Patent ID: 8411664
Filing Date: 2013-04-02
Classification: H04W

Abstract:
1. A method for use in a user terminal in a cellular communications system, the method comprising: the user terminal applying a timing advance to its transmissions to a controlling node, wherein the timing advance being an offset value in time at which the user terminal needs to start its transmission time relative to a nominal transmission time specified by the controlling node; the user terminal requesting communication with the controlling node by means of a special message; in response to the special message the user terminal receiving a response message which includes an updated value for the timing advance; the user terminal comparing the updated value for the timing advance with the value of the timing advance that the user terminal had prior to the reception of said response message, and if the difference (Δ) between the prior value and the updated value is greater than a first predetermined threshold or below a second predetermined threshold, the user terminal ignoring the response message and renewing its request for communication.