| CPC H04W 56/0045 (2013.01) | 19 Claims |

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1. A method implemented by a first communication apparatus, wherein the method comprises:
obtaining a first timing advance (TA) change rate, wherein the first TA change rate is in a communication process of the first communication apparatus; and
sending an uplink signal in a plurality of first time periods,
wherein there is a first time interval between the first time periods,
wherein a first length of the first time interval and a first location of the first time interval are based on the first TA change rate,
wherein the first length and a second location of the first time interval between a plurality of third time periods are based on a second time interval and the first TA change rate, wherein the second time interval is between a plurality of second time periods in which a second communication apparatus receives the uplink signal, wherein a second time period between every two adjacent first time intervals is one third time period, and wherein a fourth time period before an initial first time interval and a fifth time period after a last first time interval each are one third time period.
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