Nobody has information about power saving schemes using WIFI connections?

Thank you for the fast reply. My use case is a sensor connecting to Wifi and transmitting every second a short message. How can I reduce the power consumption between the messages. Will the Wifi connection got broken if I switch to a sleep mode and finally how much time do i need to wake up and send...

I need for power consumption calculations some timing informations.
How much time is needed to open wifi connection on access point, send a small block (1Kb) and close connection again?

Best regards
Michael