patent: 5469473 (1995-11-01), McClear et al.
patent: 2006/0171310 (2006-08-01), Ahluwalia et al.
patent: WO 00/00902 (2000-06-01), None
IBM Technical Disclosure Bulletin, vol. 31, No. 12, May 1989, “Delay Compensation for CMSA/DC Bit Arbitration Data Bus Access Control.”
“Transmission Code for CSMA/CD”, IBM Technical Disclosure Bulletin, Jan. 1989.
“CSMA/CD Baseband Network Collision Detection”, IBM Technical Disclosure Bulletin, vol. 32, No. 5A, Oct. 1, 1989, pp. 326-330, XP000048934.

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