Method and device of power saving for transmitting signals

摘要

A method and device of the power saving for transmitting a signal is provided. The method comprises the steps of: transmitting a test signal with a first test amplitude from a local terminal, wherein the first test amplitude is selected from a plurality of preset amplitudes; acknowledging that the test signal with the first test amplitude has been received by a remote terminal if an acknowledgement signal is transmitted from the remote terminal for a response to the test signal; and transmitting a data signal having a data amplitude based on the first test amplitude. The device can transmit the data signal with a small data signal amplitude by the method to achieve the saving power.

主权项

1. A power saving method controlled by a Link Training and Status State Machine (LTSSM) in a PCI Express device for data signal transmission during a link training and initialization process, comprising:
providing a local terminal including a first training sequence (TS1) and a second training sequence (TS2); transmitting a test signal from the local terminal to initiate the link training and initialization process, wherein the test signal has a first test amplitude selected from a plurality of preset amplitudes; receiving an acknowledgement signal from a remote terminal when the test signal from the local terminal is received by the remote terminal; acknowledging by transmitting the TS2 of the local terminal from the local terminal if the acknowledgement signal transmitted from the remote terminal for a response to the test signal is received by the local terminal to finish the link training and initialization process; and transmitting a data signal having a data signal amplitude based on the first test amplitude by the local terminal after the link training and initialization process is finished,wherein:
the test signal is one of the TS1 of the local terminal and the TS2 of the local terminal, and the acknowledgement signal includes a second training sequence (TS2) of the remote terminal; and the TS1 and TS2 of the local terminal and the TS2 of the remote terminal are transmitted in the PCI Express device; the local terminal transmits the test signal and receives the acknowledgement signal respectively through a first channel and a second channel, and the first channel and the second channel are arranged as parallel cables; and the method is repeated if at least three consecutive Non-Acknowledgement (NAK) signals are transmitted from the remote terminal and received by the local terminal while the local terminal is transmitting the data signal.