Patent ID: 9294999
Filing Date: 2016-03-22
CPC Classification: H04W,Y02D

Claim Text:
1. A method of maintaining a radio time base used to schedule communication in a radio network, the method comprising: determining a course of a frequency relation between a reference oscillator and a clock, wherein the course of the frequency relation is represented by a sequence of the frequency relation for a plurality of points in time prior to a period of reduced power, and wherein determining the course of the frequency relation includes estimating the frequency relation for each of the plurality of points in time of the sequence; determining whether the course of the frequency relation determined so far is insufficient; switching off the reference oscillator during the period of reduced power, wherein the period of reduced power is postponed for further determination as a result of a determination that the course of the frequency relation determined so far is insufficient; predicting, based on a result of the first determination and for a given time in or after the period of reduced power, the frequency relation between the reference oscillator and the clock; restoring, based on a result of the prediction, the radio time base in or after the period of reduced power; and communicating in the radio network at a time determined by the restored radio time base.