Data transmission system and link state managing method...

Details Data transmission system and link state managing method... Data transmission system and link state managing method...

2006-05-09

2010-12-07

Wang, Albert (Department: 2115)

Electrical computers and digital processing systems: support

Computer power control

Power conservation

C710S104000, C713S320000

Reexamination Certificate

active

07849340

ABSTRACT:
A peripheral component interconnect express (PCIE) data transmission system and link state managing method thereof are disclosed. The PCIE data transmission system includes an upstream device, a downstream device and a link. When the link is in a first link state, the downstream device and the upstream device transmit data normally via the link. When the upstream device outputs a turn-off signal to the downstream device, a time period is counted. The downstream device outputs an acknowledging signal to response the turn-off signal. If the upstream device does not receive the acknowledging signal within the time period, the link is transited from the first link state to second link state to remove the power of the link.

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