Sleep Mode – which goes under the name standby, sleep or suspend depending on the operating system in use – has been created to save energy in situations where a computer system does not perform any active calculations. The operating system will power down most of the connected hardware devices except for the computer memory which is being used to restore the previous state once the computer ends sleep mode. The unresponsiveness of computer systems that are in sleep mode made it impracticable for certain situations where response is required. This includes staying connected to a computer network, being available in Instant Messengers and VOIP software or availability for remote access.
Sleep Talking, a new system that is called internally Somniloquy has been designed by computer scientists at UC San Diego and Microsoft Research, combines the energy saving benefits of sleep mode with the responsiveness of awake mode. An USB prototype has been created that acts as a low end computer system impersonating the host computer on the network. The prototype comes with the ability to wake the host computer system if necessary. This can be an incoming call using voice over IP or a P2P download that filled the internal flash memory of the USB prototype so that the contents have to be written to the host computer system.
Tests that the researchers conducted resulted in power savings between 60 and 80 percent depending on the use model compared to idle state which is
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