Electrical computers and digital data processing systems: input/ – Intrasystem connection – Bus interface architecture
Reexamination Certificate
2005-04-18
2008-03-18
Phan, Raymond N (Department: 2111)
Electrical computers and digital data processing systems: input/
Intrasystem connection
Bus interface architecture
C710S300000, C710S306000, C710S062000
Reexamination Certificate
active
07346728
ABSTRACT:
Method and apparatus are described for improving information transfer over USB. In one approach, hub-based extension is realized wherein power is distributed using auxiliary wiring distinct from signal and power wiring present in conventional USB cabling. Additional signals allow optimization of power distribution for powering attached devices, and for detecting and handling illegal connection configurations.In another approach, improvements are realized through use of alternative signaling techniques which eschew reflective and high-speed common-mode signaling. Described are various configuration, media and signal-protocol combinations, including implementations containing embedded hubs. Methods ensuring reliable system behavior are also described, including determination of extension path delay and use of topology-enforcement hubs.In other approaches, further improvements are realized by allowing information exchanges to take longer than the nominal timeout period, or by allowing host requests to be delayed for transmission until the extended bus is available for use.
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Intel Corporation
Pedigo Philip A.
Phan Raymond N
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