Abstract: A user device may: receive, from a network device, timeslot information and a first timing advance value. The first timing advance value may be used by the user device to send a data block to the first network device in accordance with the timeslot information. The user device may further: determine a first distance corresponding to a distance between the user device and the network device; determine a change in position of the user device; determine a second distance based on the change in position of the user device; and determine a second timing advance value based on the first timing advance value, the first distance, and the second distance. The second timing advance value may be used by the user device to send the data block to the network device in accordance with the timeslot information.