Method and apparatus for waking up a sleeping system
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United States of America Patent
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Mar 1, 2011
Grant Date -
Jan 29, 2009
app pub date -
Sep 30, 2008
filing date -
Aug 23, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
One embodiment of the present invention provides a system that wakes up a sleeping target system located on a target LAN (Local Area Network) from a remote system located on a remote LAN. Because the sleeping target system is in a sleep state, it receives packets of a lower-layer protocol which cannot be used by the remote system to directly send packets to the sleeping target system. During operation, the remote system creates a wake-up packet. The remote system then uses a second protocol to send the wake-up packet to a relay agent located on the target LAN. Upon receiving the first wake-up packet, the relay agent uses the lower-layer protocol to send a second wake-up packet to the sleeping target system, which causes the sleeping target system to wake up.
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