Hibernation the summer months is aestivation. Often associated with low temperatures, the function of hibernation is to conserve energy when sufficient food is unavailable. To achieve this energy saving, an endothermic animal decreases its metabolic rate and thereby its body temperature. Hibernation may last days, weeks, or months depending on the species, ambient temperature, time of year, and the individual's body condition. Before entering hibernation, animals need to store enough energy to last through the duration of their dormant period, possibly as long as the entire winter. Larger species become hyperphagic, eating a large amount of food and storing the energy
Fast Dormancy the 3GPP specifications, published in 2010, standardized the data connection idling process and replaced earlier methods such as "Autonomous Signalling Connection Release" with Fast Dormancy. The Fast Dormancy feature resolved the issues reported by mobile carriers by implementing different states that set the level of power consumption and data throughput that the device can utilize. This allows for the device to maintain a consistent connection between data transfers while reducing battery consumption during periods of inactivity. The term "Fast Dormancy" was coined as a short-hand way of describing its main purpose, which is to quickly put mobile devices into a