Sleep phase dependent pressure control and learning methods to optimize sleep quality

A bed including a sleep surface having controllable firmness, comprising:

• pressure devices used in adjusting firmness of the sleep surface;
• pressure sensors configured to sense indications of pressure of the sleep surface;
• and
• a controller configured to command the pressure devices to achieve target pressures based on a sleep position of a sleeper on the sleep surface and a sleep stage of the sleeper on the sleep surface, as indicated by a plurality of target pressure profiles specifying the target pressures, the plurality of target pressure profiles including target pressure profiles that differ for each of a plurality of sleep positions and a plurality of sleep stages;
• with the controller further configured to, from time-to-time:
• command the pressure devices to achieve a set of test pressures different than the target pressures specified by the target pressure profiles;
• determine if a total sleep time for the sleeper on the sleep surface indicates increased total sleep time using the test pressures different than the target pressures specified by the target pressure profiles;
• and, in response to determining that the total sleep time for the sleeper indicates increased total sleep time, replace the target pressures specified by the target pressure profiles with the test pressures.