| CPC H04W 56/0005 (2013.01) [H04W 56/0045 (2013.01); H04W 74/0833 (2013.01); H04W 74/0866 (2013.01)] | 20 Claims |

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1. A method comprising:
performing a data transfer between a device and a base station;
storing a timing advance value;
determining whether a time interval since the data transfer is less than a threshold value;
determining whether a signal strength measurement of the base station is within a threshold range;
if the time interval since the data transfer is determined to be less than the threshold value and the signal strength measurement of the base station is determined to be within the threshold range, transmitting data to the base station using the stored timing advance value;
if the time interval is determined to be greater than the threshold value or the signal strength measurement of the base station is determined to not be within the threshold range, transmitting a request message to the base station; and
if the request message is transmitted to the base station based on the time interval being determined to be greater than the threshold value or the signal strength measurement of the base station being determined to not be within the threshold range, receiving, from the base station, an updated timing advance value.
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